My Long List of Amplifiers and My Personal Review of Each!


So I have been in a long journey looking to find the best amplifiers for my martin logan montis. As you know, the match between an amplifier and speakers has to be a good "marriage" and needs to be blend exquisitely. Right now, I think I might have found the best sounding amplifier for martin logan. I have gone through approximately 34-36 amplifiers in the past 12 months. Some of these are:

Bryston ST, SST, SST2 series
NAD M25
PARASOUND HALO
PARASOUND CLASSIC
KRELL TAS
KRELL KAV 500
KRELL CHORUS
ROTEL RMB 1095
CLASSE CT 5300
CLASSE CA 2200
CLASSE CA 5200
MCINTOSH MC 205
CARY AUDIO CINEMA 7
OUTLAW AUDIO 755
LEXICON RX7
PASS LABS XA 30.8
BUTLER AUDIO 5150
ATI SIGNATURE SERIES 6005

With all that said, the amplifiers I mentioned above are the ones that in my opinion are worth mentioning. To make a long story short, there is NO 5 CHANNEL POWER AMP that sounds as good as a 3ch and 2ch amplifier combination. i have done both experiments and the truth is that YOU DO lose details and more channel separation,etc when you select a 5 channel power amplifier of any manufacturer.
My recollection of what each amp sounded like is as follows:

ATI SIGNATURE SERIES 6005 (great power and amazing soundstage. Very low noise floor, BUT this amplifiers NEEDS TO BE cranked up in order to fully enjoy it. If you like listening at low volume levels or somewhat moderate, you are wasting your time here. This amp won’t sound any different than many other brands out there at this volume. The bass is great, good highs although they are a bit bright for my taste)

NAD M25 (very smooth, powerful, but somewhat thin sounding as far as bass goes)
Bryston sst2(detailed, good soundstage, good power, but can be a little forward with certain speakers which could make them ear fatiguing at loud volumes)

Krell (fast sounding, nice bass attack, nice highs, but some detail does get lost with certain speakers)

rotel (good amp for the money, but too bright in my opinion)

cary audio (good sound overall, very musical, but it didn’t have enough oomph)

parasound halo (good detail, great bass, but it still holds back some background detail that i can hear in others)

lexicon (very laid back and smooth. huge power, but if you like more detail or crisper highs, this amp will disappoint you)

McIntosh mc205 (probably the worst multichannel amp given its price point. it was too thin sounding, had detail but lacked bass.

butler audio (good amplifier. very warm and smooth sweet sounding. i think for the money, this is a better amp than the parasound a51)

pass labs (very VERY musical with excellent bass control. You can listen to this for hours and hours without getting ear fatigue. however, it DOES NOT do well in home theater applications if all you have is a 2 channel set up for movies. The midrange gets somewhat "muddy" or very weak sounding that you find yourself trying to turn it up.

classe audio (best amplifier for multi channel applications. i simply COULDNT FIND a better multi channel amplifier PERIOD. IT has amazing smoothness, amazing power and good bass control although i would say krell has much better bass control)

Update: The reviews above were done in January 2015. Below is my newest update as of October 2016:



PS AUDIO BHK 300 MONOBLOCKS: Amazing amps. Tons of detail and really amazing midrange. the bass is amazing too, but the one thing i will say is that those of you with speakers efficiency of 87db and below you will not have all the "loudness" that you may want from time to time. These amps go into protection mode when using a speaker such as the Salon, but only at very loud levels. Maybe 97db and above. If you don’t listen to extreme crazy levels, these amps will please you in every way.

Plinius Odeon 7 channel amp: This is THE BEST multichannel amp i have ever owned. Far , but FAR SUPERIOR to any other multichannel amp i have owned. In my opinion it destroyed all of the multichannel amps i mentioned above and below. The Odeon is an amp that is in a different tier group and it is in a league of its own. Amazing bass, treble and it made my center channel sound more articulate than ever before. The voices where never scrambled with the action scenes. It just separated everything very nicely.

Theta Dreadnaught D: Good detailed amp. Looks very elegant, has a pleasant sound, but i found it a tad too bright for my taste. I thought it was also somewhat "thin" sounding lacking body to the music. could be that it is because it is class d?

Krell Duo 300: Good amp. Nice and detailed with enough power to handle most speakers out there. I found that it does have a very nice "3d" sound through my electrostatics. Nothing to fault here on this amp.
Mark Levinson 532H: Great 2 channel amp. Lots of detail, amazing midrange which is what Mark Levinson is known for. It sounds very holographic and will please those of you looking for more detail and a better midrange. As far as bass, it is there, but it is not going to give you the slam of a pass labs 350.5 or JC1s for example. It is great for those that appreciate classical music, instrumental, etc, but not those of you who love tons of deep bass.

 It is articulate sounding too
Krell 7200: Plenty of detail and enough power for most people. i found that my rear speakers contained more information after installed this amp. One thing that i hated is that you must use xlr cables with this amp or else you lose most of its sound performance when using RCA’s.

