6th Street Bridge
A Mostly Tube Audio Blog
Friday, May 3, 2013
Review: VPI Aries 1 turntable
Introduction:
I've been having turntable envy for years. While I soldiered on with my old VPI HW19 Mark III, my good friend had the much better Mark IV version of the same table. This included a much thicker platter, plinth, and the well-regarded SME309 tonearm. These tables are fairly rare, only popping up on Audiogon or Ebay every once in awhile. I thought of upgrading my own table with a better tonearm and slowly piece together the parts to bring it up to Mark IV status. However, the parts for these old models are getting harder to find, and frankly the dollar amount made me skeptical of that direction.
Obviously VPI - and other manufacturers - are still making turntables, but most of them lacked an option that I thought was of utmost importance: an active suspension. The original VPI HW19 turntables were suspended designs, using heavy duty springs in the corners to isolate the plinth, tonearm, and platter from the surrounding environment. This is hardly a new idea - it has been done with countless turntables like the classic AR, Thorens, and Linn. On the other hand, I've always associated solid plinth (or non-suspended) turntables with the dreck that came out in the 1970s and 1980s - notably the cheaper Japanese turntables that sprouted up everywhere and gave some of the bad vinyl experience that made consumers flee to the digital world.
So where does the Aries 1 fit into all of this? Though it is non-suspended, it was also VPI's first foray into this type of design. It was also supposed to be a cheaper alternative to the TNT, their top of the line model. So basically the Aries sports the TNT's platter but instead of a spring suspension, it uses a solid (and very thick) plinth. The tonearm is also an upgrade over the normal Scout of Scoutmaster, using the JMW10.5 instead. For some reason, not many Aries seem to be sold. The sit in a sort of middle of the road position in the VPI lineup - more expensive than their entry-level models, but still expensive enough that the alternatives: the HRX, The Classics, or the TNTs are almost direct competitors. That means you don't see too many Aries around, and the 1 seems to be even rarer.
Based on the reviews, Arthur Salvatore's recommendation, and the quality of the platter and bearings, the Aries 1 has always been on my list of possible upgrades. Though it lacked a true suspension, I thought that perhaps with enough mass loading, even having the "limitations" of a solid plinth could be overcome. When a conversation with the owner of local record/stereo store brought up the Aries 1, I knew this was one table I had to try and snag. He was willing to sell it for a lower price than I was seeing on Audiogon, and it would also mean no shipping. That means a lot when buying something so fragile.
It only took one glance at the beautiful piano black plinth, the super thick 25lb TNT platter, and the well-made JMW tonearm to know that I would be willing to put a sizable dent into my credit card. So off I went, heading home with a lovely turntable and a bite of debt.
The Design
As mentioned before, the Aries 1 table sports a heavy-duty platter composed of aluminum and acrylic, weighing in at a heft 25pds. Supposedly - and I have no direct experience with this - this earliest version is superior to the later lighter frosted acrylics platters. Beneath this is the thick solid plinth made of MDF and painted with a glossy black. Like the Scout and Scoutmaster, the motor is not bolted to the plinth. Instead it sits inside a carve out with no direct connection to the turntable except for the belt. The motor chassis itself is very, very heavy and does not move or rock back and forth when turned on. The tonearm on this particular version is the JMW 10.5i which has Nordost wiring. It's a unipivot design which essentially has the entire arm resting on a single minute point. When moving the tonearm over the records, this can lead to some unsettling rocking side-to-side motion. However after prolonged use, one realizes how sturdy the whole contraption feels.
Initial Impressions:
Since I only had a Denon DL-110 on hand, that was the first cartridge I plugged in. With some additional headshell weight - an additional metal tab provided with the cartridge - I soon had the tonearm dialed in. The supplied VPI jig certainly helped, along with my digital pressure gauge. More details for setup here. One thing I really liked was the tonearm connection "junction" box that allows interconnects to be plugged directly into the table. This is certainly better, at least if you enjoy swapping cables around, than dealing with one set of wire that could possibly be too short.
I threw on a copy of Neil Young - Live at Massey Hall (Pallas) which is a high quality recording. I was struck by the sheer quietness of the Aries turntable. The normal background rumble and wash that I unconsciously filtered out with my other tables was suddenly gone. The effect reminds me, oddly enough, of the CD! However, the Aries is not lacking in detail, nor are subtle musical cues missing. Instead the separation of motor, the heavy plinth and platter, along with the tonearm has given this turntable a foundation that allows the music to spring from total blackness. Simply amazing.
Not only is the background incredibly quiet, but the dynamic and bass control also reminds me of the better parts of digital. For example, listening to The Police - Synchronicity (Japanese) and there was terrific low frequency control and detail that gave a bouncy excitement to the music. The dynamic sweeps, from softest to loudest, seem almost infinite in scale. This is not your father's turntable.
Upgrading the Cartridge:
The Denon DL-110 phono cartridge is no slouch and is certainly one helluva a bargain at $139. Nonetheless, I felt the urge to upgrade. A better match for the tonearm was the Dynavector 10X5, a cartridge that I had run before with much success. Thanks to a friend, I was able to procure one with low hours at a price lower than new. Once again installation was a breeze.
