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!


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philharmonicpete, glad to have you here. I am so glad you have stated " IMHO ". This is all " our opinions ". You obviously never heard the Volti Vittora and sub bass system. It is ok you like what you like. As another poster mentioned on another thread, this audio world would be very boring if there were only 1 set of speakers for the wide variety of listeners. Have you heard the AG trio / XD system, in a proper sized room, for you to make that comment. I so disagree with you, and I am not surprised you are in the camp that ELs are IT, just as viber. And just so you know, I never said Lascalas, or horns in general, reproduce live, as live does. What I can tell you is this. I have taken a very clean mic and guitar mixer, and have used my Lascalas to playback my singing, and my buddies guitar playing, and it was awesome. Play loud, yes they do. But if you think that is what horns do best, you are wrong. It is actually the accurate portrayal of soft vs. loud, with an ease and flow, which cannot be duplicated by ELSs, or anything else for that matter ( IMHO ). How far did you " take " your Lascalas when you say you owned them ? This is a great discussion. One of my earlier points, was that when we stop looking for better ( listening in this case ), and can stay seated, day after day, listening to our favorite music, and not looking at the equipment ads on here or elsewhere, is a great place to be. This also shows our individuality, of how each of us hears, what are our priorities are, and so on. I am yet to hear a system that sounds identical to real, live, unamplified music. So, with all that said, Enjoy ! MrD.
The issue here guys is WHAT is the life event supposed to sound like? How do you know if electrostatics or horns or beryllium gets you the closest ? It’s hard to tell. I’ve heard some say that panels get you the closest to natural sound and those woofer/tweeter set ups add flair to the sound. So how does one know WHAT is the standard from so many technologies? Hard thing to do...
Mr. D, love your writing and totally respect your opinions.  To answer some of your questions (but this is WC's discussion so I don't want to get off topic), I have never heard any of the Volti but have heard the AG Trio twice.  Once at a show, set up by Jim Smith, with AG standard woofers.  The other time at a dealer, set up expertly in a great room with the matching bass horns.  Not the new XD version.  Both used super electronics. The sound was excellent in both cases but when simple female vocal sang accompanied by guitar, for example,  the image was bloated and totally unlike real music.  Similar to the way early Magnepans distorted the image..  I can easily live without the huge dynamics when other speakers, not just ESLs, are more correct.  Gigantic sounding acoustic guitars are not what I hear when I hear that instrument live.  That totally destroys, to me, the illusion of trying to sound like the real thing.  The La Scala, by the way, images correctly and so do the AG Duos.
wc, the issue is " what do each of us think it should be ". No right or wrong. We all seem to be defending " our perspectives " on the matter. I am correct however, and everyone else is wrong, LOL, LOL, LOL. As I stated, there are many characteristics in music, and breaking it down even further, some of us like vocals, some of us like guitar, some, as viber, grew up loving violin, etc. Once it is down on record, cd, broadcast, whatever, we need to reassemble it the best way, within our financial means, for our own interpretation. That is why my statement ( I think I will apply for a patent ), is so true. We just need to find what we like, that is all. Not complex in theory, but anyone reading your thread, has been through many speakers, amplifiers, dacs, cables, cartridges, etc., to find what they feel is right, for them. It is all good. philharmonicpete, I appreciate it. 50 years is a long time to be " into it ", so, I have discovered what is best, for me. And it was over 50 years ago that I was introduced to Khorns, and through time, with so much exposure to so many other things, I still like the Klipsch Heritage models, and some other horns. This is me. I really do believe the Vittora system, " does it all " ( for me ). Enjoy ! MrD.
MrD,
Back in the 70's, I heard the La Scala and Belle Klipsch at a midfi dealer driving them with receivers, etc.  The La Scala was about $600/pr, and Belle about $900/pr retail.  I wasn't a sophisticated hifi listener at the time, but somehow I liked the Belle better--it seemed more coherent and focused than the La Scala.  They were both about the same size and I didn't understand why I preferred the Belle.  The Belle was more attractive and compact, so maybe that biased me in its favor.  So I agree with you that close together horn drivers is a good design.  My father emphasized that the ideal speaker is a point source, not a bunch of widely spread out drivers.  That is one reason for my criticism of the Neo.  The horn gives the power to the point source.  The AG Trio is not a point source, so the imaging is not as focused as either the Altec 511 driver which covers 500 to 22 kHz or your La Scala or Belle whose midrange/HF drivers are point sources.