Ref-75-SE delivered ...


It arrived late yesterday via UPS. I had company over last night so I didn't hook it up 'till this morning. I had it playing by 7:30.

I sold the REF-75 early last month and was using my spare, which is a great sounding ARC- Classic 60. Man, if someone is looking for a musical amp at a reasonable price, the CL-60 would be a good way to go. It kind of has that vintage tube sound. Listening to music through it, is kind of like watching a good Technicolor movie. Hey, who doesn't like watching the original version of The Wizard of Oz? Its not right, but its beautiful. I mean, when you walk outside, Technicolor doesn't hit you in the face ... reality does.

Which brings me to the REF-75 and the REF-75 SE.

I bought my original REF-75 over two years ago, brand new, with KT120 tubes. What struck me about that amp was the lack of grain, the soundstage and the tonality. It played big and it played beautifully. That's what I thought until I swapped out the KT120's for a new quad of KT150's. Now that brought the amp up to a new level. Audio nirvana, I thought. Hummph, silly me.

Enter the REF-75 SE.

Fist thing, I let it cook for about a half hour in order to get the amp to stablize so I could check the bias. Good thing too because both sides needed biasing. The right channel was all way over to the "Caution" level.

Upon initial listening, I was really taken by how quiet this amp is ... I mean QUIET!! Not digital quiet, that kind of quiet just sounds totally artificial to me. What I mean is ... its a natural quietness unlike any tube amp I've ever heard.

For the first two hours, it was better than the REF-75 it replaced by maybe 20% or so. At the two hour mark, things really started to open up. Here's what my notes say:

Quiet!
Articulate.
Dynamic.
Decay of notes.
Presense.
Fast.
Leading edge of notes.
Weight in the lower registers of the piano.
Sustained notes - has me hanging on a thread.

So how does this play out when listening to music?

Like most of us, I have a little section of records (among thousands) that I use for reference purposes. They are the ones I listen to first when evaluating new equipment. I know every nuance of these records. Listened to them hundreds of time.

First up - Sue Raney on the Discovery label. The SE allowed me to hear the volume of air, and the force and reduction of force that was coming out of Sue Reney's chest and up through her throat. On the third cut, there is a triangle that the percussionist delicately hits. With all previous amps, I thought there was just one triangle. Turns out, there are three. For the first time, I could hear the slight difference in the notes. That was hidden before.

Second up- Sammy Davis Jr. Sings. Laurindo Almedia Plays. Reprise RS-6236.
Again, like the Sue Raney album, the air coming out of Sammy's chest and across his vocal chords and all of the subtlety of that was in his total control. Then, I realized that all of the really great singers do this and that's why they have the great instruments they do.
The guitar work being done here by Almedia is superb. Not my favorite guitarist, but on this album his playing grabs you by the emotions. BUT, through this amp ... a different world. The leading edge of the notes and the subtle decay of those notes make this album extra special now.

Keep in mind that we are only two hours in on this new amp at this point. The sound stage is still constricted and the 3-D imaging is on a par with the Classic 60, and not as good as the old REF-3.

Over the course of the day, I continued listening for a couple of hours each time. The more time that passed, the better the amp got.

Next Album .. about 4 hours in: The Norman Luboff Choir .. "But Beautiful" Columbia CS-8114. This is a demo quality record that has a tremendously wide sound stage. Its fun. The chorus is spread behind the speakers and goes from wall to wall. And now, I'm getting a 3-D image like never before. The articulation in each chorus member's voice has never sounded better ... not even close. There is a female soloist named Betty Mulliner who has her place behind and just to the left of the right speaker. With all other amps I've had, she has sounded diffused. The original REF-75 brought her out of the mist ... but not like the new SE. Now, she is in total focus and its like I can see her head move and hear her lips smack. I can get a true sense of her personality. Same thing on every vocal record I played today. Get this album if you like beautiful classic pop music from the 40's and 50's

Next: John Williams Paganni:Guitar trio - Hayden: Guitar Quartet. Columbia MS 7163. Again, this is a sound stage spectacular. I love this album, not just because I'm a classical guitar freak, but because its a great test of equipment when looking for correct tonality. Like the once vague female soloist in the last album, there is a cello in the right rear of the sound stage that keeps getting more refined as my system improves. With the REF-75SE .. gone is the vagueness. All of it. That cello is now in the room, tonally correct, and very moving. And John Williams? For the first time, I heard the strings of his guitar vibrate. The decay of the notes seemed to last forever. How may accolades can I pile onto Mr. Perfection on the classical guitar? Buy this album, you won't regret it.