The Dynavector 10X5 brought further refinement to the sound: more detail, deeper bass, a controlled treble, and a large sense of scale. The sonic attributes already mentioned: black background and dynamic scale were only improved even more so. After listening to several records and doing some dialing in with cable swaps, speaker positioning, and tonearm adjustments, I came up with following impressions:
Sonic Attributes:
Bass: This is one of the major strong points of this turntable. It can reach Stygian depths, the likes that are normally the province of the digitial medium. Along with this extraordinary depth comes control and slam. This makes rhythmic music gel together in a foot-tapping way, but also adds to the foundation of the performance. This level of bass performance is simply wonderful.
Midrange :Like the bass, the keyword here is control. The lack of muddiness and the washed out effect that lower turntables generate, leads to clarity. Minute details are more apparent. The end result is a very refined sound, but not one that is overtly so. That is to say the turntable serves the music embedded in the vinyl, not the other way around. This allows the character of the recording to come through with delicacy, aggression, or whatever was intended by the artist. This bloom and body is something that the digital medium has a hard time with, and lesser turntables can only catch a glimpse of.
Treble: Refined is the first word that comes to mind. Like the midrange, the lack of fuzziness brings plenty of detail to the table. A poor recording will sound harsh, while a good recording will bring out the delicate reverb of the hall or the sweeping shimmer of the cymbal. There is no glossed over warmth here, or masking effects from roll-off.
Other: If I could fault the Aries in any way, it would be the slight mechanical reproduction of the music. You see the lack of muddiness leads to an extremely open sound that honestly reminds me of digital in many ways. Now don't get me wrong, this is no Magnavox CD player, but an extremely musical machine that is also ruthlessly revealing. This lack of uber-analog warmth my turn off some listeners used to a richer euphonic sound. Personally I prefer gear that speaks to what the recording has to offer, not to give a pleasant coloration.
Conclusion:
The VPI Aries 1 has been a major upgrade. Not only has this turntable blown away my expectations of solid versus suspended plinths, it has also brought my entire stereo up another notch in fidelity. It's quite common to get carried away with a new piece of gear, but lengthy listening has proved that the Aries is no flash in the pan. In the wide world of turntables, I'm sure *better sonics could be found, but expect to pay for it. Highly recommended.
* I see that the VPI Aries 3 has an asking price of $6000USD. I'm not sure if this would be a good bargain, so if you are interested in this particular model, be sure to shop used. An Aries that has been well cared for will be a better deal than many new turntables in the same price range.
Review System:
VPI Aries with JMW 10.5i tonearm and SDS Power Supply
Dynavector 10X5
Cardas Cross 1M interconnects
Quicksilver preamplifier with Mullard short-plate 12AX7s, RCA 12FQ7s, Raytheon black-plate 5814
Cardas Quadlink 5C .5M interconnects
B&W Bass Equalizer
Cardas Quadlink 5C 1M interconnects
EICO HF-60 monoblocks with Mullard XF2 EL34s, EF86s, 5AR4s, and GE 6SN7GTAs.
Cardas Hexlink speaker cable
B&W Matrix 805 mini-monitors
VTI UF29 stands
VTI BL503 equipment rack
Labels:
Aries 1,
Aries I,
cartridge,
Denon DL-110,
Denon DL110,
differences,
Dynavector 10X5,
how does it sound,
HW19,
platter,
plinth,
record player,
review,
solid,
suspended,
table,
TNT,
turntable,
upgrade,
VPI Aries
Friday, April 26, 2013
Review: B&W Matrix 805 loudspeakers
Introduction
Bowers and Wilkins have long been audiophile darlings. I'm no historical expert, but from my many years of reading the audio specialty magazines, it is the venerable 801 studio monitor that cemented their reputation. Unlike many other speaker makers, they also produce their own drivers, and have an engineering staff on board to build excellent crossovers and cabinets. This attention to quality is hardly extraordinary in the world of audiophiles, but like their British competitor KEF, it speaks of a long term love of the black arts of speaker design.
My own personal experience with B&W is very, very short. The only pair I've personally heard was back in the 80s, when my best friend had a pair of stand mounted units of an unknown model. I don't specifically remember much about the sound other than the speakers could take all the power that the Denon receiver could dish out. This was, of course, before my audiophile days, when playing clean and loud was all that mattered to my teenage ears.
Time for a New Speaker?
Moving to a new house with a smaller listening space, and a Denon DL-103R cartridge that got damaged during the move, tempered my audiophile equipment craving. Instead I pulled back on my expenditures, scaling back the size and quality of my system by going with a pair of KEF iQ30 speakers that I already owned, and buying a new Denon DL-110 cartridge. I even stuck in some Chinese EL34 tubes for my Eico HF60 monoblocks, wanting to save my vintage Mullards for the day when I had a larger listening room.
However, fate being what it is, those plans of hanging back were thwarted by the purchase of a VPI Aries 1. This was not a turntable purchase that I was planning to make, but it was such a hard deal to pass up - being local and priced lower than what I was seeing on Audiogon - that I took the plunge. The resulting sound, even through the budget KEF monitors, was a major eye-opener. I'll be reviewing this turntable in a separate post, but needless to say the overall sound, even with a budget priced Denon DL-110, became much more dynamic, involving, and was quite the step up in reproduction. After hearing the Aries, I knew that to get the full effect I had to upgrade the rest of my stereo system. I also knew that with my smaller listening space that approaching the bass and dynamics of the UREI would be near impossible, but perhaps I could be sated with a mini-monitor of high enough quality.
