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
The mcintosh c1100 and 601s is a great light show for the 4th of July.
Not to mention, there is a 6 month waiting period to get anything fixed at Mcintosh. i remember ordering just the front glass for a preamp and they told me to make a line and wait about 6 months... Yep...

As far as the entire class d vs class a vs class ab:
Look, at this price point, it is all about how "ripe" you want your music to be. Some people like their steak to be rare, medium, medium-well, etc and that is essentially what this is about. To say that class d has not closed the gap is just stupid. Class D has made a HUGE improvement that i am actually the owner of Rowland 925s for a reason. That said, the better performing class d amps are NOT cheap because those few manufacturers that know HOW TO BUILD a class d amp are right now making their money for the time invested into building a better design. It is no different than when Viagra first came out: Pfizer made a killing from it because they needed to pay for everything that went into research and development and make money of course, but now you can get generic viagra for less.
My point is that eventually more manufacturers will begin to make cheaper class d that will sound outstanding and this will indeed end up making other manufacturers jump into the class d world.
The Merrill 118s are AMAZING, but one could argue that maybe the 116s are just as good and cost you 14k less? Granted, i am one of the few people that would need the 118s because of my massive Neoliths.
i am telling everyone that i am in deep thinking mode and over the next couple of weeks i could end up with Merrill amp?
The one thing i can disclose to ALL OF YOU is that Merrill is obscene bang for the buck and it has made me wonder HOW MUCH are we being ripped by other manufacturers charging far more money for something that does not even outperform it.
I had 2 people come over this weekend and i had them listen to the rowland 925s and the Merrill and both said that they cant justify paying 60k for the 925s after hearing the Merrill. I would totally agree.
I know Jeff is currently cooking up a new top end up which should be out by the time Axpona 2020 comes around. oops...you did not hear this from me... :)
What amps do i miss right now? the block audios and the Constellation Centaur 2s. However, this Merrill actually makes me VERY NERVOUS and do you want to know why? because i am afraid of it beating other amps that i have personally owned and knowing that that is Merrill costs FAR LESS money.
Unfortunately, there will always be those critics that do not believe in class d which is totally fine. There is also the potential issue of poor resale value with a class d amp, but i suspect the Merrill Element amps won’t suffer from this simply because it could very well be the very best class d right now.
I have also spoken to Merrill and gave him my .02 cts and criticism (which i won’t disclose) and he totally agreed with me. One criticism was that they should have included aftermarket powercords which he said he thought about, but that it could have made the price go up by $10,000 because each power cord retails for $5k.
I hope to keep trying these amps while in my possession and use several powercords and xlrs and finally strap them to my Neoliths to see what the outcome is.
WCSS, we are also waiting anxiously for the Neoliths to be paired with the 118s and have the comparison to the JR925s. I know you are trying to get the Neoliths back in your system and new room, take your time and get everything right and let us know what happens. Can you tell us what preamp/s you have been using with the 118s and JR925s?
I have been using the Merrill Christine preamp. I need to use the Rowland corus with the Rowland PSU unit to see if the outcome is any different. 
Wow guys, you all aren’t giving the Dynaudio c4 platinum any props huh? 
Yes the Neolith might end up making an entrance in the room very soon. It takes 3 people to get them out of the living room. 350 lbs per speaker and they need to be lifted off the ground and brought out in a complete horizontal position. It’s a production to get them out which is why I’ve waited to do it. 
@whitecamaross
You haven’t said anything about your thoughts on the Dynaudio C4, except that you moved them out from the wall and they sound MUCH MUCH better.
I think we were waiting for you to tell us.
Ok here is my immediate impression of the c4 platinums with Rowland and Merrill:

1. Dead center mids. They are literally in between the speakers. 
2. Smooth highs with zero edginess 
3. Bass is there although not at the level of the Neolith which is expected but it doesn’t lack oomph 
4. Very tricky to place. They tend to be finicky about placement but if you take the time to move them around I think you will
be rewarded big time. 
5. What’s it missing? I’d say it might lack depth and the sense of space that some other speakers have. However, it’s a good speaker given the used market value.