Finally a mono record to die for: Dave Brubeck's Jazz Impressions of The USA." This record never came out in stereo. Near as I can tell reading the liner notes, it was recorded sometime in '55 or early '56. This is Paul Desmond at his very best. Not as hard boppin' as the Oberlan College album ... but man 'O man ... the second cut "Summer Song" has Paul Desmond right there in the room. Its never sounded better than today.

So, that kind of gives you guys a hint of what was going on at my place today. The amp burned in for 12 hours, and toward the end the sound stage has filled out nicely, dynamics are startling, musicians were in 3-D relief, and most importantly to me, the instruments all sounded tonally correct.

My source tells me that at this point, the amp is only scratching the surface. He says ... wait until 200 hours has gone by before seriously writing any review of the new amp. I couldn't wait ... its that good. Bottom line for all ARC REF amp owners ... even at this early stage, I can honestly say... the SE kills the old amp. Go for the upgrade.
128x128oregonpapa
Tsushima1 ...

Well congratulations, you almost made it through an entire post without making a smarmy personal attack. Almost.

Look, I could care less about exchange rates and biasing. That's not what this thread is about. Perhaps you should start your own thread addressing your concerns regarding tube biasing and exchange rates. Hey, you could start a series of threads ... one where you discuss capacitors, another discussing resistors and another one discussing slew rates. I'm sure some folks who frequent this site would find topics like that to be very interesting ... perhaps even orgasmic. For me, its about getting closer to the music ... and the SE upgrade certainly does that ... IN SPADES!

With that said, lets agree to disagree ... and move on.

One final suggestion ... install a spell checker.

Take care ...
Trying to rate an improvement in terms of percentage is very subjective. If I'm listening to an amp that for some reason draws attention to itself, and the upgrade completely removes it then I may say wow that's a 100% better. In the case of my Ref 75 to the SE I can only say that I enjoy the sound much more than I did before. For me it's worth it. Going back to the non SE would not be an option now that I've heard it, even if you offered me my money back. I can remember being content with an old Kenwood receiver till I heard something better. Some of us like to continue to improve our systems others want to be content where they are. Both are ok. Companies Like ARC ( and others) are continuing to advance state of the art, that's what they do, and we love it. Good listening to all.
Thanks, Carey ... you are spot on in your assessment. I, like you, wouldn't want to go back to the standard REF-75 either. And that's after thinking before the SE upgrade that if my system never improved from there, I would be perfectly satisfied. What you and I are experiencing with the SE upgrade will soon be experienced by others on this thread who are sending their amps in for the upgrade. Once they pass a certain break-in point, they will be saying some of the same things we are, I'm sure. All I know is, I'm enjoying my vast record and CD collection more than I ever have ... and I've been in this hobby since the 1960's, a record collector since the 1950's and a devout music lover since the 1940's ... capacitors, resistors, slew rates and tube biasing be damned. *lol*

Take care ... and happy listening.
I've been in this hobby since the 1960's, a record collector since the 1950's and a devout music lover since the 1940's ... capacitors, resistors, slew rates and tube biasing be damned. *lol*

Take care ... and happy listening.
Oregonpapa

This puts you in your late 60s, early 70s? You sir have miracle ears!!!
You don't have to have miracle ears to like what you hear, do you Timrhu? MY question is, why do SOME audiophiles feel so compelled to comment in a NEGATIVE manner without offering anything substantive one way or another? If the op wants and can afford to spend the cost for the upgrade and feels it well worth it why not be encouraging, offer something more than a terse comment or just ignore the thread? I really don't get it.