While Audio by Van Alstine (AVA) may be a new name for many, there’s a good chance you are at least peripherally familiar with Frank Van Alstine’s work. Out of his shop in Minnesota, he spent years developing modifications and upgrades for Dynaco and Hafler equipment—and those kits are still available. For customers wishing to get hands-on with their stereo, the upgrade kits are rumored to take an already-great piece of classic equipment to an entirely new level. For those with the skills and time, these kits can provide their owners some fantastic sound at very reasonable price points.

For the fine-motor-skill-challenged folks like myself, a hot soldering iron and a lot of tiny and delicate electrical parts presents a potentially disastrous combination, and so I prefer to purchase my stereo components from the hands of the true experts. Fortunately for me, Mr. Van Alstine recognizes the many audio fans in my circumstance who are seeking great-sounding equipment without requiring a second mortgage to finance it. Building on the knowledge and insight accumulated over the years, AVA came to life, bringing with it amps, preamps and DACs.

AVA offers both solid-state and tube designs. The company’s website has a chart describing the differences between its preamp designs and the sonic signature of each. With four preamps in the current AVA lineup, I welcomed the opportunity to test its flagship, the Fet Valve CF hybrid preamplifier. Each circuit of our test unit features two 12AT7 tubes supplementing the gain stages and two 12AU7 tubes acting as cathode followers—from which this preamp gets its CF designate. According to AVA, this design represents “the very best we can currently do,” and so it is with high expectations that we at TONE anticipate hearing its sonic virtues.

Customization

AVA sells directly from its website and builds each product at the time of order. The company offers several options for the Fet Valve CF preamp, depending on the user’s needs and preferences. The entry point is the black faceplate model for $1,899. The same preamp with a silver faceplate starts at $2,099. From there, the owner has several upgrades to choose from. For those planning integration into a home theater setup, a bypass switch for the preamp is available for $50, allowing a surround-sound processor’s volume knob to act as master volume for the system. Vinyl fans will appreciate optional RIAA phono circuits, priced at $249. Inverter/bridge circuits and buffered tape output circuits are available for $199 each. And finally, a high-quality remote control with a mute button adds $299. With all the add-ons, a fully loaded Fet Valve CF runs in the neighborhood of $3,000.

Straightforward Setup

From a usage scenario, the Fet Valve CF could not be simpler. The back panel of our test unit offers a phono input, five line inputs, a tape input and output, plus two sets of main outputs. All connections are single-ended RCA.

On the front panel, from left to right, thee rotary knobs control source selection, volume and balance. Above the source knob, which selects from the six line inputs, are two toggle buttons. One offers a choice of stereo or mono playback; the other allows tape monitoring. Above the volume knob, two additional buttons control filter and low gain. According to AVA, these special settings offer the user more control over aggressive speakers and source material. As icing on the cake, the Fet Valve CF includes a 1/4-inch headphone output.

Listening

After several days of burn-in, the Fet Valve CF finally has its chance to sing. Sitting in the listening chair, I reset my mental sonic expectation to where my past experience with $2k preamps has placed it. There’s very good gear in this price range, but much of it requires some sonic tradeoff. The play button starts the music as expected, and surprisingly, it also activates my “mouth ajar” setting. The Fet Valve CF certainly offers a great first impression.

I use the term hybrid for this amp, which refers to both its sonics and its design. While the marvelous, fluid tube midrange is there, some of the downsides associated with older tube designs, like limited bass punch and definition, do not follow suit. In fact, the Fet Valve CF creates bass that’s quite deep and noticeable right out the gate.

While instruments and vocals retain a high degree of realism, there’s also a forgiving nature to the preamp’s sonic signature. Rendered digitally, some female vocal recordings, like Amy Winehouse’s Back to Black, retain a bit of grain and edge. Through this preamp’s lens, the excitement of the performance remains, while reducing these unwanted artifacts and retaining the underlying emotion of the original recording.

Saxophones and trumpets have an inherent potential for sonic sharpness. Recorded well, the sound captured from these instruments is one of incredible, live detail, but with some lesser-quality jazz recordings, a transparent window to untamed digital harshness can impart the listening experience with some unpleasantness. Striking an interesting balance, the Fet Valve CF places strident instruments in a slightly warmer light—which is not to say that the preamp creates an artificially sugary sound; to my ears, the sound remains generally neutral. Rather, it makes the best of what it’s given. Using the pass and filter toggles described earlier, the listener retains greater sonic control than most hi-fi preamps allow.

