Whenever I’m asked to suggest a CD player that’s warm, romantic, and “anti-digital,” I always recommend a player with a vacuum-tube output stage. I nominate the same player TONEAudio contributors Bob Gendron and Jerold O’Brien use—the PrimaLuna ProLogue 8, now labeled the Classic. It takes the harsh, digital sting out of CDs. Sure, some digital players are more accurate and refined. But if you are a hardcore analog nut, many end up sounding thin in comparison. PrimaLuna recently took its vacuum-tube digital disc player a step further with the improved Premium.

For those not familiar with the name, PrimaLuna has been in business for more than a decade and boasts a fantastic reputation for sonics, build quality, and wonderful fusion of old-school and modern aesthetics. Available with satin black or silver faceplates, the new player’s chassis is covered in a deep metallic-blue finish that’s hand-polished to display a mirror finish—a PrimaLuna hallmark.

My only complaint with the Classic? It lacks a digital input. But PrimaLuna addresses this and more with the Premium. To its credit, the company has not simply tacked a vacuum-tube buffer onto the end of a traditional CD player to soften things up. All the gain stages utilize vacuum tubes, and the Premium is the only player we’ve seen that uses a tube for the clock circuit, as well.

Arguments about system synergy and tonal coloration aside, the approach works well, and in much the same way an analog enthusiast would choose a Grado Statement or Koetsu Urushi phono cartridge over a Lyra Titan i or Ortofon Winfield. It’s not better or worse, but it’s a specific flavor, and if it’s the one you crave, nothing else will do.

Beginning listening sessions with discs on the harsh side of the spectrum, it takes only a few minutes to see the brilliance of this approach. No, the Premium still can’t make the brightest CD ever made, Stevie Wonder’s In Square Circle, sound like an LP, but everything else on my toxic list becomes considerably more palatable. Tinkly percussion bits in “Thunder,” from Prince’s Diamonds and Pearls, float around the soundstage as they should, with the electronic drums now slightly subdued, and making all the difference in the world.

While I won’t define what this instrument produces as a tone control, it is a different set of tonal values, and even on the best CDs, an enjoyable presentation. For those new to TONEAudio, my listening bias favors an overall tonal balance just a touch on the warm side of neutral. So if you possess canine hearing and want a system than can remove wallpaper from the walls, you know where I stand.

New Versus Old

Costing $1,000 more than the Classic, the Premium adds a larger, dual mono power supply, upgraded active and passive parts, and a different analog stage featuring four 12AU7 tubes (the original uses a pair of 12AX7s and a pair of 12AU7s). The dual 5AR4 rectifiers are retained to excellent effect. One of the biggest improvements arrives via the incorporation of a second Super Tube Clock, further reducing jitter and increasing low-level resolution.

Borrowing O’Brien’s Classic for a side-by-side comparison proves illuminating. Where the original player sounds more like a Dynaco Stereo 70, i.e. “classic tube sound,” the Premium sounds more like a more modern tube amplifier; think BAT or ARC. It still possesses a wonderful and tubey midrange, but also more extension at the top and bottom end of the frequency range, and more inner detail and punchier dynamics.

Brian Eno’s latest work, Lux, illustrates the aforementioned characteristics.  Another of his ambient works, reminiscent of Tuesday Afternoon, the composition rolls along gently with bell-like keyboard sounds that ease in and out of consciousness. Where the Classic cuts the decay short, the music lingers longer and fades further out before going to black via the Premium. A similar experience manifests on the title track of Jack White’s current Blunderbuss, with the newer player doing a better job at keeping sorted individual elements in a mix. Every disc I play with a relatively dense mix yields the same scintillating results.

Long-Term Pleasure

The Premium never gets on your nerves and proves great for extended listening. The vacuum tubes also make it easy to tune the sound. Stock PrimaLuna tubes will be fine for most, but with a plethora of vintage 12AU7s on the market (and at significantly less cost than 12AX7s), one can tube-roll to infinity. Scour the Internet, or brainstorm with Kevin Deal at Upscale Audio, PrimaLuna’s importer, to enjoy different perspectives on the player when the mood strikes.

