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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
fsamb
5 posts
 
@whitecameross, make sure you stop by the JTR demo room in Nirvana C at AXPONA while you’re there. JTR will also be the ones providing the speakers for the live music concerts at the event. I think that you will be impressed. Unfortunately, work will keep me from attending.
mrdecibel
3,063 posts
 
viber, too much detail ( pun intended ) about all of the modifications I do. Liked the Lascala better, because the mid horn has a longer throat ( Khorn and Lascala use the same mid horn, Belle, a shorter horn ). One of the many reasons production of the Belle came to a halt. WC.....I just spent time looking over the exhibitor list for the Axpona show. A large turn out, with many interesting and promising speakers and designers. There are even some non horn speakers that caught my eye, as I think you will be quite busy. Saturday evening a live concert by Shelby Lynn, and so much more. I used to love being at shows, both as an exhibitor, and as a patron. As far as JTR speakers, I do not think they will be your cup of tea, partly because your room will not allow proper distance between you and them, and they are not a full range horn ( they are a hybrid ), as the Vittora. Just my opinion. Always exciting. Enjoy ! MrD.
dep14
336 posts
 
Closest to live sound, and I do love rock concerts.

Horns - will give you the impact, snap, and feeling of being in the front few rows most times.  I've owned several horn speakers from Klipsch and JBL, and I've demo'd the JTR's several times (they are nice).  I've heard the Volti's also and they are a lot of fun.  Downside to many horn speakers is the bottom end doesn't always have Impact (the JBL M2 was an exception).  So, integration of a sub is important and I've never found I can get it just perfect.

Semi-Omni Polar - Ohm Walsh (not the originals, but the newer ones that use a tweeter for the uppermost regions) - Give more of the spaciousness and soundstage of a live show, the bigger ones have tons of low end.  But they don't have quite that snap that a top notch horn has, the flipside is the bass is better and typically you can listen louder as they are not a bright speaker.  Also, don't have to be right in the sweet-spot to have a nice image.  While I don't go to many classical shows, man the Ohm's do it right.  I feel like I'm a little further back in the crowd.  Currently I'm using Ohm Walsh 5000's.  

Omni-Polar - (MBL) - in the right room and set-up can be awesome, but I've heard incredible demo's and mediocre demo's.  I've never owned.

Otherwise, a good bi-polar design or open back design (like Jim Salk has options for) can do a nice job adding some spaciousness.

I know many say " a good speaker should do everything right " which is somewhat true, but a studio monitor and a good concert speaker IMO are two different things.  

Right now, I'm digging the OHM's, they are a happy medium and they are far from perfect but they do a lot right for the money.

But, gun to my head and I had to pick a speaker that could replicate a rock concert the best... JBL M2's with the EQ set-up properly.  Ironically some do use the M2's for studio work.  They are a hell of a speaker, but they are designed around pro amps and DSP.  The nice thing is with the DSP you could play with the curves.

Where I think the OHM's beat a good horn - bass and that HUGE feeling that a concert can give you when synth's, guitars, drum's, everything is just sounding huge to where you feel it in your chest and pant legs.

Where the JBL's and other horns might win out - that ultimate "snap" of a snare drum, vocals way out front and piercing at times, and that last bit of crunch from a Les Paul through a Marshall Stack.  Downside is they can get bright at concert levels after a while.

Note - If I was someone who wanted every last little precise detail (say Viber) not sure I would look at either speaker, or an electrostat either.  I might actually look at the Persona's (which I respect but don't care for as a speaker).

The JBL M2 might be the one exception.  Amazing speaker, but with a lot of caveats.





viber6
2,448 posts
 
dep14,
Thanks for your informative comments about different speakers.  It is telling that you found the Persona's more detailed than an electrostatic.  Which stats did you hear?
philharmonicpete
25 posts
 
Viber, you are the only one who gets it.  No coincidence that we both know what an orchestra sounds like close up.  I love 4th row center.  From that seat there is almost no imaging as one hears from a stereo system.  Yes, one hears left-right, a wide spread from say the violins on the left to the cellos and low basses on the right.  There is very little front to back depth.  If you close your eyes you can sometimes tell that the brass and percussion are in the rear but not always.  When a solo oboe plays there is no pinpoint location at all.  The sound radiates large and there is no way to localize the instrument.  Listen to a Steinway grand playing a piano concerto.  You don't hear a small sounding piano located in front of the orchestra.as in a typical recording.  Again, it sounds huge with no localization.  The imaging effects heard on a system are really artifacts of the stereo recording process.  Yes, the dynamics are incredible.  I'll never forget at one concert when the orchestra was being driven very hard by the conductor the lady in the seat in front of me kept on whispering "it's too loud!  it's too loud!"  I tried to simulate these massive dynamics with both Klipsch and Avantgarde horns.  It was a total waste of time.  Even the horns fall hopelessly short in reproducing what the dynamic range of an orchestra should be like.  Another waste of time is to try to reproduce the low bass of an orchestra.  It is shocking to me when the low basses play.  Take a simple pizzicato plucking from the low basses.  A gigantic thud crosses the concert hall with such power and authority.  You have a simple pluck that yields a massive thud.  Just amazing!  No stereo can do this.  Even the bass horns are hopeless in trying to recreate this effect  So as Viber has hinted at all along the only thing you can do is to try to get clarity.  This also is incredible at a live concert.  You hear subtle shadings and nuances that is lost on almost every system.  Just look at the score that the musicians are reading during the concert.  Tons of detail, most lost on a typical system.  At least ESLs and full range ribbons attempt to get this clarity and detail.  Even the Quads which are very deficient in bass and dynamics try to do this.  Sorry for the long rant but I'm afraid most audiophiles don.t reference to an orchestra at close range.
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