My initial thought was to go with KEF - specifically the KEF LS50, but the low efficiency of 85dB made me wonder if 60Ws of tube power would be enough. The lower-end models of KEF had their own issues. For example I wondered if the current Q300 model would really be a major upgrade versus the iQ30s currently in the system. Browsing through Audiogon for monitors under one thousand dollars, I came across the B&W Matrix 805s, the baby brother of the famed 801s. My interest piqued, I read the Stereophile review and this post by Ken Rockwell. Both are excellent starting points if you wish to have a deeper technical description of these speakers. Needless to say, I was thoroughly interest in this speaker now. Though the efficiency is only a rated 87dB, it still seemed worth taking the risk. I purchased the 805s and soon had them in my hands.
Initial Impressions
Opening the box and unwrapping the yards of bubble wrap, I was greeted with a very nicely built pair of mini-monitors. The enclosure made of rosewood (veneer?) is very lovely. Binding posts on the rear are recessed and gold. The woofer is a 6.5" kevlar unit while the removable bullet tweeter on top is a metal dome that is time-aligned by a fourth-order crossover. An extra feature is the optional outboard electronic crossover/filer the cuts bass off below 10Hz but firms up the response between 10Hz and 50Hz. This could be useful to reduce turntable subsonics and improve the low-end for rock or symphony music.
Installation was on top of my UTI 29" tall stands, bi-wired with budget Kimber 8PR/4PR. Distance between the speakers was some 7' from each other and perhaps 2' from the sidewalls and 3' from the rear wall. Obviously not a cavernous listening area, eh?
Using the Denon DL-110 cartridge, along with Hitachi 5AR4s and Shuguang EL34s installed in the Eico HF60s. The first record up on the Aries 1 turntable was Neil Young's "Live at Massey Hall". This recording is fantastic - however with only one singer and guitar (or piano) it is by no means a complex or very dynamic album. Nonetheless, it is a good album for picking out overall sound quality. The treble sounded very clean and polite. The midrange was clear with plenty of detail and space. The bass, which isn't very deep on this album, had a slightly wooden character.
The next two albums: a German pressing of Pink Floyd's "Animals" and a Japanese pressing of Steely Dan's "Greatest Hits" showed the natural limitations of all small speakers. As expected, ultimate dynamic range and the lower bass of the B&W 805s were limited by the small woofer size. Yes, I'm being quite unfair comparing such a minute speaker to the massive UREI 813As, but I'm just reporting what I heard. When the bass got really deep, the 805s didn't choke, but instead began to slowly compress, leading to the already mentioned wooden character to the bass. However, throughout the dynamic swings, the sound still remained balanced and focused without getting gritty or uncontrolled like the KEF iQ30s.
Getting Deeper:
Now it was time to upgrade the rest of my system. First it was a new cartridge: the Dynavector 10X5. This is a good, dynamic high output moving-coil cartridge that works quite well with the Aries 1 turntable. After that, it was time to bring out the best tubes I had for my Eico HF-60s. Out went the Hitachi and Shuguangs, and in went my vintage Mullard tubes. I also replaced the GEC CV4085s (EF86) with the very earliest and rare "long plate" versions that Mullard made.
These changes were proof positive that rolling in the right tubes can have a major impact on the sound. Not only did the midrange become more relaxed, but the higher frequencies were even smoother than before. The Dynavector 10X5 has always been a dynamic cartridge and partnered well with the B&W 805s. Sure, the UREI 813As still hold sway in the explosive bass department, but for such a small speaker, the overall frequency response was much improved.
You Got to Equalize!
B&W also included a small bass equalizer with the 805s. Since I didn't have another pair of Cardas interconnects on hand, I opted to use some budget Canare wire to make the connection between the Quicksilver preamplifier and bass equalizer. From the output of this little unit, Cardas Cross wire was used.
The change was immediately apparent - this small speaker now growled like a much larger speaker. Again, it was nothing like a big speaker with multiple drivers, but it sure helped with rock 'n' roll music. The wooden character of the bass was gone and instead became really firm and punchy. However there was a bit of detail loss, but for the types of music I listen to, I definitely preferred the improved bass response. Now I will have to go ahead and buy a short run of Cardas interconnects. However purists or listeners of lighter fare may prefer the speakers without the additional wiring and active equalization. Try it both ways.
Speaker Cable Upgrade:
The Kimber 8PR/4PR is great budget wire, but I was curious to hear how my vintage Cardas Hexlink speaker cable would fare. So back in went the binding post jumpers on the 805s, and on went the Cardas. The change was quite immediate - the slightly bright, polite sound became much more relaxed. The top-end treble also smoothed out, turning the monitor into one warm, full-bodied speaker. Wow. I would never expect such a major character change from a few feet of cable.
Details R Us
Bass Response: Hey, this is a small speaker with a relatively tiny woofer. Expecting subterranean bass suitable for hard rock or organ music is just plain wishful thinking. If you like that kind of music, you either need a larger speaker or an additional subwoofer. However, with the B&W bass equalizer installed, lower frequencies are served well enough that I don't miss my big studio monitors (too much). The sound became really punchy with good detail. It wasn't all boom either, but instead the bass became very tight and controlled. Obviously some thinking went into the speaker crossover design and the additional needs of the equalizer. Again, very dependent on system and musical tastes.