Full-day listening sessions are free of fatigue and, on more than one occasion, I’m lulled into thinking that I’m not listening to digital. Comparing the Premium to my Linn LP-12 turntable, I wasn’t disappointed in the least. Switching back and forth between CD and vinyl versions of the Tubes’ What Do You Want From Live? surprises me, with critical cues like audience claps and hall ambience nearly identical in texture and rendition.

A wide range of source material reveals no obvious shortcomings, although the slight warmth added by the all-tube design lends something special to rock and solo vocals. The grungy guitars of Mick Ronson and Ian Hunter on the classic “All the Young Dudes” overflows with texture and overtone, sounding like a pair of Marshall stacks right here in the listening room, with their Celestion drivers flapping at maximum excursion. Cat Power’s “Manhattan” is equally enthralling, her wispy vocals hovering just above the main mix—another example of a modern disc sounding better than it ought to.

One Input Makes All the Difference

When PrimaLuna introduced its first CD player about three years ago, computers were not the ubiquitous music sources they are today, and the company’s players had a closed architecture. The Premium’s USB input allows for a computer to be directly plugged in and utilizes an M2Tech HiFace USB/SPDIF converter internally, a touch that tremendously increases the player’s value.

Feeding high-resolution files into the Premium’s USB reveals the DAC’s merits.  The bass riffs in Charlie Haden’s The Private Collection instantly disclose the advantage of extra resolution from the HD download versus the excellently recorded CD. Texture abounds, and the player sounds more neutral when playing high-resolution files, with the slight bit of upper-bass warmth fading further into the background.

Comparison listening puts music played from the tray on equal footing with the same 16/44.1 files played via USB input. Still, high-res files via the server gain the edge in clarity and dynamics. All digital files are upsampled via a Burr Brown SRC4192 24bit/192kHz upsampling circuit and converted to analog via Burr Brown PCM1792 DACs. While some audiophiles condemn upsampling, it works splendidly here.

Ticking the remaining boxes

Since it’s a tube player, the Premium takes about an hour to stabilize. It sounds a bit slow with some upper bass bloat for the first 15 minutes, but within an hour, the issue completely dissipates. The Premium comes triple-boxed and includes a tube cage and pair of white gloves to keep the player’s smooth finish free of fingerprints—or provide amusement when you play Thriller. The posh aluminum remote also controls any PrimaLuna preamplifier or integrated amplifier, keeping room clutter to a minimum. But don’t lose it. You can’t access the USB input or change phase without it.

I appreciate that the Premium only has a 2-volt output from its RCA jacks (instead of the more common 4-volt output), allowing the average linestage to stay in the sweet spot of its operating range and offer a wider range of volume adjustment.

No, PrimaLuna’s strategy isn’t for everyone. Detail fanatics demanding razor-sharp leading edges on transients might be better served by a solid-state player. But if digital still leaves you cold after all these years, and you’re wondering why you still aren’t enjoying your CD collection (or digital files) as much as you should, give the ProLogue Premium CD player a spin.

PrimaLuna Premium CD Player

MSRP: $3,999

www.primaluna.usa.com

Peripherals

Preamplifier	ARC REF 5SE
Power Amplifier	Pass Labs XA200.5 monoblocks
Additional Digital Source	Mac Book Pro/Pure Music
Speakers	Sonus Faber Aida
Cable	Cardas Clear

So what exactly makes this a premium PrimaLuna product?  Like all products from the Dutch brand, the ProLogue Premium Premium Stereo Power Amplifier has a certain aesthetic appeal: a gunmetal-colored finish, which wouldn’t be out of place on an AMG Mercedes, set off by an anodized-aluminum faceplate (available in silver or black).  Also like the rest of the company’s lineup, the ProLogue Premium stereo amp offers serious levels of performance—this is where the amp’s premium designate becomes apparent.

Popping off the bottom cover reveals ceramic tube sockets and Nichicon and Solen capacitors flanked by premium resistors, along with newly designed output and power transformers.  Wiring is all point-to point and meticulously done by hand, which is one of the reasons PrimaLuna amps have earned such a high reputation for their reliability.  All this precision comes wrapped in a somewhat compact package that weighs nearly 50 pounds, and has an MSRP of $2,299.

