Personal amp evolution


Seeing the over night success of the speaker evolution thread, it may be interesting to see what type of amp(s) we have all run. Same deal as the other thread-we will sort of create a puzzle of our systems you'll have to visit multiple threads to put everything together!!! ;)
For me I started:
Adcom GFA-565 monoblocks
Rotel RB-990bx
Jeff Rowland Design Group Model 5
Balanced Audio Technology(BAT) VK-60

either a CAT JL2, BAT VK-75se or Tenor 75Wp on the horizon.
tireguy

Showing 4 responses by mitch2

Fisher Receiver
Sansui Receiver
NAD3140 Integrated - alone
NAD2150 Bridged w/3140(still have both)
Adcom 5300
Acurus A250
Acurus A200
Aragon 4004MkII
Classe DR25
(I know there is better than the DR25 if I want to spend the money, but have been concentrating on front-end upgrades and cables, and DR25 has kept up)
Time for an upgrade on this thread;

Fisher Receiver- not one of the classics :(
Sansui Receiver- worked great and got me through college
NAD3140 Integrated - a classic, still powers my 2nd system
NAD2150 Bridged w/3140(still works great)
Adcom 5300- thin and strident, one of my least favorites
Acurus A250- one of the better lower end choices
Acurus A200- actually preferred the older A250 by a little
Aragon 4004MkII- a very nice ss amp for the money
Classe DR25- more refined and musical than the 4004MkII
McCormack DNA 2- outstanding bass, otherwise unremarkable
BAT VK-500- nice mids but not as good at the extremes
McCormack DNA 500- the best I have heard, nice midrange, juicy bass, musical across the board, and never runs out of steam. I am sure there is better, but I suspect the price of admission for a noticable upgrade would be large (the CJ Premire 350 looks tempting though...)
I have been through a few more, so an upgrade....
Fisher Receiver- not one of the classics :(
Sansui Receiver- worked great and got me through college
NAD3140 Integrated - a classic, still powers my garage system
NAD2150 Bridged w/3140(still works great)
Adcom 5300- thin and strident, one of my least favorites
Acurus A250- an ok lower end choice
Acurus A200- actually preferred the older A250 by a little
Aragon 4004MkII- a very nice ss amp for the money
Classe DR25- more refined and musical than the 4004MkII
McCormack DNA 2- outstanding bass, otherwise unremarkable
BAT VK-500- nice mids but veiled and not that good at the extremes
McCormack DNA 500- excellent for the money, nice midrange, juicy bass, musical across the board, and never runs out of steam, high frequencies don't quite hang with the best
Cary 500MB- nice midrange for SS and pretty good across the board. The McCormack had better bass and the Cary was a bit noisy in comparison.
Lamm M1.1 - These amps showed me what music in your home can really sound like, rich, dimensional, dynamic, with deep powerful bass and an in-the-room holographic midrange. Extremely easy to listen to and never fatiguing. Sonic weaknesses included a darkness of tone and somewhat rolled off high frequencies, lack of air, and limited soundstage although these were slight and in no way did they overwhelm the positives. I understand these issues have been rectified in the M1.2, which I would love to own.
Herron M1 - Very nice amps with a musical and dimensional midrange, excellent sweet high frequencies, and good but not great dynamics and bass. I understand the attraction to these, but ultimately I need more "meat on the bone" and more powerful deep bass.
Clayton M200 - Initially had trouble integrating these into my system with my single-ended preamps until I interfaced with Jensen PI transformers and now the background is black/quiet. These are the real deal in just about every way, with clarity, neutrality, and excellent deep bass. They may ultimately lose out to the Lamm M1.1's in the areas where Lamm's are strong, but they are at least close in every way, and better in the areas where I listed the Lamm's having weaknesses. One of the best SS amps available.

Since my last post here, 8 years ago on 12-16-09, I traded up from the very good sounding Clayton M200 monos to their big brothers, the M300s. The list below picks things up from there.

Clayton M300: 300/600 wpc into 8/4 ohms, fully in Class A. There are so many things these amplifiers do well that I really need to cover them in a review. The main thing with Clayton amps is that they sound outstandingly real so you think less about electronics and more about the beauty and power of the music. Clayton amps provide much more power into Class A than the competition, and particularly at their price points. The M300s are about $17K.

Acoustic Imagery Atsah: 400 wpc. I replaced the Clayton M300s with these in a quest to have it all. The variety of NC1200 amps (i.e., Acoustic Imagery, Merrill, Mola-Mola, etc.) all offer a quiet, powerful, rich sound in a small, cool-running, package. They offered everything I wanted, except ultimately the sound. IMO, their sonic deficiency has to do with what I perceive as an absence of ambient information. I  do not know how that could actually be, but the sound reminds me of musicians individually playing in a studio rather than performers on a stage together. This is an inadequate explanation so, for those interested in understanding more completely what I ultimately could not live with, I recommend reading the review of the Mola-Mola Kaluga amps in Mono and Stereo linked below;

http://www.monoandstereo.com/2015/08/mola-mola-makua-and-kaluga-review.html

McCormack DNA-2 LAE with SMc Audio Platinum Upgrades: Steve did pretty much everything he could to upgrade this powerful (300/600 wpc into 8/4 ohms) stereo amplifier and it sounds very good indeed. It is clear, powerful and quiet, with a very nice tone. When I decided I couldn’t live with the Ncore sound, I took an opportunity on the somewhat rare LAE version of this amplifier and did not regret the result. I have owned several McCormack amps including a standard DNA-2 and the DNA-500. Of the four amplifiers listed in this update post, this is one of the two I still own.

Lamm M1.2 Reference: The biggest 110 wpc (into 8 or 4 ohms) I have ever heard. I previously owned the M1.1 and except for a somewhat dark sound, I completely enjoyed my time with them. These 1.2 Reference monos fixed the dark sound and kept all the other things I liked about the Lamm hybrid amps. The sound was full and tonally rich but with my speakers I ultimately found they did not offer quite the “slam” I was looking for and had a point where 110 wpc into 4 ohms was just not enough.  

Clayton M300: 300/600 wpc into 8/4 ohms, fully in Class A. Hey wait, did I not mention these at the top of this post? Sure did. After going through the three very good amps that replaced my previous M300s, I first tried to buy the original pair back and found that my buyer would not part with them. We still stay in touch to occasionally discuss things that work well with our Claytons. I finally purchased another pair used and sent them to Wilson Shen who fully upgraded them, as he did with my previous factory-purchased pair, and the result is spectacular. The somewhat large size and hot-running temperatures are small trade-offs for the outstanding sound I have achieved using these Class A amplifiers.  Wilson did not hold my temporary absence from Clayton ownership against me and in addition to being a wonderful manufacturer to work with, he is also a good friend.