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!


jays_audio_lab
WC,
I strongly disagree with the concept of company synergy.  You happen to prefer the Gryphon Mephisto with Gryphon VIP cables because of the softening/mellowing effect compared to the Nordost Odin/Valhalla.  Someone else or I might prefer Nordost because it would maximize sparkle and other things.  I suspect on the Mephisto, you would also prefer other softening cables like Cardas, Ansuz, Wireworld, compared to Nordost.  Perhaps the Ansuz would produce a fabulous result for you, maximizing the sparkle/focus while giving just enough softening to take away your unease with the Nordost.

In the end, a company team has their own concept and preference for how they want their products to sound together.  Carried further, Gryphon might think that it is best to use their entire product line, including the speaker.  However, you might not like their speakers.  If you were listening with their team in their rooms, you might prefer other ancillary components with their G speakers, and the results might be different with even each G model.  They would likely be different with your Wilson.  Soon you will try all this on your Maggie 20.7, and the results are likely to be different as well.  

If you presently think that your present combo is the ultimate, then you might as well shut down the entire thread, because nothing else can be quite as good.  You will have locked yourself into this 1 combo of ultimate synergy.  Of course, this is absurd, and you likely will find other speakers better for you than the Wilson Alexia 2, and then you will have to dump all your present synergistic components, and discover the magic with only one set of new synergistic components to go with the new speaker.  Again, absurd.  Even with your present setup, the ideal setup would be different depending on the quality of the recording.  For the most natural recording like Perhaps Love, you might prefer Nordost + Mephisto, but for most lousy processed recordings where the Nordost shows the defects, the Gryphon VIP would be the best.  Another factor is your moods from day to day.  One day you may be stressed out and then prefer the softening effect of the VIP.  Another day you are happily excited and revved up and may prefer Nordost.

I have it much easier, because all my components are chosen for transparency/clarity/brilliance as the overriding factor.  If I get a new speaker, I won't need to throw out my present components and get completely different ones in order to get some magic synergy with the new speaker.  Whatever characteristics of the new speaker, I will still seek to maximize those factors I value, so my present ancillary components will still retain the good results I have.  

Don't say that my cheaper components are not as revealing as your more expensive ones, so my reasoning is not valid.  I assure you that this is not the case.  My Mytek has far more sparkle, etc. than the Merrill I tried.  The Merrill has other qualities than other people would prefer.  It has more expensive parts than my Mytek, but the different design concepts make it sound different, not the expensive parts.  

With the critical performance of cars, it is likely that more expensive, finely tuned parts improve the performance.  The same is not necessarily true about audio electronics and cables.  Even with cheap cars, you can't put a round peg into a square hole.  The design specifies that only certain parts will do.  In other areas like drinks at clubs, it is a total farce that the same drink in a modest restaurant costs $5, but $30 in the fancy place.  The talented bartender when he was working at the modest restaurant got a better offer at the fancy restaurant, so his same magic recipe now fetches $30.  Of course, the real reason it is more expensive, is the artificial social image of the fancy place, with more money needed to create the fancy atmosphere, the larger space with more overhead, etc.  

More basic than all of this is the overall issue of money--assume there is a hypothetical rich guy who is prepared to spend a million bucks on his total system.  He might still appreciate and prefer the sonic qualities of a small cheap speaker like the Paradigm Persona B or a large cheap speaker like the Tekton Moab. But after careful listening and study of the market, he may decide that the DCS Vivaldi offers the best performance, and he spends big bucks on that.  He may prefer the particular sound of the entire Odin 2 loom, and say it is worth spending for that.  On the other hand, he may decide that he doesn't like the sound character of the $250,000 Relentless, and prefers the sound character of the $2500 Mytek.  Money may or may not buy audio happiness.
Viber I do think better parts can and do indeed make a difference. The end result boils down to how they’re implemented. If this were not true, there would be a slew of Chinese knockoffs of the high end equipment, that sounds identically because they copied the circuit designs using much cheaper components. Price alone of course is not a reflection of a good end result. 
Something needs to be said about people liking a particular group of components and how they unite to create music.
For instance, I was talking with someone yesterday (not going to name him) who has the Gryphon pandora and spectral Preamp. He said that to him, the Gryphon pandora sounded bright but smooth at the same time. He had high expectations for it and he is returning it. that said, his source is dcs Rossini, wilson Audio alexia 2, a krell Amplifier from the 90s (don’t know the model) and cables along the lines of the middle of the pack cardas or old generation transparent cables.
First, I want to be clear: that is an approximation of what he has when it comes cables. It isn’t at my level or whatever you all could consider to be high tier group cables.
Ok so he said he prefers the spectral Preamp over the Pandora because it has more resolution, Information, but he also said it is bright and it doesn’t make him tap his feet after listening to it for a while. Anyhow my response to him was that you can’t just drop a preamp or an amp and be said and done. He said that he believes he can pick up the house sound of any component regardless. So in short, he thinks gryphon is too much of a presentation or that the sound is like " guns blazing" all the time etc. I told him that was my feeling with mephisto and as I started to change cables then things changed. I also said many other things that I am not going to get into.
Anyhow, there are 2 ways of looking at his particular case:

1. He is right, the Pandora shouldn’t have to sound as it does and the spectral Preamp indeed Is his preference even though he also said it was bright after a while and never made it tap his feet. He said the spectral sounded way better even with his krell amp but he negates this comment by saying he brought in the Pandora because his spectral was too bright and not engaging.

2. He is trying to look good in a toxito and wearing fucked up shoes from 1990. He needs better cables and at least a more current Amplifier with more solution or better parts etc than a krell from the 1990s. (He could choose any of the current Amplifier offerings from any brand )



Which argument do you lean towards?
Viber last post is most probably his best ever to date on this thread. He hits it on the nail.

WC’s latest and most unusual extase for the Gryphon cables is just as always « ( specially coming from him) the meal of the day ».
Ask yourself guys why suddenly all this fuss about cables he would never have considered before. Only logic answer is ...Jays + his dealer + Gryphon all have interest in that sudden cable pumping...
I sold my Valhalla 2 XLRs here on audiogon...listed them and they were gone in less than 12 hours...so you are saying I sold a better cable and bought worse cables to make the mephisto sound worse ? Lol. 
So why am I not paying for the powercords and speaker cables ? Because I'm still trying to see what I do or if I prefer my Odin 1 speaker cables or powercords. I am STILL mixing and matching trying to see what happens even though this will be worthless once the Pandora gets here. For now, I'll have fun with it and spend time playing around until the preamp arrives.