Hassle-Free Tube Power

PrimaLuna amplifiers have long been known for their Adaptive AutoBias circuitry, a PrimaLuna trademark that makes traditional tube biasing a thing of the past.  This design allows a wide range of tubes to be used in the output sockets:  KT88 or EL34 tubes work equally well—every ProLogue Premium Series amplifier comes with either set of tubes installed.  (The KT88s produce 36 watts per channel; the EL34s produce 35 watts per channel.)  The new premium version of the amp adds a switch on the side of the chassis, allowing you to optimize the amplifier to your choice of tubes, in order to achieve the lowest possible levels of noise and distortion.

I’m immediately struck by the lively sonic response that the ProLogue provides, with a quick, organic and natural sound that spans all frequency ranges.  This amplifier always feels ready and able to take on whatever you can throw at it—which is exactly what I did.  The ProLogue Premium eliminates the hassle of owning a vacuum-tube-powered amplifier.  It even has a PTP circuit (for Power Transformer Protection) that will protect the amp’s output transformers, should you have an accidental, catastrophic tube failure, which can happen with today’s tubes.

PrimaLuna has updated the front-end circuitry for this amp, which now uses 12AU7 tubes instead of the 12AX7s in the company’s earlier amplifiers.  The inveterate tweak-geek in me could not resist fooling with those 12AU7s, even though the amp sounds great with stock tubes.  New old stock GE tubes render a smoother top-end response, but offer a different listening perspective, as if I had moved back about five rows in the orchestra.  Next, a set of RCA clear tops (with side getters, for the tubeophiles in the audience) provides a big jump in frequency extension, as well as more transparency and a more palpable midrange.  Best of all, Kevin Deal, the owner of Upscale Audio (and the PrimaLuna importer) has a massive cache of these tubes in stock, so you can experiment at will; the 12AU7s aren’t nearly the cost of the 12AX7s. When asked, Deal said that he has “over 10,000 rare and NOS 12AU7s.”

Be aware, I achieved these results with my system; so don’t take them as an absolute, as results will vary on other systems.  But that’s the fun of an amplifier like this:  You can experiment as much or as little as you want—and we haven’t even talked about swapping output tubes.  Don’t forget to save those stock tubes just in case you find yourself lost in the vacuum-tube jungle.

Love at First Listen

Brian Bromberg’s closely miked contrabass in “The Saga of Harrison Crabfeathers,” from his Wood album, instantly confirms the level of full-bodied bass definition the ProLogue Premium provides.  In addition to the solid low-end response, you can clearly hear the creaking and groaning of the instrument, as well as the strings being plucked and slapped on the fretboard.  I’ve never heard this kind of resolution from a vintage Dynaco Stereo 70 (or modded variation on the theme).

Muddy Waters’ album Folk Singer proves a perfect midrange showcase for this amp, which places Waters’ voice firmly at center stage, while simultaneously revealing the ambience in the recording studio present on this intimate performance.  Perhaps the best showcase of any tube amplifier is its ability to convey the sultriness of the female voice, which is another test that the ProLogue Premium passes handily.  I listen to the entire disc of Renée Fleming’s Haunted Heart without pause.  The track “When Did You Leave Heaven?” gives Fleming and the accompanying guitar, courtesy of Bill Frisell, plenty of space without missing a lick of subtlety.

And Secondly

It’s usually a given that vacuum-tube amplifiers excel at revealing low-level detail and vocal tonality, but the ProLogue Premium performs equally well with larger-scale music.  Nelson Riddle’s Nice ‘n’ Easy: The Music of Nelson Riddle is a classic big-band record full of massed horns, which the ProLogue Premium sails through, keeping the horns sorted without becoming harsh or buried in the mix—impressive.

The acid test comes via the Minutemen’s “One Reporter’s Opinion,” from the Double Nickels on the Dime disc.  D. Boon’s AK-47-style guitar playing is present in all its force, Mike Watt’s fluid bass is easy to follow and drummer George Hurley’s seems to punch a hole in my forehead—the PrimaLuna delivers all of this while giving the track the precision and grit on the scale it deserves.  No matter how complex the musical selections, this amplifier does an excellent job keeping pace.

I’m a Fan!