Krell 402e: Great amp. Very powerful and will handle any speaker you wish. Power is incredible and with great detail. That said, i didn’t get all the bass that most reviewers mentioned. I thought it was "ok" in regards to bass. It was there, but it didn’t slam me to my listening chair.

Bryston 4B3: Good amp with a complete sound. I think this amp is more laid back than the SST2 version. I think those of you who found the SST2 version of this amp a little too forward with your speakers will definitely benefit from this amp’s warmth. Bryston has gone towards the "warm" side in my opinion with their new SST3 series. As always, they are built like tanks. I wouldn’t call this amp tube-like, but rather closer to what the classe audio delta 2 series sound like which is on the warm side of things.

Parasound JC1s: Good powerful amps. Amazing low end punch (far superior bass than the 402e). This amp is the amp that i consider complete from top to bottom in regards to sound. Nothing is lacking other than perhaps a nicer chassis. Parasound needs to rework their external appearance when they introduce new amps. This amp would sell much more if it had a revised external appearance because the sound is a great bang for the money. It made my 800 Nautilus scream and slam. Again, amazing low end punch.

Simaudio W7: Good detailed amp. This amp reminds me a lot of the Mark Levinson 532h. Great detail and very articulate. I think this amp will go well with bookshelves that are ported in order to compensate for what it lacks when it comes to the bass. That doesn’t mean it has no bass, but when it is no Parasound JC1 either.
Pass labs 350.5: Wow, where do i begin? maybe my first time around with the xa30.8 wasn’t as special as it was with this monster 350.5. It is just SPECTACULAR sounding with my electrostatics. The bass was THE BEST BASS i have ever heard from ANY amp period. The only amp that comes close would be the jC1s. It made me check my settings to make sure the bass was not boosted and kept making my jaw drop each time i heard it. It totally destroyed the krell 402e in every regard. The krell sounded too "flat" when compared to this amp. This amp had amazing mirange with great detail up top. In my opinion, this amp is the best bang for the money. i loved this amp so much that i ended up buying the amp that follows below.

Pass labs 250.8: What can i say here. This is THE BEST STEREO AMP i have ever heard. This amp destroys all the amps i have listed above today to include the pass labs 350.5. It is a refined 350.5 amp. It has more 3d sound which is something the 350.5 lacked. It has a level of detail that i really have never experienced before and the bass was amazing as well. I really thought it was the most complete power amplifier i have ever heard HANDS DOWN. To me, this is a benchmark of an amplifier. This is the amp that others should be judged by. NOTHING is lacking and right now it is the #1 amplifier that i have ever owned.

My current amps are Mcintosh MC601s: i decided to give these 601s a try and they don’t disappoint. They have great detail, HUGE soundstage, MASSIVE power and great midrange/highs. The bass is great, but it is no pass labs 250.8 or 350.5. As far as looks, these are the best looking amps i have ever owned. No contest there. i gotta be honest with you all, i never bought mcintosh monos before because i wasn’t really "wowed" by the mc452, but it could have been also because at that time i was using a processor as a preamp which i no longer do. Today, i own the Mcintosh C1100 2 chassis tube preamp which sounds unbelievable. All the amps i just described above have been amps that i auditioned with the C1100 as a preamp. The MC601s sound great without a doubt, but i will say that if you are looking for THE BEST sound for the money, these would not be it. However, Mcintosh remains UNMATCHED when it comes to looks and also resale value. Every other amp above depreciates much faster than Mcintosh.

That said, my future purchase (when i can find a steal of a deal) will be the Pass labs 350.8. I am tempted to make a preliminary statement which is that i feel this amp could be THE BEST stereo amp under 30k dollars. Again, i will be able to say more and confirm once i own it. I hope this update can help you all in your buying decisions!


128x128jays_audio_lab
Frankly, I am honored to be the subject of so many interesting, insightful and critical responses.  I don't try to stir up trouble for the sake of notoriety, but just describe what I hear, putting it into my perspective of long musical and audio system experience.  It will be surprising when I now reveal that my approach to live music is somewhat different than for audio systems.  This is relevant because Kren's excellent, informative connoisseurship of Spendor speakers reminded me of a few things.  I appreciate Kren's taste in the new more detailed Spendor designs, as having the best combination of the sweet classic Spendor sound with the new technology precision.  Spendor is a GREAT classic company founded long before Wilson.  When I dumped my huge Maggie Tympani 1D, I got the mini monitor Rogers LS 3/5a, and was hooked on it for a few years for its clarity and naturalness.  Someone played a Spendor mini monitor for me, and I appreciated its greater beauty even if the Rogers had more snap.

