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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
pokey77
1,265 posts
 
@techno__dude
Seems you revel more in making a scene than in playing cordially with WC and the folks on this thread. The idea broached above concerning working on your internet civility demands your attention.

@whitecamaross 
FYI - I have not heard Alexia 2s with subs, but like @Kren0006, have heard the Alexx, and also the XVX, with the Wilson subs. It is amazing what they bring to the game. Though I don't own any of the three speakers, I've heard all three many times as they are located about five miles from my home. Not with Gryphon (would like to), but with D'Agostino and Pass and maybe the Luxman separates. I've also heard at least the Alexia 2s with T+A, which is also pretty special.
jays_audio_lab's avatar
jays_audio_lab OP
5,381 posts
 
Video being uploaded as i type this. I will be talking about the Fyne Audio, Vivid Audio and Gryphon Essence that i had the pleasure to hear over at Suncoast Audio. Stay tuned

PS: i have videos of the Gryphon Essence driving the $140k Estelon Forza speakers, Fyne Audio F1-12 and they will be coming out throughout the week. 
jays_audio_lab's avatar
jays_audio_lab OP
5,381 posts
 
https://youtu.be/rDsIljok2vc
viber6
2,445 posts
 
WC,
I cringe when I repeatedly visualize the laceration on your left hand from lifting amps with sharp heatsinks.  Use thick work gloves, please.

I really don't want to take sides and stir up controversy, but techno_dude merely made a factual comment about how the power you now hear could be due to the new speaker or new amp, or possibly both.  

Your journey is very picturesque and appreciated, but it would be even more meaningful if you settled down a little, stopping to smell the flowers, getting to know your components in more depth.  You still haven't rated the Merrill.  I hope you do that, and present a video music A/B of the Mephisto vs Merrill, a battle of the M's.  Nominally, the power rating of the Merrill 118 is greater than the Mephisto, and even my small electrostatic speakers let me appreciate the power of the 114, which is still only half the power of your 118.  But sound quality is more important, so let's hear this shootout.  This shootout would be more informative than the first 3 top things to do.  Items 4 and 5 are still the most important priorities, since they are about getting the most from the new speaker.
jays_audio_lab's avatar
jays_audio_lab OP
5,381 posts
 
@pokey77

Interesting about the Alexia 2 with subs. I gotta tell ya, in my room it feels as if i have subwoofers playing. The bass is incredible and deep DEEP. I guess it all depends on the room to be honest, but for most people i can’t see why they would want more bass.

I wanted to add a few more impressions from listening today for about 4 hours at about 80db

1. Either the Mephisto or the Alexia 2 have easily shown me that stilpoints under the Momentum HD preamp were adding some brightness to the presentation.
2. I can hear more bass come out of some songs on High Res QoBuZ than if i play the same exact song on MQA on Tidal. That said, MQA seems to have more decay, a tad more information than the High Res version of QoBuz
3. Using Nordost Odin 1 PCs on the DCS dac/clock makes the presentation 2-3 times clearer, more resolved than if i use Audioquest Hurricane, but sometimes there is "bite" depending on the song and/or volume level.
4. I have an easier time detecting system changes with this Alexia 2/Mephisto combo than any other system i have owned. It feels as if i am now capable to tell you "hey, this cable has less bass than this other cable" or "this cable has less resolution, nuance, etc" than this other one. It feels easier to tell without having to try HARD AS HELL which is what i had to do sometimes with my most recent speakers.
5. Those damn stupid filters on the DCS dac don’t do a damn thing
6. The "dither" buttons on the DCS clock are now "alive" for the first time. i did not think they did a damn thing, but now i can hear that they feel like they "recondition" the music or "reconstruct it".
7. FOR SURE, the Colosseum is more forgiving than the Mephisto. NO QUESTION, NO IFS OR BUTS.
8. On the Mephisto, bad recordings sound like bad recordings on steroids (worse than on the Colosseum)
9. You can buy a Colosseum, bring it home, and it will play nice with the rest of your components. It will try to make the best music possible  within its limitations of course
10. If you bring a Mephisto home, it will tell you "your floor is dirty, it stinks in here, this room & cable sucks ass" and it will NOTICE EVERYTHING you own. It does not give a damn. For instance, it just easily allowed me to hear how inferior an Audioquest Hurricane PC is on the dac when compared to Odin 1 PC. 


The mephisto/alexia 2 combo in my opinion seems to be more balanced/resolved than if i had the sasha daw/mephisto.
Here is why: if i had the DAW, i am sure i would still have bass and possibly more bass if matched with Mephisto than it did with Colosseum, BUT i could never reach the depths or the true potential of the bass control of the mephisto because the DAW did not dig as deep as the Alexia 2.
I feel like the Mephisto is too much amp for the Sasha DAW. It would be like having a car that can go 220 mph, but you don’t have enough open space to reach 220mph. You run out of road before you get to 220mph.
I STRONGLY BELIEVE, the Colosseum is the perfect partner for the Sasha and the Mephisto mates with the Alexia and above. That said, this does not mean the Colosseum won't work with the Alexia (it does). 




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