I’m taken with this little but heavy amplifier, and can see why our publisher has been an advocate of PrimaLuna since day one.  This amp takes everything I throw at it in stride—always musical, always eager and always evenly balanced in overall presentation.  As with the other PrimaLuna products, the Premium stereo amp represents good value.  This is the perfect power amp for a music lover wanting to assemble a high performance system on a tight budget.  The ProLogue Premium is worth every penny.

I will say that one must be realistic when pairing the Premium with his or her speakers and listening environment.  Although the volume levels I’m able to achieve with this amp in my largish room are quite satisfying, 35 watts only go so far—even great watts such as these.  The amp does clip slightly when I get lead-footed with the volume.  To its credit, when the amp does clip, it does so with gentle compression instead of just falling apart.  To this point, speakers that are in the 90-plus-dB category will make for optimum system synergy in most rooms.

Additional Listening

By Jeff Dorgay

As Jerold mentioned, I’ve been listening to PrimaLuna amplifiers since the company introduced the original ProLogue One almost 10 years ago.  It’s almost like TONEAudio and PrimaLuna have grown up together.  That original amplifier is still in my family and, with a replacement set of power tubes, it keeps playing music on a daily basis without bother.

It’s been fun watching the PrimaLuna products evolve over the years into a more fleshed out line, with each model revealing more music than the one before.  Putting the ProLogue Premium stereo power amp through its paces is a joy, with the matching preamplifier and a few other examples I have on hand.  If you don’t need a built-in phonostage (and like your garanimals to match), the $2,199 ProLogue Premium Preamplifier makes for killer a setup with the Premium power amp.  The preamp is perfectly matched to the power amp electrically and stylistically, and pairing the two together will easily fool you and your friends into thinking you spent a lot more scratch on your system.  Many of my old-school buddies were having visions of vintage McIntosh in their heads, when I had this PrimaLuna combo connected to a mint pair of JBL L100 speakers.

Cranking up Judas Priest’s Screaming for Vengeance (on the matching PrimaLuna CD player we reviewed a few months ago) is a little slice of heavy-metal heaven—for a minute I was worried I might just blow up those JBLs, like I did back in the day.  The smooth sound of this PrimaLuna front-end package does not disappoint.
Another, more modern speaker that is a spectacular match with 35 watts per channel of tube power is Vienna Acoustics’ Mozart Grand.  The speakers have a 90-dB-sensitivity rating and a very gentle first-order crossover, but the ProLogue never runs out of gas when powering them.  And at about $3,500 a pair, the Mozart speakers won’t put you in the poorhouse.  Those on a tighter budget, consider a pair of Vandersteen 1Cs, which have the same high sensitivity, but are only $1,200 a pair.

Back when Kevin Deal and I sold mid-fi gear in stereo shops reminiscent of the one in the movie Ruthless People (1986), we used to describe gear as being more suited to rock or classical, etc., etc.  But the PrimaLuna electronics are a little bit of magic:  They play everything well, yet they inject just enough of that tubey warmth to make the bulk of your music collection sound much better than you’d expect it to.  This is a godsend for those having a mostly digital music collection, MP3s or CDs.

For this amp, I took the time to swap output tubes.  A set of super high zoot NOS 6550s or a new set of EAT KT88s, both of which will set you back about $1,500, but fear not, there are tons of great new EL-34 tubes in the $25-$50 range that sound fantastic. The extra midrange warmth and liquidity they provide will have you wondering if you ever need another amp.  And should a tube fail at an inopportune moment, the Adaptive AutoBias will even keep the amp purring along with a mixed set of output tubes. You’d be surprised at how many hardcore audiophiles have gone full circle back to the simplicity of an EL-34 amplifier paired with moderately efficient speakers.  This is an amplifier you can either start your tube journey with, or live with happily ever after.

With vintage Luxman, Marantz and McIntosh tube amplifiers fetching crazy money on the used market these days (not to mention their questionable reliability), make your life easy:  Put a PrimaLuna Prologue Premium between your speakers and just dig it.  You’ll be glad you did.

