ARC's new REF-75


I read Paul Bolin's review of the new REF-75 in AudioBeat and was really taken by it. So, this past weekend I drove down to Newport Beach and attended The S.H.O.W. to take a listen. In spite of the room being a bit bright, I could clearly hear the advantages this amp offers.

The REF-75 is physically beautiful with a kind of retro look. Must have been the meters. I love the looks of this amp! I placed my hand on top of the amp and it was barely warm to the touch. It runs really cool in spite of not having fans. Another advantage ... no fans ... no fan noise.

Right off the bat, the REF-75 was so grain-less, it was simply amazing. The sound comes out of a perfectly black background and the inner detail is amazing with great decay on vocals and simple instrumentals. I love classical guitar and small jazz groups, so this is right up my alley. Vocals were amazingly clear and realistic as well because of the lack of grain. Separation of instruments is another VERY strong point of the REF-75, adding realism to orchestral music. Tonality is one of the first things I listen for ... and this amp is right up there with the best of the ARC amps, including the big REF Monos. The demonstration was made using Wilson Shasha speakers ... 87db, and the meters hardly moved at all even while listening to full orchestral music. The darned thing just coasted no matter what was thrown at it. So, dynamics are terrific ... the amp supposedly uses the same power supply as that in the REF-110, so that would account for the dynamics and particularly good bass punch and depth. Huge sound stage as well. Width, depth and height were more than expected ... in fact, huge in every way.

The REF-75 I listened to at the SHOW was a prototype, but based upon what I heard, I'm buying one later this month. I've owned and/or listened to a lot of ARC amps over the years, and I can say without reservations, that this is one of the very best amps ARC has ever done. The release date is toward the end of June and the retail price is scheduled to be $9,000.00 US. Oh, and if you own a REF-110 ... sell it quick!

As a further note, I visited the Optimal Enchantment room and auditioned the new ARC REF-250 mono blocks. Randy Cooley, the owner of Optimal Enchantment, had the system set up in a suite and really had the system/room dialed in. Randy always has a great demo and has an impeccable taste in music. What I heard in Randy's room this year was simply magic. It had me shaking my head in disbelief wondering how much more information could still be hiding in those record grooves. Was it better than what I heard in the room that demoed the REF-75? Ahem ... it was, after all, Randy Cooley's room. :>)
128x128oregonpapa

Showing 8 responses by 213cobra

I haven't been pleased by Audio Research amplification for a very long time, and that dissatisfaction only mushroomed over the past dozen years or so. Keep in mind I've sold and owned ARC in the distant past. I'm long out of the industry. I've cited ARC as tragic evidence that hifi took a wrong turn, continuing to release products built more for ego than music. The entire REF line has sounded so far just about as far removed from convincing musicality as one can get using vacuum tubes, so I had hopes that the REF 75, being a modest implementation of a simpler, rethought ARC sound, might reverse their long slide into toneless asceticism.

I guess not. I heard the REF 75/ Wilson combination, and every other ARC installation at the show. I suppose one can get so accustomed to that sound so as to interpret it as "grainless" if all other comparisons are to amps that have more grain, but that's not what I heard. In fact, one of the distinguishing "features" of every modern ARC tube amp I've heard (and I've heard just about all of them) is the pervasiveness and persistence of distracting sonic grain. I'll go further and say there's midrange grunge, too, as in the subtle crossover notch grit common to all push-pull tube amps voiced to sound like solid state and tilted to over-resolution. Another common "feature" of the REF series, including this new one, is spatial "field flattening" and vocal glare. But again, if all you listen to are amps that are worse in these respects, the REF might be heard as smooth and articulate.

Not to me.

Some of this is surely the fault of current production tetrodes and pentodes, but some of it originates in design. The REF 75 sounded tonally bleached, with incomplete note decay. It was revealing of leading edge detail and very competent with hard-but-not-harsh sounds like single-event percussives and strong string plucks. It lost the rest of the note too soon. many simultaneous transient events didn't put the amp in a good light. Unless congestion upon crescendo sounds normal to you. And I don't forgive it insufficient break-in time because these same traits are exhibited by every other REF amp in the series as well.