Midrange: Compared to the UREI 813As, which are ruthlessly neutral as befitting a real studio monitor, the 805s have a slightly recessed sound when using the Kimber wire. This was tremendously reduced by the Cardas cable. When the music gets really busy or the dynamics really start swinging, it's almost as if the speaker is slightly "holding back" as the big peaks swell up. Once again, perhaps this is just the effect of a small speaker being asked to do the work of a larger one.
Detail was exemplary - fingers on strings, studio effects, and overdubs were just that more obvious than many other (more budget) speakers I've heard. The level of available information was much higher than my old Magnepan 1.6QRs, but not quite in the Quad ESL-63 league.
Treble: The 805 tweeter ranks up there with some of the better I've heard. It's clean but not totally antiseptic. It's also very detailed Sure, it doesn't quite strike in the electrostatic speaker or the plasma tweeter level, but it's no slouch either. Admittedly there is a slight bump in the highest of frequencies, so some system matching is paramount here. For example, the wrong solid-state amplification or an aggressive moving-coil or DAC could play havoc with the system balance. Be also sure to play with speaker wire, as my Kimber vs. Cardas experiment proved.
Other: Even at loud listening levels, the 805s never fall apart. That is to say the speakers never sound ragged or uncontrolled. Soundstaging placement, width and depth are also very good, letting instruments and voices sit naturally within the space of the recording. There was some minor shrinkage - as to be expected - of image size compared to larger speakers.
Conclusion:
Speakers in the less than one-thousand dollar range are a hard nut to crack. My advice in this range is to buy the best used model you can afford. The B&W Matrix 805 is one such model. I'm sure there are many others, but few in this price range can match the engineering, quality, and performance of these top level speakers. I expect the 805s to have a long shelf-life in my current system. Highly recommended.
Review System:
VPI Aries with JMW 10.5i tonearm and SDS Power Supply
Dynavector 10X5
Cardas Quadlink 5C 1M interconnects
Quicksilver preamplifier with Mullard short-plate 12AX7s, RCA 12FQ7s, Raytheon black-plate 5814
Cardas Cross 1M interconnects
EICO HF-60 monoblocks with Mullard XF2 EL34s, EF86s, 5AR4s, and GE 6SN7GTAs.
Kimber 8PR/4PR 2M bi-wire cable or Cardas Hexlink
VTI UF29 stands
VTI BL503 equipment rack
Bowers and Wilkins have long been audiophile darlings. I'm no historical expert, but from my many years of reading the audio specialty magazines, it is the venerable 801 studio monitor that cemented their reputation. Unlike many other speaker makers, they also produce their own drivers, and have an engineering staff on board to build excellent crossovers and cabinets. This attention to quality is hardly extraordinary in the world of audiophiles, but like their British competitor KEF, it speaks of a long term love of the black arts of speaker design.
My own personal experience with B&W is very, very short. The only pair I've personally heard was back in the 80s, when my best friend had a pair of stand mounted units of an unknown model. I don't specifically remember much about the sound other than the speakers could take all the power that the Denon receiver could dish out. This was, of course, before my audiophile days, when playing clean and loud was all that mattered to my teenage ears.
Time for a New Speaker?
Moving to a new house with a smaller listening space, and a Denon DL-103R cartridge that got damaged during the move, tempered my audiophile equipment craving. Instead I pulled back on my expenditures, scaling back the size and quality of my system by going with a pair of KEF iQ30 speakers that I already owned, and buying a new Denon DL-110 cartridge. I even stuck in some Chinese EL34 tubes for my Eico HF60 monoblocks, wanting to save my vintage Mullards for the day when I had a larger listening room.
However, fate being what it is, those plans of hanging back were thwarted by the purchase of a VPI Aries 1. This was not a turntable purchase that I was planning to make, but it was such a hard deal to pass up - being local and priced lower than what I was seeing on Audiogon - that I took the plunge. The resulting sound, even through the budget KEF monitors, was a major eye-opener. I'll be reviewing this turntable in a separate post, but needless to say the overall sound, even with a budget priced Denon DL-110, became much more dynamic, involving, and was quite the step up in reproduction. After hearing the Aries, I knew that to get the full effect I had to upgrade the rest of my stereo system. I also knew that with my smaller listening space that approaching the bass and dynamics of the UREI would be near impossible, but perhaps I could be sated with a mini-monitor of high enough quality.
My initial thought was to go with KEF - specifically the KEF LS50, but the low efficiency of 85dB made me wonder if 60Ws of tube power would be enough. The lower-end models of KEF had their own issues. For example I wondered if the current Q300 model would really be a major upgrade versus the iQ30s currently in the system. Browsing through Audiogon for monitors under one thousand dollars, I came across the B&W Matrix 805s, the baby brother of the famed 801s. My interest piqued, I read the Stereophile review and this post by Ken Rockwell. Both are excellent starting points if you wish to have a deeper technical description of these speakers. Needless to say, I was thoroughly interest in this speaker now. Though the efficiency is only a rated 87dB, it still seemed worth taking the risk. I purchased the 805s and soon had them in my hands.