PrimaLuna ProLogue Premium Stereo Power Amplifier

MSRP:  $2,299

www.primaluna-usa.com

Peripherals

Digital Source	PrimaLuna ProLogue Premium CD Player    dCS Debussy
Analog Source	Rega RP6w/Exact    Monk Audio Phono Pre
Preamplifier	PrimaLuna ProLogue Premium    VTL TL-5.5Mk. II
Speakers	Lawrence Audio Violin    Dynaudio Confidence C1 II
Cables	AudioQuest King Cobra    Furutech LineFlux and SpeakerFlux

Space-conscious listeners love integrated amplifiers because they can route and amplify sound signals from a single box. And while audio purists often devoutly believe that separate preamps and power amps constitute the one true path to great sound, the distance between separates and integrateds has audibly narrowed.

Founded by Herman van den Dungen, a CEO with an extensive audio pedigree, PrimaLuna (“First Moon” for non-Italian speakers) entered the tube-gear scene in 2003. It currently merges sophisticated Netherlands design with cost-conscious Chinese production. Now, before you “Chinese audio products suck,” know that van den Dungen and company marketing executive Dominique Chenet demand quality.

Prima la Luna, Poi la Musica

The $2,299 ProLogue Premium integrated amplifier falls between ProLogue and  Dialogue integrateds. The “heft means quality” principle is operative, as witnessed by the 45-pound snatch-and-grab needed to lift the unit out of the triple box carton. Fit and finish are superb. From the silver facade (black is also available) to the attractive cage keeping the hot tubes safely away from curious fingers to the automotive-grade paint job on the transformer covers, this baby exudes class.

The front panel sports a volume control, source selector, and operation lights. A power switch resides on the left-side panel. On the right sits a tube selector switch for EL-34s, allowing 35 watts per channel (per the review sample) or 40 watts per channel with KT-88 tubes. The rear panel hosts speaker terminals for 4- or 8-ohm operation, four line inputs, one home-theater pass-thru, and a power receptacle/fuse holder. A slender but solid remote handles volume, source selection, muting, and playback for a PrimaLuna CD player.

Considerable coolness resides beneath the warm tube sockets housing four EL-34s and four 12AU7s. The Adaptive AutoBias, or AAB, circuit keeps tubes from misbehaving and protects the output stages. Additionally, there’s the BTI, or “bad tube indicator,” that detects tube malfunction, flags the offender, and powers the unit down until said tube gets replaced. A PTP, or “power transformer protection,” stops the party if the output power transformer overheats. This device is coupled with an OTP, an output transformer protection circuit. Given the wing-and-a-prayer security offered by some audiophile equipment, the ProLogue Premium is a component you could surely take into a hurt locker. Plus, for vinyl heads, PL offers an optional easy-to-install moving-magnet phonostage for $199.

Low-Frequency Slam, Dynamics, and More

Plug-and-play equipment is great in concept. Unfortunately, many such high-end adventures resemble trips down the Amazon after the local guide falls overboard and drowns. In this regard, the ProLogue Premium marks a refreshing return to civilization.

After removing the foam surrounds from the tubes, I hooked up my peripherals and speakers, and plugged everything in. Wait. Is that the sound of silence? Not to worry. PrimaLuna subscribes to an aptly named SoftStart feature that powers everything up very safely, but very slowly. Red panel lights give way to green panel lights and, in less than two minutes, it’s ready to go.

For the purposes of this review, the ProLogue Premium drove Totem Mani-2 Signatures, fortified with Nordost Frey bi-wire speaker cable. Sound sources included a PS Audio PerfectWave Transport and Mk II DAC, a Logitech Squeezebox Touch with USB drive, and an Oppo BDP-95 universal player. In my 15’ x 10’ x 8’ room, I settled back in an easy chair about eight feet away from the Totems, which rested on lead-filled Target stands.

After a week of break-in, I popped Mark Levinson’s demo Live Recording from Red Rose SACD into the Oppo. Enter “In a Sentimental Mood” flowing from Chico Freeman’s mellow sax and George Cable’s funky piano. Having sat in the same Red Rose show room where these performances were recorded, I assure you that the ProLogue Premium faithfully renders the music’s immediacy, right down to the reed movement on Freeman’s mouthpiece.

