Upgrading form Pass integrated amplifier to a better one


Hello,

Currently I have a PASS INT-250 integrated amplifier . The Pass INT-250 is a very good integrated (in my system it was overall better than Plinius Hiato, Gamut D150se, Mark Levinson 535, Vitus RI-100,  Accuphase E-470 and some others) but I can't get rid of the feeling that I miss some explosiveness (drum kicks for example) and micro details.

I know that its not the speakers. The new Sonus faber tradition I have are much more open, dynamic and airy than previous Guarneri Evos, Elipasas SE and Amati Anniversarious I used to own. And before buying them I auditioned the Serafinos with Audio Research separates and it was the amazing combo. But I really prefer not to go the separates road ( ICs, power cords and space contribute to financial constrains also) and even so I like the combo of Pass and Serafinos overall but from time to time looking for some better integrated on the market.

Currently I presented with a good opportunity to buy latest Gryphon Diablo 300 integrated or latest just released Accuphase E-650.  No possiblilty to demo them, so I am asking here on the forum if anybody can comment if Gryphon Diablo 300 or Accuphase E-650 will be better integrated than Pass INT250 overall and especially in terms of dynamics, micro details and harmonics.

Any advise and opinion would be very appreciated.

My system: Esoteric K-05x, Pass INT-250, Sonus Faber Serafinos, all cabling are the Shunyata Sigmas.

Room is 12" wide by 17" long. Listen mostly acoustic jazz and chamber classical on low to moderate levels.


Thank you.


denon1
@denon1, very interesting thread. Please let us know what you end up purchasing.

Jafant Lak, thank you, I will. Not an easy decision. The pass INT-250 is very good. May be anybody will be interested in my experience with the integrated..So far in my system, I had these integrated  (mostly playing with Sonus Faber or Vienna Acoustics  models):

1. Plinius Hiato - great midrange and bass, highs are hot and digital noise persistent - as result lack of air and micro details.

2. Gamut D150SE - good airy sound silky highs, but lack of bass and poor build for the price.

3. Accuphase E-470. Great build. I guess prestige play part. But nothing special with the sound - overpriced in US.

4. Pass labs INT-60 - great one,  
beat all the above but when I had Guarneri Evos, I needed some more power to get that relaxed/effortless feel in the sound.

5. Mark Levinson 585 - balanced smooth sound, but I felt its not a best match with Sonus faber.

6. Viva Solista - very good 845 tube based amp. To my surprise has been a good match with Sonus faber Anniversarios. The tube swapping so drove my crazy and it obviously ran hot. On a higher volumes did not have enough power to get SF sing. But with efficient speakers will be outstanding.

7. Pass labs INT-250 bested all the above. Power, musicality, good details. But I know that my new Sonus faber Serafinos can exhibit even better sound - with more flash out micro details and dynamics.

So my only choice that I like to explore is Gryphon Diablo 300.

Even so I appreciate it, please don't offer your opinion on anything else, since I am only interested in Gryphon. Lack of availability to demo, makes me to ask assistance on the forums. So again please anybody with hands on or any experience with Gryphon Diablo and its sound and reliability please chime in.

Thank you.

There are two products from T+A of Germany that might fill the bill nicely.

The first is a $11k integrated amplifier from the R series.

Musicfx bought one of these and he had compared the T+A to a comparably priced Pass labs integrated and he ultimately purchased the T+A over the Pass Labs and another integrated amplifier he was also auditioning.

The R series use much of the technology of the more expensive HV series but uses a superb switch mode power supply to lower the cost. The PA 2500r was amazing sounding when we had one on display it has a very purcuasive and rhtymic quality coupled with a huge soundstage.

http://www.ta-hifi.de/wp-content/uploads/the_absolute_sound_PA2500R_MP2000RMK2_September2017.pdf

T+A is the largest electronics manufactuer in Germany and they have the resources and raw engineering talent to create some very interetesing and very high performing gear.

The more expensive HV series integrated was compared to $120k worth of Ch Precision gear, in TAS and the reviewer Allan Taffel was having a hard time telling the difference, so the $18k PA 3000 HV integrated is one fantastic ampliifer.

The HV concept which T+A created runs solid state devices at very high rail voltages the same as tube products and the incresed voltage enbles the transistors to become more linear amplification devices reducing distortion and creating a very tube like midrange.

The T+A stuff is very powerful, with a huge sound stage, excellent transparency, but without being sterile, and the bass  is very punchy build quality is fantastic, is the the styling and feature set.

The latest T+A integraed the HV 3100 which is an improved version of the original less expensive PA 3000 integrated was compared with a $45,000 Dagasitno and the less expensive Vitus. 

The reviewer found the 3100 to combine the best of both of those companies products and the $22k T+A integrated was considered to sound as good as the twice the price D'agasitno Momentum product.

https://positive-feedback.com/reviews/hardware-reviews/ta-elektroakustik-3100-hv-pdp-3000-hv-sacdcd-...

So if you are looking at a destination level integrated this is one company I would look at strongly.

Dave and Troy
Audio Doctor NJ


I own an Accuphase E-600 and I am always questioning myself in terms of what would be the next step up. The new E-650 will be an improvement over my model. The first one is slated for delivery in December and will be available to hear in MA at Legend AV. I am considering tubes and have found that speaker cables can play more than a minor part in equipment synergy. I have come to the conclusion the amp selection/evaluation is only one part and that in many cases, other speaker cables must be evaluated as part of that process. I know that’s not what you wanted to hear but the issue is a real one, at least based on my experience.

I have auditioned or owned all the pieces you have tried other than the Viva Solista (which is something I would like to try). As for other brands, you might try contacting Philip O’Hanlon at On A Higher Note (US importer of Gryphon) to see if he can facilitate an in-home trial. 

Keep me posted as I am also on the "upgrade" path!
Greginnh, is E-600 really being class A really better than other integrated models in accuphase range? Did you had a chance to demo and compare? But still Accuphase is way overpriced here in US, so I doubt I will proceed looking at the new model.