Music portrayed through the Fet Valve CF may not have the lush and nuanced refinement I’ve heard with more expensive gear, but this preamp certainly has a way of making lemonade from lemons. In addition to accurately conveying the woodiness of string instruments, the Fet Valve CF also offers a compelling representation of percussive instruments. Cymbals have the expected shimmer after a strike; snares retain the requisite rattle; triangles and tambourines have the ring they should. In general, this preamp retains symphonic music’s high degree of naturalness.

Compared with much more expensive reference gear, the Fet Valve CF creates a leanness to the sound. While it does a very good job reproducing both frequency extremes, it does have a somewhat reduced degree of richness and fullness by comparison. In orchestral pieces, the ambience of the performance hall is diminished. I also find that the width and depth of the stereo image through the Fet Valve CF is truncated. The music does not extend much beyond the left and right speaker limits. This preamp also struggles to project sound into the perceived space behind the speakers, although I will say that vocals never get recessed into the mix.

Despite these limitations, the sonic elements that reveal themselves between the speakers remain well separated and quite convincing. If forced to make a tradeoff, I’d prefer the Fet Valve CF’s large and realistically rendered sonic image—one that’s akin to stepping back several rows in a live performance—to having an artificially bloated image increasing the apparent size of vocalists or instruments. After getting used to the Fet Valve CF’s portrayal, I decide that it doesn’t reduce the enjoyment of the performance; it just puts a different lens on it.

Like the rest of the Fet Valve CF, the phonostage offers a fantastic price-to-performance ratio. While the sonic attributes described earlier remain generally consistent regardless of source, vinyl albums do take on a more relaxed musical presence though this preamp than their digital counterparts do. Considering the phono section is a mere $250 upgrade option, it’s an absolute steal. Even if you don’t have a turntable now, you might later!

Conclusions

Reviewing equipment involves critiquing the nuances of the musical presentation to determine strengths and weaknesses. But when that analysis is complete, it’s equally important to take a step back and listen to the music, not just the equipment. Does that piece of gear allow the listener to get pulled into the sound and forget the hi-fi behind it? With the Fet Valve CF, the answer is an unequivocal yes.

This preamp is one of those pieces of budget gear that excels on many, many levels. While much more expensive preamps residing in my test system may exceed the Fet Valve CF’s capability in various ways, this preamp never fails to provide musical fulfillment that exceeds expectations for its price point. It’s not perfect, but it’s also not saddled with any major compromises.

For those looking to build a home hi-fi system in the $8,000-to-$10,000 range, the AVA Fet Valve CF preamp can serve very well as an anchor component. Depending on the options chosen, $2,000 to 3,000 delivers great sound, leaving the rest of the budget for speakers, amp and sources that complement it. Do yourself a favor and keep this preamp in mind—it might just be the solution you are looking for.

Additional Listening

By Jeff Dorgay

Not quite old enough to have purchased tubed Dynaco gear new, I did spend a fair amount of time growing up with it—and I remember when Van Alstine came on the scene, offering updates that took this modest gear to killer levels. Frank has definitely taken everything further over the years, and he’s done so while keeping the costs in line.

If I had to describe Van Alstine gear in one word, it would be honest. This is well-made gear that delivers honest performance without frills. When I mate the Fet Valve CF to the Van Alstine Ultravalve vacuum tube amplifier, the synergy is fantastic, as you might expect. Using the two together with a handful of speakers, I don’t find the smallish soundstage that Jerold experienced to be an issue; it may have been system synergy. With the Fet Valve CF, everything from AVA’s own amplifier to a few examples from Pass Labs, Simaudio, Octave, and Audio Research all reveal the same big soundstage.

Van Alstine offers a 30-day trial on all of its gear, so you’ve got nothing to lose. I suspect precious few of these get sent back. This preamplifier is a proud addition to my list of Publisher’s Choice Awards for 2013.

Audio by Van Alstine Fet Valve CF Vacuum Tube Preamplifier

MSRP: Starting at $1,899

avahifi.com

With the burgeoning number of adults working from home, the office-audio category has become an industry bright spot.  Filling this space is Blue Aura’s $549 v30 Blackline music system, which satisfies the craving for vacuum tubes and matching speakers, and does so in a space-conscious package.