Initial Impressions
Opening the box and unwrapping the yards of bubble wrap, I was greeted with a very nicely built pair of mini-monitors. The enclosure made of rosewood (veneer?) is very lovely. Binding posts on the rear are recessed and gold. The woofer is a 6.5" kevlar unit while the removable bullet tweeter on top is a metal dome that is time-aligned by a fourth-order crossover. An extra feature is the optional outboard electronic crossover/filer the cuts bass off below 10Hz but firms up the response between 10Hz and 50Hz. This could be useful to reduce turntable subsonics and improve the low-end for rock or symphony music.
Installation was on top of my UTI 29" tall stands, bi-wired with budget Kimber 8PR/4PR. Distance between the speakers was some 7' from each other and perhaps 2' from the sidewalls and 3' from the rear wall. Obviously not a cavernous listening area, eh?
Using the Denon DL-110 cartridge, along with Hitachi 5AR4s and Shuguang EL34s installed in the Eico HF60s. The first record up on the Aries 1 turntable was Neil Young's "Live at Massey Hall". This recording is fantastic - however with only one singer and guitar (or piano) it is by no means a complex or very dynamic album. Nonetheless, it is a good album for picking out overall sound quality. The treble sounded very clean and polite. The midrange was clear with plenty of detail and space. The bass, which isn't very deep on this album, had a slightly wooden character.
The next two albums: a German pressing of Pink Floyd's "Animals" and a Japanese pressing of Steely Dan's "Greatest Hits" showed the natural limitations of all small speakers. As expected, ultimate dynamic range and the lower bass of the B&W 805s were limited by the small woofer size. Yes, I'm being quite unfair comparing such a minute speaker to the massive UREI 813As, but I'm just reporting what I heard. When the bass got really deep, the 805s didn't choke, but instead began to slowly compress, leading to the already mentioned wooden character to the bass. However, throughout the dynamic swings, the sound still remained balanced and focused without getting gritty or uncontrolled like the KEF iQ30s.
Getting Deeper:
Now it was time to upgrade the rest of my system. First it was a new cartridge: the Dynavector 10X5. This is a good, dynamic high output moving-coil cartridge that works quite well with the Aries 1 turntable. After that, it was time to bring out the best tubes I had for my Eico HF-60s. Out went the Hitachi and Shuguangs, and in went my vintage Mullard tubes. I also replaced the GEC CV4085s (EF86) with the very earliest and rare "long plate" versions that Mullard made.
These changes were proof positive that rolling in the right tubes can have a major impact on the sound. Not only did the midrange become more relaxed, but the higher frequencies were even smoother than before. The Dynavector 10X5 has always been a dynamic cartridge and partnered well with the B&W 805s. Sure, the UREI 813As still hold sway in the explosive bass department, but for such a small speaker, the overall frequency response was much improved.
You Got to Equalize!
B&W also included a small bass equalizer with the 805s. Since I didn't have another pair of Cardas interconnects on hand, I opted to use some budget Canare wire to make the connection between the Quicksilver preamplifier and bass equalizer. From the output of this little unit, Cardas Cross wire was used.
The change was immediately apparent - this small speaker now growled like a much larger speaker. Again, it was nothing like a big speaker with multiple drivers, but it sure helped with rock 'n' roll music. The wooden character of the bass was gone and instead became really firm and punchy. However there was a bit of detail loss, but for the types of music I listen to, I definitely preferred the improved bass response. Now I will have to go ahead and buy a short run of Cardas interconnects. However purists or listeners of lighter fare may prefer the speakers without the additional wiring and active equalization. Try it both ways.
Speaker Cable Upgrade:
The Kimber 8PR/4PR is great budget wire, but I was curious to hear how my vintage Cardas Hexlink speaker cable would fare. So back in went the binding post jumpers on the 805s, and on went the Cardas. The change was quite immediate - the slightly bright, polite sound became much more relaxed. The top-end treble also smoothed out, turning the monitor into one warm, full-bodied speaker. Wow. I would never expect such a major character change from a few feet of cable.
Details R Us
Bass Response: Hey, this is a small speaker with a relatively tiny woofer. Expecting subterranean bass suitable for hard rock or organ music is just plain wishful thinking. If you like that kind of music, you either need a larger speaker or an additional subwoofer. However, with the B&W bass equalizer installed, lower frequencies are served well enough that I don't miss my big studio monitors (too much). The sound became really punchy with good detail. It wasn't all boom either, but instead the bass became very tight and controlled. Obviously some thinking went into the speaker crossover design and the additional needs of the equalizer. Again, very dependent on system and musical tastes.
Midrange: Compared to the UREI 813As, which are ruthlessly neutral as befitting a real studio monitor, the 805s have a slightly recessed sound when using the Kimber wire. This was tremendously reduced by the Cardas cable. When the music gets really busy or the dynamics really start swinging, it's almost as if the speaker is slightly "holding back" as the big peaks swell up. Once again, perhaps this is just the effect of a small speaker being asked to do the work of a larger one.
Detail was exemplary - fingers on strings, studio effects, and overdubs were just that more obvious than many other (more budget) speakers I've heard. The level of available information was much higher than my old Magnepan 1.6QRs, but not quite in the Quad ESL-63 league.