The svelte Audience solid state amp was better in all these respects and I say that as someone who has never had a single year of my life without tube amps amplifying music for me. The McIntosh autoformer SS amps are more musically convincing. And lots of non-mainstream tube amps will trample the REF 75 if you're judging by musical performance instead of wanting to listen to square waves.

I'll say one thing in the ARC's defense. Most of the "name" tube amps of substantial power at the show were lashed to crossover-intensive multi-driver speakers, so on top of the compromises in the amps, you were listening to compression and subtle grunge at the crossover points of the speakers. The two together aren't a recipe for convincing music reproduction, but they're certainly a recipe for something....else.

The REF 75 wasn't nearly the only disappointment at the Newport Show, but it was one of the more egregious let downs.

Phil
I heard the REF 75 at the show. In a room full of other people who were uttering superlatives. I disagreed with them. While I will hear a REF 75 again in a more domestic or dealer setting, given that I heard nothing out of character with the rest of the REF line, I have no reason to expect this amp to impress me under different circumstances. The people who are praising the REF 75 express admiration for other REF amps, including the toneless REF 250. None of them are convincing to me. It does look good in a more subtle expression of the ARC industrial aesthetic. OK, there's a compliment.

But this is a common phenomenon in high end audio: a vaunted brand develops a house sound bereft of convincing musicality, and its following reveres this enough to render it a new, if wrongneaded, reference. Whether referenced gear bears any resemblance to how real instruments and voices actually sound becomes a disregarded criterion.

This amp, in particular, because of its rumored promise and (well, in a hifi way of thinking) moderate pricing, is Exhibit A in the parade of proofs at the show that hifi is largely off the rails, and most reviewers are happily in the lead.

In any other industry, ARC would be considered an insignificant and marginally-successful company. In high end audio, it has a magnified brand and it has stayed true to its ardent commitment to build quality. But now it is sonically-uninspiring and generic, in my view. Having forfeited, due to musically-indifferent products, the reverence once justifiably granted ARC by music lovers, it no longer merits default consideration by them. I was hoping this amp would signal a turn back to musically-legitimate amplification but unfortunately I didn't hear even the briefest indicator such might be so.

If you're an exhibitor and you can't give me even a glimmer of hope that your new amp is musically-persuasive while you believe it is, what are you doing? Enough with the excuses. I don't mean to pick on the REF 75. But as one of the more egregious let-downs at the show, it stands in for a freight train's load of aural trouble that was, collectively, the Newport show. Quality was largely on the fringes. The mainstream in high end is mostly off the rails, having remembered the "high" and forgotten "fidelity."

Phil
>>I guess you don't like ARC....Or just fed up with the state of the industry in general?<<

Some of both. There was a time when I loved ARC products. Today ARC makes some good preamps, and their DACs have been sonically interesting. It's in their power amps where they've taken a wrong turn, in my view.

I've been spending my own money on audio for a little over 40 years. It's not that I'm so old as that I started young, and I'm old *enough* to have experienced a more successful time in the industry. Our industry has dug itself into a hole and not being happy with nearly complete cultural irrelevance, it is digging faster. There are many reasons for this, but among them is products like the REF 75: over-resolving at the expense of natural tone; current into any load at the expense of nuance and clarity; leftover grunge due to the topology; and in this case lock you into one power tube by one maker.

I sent a friend to the show who is not an audiophile. He appreciates my systems, which has led him to begin considering spending real money on audio. I said, "considering." He didn't go to the show the same day as me. But I wanted to know what a music lover and musician who has had little exposure to our industry today, likes, dislikes, thinks. I didn't prompt him about anything. Just suggested he go, hear everything he can.

"I heard a lot of sound but not much that sounded like music." That was his first assessment. He loved what he heard in one room and one room only: The Audience room when the ClairAudient One was playing. A tiny $1800 speaker blew away the giants. Now, that did happen to be the best sound at the show, though I wish they had demo'd the 2+2. And it was the best sound of the show because it was the most coherent and it struck the right balance between resolution and tone. It was also playing via the most natural solid state amp at the show.