The handsome, three-piece system looks sharp wherever I place it in my office—I tried both my bookshelf and credenza—but the system’s striking aesthetics never dominate the décor.  Los Angeles–based Blue Aura wraps the speakers and the body of the amp in black faux-leather, and accents the amp with chrome trimmings.

The amp is 10 inches wide, 7.5 inches deep and 5.5 inches tall, and the plated handles on either side of it double nicely as bookends.  Adorning the front panel is a pair of matching chrome knobs—one for adjusting the volume and one for selecting from the three inputs (USB, LINE, and AUX).  Two 6N1 tubes flank the taller 6e2 tube, with its decorative but unnecessary green glowing light filter.  A four-post tube guard with a plexiglass-and-chrome top shelf protects the tubes from inadvertent fingers or the common office mishap.  On the back panel, from left to right, are three inputs (RCA, mini-headphone, and mini-USB B), followed by a mini-headphone output jack, four brass speaker jacks, the power-cord socket and power switch.

The 5.5-inch tall speakers look similar to the Audioengine A2s, with forward-facing slits towards the bottom of each speaker serving as bass ports.  The 3/4-inch tweeter and 3.5-inch paper driver surprised me from the outset with some obvious low-frequency grunt and detail.  With the speakers set on their over-sized-hockey-puck stands and with the bookcase as an additional cabinet, the sexy, sultry vocals of Sade fill my 11-by-10-foot office.  Changing out the included 18-gauge speaker wire for some 12-gauge wire further defineds the speaker’s impressive resolution.

Dishing It Out

Forget the typical tinny computer sound and irritating fake subwoofer output—the v30 avoids that pitfall.  This is a setup I find enjoyable listening to for several hours, which helps me grade papers without becoming restless.  When playing rounded sharp-edged recordings, such as Donald Fagan’s Kamakiriad, the v30 settles down nicely.  I then play some lossless recordings, with my laptop and Audioengine D2 wireless DAC system on my desk and the v30 on the bookcase, and intoxicating sound fills the office.  Even with the speakers just 30 inches apart, the system offers impressive instrument placement.

It’s obvious that the Blue Aura engineers understood that the typical home-office setup limits how far apart speakers can be placed.  The result is a nice, expansive soundstage and subsequent enjoyable listening experience.  Even stepping down to my MacBook’s analog output and running a wire to the v30 yields worthwhile results.

The system excels at reproducing jazz music, and quickly makes Vince Guaraldi’s classic Charlie Brown Christmas a playlist favorite.  The v30’s ability to recreate the individual bass notes in “O Tannenbaum” bests the budget bookshelf speakers that normally occupy my office—and those are more than three times the size of the v30’s speakers.  Guaraldi’s piano matches the glow that the three tubes adds to the keystrokes.  The slight loss in absolute detail is easily made up by the system’s warmth and rich decay.

As the days pass, the v30 becomes the reason to listen to music, the goal being to see what it can handle musically.  While blasting Slayer at house-party levels isn’t realistic, the unit has no problem getting into the 90-plus-dB range before hitting its sonic wall.  It delivers more complex rock with ease.  John Mellencamp’s Lonesome Jubilee, with its multitude of instruments, sounds open and uncongested—a neat trick for such a diminutive setup.

As expected, the v30’s three glowing tubes make the midrange beguiling.  Female vocals and instruments are lush and warm, and void of the syrupy slow quality that creeps into many budget tube systems.  In this price range, the v30 is downright first-rate, especially in the level of clarity it brings to Pink Martini’s “Mar Desconocido,” with its tempo-leading bongos, and to the plucked guitar and xylophone in the next track, “Taya Tan.”

Just For Fun

One Sunday afternoon, I pair the 20-wpc integrated amplifier with the 92-dB-efficient Verity Audio Finns.  The v30 does itself proud here, powering the Finns with confidence.  Though the amplifier section won’t make one forget PrimaLuna’s resolution, particularly in the higher register, it does move some serious air, representing the basics of tone and balance remarkably well.

Even in larger spaces, such as my 13-by-19-foot family room, the v30 delivers open sound.  With the amp and speakers on the rock fireplace hearth with the angled puck speaker stands tilted upward, the room fills with warm holiday sounds.  Even with the sliding door to the kitchen closed, I was still able to enjoy the details emanating from the system.