I know that few people here are interested in violins, but Kren's taste is similar to my holy grail quest for my dream violin my whole life.  I have played a few thousand old and new violins made from 1500 to the present.  The few rare, highly prized violins now command tens of millions of bucks.  I was transfixed when I played a few of them.  At one auction, in my left hand I held and contemplated a gorgeous Amati, made in the mid 1600's.  This beautiful looking, sweet sounding instrument was owned by Mussolini.  This tyrant at least had great taste.  In my right hand I held a Stradivarius, made in the early 1700's.  Amati made feminine looking sweet instruments that weren't as powerful as those of his best student, Strad, whose innovative sound was bolder, more powerful, not as sweet.  Strad is more highly valued today, because it offers the best combination of everything--power, HF brilliance, and still excellent sweetness.  600 Strads survive, I played about a dozen, and one which was truly special. I think of Kren who seems to have optimized the combination of sweetness and brilliance in his choice of his present Spendor D model.

So in my music making, I like the combination of sweetness and brilliance.  The trouble is that no audio system approaches my musical experiences as both listener and performer.  I regard the live experience as the MUSIC, but view an ideal audio system as merely the passive honest messenger who transparently reveals the news (music), without editorializing the news.   I love the colors of the real music, but if the audio system colors or editorializes it, I am losing the real music to an extent.  The truth is that all systems editorialize, and I seek the least editorialization.  So my quest for the highest clarity and detail in the system is different from my quest for the beautiful colors of the real thing--the live unelectronic music. 

Chazzzy, I have used several headphones in my regular audio system.  My favorite is Beyerdynamic 880, then AKG 1000, Grado 1000.  I tried various electrostatic phones--expensive Sennheiser, Stax going back to 1980.  I had hoped that the purity of the stat phones would give me the purity of my stat speakers, but the headphone effect is like being in a closet, which greatly magnifies the bass, muddying everything.  I have improved the situation by using small cups around the cushions which give me a little distance from my ears, creating a close range ear speaker.  Still, the tonal balance is not as pleasing as my in-room speakers.  My favorite phones I listed are dynamic ones.  Horrors--I have bashed dynamic room speakers while I like these dynamic phones!  Why is this?  The dirty secret is clever EQ by the designers of these phones to avoid the confining closet effect of phones on your head, and tailor the sound to the designer's liking.  Judicious EQ really works in many situations.

I haven't used these phones on my computer outputs in a long time, so I don't remember whether they benefit me.  Part of this is laziness, but many headphone lovers after initial fascination, get tired of it.  We like music in a real space like our room or hall, but don't like it given by intravenous injection with the headphone.  I'll get out my Beyerdynamic 880's and listen again.  So for all of Jay's videos over the last year or two, I have listened with just my iMac stock audio system.  It's good enough to let me hear the differences Jay presented.

I wish Kren well on maximizing the potential of his Spendor.  If a Chord dac has the precision that opm says, then the Spendor could have that magic marriage of sweetness and even higher clarity, which I enjoyed when I briefly played that great 1736 Strad.  Well done, Kren!
pokey77,
Oh yes, thanks for acknowledging agreement.  Even with different preferences, there was something we agreed about.  The more open are the communications, people can realize they agree about more and more.  This requires an open mind.  I could come over to anyone's house, blindfold them, learn their tastes, and show how I could please them with judicious EQ that suited them.  If they want more detail, I could swap their speaker cable for zip cord, and they would beg me where to buy this unknown component for $10-100K which reveals more HF and dissolves veils. "Oh, is there a review of this 500 lb monoblock or cyber plasma cable that I could read to confirm what I just heard?"  No there isn't, from the audio press that thrives on presenting expensive things to serve the interests of the audio industry.  

Now Jay has concluded that spending over $30K or so on a dac is a waste of money, which should be put elsewhere.  I say the best speaker. I stlll preferred the MSB over the cheaper Rossini, but the differences were small.  You could live happily with either dac.
Viber,
So you were not even using headphones to listen to Jay's DAC videos? You were able to hear what you did over the stock speakers of the iMac???

Not long ago I watched a really good documentary on the evolution of the violin and the genius of some of the early makers like Stradivarius. Quite interesting.
One of the aspects of that violin documentary was the tone chasing and how the age of the woods used made for tone and how Stradivari was just a genius in his violin making.

The original violins makers and violinists were the original Gearheads in how they chased tone thru the making and purchasing/playing the best violins. They are our ancestors... 😄😄😄
This hobby should be fun but unlike other hobby's what one gets out of it is personal, just by it's nature not everyone is going to be in total agreement. Bottom line should be about the music and not trying to be right or convince others that you are.

Personally i have other hobby's i like cars and collect vintage race motorcycles. I have a C8 Corvette coming next month and today i just ordered a Ram TRX. For me having more than one hobby keeps me from getting obsessed in one. This could work for others.

I bring this up because i did not log on all day and when i did this evening all i read is three pages of bickering. I read this thread to hopefully learn something and to read what might be coming next from Jay, opinions are fine but it seems some are beyond that.

Lets all take a deep breath and get back to having some fun.