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
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
Hi Bvdiman,
Reading your account above it just seems the amp-speaker match was`nt ideal rather than an inherent problem with the amplifier.A good SET amplifier with the 'appropriate' speaker can play all types of music in my experience.
Regards,
Hi Charles,
I've tried..
2 Tannoys, 2 Pro Acs, 1 AudioNote speakers--owned. Accapella, Avantgarde--
tested. With numerous various SETs owned/borrowed--too many to name/remember.
It wasn't amp-speaker matching issue in my case, probably more of the very diverse
musical genres that I listen to. Room size (my old space is larger than current), and
loudness level that I sometime like to crank the system up are determining factors too.

Will a full blooded sports car take me to the Ball, sure it could.. Can a limousine
accelerate fast and cruise me effortlessly at 120mph, yes certainly. But depending on
occasions, one is clearly made to be better/suited than the other. Hence, if you love
speed and often hit the highway, yet use that 'one' and only car you have for weekends
with family too, then getting rides such as Panamera Turbo, or Bentley GT cruiser is the
best compromise/option--I think.
As for 845s based amps, currently my bet is high on Jadis SE845NEC over others. But
wait.. this is ARC's thread! :)
Cheers,
Rather surprised to see an audio research UL PP amp work with bvdiman's accuton tweeters. I boldly assume bvdiman doesn't listen to violins much, or the listening room is extremely long.