Treble: The 805 tweeter ranks up there with some of the better I've heard. It's clean but not totally antiseptic. It's also very detailed Sure, it doesn't quite strike in the electrostatic speaker or the plasma tweeter level, but it's no slouch either. Admittedly there is a slight bump in the highest of frequencies, so some system matching is paramount here. For example, the wrong solid-state amplification or an aggressive moving-coil or DAC could play havoc with the system balance. Be also sure to play with speaker wire, as my Kimber vs. Cardas experiment proved.
Other: Even at loud listening levels, the 805s never fall apart. That is to say the speakers never sound ragged or uncontrolled. Soundstaging placement, width and depth are also very good, letting instruments and voices sit naturally within the space of the recording. There was some minor shrinkage - as to be expected - of image size compared to larger speakers.
Conclusion:
Speakers in the less than one-thousand dollar range are a hard nut to crack. My advice in this range is to buy the best used model you can afford. The B&W Matrix 805 is one such model. I'm sure there are many others, but few in this price range can match the engineering, quality, and performance of these top level speakers. I expect the 805s to have a long shelf-life in my current system. Highly recommended.
Review System:
VPI Aries with JMW 10.5i tonearm and SDS Power Supply
Dynavector 10X5
Cardas Quadlink 5C 1M interconnects
Quicksilver preamplifier with Mullard short-plate 12AX7s, RCA 12FQ7s, Raytheon black-plate 5814
Cardas Cross 1M interconnects
EICO HF-60 monoblocks with Mullard XF2 EL34s, EF86s, 5AR4s, and GE 6SN7GTAs.
Kimber 8PR/4PR 2M bi-wire cable or Cardas Hexlink
VTI UF29 stands
VTI BL503 equipment rack
Thursday, April 11, 2013
Building a single-ended 6CB5A amplifier
Introduction:
After the success and sale of my single-ended 1625 amplifier, for my next amplifier build I decided to return to the venerable triode. However, I wanted a bit more power than your average single-ended 2A3 amplifier, but still didn't want to use the pricey 300B. With that in mind, I looked at several push-pull designs using the 6B4G or 2A3. Once again I ran into expensive tubes, even for Russian or Chinese versions, and pricey interstage iron. However, after reading several threads on diyaudio.com, I came across Thomas Mayer's blog describing the use of the 6CB5A - a TV vertical deflector tube - in single-ended mode to make 7Ws. He touted it as a budget alternative to the 300B, and at ~$5 to $6 a pop on Ebay, it certainly would cut down on the output tube cost.
Circuit:
Once I had the signal schematic in hand, I went and designed my own power supply circuit around a budget priced Edcor transformer. Note that the 6CB5A uses a mighty 2.5As of current at 6.3V. This required an additional filament transformer for the 6N7 driver tubes, and, in order to reduce costs, I stuck with a 5V rectifier tube instead of a more budget TV damper diode.
Parts:
Once again, this is a budget build, so Mouser and Allied Electronics were used heavily. This means electrolytics used in series to get a high enough voltage rating, Cornell-Dublier metallized polypropolene coupling capacitors, plastic speaker binding posts, and plenty of KOA resistors. Output transformers are 3.5K/6-ohm units from Edcor. The power transformer was also sourced from them. For the top plate I used Front Panel Express. As you can see from the finished picture, the distance between the two output transformers is less than ideal - I was lucky that they fit at all considering this portion of the layout was just eyeballed. Wood chassis is from Valab, an Asian Ebay seller. Quality of the wood chassis is so-so and the associated hardware leaves something to be desired.
Construction:
This was an exercise in point-to-point wiring, somewhat frustrating due to mistakenly using terminal strips without eyelets. A single star ground is used near the RCA input jacks. Wiring is all plated solid-core. Due to the simplified power supply and lack of regulation, this unit was much easier to finish than the 1625 amplifier.
Listening:
After a quick voltage and current check, I hooked this amplifier up to a pair of Pioneer BS-21 speaker that I use for test purposes. At 84dB efficiency, these aren't exactly a great match for single-ended amplifiers, but at least I can tell if music is being made. The sound, via my VPI table and Quicksilver preamplifier, was very smooth without any noticeable hum or other noise. With my medium-output moving coil cartridge, I had to turn the volume control way up to get any decent playback level. Of course such a low gain amplifier will prove to be useful for much more efficient speakers than the test Pioneers units.
After everything checked out, it was time to listen to the 6CB5A amplifier with the KEF iQ30s. Once again my big UREI 813As, which would be a much better match, are in storage so I had to make due with what is on hand.
The sound was obviously much better with some more efficient speakers, but in comparison to the Eico HF-60s, the bass was slightly underdamped and the treble seemed rolled off. Much of this effect has to do with the lack of negative feedback, which results in a lower damping factor and less bandwidth. However, as the amp broke in, the treble seemed to gain some further extension. Of course the KEF iQ30s aren't exactly the most low-powered amplifier friendly speakers around, so much better results will be had with something from: Altec, Klipsch, Zu, etc.
Another concern was the lack of power. For example, when listening to Sinatra at the Sands, any big dynamic swings became compressed, lacking the punch and drive of a mightier push-pull amplifier. Once again this boils down to the lack of immediate available power - 7 or 8 watts just doesn't cut it with many speakers unless they are very efficient or the listener does near-field listening. Keep this in mind before construction.