For those that desire tunes but need focus on work in their office, the musicality of the v30 Blackline make it a top-tier choice for the home office.  Looking to add a source wirelessly? Just add Blue Aura’s WSTxR wireless transmitter/receiver kit for $149.

www.blueaura-audio.com

The finger snaps on Thomas Dolby’s “The Ability to Swing” hang in midair between the speakers, as Dolby’s highly processed yet ethereal vocal enters the mix.  “It isn’t worth a bean, if you haven’t got the ability to swing,” he declares.

Indeed, the six-figure system assembled in room two is in full swing right now, but the amplifier powering the Sonus faber Guarneri Evolution speakers is the humble AVA Ultravalve, not the $65,000 Octave Jubilee monoblocks I’ve been using for some time.  This is truly an amazing amplifier.  If I powder-coated the chassis a certain shade of blue-green, slapped an Air Tight badge on the front panel and told you I paid five figures for this little jewel, you’d believe me—it’s that good.

With so much excitement about the vinyl resurgence of the last few years, some of you have forgotten how popular vacuum tubes have also become lately.  Yet, in the midst of these newer products sprouting up, it’s easy to forget some of the players that have been around for quite a while.  Audio by Van Alstine (AVA) is that “other” amplifier company in Minnesota—Audio Research is located nearby—and it is a perfect example of a manufacturer that has quietly gone about its business making great products without a ton of fanfare.  And you rarely see products from AVA for sale on the secondary market.  The company obviously has a legion of loyal customers,

No matter how much time I spend with mega-dollar power amplifiers, I always love a variation on the Dynaco Stereo 70 theme.  While I’ve never heard one that I didn’t like, there are big differences between them.  Some have a softer, warmer presentation and definitely embellish more than others; the original ST 70 is the prime example of that voicing.  With these types of amps, your best recordings don’t sound much better than your worst, but everything sounds somewhat liquid and dreamy—not a bad place to hang your hat if you have a modest system, or a lot of MP3s.

Tube Through and Through

Frank Van Alstine has been at this game for a long time.  He started out modding and repairing Dynaco electronics 30-plus years ago, and revamped the ST 70 circuit so much over the years that it is now truly his own design now.  The Ultravalve is still based on a pair of 6CA7 output tubes (EL34 or KT77 tubes can be used as well), but it does not have a switch for triode mode, fancy power output meters or anything that distracts from the amplifier’s performance.  And its price is right: $1,999 puts one in your hot little hands.

Like the original ST 70, the Ultravalve uses a 5AR4 rectifier tube and a pair of more readily available 6GH8A small-signal tubes in place of the now long-obsolete 7199 tubes in the ST 70, which is fetching premium prices online.  The Ultravalve is one of the first power amplifiers I’ve listened to with which I just don’t feel the need to roll tubes.  It sounds just fine as is, and a little bit of research shows that there aren’t a lot of variations on the 6GH8A tube anyway.  Perusing Mr. Van Alstine’s board on the AudioCircle forum shows him to be a practical man, so I just enjoyed the amp’s stock tubes.

I do upgrade the power cord to a Cardas Clear cord for my review, only because that’s what I use with everything else and we value consistency here.  The Ultravalve does benefit slightly from the upgraded power cord and from being plugged into a Running Springs Dmitri power conditioner.  But keep in mind that none of this is necessary to enjoy the Ultravalve.

Removing the bottom panel of the highly polished stainless steel chassis reveals tidy workmanship throughout, again showing that AVA sticks to the basic layout of a ST 70: driver circuitry on a well-thought-out PC board and the rest of the amplifier wired point to point.  There is a switch on the rear panel to float the ground, as well as three binding posts for 4-, 8- and 16-ohm speakers; this is my only gripe with the Ultravalve.  It really could use some beefier binding posts for those of us with bigger speaker cables.  My solution is just to re-terminate with bananas plugs.

Ace of Bass and Dynamics

Bass control is a big part of the equation here.  The original ST 70 has a puny power supply and it shows up in the playback, with the bass response lacking dynamics and sounding wild and wooly.  An original Conrad-Johnson MV50 isn’t much better.  An original Marantz 8B has a more liquid midrange but still falls short down under.

