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
Just 4. Most colds are caused by rhino viruses. More than 100 of those. And some other viral types, too. Hence no "common cold" vaccine.
Went back and listened to a bunch of the videos of Alexia2, Stella, Magico and 20.7, across the different songs (not necessarily straight-up comparisons across common songs, but rather an amalgam). 

I like ron17's analysis - can't really argue with any of that.

But for me I'm not so focused on the things he was.  I went into it not even knowing what I wanted to focus on.  I just let the presentations guide me and tried to ID the biggest differences I heard - probably at the end of the day this points me to those things that are most important to me.  Plus I'm kinda hungry right now and wondering what I'll have for dinner tonight, but I digress.

What really stood out across the presentations was the difference in dynamics and what I'll call muscularity or slam.  That kick you in the chest slam that just grabs you by the throat and says, listen up mf'er, this is how the music is supposed to sound.  Anything else, just take that weak sh++t and move along.  

If a speaker doesn't have it, and I mean really have it, it cannot rise to the top for me.  All of the other stuff (tonal balance, clarity, coherency, soundstage, imaging, midrange, treble, bass, balance, ....) is important too, even necessary, but dynamics and muscularity is a deal breaker for me if it is missing.  For others, it won't be as important.  I think though, for WC it is just as important to him as it is to me, and I think his speaker choices and length of ownership bear that out.

So, let's describe it in terms of a restaurant analogy.  Wait wuh?

20.7:  This is the little known restaurant you book with your wife, not having high expectations, but you get there and it is all a lot better than you expected it to be.  The food was good, as you expected it to be, but the ambience and fun factor was much better than you expected.  The service was top notch for what you are spending - good experience.  You leave having had a great time and you will be back.

Magico:  This is the highly regarded Mexican restaurant that you've been hearing so much about, and you have high expectations.  But you get there with your wife and the menu that is handed to you has all Indian dishes.  You're like, WTF??  But you order anyway and the Indian food isn't bad, not great.  But the weird thing is the entertainment is some hula dancing team.  None of any of it makes any sense.  You leave going, what just happened here??

Stella:  This is the black tie steakhouse, all formal, little stuffy.  You and wife enjoy a fantastic meal, and the entertainment in the corner is a violin player, who is very good (technically really, really good), but, you know, it's a violin player.  You look around, and everyone is sitting properly at attention, some watching, some looking at their phones.  The music isn't very loud, and it seems overly polite.  You leave thinking, well, that was really expensive, and the food was great, the entertainment level was I guess okay, and I think my wife liked it a lot, but ...... just not really my style.

Alexia 2:  This is the top BBQ joint in St. Louis or Austin, with the best rated ribs and brisket in the country, and the entertainment for the night is a kickass blues band.  You and your wife enjoy an amazing BBQ spread, you eat and drink way too much because it is just so good, and then the band starts and everyone in the place starts dancing, the drinks are flowing, the music is loud, and by the end of the night everyone is fist-bumping each other.  Somehow your wife ends up on stage and is belting out an Allman Brothers Band classic, and as the night goes on the playlist gets heavier.  You leave thinking that is the best damn time I've had in a very long time.

Give me Wilson all day, every day.  It's the only one of the four that put a huge smile on my face.
@kren:
i love the analogies thrown in there. Nothing wrong with how you feel about Wilson - IT IS A GREAT SPEAKER. 
Every speaker i have had over the last 4 weeks (i think) really boils down to PREFERENCE. Nobody can argue anyone as to why their speaker is superior to the other because some might have different boxes that need to be checked off first. In your case, you like the dynamics and muscle which i also like. I will be giving my personal view based on ownership and of course this is my opinion - nothing else.  

Wow - now that was something special!
I have to admit, I was never one for the analogies. They just didn't compare well (for me). But kren0006 just brought the house down!
Still true that point for point the analogy doesn't directly mesh directly with performance - but man do you get the vibe and character of what's being communicated / conveyed!
I re-read it twice because it was so good and I'm still impressed!
Well done kren0006 - well done!