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
Viber,

Sorry, there's not a single word you wrote that I would agree with.

Like I said, do not believe the hype written by these guys. Tweaks system is mid-fi at best, there's not a single piece in his system that's considered a Class A component. He has nothing to compare to a good sounding system (ie. no point of reference). What do you expect for a stereo module (1200AS2) that costs $300.

Maybe you forgot what the word sterile means (unable to reproduce). This has nothing to do with a preferred sound. After 10 minutes of listening, I had to switch amps because the sound was so flat, boring, and lacked real dynamics. It was like a big round hole in the soundstage between the speakers - there was just too much information missing.
Viber, why don’t you order the PSA m1200 and see for yourself?

PSA have a generous return policy to get your $ back if you don’t like them, which I suspect you wouldn’t, but you seem pretty convinced that they are amazing for your tastes, I guess based only on the Fremer review since I doubt you’ve heard the m1200 as they are not in dealers showrooms.  Pretty much the only way to hear them is to know somebody who has them or order them yourself for the test trial (or at a show, but shows haven't happened since pandemic).

I believe purchasing on a trial period with guaranteed return if unsatisfied is what you advised WC to do many times previously for various components, until finally he told you dozens of times that he wouldn’t buy and return, not his style.
i dont think viber will respond to any of the questions above... He will wait for a question that he wants to answer and skip the ones pending...
A few topics.

First, obviously, the Wilson people say that, "the Alexx won’t play as big, won’t throw the immense presentation, the scale, the muscle, etc, etc. The laws of physics are in full effect when you look at the physicality of the XLF."  I wouldn't dispute that the XLF is bigger in sound as it is bigger physically, but if someone values accuracy/precision/focus, that is another matter.  As I recall Fremer's review, he found the bass on the Alexx tighter, with the Alexx overall a more accurate speaker than the XLF.  Fremer has a tiny room so the Alexx may be a better match.

Next, the PS Audio M1200.  I was fascinated with Fremer's review, but I am held back because I don't like any euphonic aspect which could be from the tube input stage.  Like kren0006, I read some user reviews that said it is somewhat warm and nonclinical.  PS Audio does have a reputation for good accuracy with some euphonic character.  Paul MacGowan states his reference is the 7th row center concert hall seat.  I have spent lots of time in many seats in many halls, and will say that the 7th row is a very laid back sound compared to closer.  Note that microphones are usually positioned at a distance corresponding to the 1st row, so someone who sits there can go home after the concert and listen to a recording and then get an idea of accuracy to the recording.  I only like the 1st row, and even the 2nd row is quite rolled off in HF compared to that.

BTW, when someone says something is sterile and clinical, they are probably in the euphonic camp, since "clinical" and especially "sterile" has a negative connotation to them.  But if we hear the same things, I would call it "accurate" and look favorably upon it.  Their "sterile" is my "accurate."  Too many audiophiles spend lots of time at shows and dealers, and not enough time with natural unamped live sound.  They don't realize that live sound is quite raw at times, but all speakers and components add varying degrees of fuzzy warmth/veil/dullness.

I appreciate the time and investment that Jay puts into his pursuits and putting on a great show for us here, so I respect his decision not to buy stuff we are interested in, and compare to his gear.  He has integrity not to engage in 30 or 60 day trials and then return the items.  He has a reputation to protect.  Even the more neutral stuff he likes, I would probably find somewhat euphonic.  This happened with current Merrill GaN amps which we both heard at home, although he heard the flagship 118 and I heard the 114 which is of similar character, according to Merrill.  At first, he found the Gryphon Mephisto to be ultra neutral, but then found that the latest Boulder was even more neutral.  Then Mike at Suncoast Audio implied that the Boulder amps are smooth and maybe even tubelike compared to Soulution, which he described as more raw  in character.  This correlates with Jay's finding of the latest Boulder tonality as not sterile, unlike the prior series.  All in all, my assessment of Jay's overall taste is middle of the road between detailed/accurate and tubelike/euphonic, perhaps slightly skewed toward detailed/accurate.  My stand is at the furthest end of the spectrum at detailed/accurate.  I have long experience listening and judging for myself, so I wouldn't learn much if I sent Jay anything.

I only mentioned the PS Audio lately to inna and perhaps others who would be interested in a reasonably accurate sound with a little warmth, at a very cheap price.  Most people here are on a reasonable budget, don't buy/sell like Jay, so are free to do those 30/60 day trial offers. BTW, Fremer appears to have tastes much like Jay.  His reference is a DartZeel amp, which he admits is warmer than the PS Audio.  He loves Wilson speakers, but not electrostatics.  He is an analog guy who likes detailed cartridges like Lyra, but finds ultra revealing cartridges like the Rega Apheta too raw for him.  Those are his assessments, not mine, since I never heard any of those cartridges in my system.

Finally, Jay, I again think that you ought to at least try zip (lamp) cord, no. 16 or 18.  Only a dollar or so, nothing to worry about.  Steve of GTA confirmed that my zip cord was more lean/immediate/forward sounding and detailed than his speaker cables.  I was there, and it took seconds for him to say so.  In his system, he likes his cables, and he caters to his customers, most of whom like the same.  I can envision a scenario where a client comes to you and says, "my system sounds dull, bass heavy/fat and rolled off in HF."  You can delight him by recommending zip cord for speaker cable, which will make his system more lively.  But of course, try it yourself to hear what it does.  Yes, I know zip uses poor quality materials, and I don't know why it sounds so good in the ways I describe, but I just want practical results.  You seem to have more of an open mind these days, which may be due to your developing consulting business and YT presence.  Of course, if your client wants to show off expensive prestigious components and doesn't prioritize high performance which may be found at cheap prices, you know what to recommend.