As brilliant as the Sonus faber Guareri Evolution speakers are, like any high-performance Italian product, they are a bit picky about what you feed them.  Just like my Fiat Abarth getting grumpy when filled with anything less than premium gas, the Evos need current and control to give a stellar performance and sound as big as they should.

And when delivering Nine Inch Nails’ “Help Me I Am in Hell,” the Ultravalve sounds big. I move the amp out into room one, with the KEF Blades (with their 90-dB-per-watt sensitivity), and it sounds damn big, with guitars floating around the soundstage and the heartbeat at the end of the track filling the listening room.  Upping the game with a much more densely recorded track, “Mr. Self Destruct” from NIN’s album The Downward Spiral, I find that the Ultravalve not only keeps the groove of the driving synth bass well intact, but it also does not lose the focus.  The amp starts and stops on a dime as Trent Reznor brings the music to barely a whisper, only to audibly assault us again and again with a huge ball of sound and dynamics.

It’s still hard to believe I’m listening to a $2,000 amplifier.  For those of you in the audience thinking that it’s sheer insanity to put an amplifier like this in a system like this, I submit that it’s the only way to see what its performance envelope truly is.  Daft Punk’s Homework lights up the Blades and I can turn the volume up to the point where I feel like I’m back in New York at Fashion Week.  All that’s missing is the catwalk.

The Ultravalve carefully follows Stanley Clarke as he rips up the fretboard on “Bass Folk Song No. 7,” clearly demonstrating its ability to keep the Blade’s 9-inch woofers in control.  The amp reveals Clarke’s delicate touch on the fretless bass, and it never gets sloppy, slow or wooly.

It’s also Got Top

The Ultravalve is ultra quick, even when playing a less-than-superb recording, like The Stooges self-titled album, on which the amp keeps its composure, provided you don’t turn the volume past the point of soft clipping.  Rather than getting harsh, like many other low-powered tube amplifiers we’ve auditioned, the Ultravalve begins to suffer from a collapsed soundstage.  This degradation is slow at first, but the amp then quickly slides into the same flat, brick-walled sound that plagues many of today’s digital recordings.  But if you keep the Ultravalve within its comfort zone, you’ll be handsomely rewarded.

Miles Davis’ “Diane,” from Steamin’ with The Miles Davis Quintet, proves open and spacious, with Philly Joe Jones’ brushwork on the drums exquisitely rendered, as Davis floats through the soundstage.  This amplifier becomes more convincing the longer you listen; about an hour is required for it to open up completely, but it is still damn good two minutes after initial turn on.

Perhaps the only stretch for the Ultravalve while paired with less than highly efficient speakers comes when asking it to reproduce large-scale orchestral pieces or electronica at club levels.  Prokofiev’s suite from The Love for Three Oranges taxes the Ultravalve as the large kettle drums reach full throttle, requiring listening at less than what might be considered a live level—but how often do you do that?

Back to Earth

Using the Ultravalve with similarly priced components is highly rewarding.  It is fully capable of anchoring a modestly priced but high-performance system.  Mating the amp to a Conrad-Johnson PV-12 preamplifier (with CJ’s recent capacitor updates), an Oppo BDP-105 universal player and the Rega RP6 turntable, with a pair of KEF LS50 speakers, proves breathtaking—especially for a relatively inexpensive system like this one.  But you’ll be surprised just how damn good the Ultravavle sounds as part of a no-holds-barred system.

While the 35 watts per channel of the Ultravalve may not be enough juice for everyone, if that much wattage will work for you, I cannot recommend this amp highly enough.  The level of resolution, tonality and bass control this amplifier offers for $1,999 is unmatched by anything I’ve ever experienced at this price point.  I am very proud to award the Ultravalve one of our Exceptional Value Awards for 2013.  I’m keeping this one!

AVA Ultravalve Vacuum Tube Amplifier

MSRP: $1,999

Audio by Van Alstine (AVA)

www.avahifi.com

Peripherals

Analog Source	SME 10 turntable    Sumiko Palo Santos cartridge    Aesthetix Rhea phonostage
Digital Source	dCS Vivaldi stack    Oppo BDP-105
Preamplifier	Conrad-Johnson PV-12c1    Nagra Jazz    Robert Koda K-10
Speakers	Dynaudio Confidence C1    KEF LS50    KEF Blade    GamuT S9    Sonus faber Guarneri Evolution
Cable	Cardas Clear

We were so impressed with the Monk-Audio three input phonostage that we’ve made it part of our permanent reference collection.