He couldn't really relate to much of the rest of it, though some rooms sounded closer to music than others. His conclusion was that the worst rooms were those with the most imposing gear. With a few exceptions, that's my experience too. If it's garish and imposing, it's probably not going to sound much like music. The little REF 75 is only small in the context of the many bigger amps on display, but it's by no means small, alone. It does exemplify however the prevailing sound that's come to be associated with high-end cred: cold, spatially flattened, inorganic, super clean, resolving beyond the actual acoustic experience of hearing music performed, bleached of tone, overdamping of decay, incapable of communicating the seduction and full emotion of the music passing through the gear.

And the trouble is, once you no longer know what the full emotion and tonal integrity of music sounds like in real terms, then something synthetic becomes the new measure. That's where we are now, and that's what was abundant at the Newport show. I could not reconcile the groupthink enthusiasm I heard expressed for 97% of the gear demonstrated, with what I was actually hearing.

But there was beauty and truth in about 3% of it, and that's what keeps my interest. It just wasn't coming from the likes of ARC, Wilson, VTL, Scaena, Focal, et al. As long as the mythmakers in the industry, and the people who extend them credibility, believe that Wilson and Focal, to spotlight two egregious offenders, make musically convincing speakers, the whole industry will be a headscratcher to anyone coming from outside who can't reconcile their sonics with how music heard in performance actually sounds. In high end audio, it's the 3% who get it in the realm of right.

Phil
>>So much from a Guru whose references are Klimo and Kent.<<

Kent? I've never owned the Klimo Kent amp. The Klimo Merlino Gold spent 6 years in my system -- and it was and remains excellent -- but the change from Zu Definition 2 to Definition 4 warranted a change in preamps.

My current preamps are Melody Pure Black 101, Audion Premier, S&B TVC. My current amps are Audion Golden Dream 300B PSET, Audion Black Shadow 845 SET, Quad II Jubilee. Of course, that's what I own. I've heard most of what the industry sells, and don't own most of it by choice.

Phil
>>but what I found is those with deep pockets to buy new gear often seek out components with a sonic signature that leaps out at them.<<

No doubt. But what does that kind of assertiveness of signature have to do with music? This has always been a tension in music reproduction, but there was once a balance. Now it seems in runaway. It would be easy to blame buyers who respond to the sound you describe, but it's builders who started down the path. I trace it to the sonically disastrous introduction of Krell circa 1980, which was a sharp turn in ego purchasing. At the time I was astonished that reviewers went along with the sound. It bent the industry, and of course only led loudspeaker designers to come up with more crossover-intensive designs, also having more difficult loads to drive. It's not hard to understand buyer preferences evolving toward the synthetic since the industry has been moving its market away from natural references for many years.

I agree VTL in triode mode, like most pentode or tetrode amps offering a pseudo-triode option, sounds different and largely better. Hardly anyone uses them that way, though.

My complaint about Focal is the obviousness of compression and tonal strain near the crossover points, and the insufficient unity behavior of the drivers -- not unique to Focal but it sounded especially distracting and not least because of being present in such an expensive speaker well engineered in so many non-sonic ways. I have to believe the designer(s) can do much better with so much material cost in their speakers.

Phil
>>What I'm trying to get to here is that there will always be trade offs. Never a system IME that will do all types of music as well...<<

I don't agree. Any combination of hifi gear claiming fidelity can and should perform any kind of music "well." Perhaps not perfectly, but certainly well. If it cannot play a full orchestra, Andrew Bird, Jack White, James Blake, Sierra Leone's Refugee All-Stars, Gillian Welch, Led Zeppelin, Doc Watson, M.Ward, the full international catalog of MA Recordings, Sonny Rollins, Gram Parsons, Justin Earl, Tom Waits, Hound Dog Taylor, Alison Krause, Kate Bush and Maria Callas with equal credibility, then a system is too skewed to genre.