Not to press the point, but in comparison to the my single-ended 1625 Pentode amplifier, the 6CB5A based design has less gain, a smoother, more midrangey sound, and looser bass. The 1625 amp really seemed to work better with less efficient speakers, even though it only has a few more watts on tap. The difference between these two amplifiers, aside from the driver and the output tubes operation, is the negative feedback. Even though loop feedback gets plenty of bad press these days, I believe if applied correctly, it really helps to broaden the number of speakers that an amplifier works best with.
Conclusion:
Single-ended amplifiers - even using triodes - require careful speaker matching. Many speakers are too inefficient and have wild impedance curves that require more power and low output impedances. At least with my collection of speakers, any immediate improvement of the 6CB5A (in triode mode) over the 1625 (in pentode) was not immediately apparent. However, a more efficient speaker could easily change this impression. Stay tuned for some further speaker experiments.
Wednesday, April 3, 2013
Dividebytube's Guide to Building an Audiophile System
I've been into this hobby for a number of years and have gone down several dead ends. This little article is a sort of "lessons learned" piece, which may be of some benefit to a beginner - or even an experienced - audiophile.
Consider the Source:
Like Linn, I believe having a good signal source is the most important part of any good stereo system. Some others will tell you to spend the majority of the budget on speakers, or even the amplifier. However, I've found a cheap CD player or turntable will just lead to heartache, making the listener chase their tail trying to find the best speaker or amplifier to match with the inferior sound quality. Is the speaker too bright or is it the cruddy op-amp in the digital-to-analog converter? Is the amplifier muddy or does the turntable poorly constructed, picking up vibration? A fairly neutral source provides the foundation for good system building.
Amplifier Envy:
This idea is closely related to the first concept of source quality - don't go crazy with finding "the right" amplifier until you have nailed down your front end. Yes, just the right amplifier does make a big difference, especially tubes versus solid-state or Class A versus Class AB, but don't worry about this aspect as much until you have sorted out the source and the speakers. There are plenty of budget models out there that will do the job until the time is right for an upgrade.
Boom and Sizzle:
Speakers are like luggage - easy to buy and almost impossible to sell. Before buying any speaker, consider your listening room, environment, and music likes. For example, a small space will require a small speaker - there is no reason to excite room nodes and get a muddy sound with a monster speaker crammed inside of a tiny space. If you have little children - a Quad Electrostat or a mini-monitor on a slender stand - may not be the best route. And small speakers may not reproduce bass all that well, which won't work for head-banging levels, unless a subwoofer is used.
Picking an Amplifier:
I like tube amps, especially single-ended and/or low-powered ones. Good sounding amplifiers of a higher wattage are few in number, but they do exist. The Eico HF-60 and (rebuilt correctly) Dynaco Mark III monoblocks come to mind. However one has to be smart enough to realize that tube amplifiers may not always be the best match for the speaker, especially if low-efficiency, wild impedance curves, or a large listening space is being used. In this case, perhaps a bigger tube amp or a good solid-state unit is in order. For example, matching a 20W 6BQ5 amplifier to a pair of Magnepans will lead to nothing but frustration, unless incredibly low playback levels are your thing.
The Good, The Bad, and the Feedback:
Zero Negative Feedback and single-ended was quite the rage for awhile. However, these types of amplifiers require efficient speakers with higher impedance curves - think Altec-Lansing horns, Klipsch, or (modern) Zu speakers. Pairing a single-ended 2A3 amplifier to a 4-ohm nominal speaker can result in some strange effects: muddy, underdamped bass or perhaps a rolled-off treble. Some listeners may like this effect, but it isn't fidelity since the "romantic" tubey sound can dominate the music to the point where the differences between recordings becomes almost negligible. That is to say, if every record or CD sounds the same, then you're listening to a pleasant distortion machine, not a high-fidelity amplifier. In this case feedback - if judiciously applied - can actually help, providing speaker damping and extending frequency response.
Short Circuit:
Another strange audiophile fancy is the love for boutique parts. Now don't get me wrong, I've personally heard differences between coupling capacitors, resistors, and wire. But I also know that the circuit itself is the most important part, not the parts supporting it. For example, a poorly design SRPP tube linestage isn't going to be greatly improved by slapping in a Teflon capacitor. The circuit itself needs to be corrected, or an alternative and improved preamplifier needs to be purchased.
Flash in the Pan:
The high-end audio scene is filled with hyped products and broken dreams. I could name company after company that have failed since the 1980s, and some of them even produced well-reviewed winners that should have seen these start ups to the road to success. However, the audiophile market is a niche one and it's apparently quite easy to fail. Unless you are handy with a soldering iron, my advice when purchasing equipment is to buy from established brands that have been around for awhile. This will lead to easier service, possible product updates, and better resale value. Some of the classic brands: Audio Research, Conrad-Johnson, Mark Levinson, KEF, Quad, etc have a long track record and the quality of their gear, plus the resale value shows this.
Vintage Madness:
I love old tube gear and vintage speakers. However, in the world of amplifiers, only a few of the old designs really stand the test of time. These were usually the expensive pieces back then - Marantz, Fishers, the top-level Eicos, Fishers, Dynacos, Grommes, Fairchilds, etc. On the other hand, the more budget integrated and console amplifiers suffer from poorer circuits, cheaper parts, and output iron with less bandwidth and smaller cores. The same holds true with speakers - only some have really held up to the test of time, while the majority of the vintage units sound rolled-off and not very detailed. Sure, these old-timey pieces can sound enjoyable, but they ain't hi-fi.