A high-res 96 kHz/24-bit download of Cat Stevens’s Tea for the Tillerman places the visceral guitar from “Wild World” right in my face and exposes the slightly veiled character of Stevens’ distinctive voice. Speaking of vocals, Diana Krall’s well-recorded Live in Paris contains a very, very good rendition of “A Case of You.” Krall’s sensual huskiness comes across convincingly, thanks again to the ProLogue Premium.

Larger-scale music arrived courtesy of a 176.4k/24-bit Reference Recording of Rachmaninoff’s Symphonic Dances, performed by Eiji Oue and the Minnesota Orchestra. The ProLogue Premium conveys the first movement’s low-frequency slam without running out of gas. Moreover, Bach’s Gigue Fugue, from the ultra-demanding Pipes Rhode Island, more than amply fills my modest-sized room with the dynamic sounds of the English Renaissance organ in St. Paul’s Church in Wickford, RI.

Is it Moon Glow or Memorex?

When comparing the ProLogue Premium with my reference unit, the Class A Pass INT-30A, the worlds of tubes and transistors seemingly converge. The Pass sounds non-solid-state and the Prologue Premium non-tube-like. The evaluation also shows how power ratings can be misleading, especially given the nominal five-watt output difference between the two amps. In recordings with heavier bass passages, like the Rachmaninoff disc, the Pass brings out more low-end oomph and overall space. In voice reproduction, a critical issue for testing audio gear, the ProLogue Premium behaves well, yielding little, if any, ground in warmth to the Pass.

The ProLogue Premium performs well beyond its real-word price tag. A hale and hearty pentode pumper, it’s well up to the task of keeping content my Mani-2 Signature speakers. Of course, before opting for such an amplifier rated on the lower side of the power curve, careful consideration must be given to room size, speaker sensitivity, and listening habits. Remember, 35 watts per channel can’t do everything.

Still, compared with other similarly priced products, the ProLogue Premium is considerably overbuilt. The onboard protection circuitry gives considerable ease to my concerns about tube equipment. Better yet, none of the proprietary protection circuits entered the picture during my evaluation, which should reassure any prospective owner that the integrated claims the reliability of most solid-state gear. Further reassurance against field failures comes via PrimaLuna’s tube selection. On average, the company rejects 40% of manufactured tubes—not due to defects but because they don’t meet the company’s high standards. The ProLogue Premium definitely meets mine.

Additional Comments

By Jeff Dorgay

Attention vacuum-tube amplification newbies and all other concerned parties: My first PrimaLuna Product, the ProLogue One integrated amplifier, is still going strong after almost nine years of constant play. It’s had an interesting trip, going from TONEAudio’s headquarters to our first music editor’s office (where it was rarely turned off) to my niece’s living room, where it still plays eight-to-ten hours a day. Other than a new set of EL-34 output tubes installed in 2010, it has run faithfully without as much as a hiccup.

Where the original ProLogue has a warmer overall sound overall, the Premium features more extension at both ends of the frequency range and more immediacy—thanks to the updated circuit and larger transformers. Having exchanged the EL-34s for KT88s and 6L6s, I prefer the tonality of the EL-34. In a modest-sized room with a great pair of mini monitors (I used the outstanding Penaudio Cenyas for my listening), this amp is all you need to rock the house.  Should your tastes veer more towards Van Halen than Vivaldi, the ProLogue Premium will please you.

Based on my 2004 review for the magazine, the original ProLogue received a Product of the Year Award from The Absolute Sound. The new Premium version costs more, but still offers an audio experience unmatched for the price. I’m happy to grant this integrated an Exceptional Value Award for 2012. Like the legendary tube amplifiers from McIntosh and Marantz, it’s an amplifier you can hand down to your family members through the years.

PrimaLuna Prologue Premium Integrated Amplifier

MSRP: $2299 (USD)

PrimaLuna USA

www.primaluna-usa.com

PERIPHERALS

Digital Source	Logitech Squeezebox Touch    PS Audio PerfectWave Transport/DAC (Mk  II)   Oppo BDP-95
Speakers	Totem Mani-2 Signature     Silverline Audio Minuet Supreme
Power Conditioner	Running Springs Audio Elgar
Cables	Nordost Valhalla    Nordost Frey
Power Cords	Nordost Valhalla    Nordost Brahma    Nordost Vishnu