I didn't reference my own systems, but you looked them up. Unless you've put together strong, big-glass SET with a fast & clean full range driver based speaker option of over 100db/w/m efficiency, you won't have heard the sound implied by what you saw listed. As speakers, Audio Note, Tannoy, Quad all impose marked trade-offs denting the polar graph of "all types of music [played] well." Good as they are, this can be overcome via some other brands.

You can get to a higher state of musical realism via many lesser-known brands *not* named Audio Research and some of the other offenders I mentioned. And I didn't mention "bliss." This is important to the point. Realism and convincing musicality are the objectives. If that's present, then you get bliss if the music content takes you there. If it doesn't, no bliss. Not all music is blissful. Were it so, that would be a distortion too.

Cary, Kondo, Jadis, Audion -- each a very different sound. I couldn't lump them together as representing any one thing. I haven't claimed there is one path; I've said that THIS path, represented by the ARC REF series and for reasons I've already written, is a dead end for anyone expecting more fidelity, not less, over time. That ARC has done worse in recent years doesn't convince me to be enthusiastic about the current series. I agree the new amps are better, still continuing a flawed direction. If you believe criticism is intrinsically condescending, then so be it but that's neither the tone nor intent of what I've written. Regardless, I stand by my description and people who don't agree will buy the REF amps or something like them.

Phil
Kana,

That's a good question. The difficulty of finding *any* suitable higher power pentode or tetrode push-pull amp using modern tubes and having natural voicing is enough to make my first recommendation abandonment of lower-efficiency speakers. But I know not everyone will do that. It would send a hell of a message though. If I needed ~75w/ch and I was predisposed to tube amps to get it, my first stop would be the Melody 845 push-pull triode amp at 70w per monoblock. Cost is similar or less.

Another option available to you because of ARC's long history of owner-friendly business policies is to find a good condition ARC Dual 76A and send it back to Minnesota to be refurbed to current standard, and then have a local tech retube it again with known NOS tubes.

Another option is the Tim DeParavicini-designed Quad II-Eighty monoblocks. Also his EAR Yoshino 899 or 890 power amps. As someone mentioned, big VTLs in triode mode are contenders. That's a flash answer to your question. If I think of others, I'll circle back. I mostly find natural sound between 5 - 50w these days.

There's also always McIntosh, though I think in powerful amps their quad-differential/autoformer output SS models (specifically and exclusively) are now preferable to their push-pull tube amps -- which is an exception for me to say. They're not a clear preference over ARC REF -- just different. In some respects these are all "lower-tech" circuits than the ARC REF amps, but for convincing musicality at the 75w power level from tubes, they are honest alternatives I hear as more natural, sonically. But they are also all amp types that are in my rear-view mirror.

Phil
I agree that many SET amps aren't versatile. Like any other topology, only a few examples excel across genres.

I was late to SET for this reason. In the 90s, all examples were slow and rounded, and crossover-based speakers didn't leverage them well. I tried single driver speakers but they were too colored with shout and glare at the time, most also lacking any reasonable power handling.

I found two breakthroughs in sequence. Audion's 845 mono amps combined real dynamic muscle with SET finesse, and Audion's circuits all sound uniquely "fast." Faster than push-pull amps. The second breakthrough was finding Zu's full range driver speakers, especially the Definition.

101db efficiency from a speaker that can also take a 1000 watts amp is a remarkable thing. Crossoverless coherence, near-electrostatic speed, and the dynamic response to pressure a room on 25w changed the equation.

The combination will play the 1812 Overture, and UB40, as well as Dusty Springfield or a solo piccolo recording. But then Definition is a speaker good to below 20hz if your room supports it, and gets to 101db on the first watt, 1 meter from the speaker. Most people in all of audio have never heard this, and it's not only Zu that can put you in the realm.

Point is, I don't let the gear determine the music I listen to on it and no one else should either. Today's market gives everyone options for more convincing fidelity from simpler gear, more akin to what instruments and voices sound like, but those options aren't generally coming from the best known brands and their design rut.

Phil