Separated at Birth:
If you're a simple kind of audiophile who wants the minimal moving parts, then by all means go the integrated or receiver route. Just keep in mind that this path will minimize - unless in/out RCA jacks are included - your upgrade possibilities. Personally I prefer separates - preamplifier and amplifiers - which allows different combinations of gear to be tried. Difficult speakers to drive? A tube preamplifier and a hefty solid-state amplifier might just be the perfect combination.
Budget Talks:
Even if you are silly rich, every stereo system is built around a budget. Things to consider: how much are you willing to pay and how will it match with the rest of your system? I could, with enough bad decisions, put together a fantastically expensive system of Stereophile Class A components that would make any listener run out of the room screaming, For example, couple a low powered singled-ended amplifier with an inefficient speaker with a low 1-ohm impedance curve. Though painful, it's best to start with a good front-end, and then buy and sell up the chain, keeping in mind that a manufacturer's lowest priced product is not always the best place to start. For example it will be better to save to buy a Rega P3 than the entry-level P1.
David and Goliath:
There are giant-killers out there - budget gear that punches above its low price and gives a great listening experience. KEF and Wharfedale speakers easily come to mind, along with some of the cheaper Chinese tube amplifiers. However, no matter what you tell yourself, they still are budget pieces that can be surpassed with something more expensive. It's just a matter of how much you are willing to spend and if you ears really demand that much perfection. I think it's important not to lie to yourself and accept the limitation of your system, which brings me to my final point.
Times are A-Changing:
When buying gear and bring in a new component into the system, it's all too easy to get swept away thinking that the latest change is always for the better. It's also far too easy to think an expensive unit will always surpass a cheaper piece. It would also be wrong to think that newer is always better than older. Again, system matching and careful listening is required here. It's also good to have a few audiophile friends over who don't have an emotional investment in your stereo. If they have experienced ears - and are of an honest nature - they can also tell you what faults they are hearing, instead of just concentrating on the best parts of upgrade.
As always, comments and suggestions are welcome.
Monday, March 25, 2013
Review: Denon DL-110 high-output moving coil
(picture taken from Google Images)
My previous phono cartridge was a Denon DL-103R, the famed 'upgraded' version of the DL-103. Mine had been modified with an aluminum body. Partnered with Cinemag step-up transformers, the DL-103R was a great performer, offering plenty of hi-fi goodies - soundstaging, detail, etc - at a budget price. It really is an excellent low output moving-coil alternative to the more expensive units out there.
Sadly, the cantilever of my DL-103R was accidentally broken when I moved to my new house - don't ask! Since this new place is just temporary and has the misfortune of a smaller listening space where I cannot use the UREI 813A speakers, I instead opted to buy the budget DL-110. Regarding type and specifications, the Denon DL-110 is a high output (1.6mV) moving coil cartridge that can work well into a standard moving magnet phono input. At 4.8g of weight, it's also very light and with some tonearms may require the use of the included metal plate.
Using the VPI HW19 Mark III table with a Rega RB300 arm, I was immediately taken with this cartridge. Though it lacks some of the finer points of the modified DL-103R, it still in no slouch. No immediate shortcoming come to mind, though the midrange is perhaps slightly forward. Bass detail is also good and treble extension was spot on with minimal aggression or roll-off. Detail retrieval - hall ambience, trailing edges - aren't exactly on par with the best I've heard, but once again, any sins were of omission. So all in all, a very good cartridge for the $139 asking price.
I recently purchased a new turntable: a VPI Aries I with a JMW 10.5" tonearm. Since I only had the Denon DL-110 on hand, I was forced to use this cartridge which had a cost some 20X less than the turntable. Due to the light weight of the cartridge body, I as forced to add the included metal plate under the headshell. This was a tricky operation that required much fiddling and curse words.
Even with the upgraded turntable and arm - and much to my surprise - the DL-110 did not fall on its face. For example, Neil Young's "Live at Massey Hall" never sounded so real. Soundstaging was deep and wide and the music - much like the real, live thing - came at you instead of hanging out behind the plane of the speakers. There was a nice shimmer to the slightly forward midrange, while bass was low but still tuneful, giving great response with the small KEF speakers. Treble was very extended with more detail than the old HW19 table. I'm sure I would find more faults with the UREI speakers installed, but at least with this system, the sound was much better than anticipated. Highly recommended for the budget conscious audiophile.!
System
VPI HW19 Mark III with Rega RB300 or VPI Aries with JMW tonearm - both with SDS Power Supply
Denon DL-110
Cardas Quadlink 5C 1M interconnects
Quicksilver preamplifier with Gold Lion 12AX7 re-issues, RCA 12FQ7s, Raytheon black-plate 5814
Cardas Cross 1M interconnects
EICO HF-60 monoblocks with Mullard XF2 EL34s, GE 6SN7GTAs, Genalex CV4085s
Kimber 8PR/4PR 2M bi-wire cable
bi-wired KEF iQ30 with VTI UF29 stands
VTI BL503 equipment rack
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