Their latest effort, labeled the “tube preampli-le petit, still features three inputs, though this time utilizes a pair of 12AX7 tubes instead of the solid-state construction of their larger model.  Gone is the ability to adjust gain, loading and EQ, but the pricetag is very attractive – about $1,300. With the cost of the EAR 834P ever increasing, this could very well be its replacement.

Initial listening with a Denon DL-103r cartridge mounted on an SME 309 tonearm with the AVID Ingenium turntable reveals, a lively, dynamic sound with a very low noise floor.  In the weeks to come, we’ll be trying a handful of MM and MC cartridges, and report back with a full review.

Stay tuned!

Throughout his career, Bob Carver has made several legendary products and, like most great artists, stirred up controversy in the process. His new line of tube amplifiers aren’t just brilliant, they’re reasonably priced. For those wanting the “Made in America” badge, these crimson beauties—along with every other Carver amplifier—are built by hand in Lexington, using point-to-point wiring techniques.

The VTA180M features a simple and honest design. Its basic, open chassis configuration adds to the vintage feel and keeps costs manageable. You won’t mistake these units for a pair of megabuck tube amps machined from solid billets of aluminum. Well, not until you turn them on. Then, be prepared to be pleasantly surprised.

Having sampled many great tube amplifiers over the last few years, I was immediately impressed by the VTA180M’s level of detail and grunt provided by the 200 watts-per-channel reserve. Vide, Bombay Dub Orchestra’s 3 Cities. This record serves up big, synth-bass beats that challenge any amplifier driving full-range speakers. The Carvers reward my GamuT S9s (that have a -3db point of 17hz) with solid, texture-laden bass and subterranean extension.

They also require little warm-up time. With just a half hour on the clock, the amps piqued my interest when playing Chemical Brothers’ “Galvanize” from Push The Button. The assault of bombastic bass waves encouraged me to twist the volume control to nightclub-like levels. As the GamuT S9s’ six 11.5-inch woofers pumped, I felt like the guy in the Maxell chair, with the system moving major air sans strain or distortion. The amps sound enticing even after the first five minutes, but require 45 minutes to thermally stabilize and reach full bloom. Once there, an enormous, three-dimensional soundfield awaits. Vacuum-tube newbies will experience an entirely different sonic landscape.

Midrange Options

Reach-out-and-touch-it midrange is almost always a given with tube amps; the extra airiness draws music lovers to vacuum tubes. The VTA180M lets you pick a preferred presentation, offering two feedback settings: 11db (contemporary amplifier) and 20db (classic amplifier) that affect the upper bass/midrange presentation. According to the concise instruction manual, Carver leans toward the classic setting, and it’s nice to have the option. Plus, you can switch the setting on the fly without suffering any annoying or potentially harmful pops.

The extra feedback provides a warmer, more saturated sound, much like many beloved vintage tube amplifiers. Meanwhile, the 11db setting possesses a punchier sound and tighter bass response. It’s also great for fine-tuning an amplifier to speakers. So, even if your taste in speakers changes, your amplifier can remain in the system. This is a great way of making the VTA180Ms obsolete-proof. One note: Should you have a pair of speakers that already have a bump in the upper-bass/lower-midrange region, a romantic-sounding tube amplifier can be too much.

In addition, you can use the feedback switch as a tone control. Regardless of your system’s overall tonal balance, if you listen to a fair amount of MP3s via MOG, Spotify, or another online service, extra tonal warmth supplied by the VTA180M in the classic amplifier mode goes a long way towards making harsh digital sources more listenable.

For Those About to Roll

Tube rolling with the VTA180M is effortless. Its open casework allows easy access. The stock tubes sound awfully good, so your degree of OCD will determine whether they constitute the equivalent of a quick jaunt down the bunny hill or a Double Black Diamond run. Should you swap them out, you will need a dozen power tubes—not for the faint of checkbook. A set of Gold Lion reissued KT-88s imparts a less grainy feel, and sacrifices nothing in the top and bottom ends of the frequency spectrum. Just be sure to check the front-panel bias meter and adjust accordingly when fitting a different set of output tubes. Again, the Carver manual goes into great detail explaining the process and makes it all simple.

Experimenting with the 12AX7 input and the 12AT7 pre-driver tubes offers a wider range of tonal change than fiddling with the output tubes. With only one of each tube per monoblock, it’s a basic exercise. While NOS 12AX7s can soar as high as $300 each (for super high-zoot Mullards and Telefunkens), Mullard 12AT7s rarely top $30.  The 12AX7 is the tonemeister: Changing it affects overall tonality as much if not more than the feedback switch. Or, you can just leave the VTA180M stock and enjoy as is. Or can you? Decisions aside, Carver offers an impressive one-year warranty on the factory tube set and seven-year warranty on the amplifier.

The Whole Enchilada

Tube amplifiers live and die on the top and bottom of the audio spectrum. Some offer a dreamy, creamy, albeit slightly rounded off high-frequency response, a trait especially attractive to digital music collections. Other units put forward a very refined, extended, clinical sound that gets so close to the character of solid-state gear, one ponders why valves were ever chosen.

The VTA180Ms provide excellent overall tonal balance, regardless of feedback setting. Low-end extension is particularly healthy. Tube amplifiers rarely possess great bass texture, yet the VTA180M excels in this region. Tom Petersson’s bass on Cheap Trick’s self-titled album enjoys alluring growl. The opening bass riff on “Mandocello” bites and feels natural. As his hand slides up the instrument’s neck, it sounds like you’re standing in the front row of a small venue peering right at a big Ampeg bass cabinet. A similar experience occurs with an early British pressing of the Beatles’ Revolver. Even at high volume, Paul McCartney’s bass line stays solid and easy to follow, with plenty of definition.

Things are equally good up top. Without surrendering any tonal saturation, the VTA180M provides a clean, resolute high end. Cymbals are portrayed with plenty of air and texture, feeling neither rolled off nor exaggerated. Switching back to a few vintage amplifiers on hand from Dynaco and Marantz reveals similar tonal saturation, but to the point of obvious coloration and grain, particularly when listening to Joe Sample and Co. on The Three, an incredibly well-recorded direct-to-disc LP. Shelly Manne’s drumming loses the air present via the Carver, through which the percussion sounds like real cymbals.

When spinning Revolver, the background handclaps in “And Your Bird Can Sing” are not as prominent as it is with the best amplifiers at my disposal. This slight loss of ultimate low-level resolution, in comparison to that delivered by big-dollar gear, is the VTA180M’s only apparent weakness. But these cherry-red monoblocks do everything else so well, you won’t notice it.

The VTA180Ms feature a single-ended RCA input and work flawlessly with the handful of on-hand preamplifiers from Audio Research, Conrad Johnson, Burmester, McIntosh, and the new Coffman Labs model currently under review. Thanks to 2-, 4- and 8-ohm output taps, the Carvers show no problem driving the MartinLogan Montis speakers and even produce enough juice to drive the Magnepan 1.7s to fairly high levels.  If you are nervous that the rated 230 watts-per-channel isn’t enough for your Magnepans, Carver’s VTA305M monoblocks should get you there.

Award Winning Performance

I am very excited about the VTA180M amplifiers. Designed by a legend, they offer a no-nonsense approach, with money spent in the right places. We could talk in circles about parts and topology choices, sure. But in the end, these amplifiers do everything well, volunteering a sensory experience that normally commands a higher price.

Indeed, this is a tube lover’s pair of amplifiers. They provide more than enough power to drive all but the most inefficient speakers, and boast an extraordinary level of refinement. The ability to drive low-impedance loads, as well as the option to change feedback and alter the amps’ character to suit personal tastes, are bonuses.

If there’s a better pair of 200-watt-per-channel tube amplifiers out there for this kind of money, I haven’t heard them yet. The Carver VTA180M monobocks richly deserve an Exceptional Value Award for 2012.

Carver VTA180M Monoblock Power Amplifiers

MSRP: $7,400/pair

www.bobcarver.com

Peripherals

Analog Source             AVID Acutus Reference SP/TriPlanar/Lyra Atlas

Digital Source              dCS Paganini 4-box stack, Sooloos Control 15

Phonostage                  Audio Research REF Phono 2SE

Speakers                      GamuT S9

Cable                           Cardas Clear

Accessories                 Furutech DeMag, DeStat, Audio Desk Systeme RCM