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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
dguitarnut
136 posts
 
Viper666.......so tell us about your fantastic Carlo Robelli Violin......and how it sounds compared to the Guarneri.......and the modifications you made to it. Describe in your eloquent manner the aural qualities only you hear from your comparatively modest instrument . What gauge lamp wire did you use for each string? Any fuses involved? Built in Rane? I can’t wait to hear about the bow. 
Post removed 
viber6
2,445 posts
 
dguitarnut,
Seriously, there are many violinists who obsess over many things.  The materials used to make strings all have different sound.  We have all experimented with different brands of strings.  The position of the bridge, and the soundpost inside, in relation to the bridge feet.  The height of the bridge, which affects the tension on the strings and the comfort of the player when pressing the left fingers on the fingerboard.  Also, the springiness of the bow on the strings.  How tight the bow hair is, affects the ability to make a smooth sound or play fast pyrotechnics.  Some violinists have subjected their instruments to major surgery like taking off the neck and re-angling it, or thinning out the top plate undersides to alter the tonality.  Even with optimal adjustment of all these factors, it is interesting that the resonance of the bow interacts with the resonance of the violin, so that there are slightly different tonalities with each bow/violin combination.  

As a guitar enthusiast, you probably know about all these things.  But despite everything I just mentioned, the difference between one violin/bow combination well set up, and another violin/bow combination well set up, is far greater than any single combo with all the variable setups.  This is analogous to how the speaker in an audio system is the dominant factor which makes the sound.

My perceptions of the sound of an instrument vary tremendously depending on how far my ears are from the instrument.  I hear the sound of someone 3 feet away playing his instrument, but when I ask to try his violin, I am amazed at how much more I hear under my ear and its radically different character than I heard from just a few feet away.  

Relating to how the monetary value of an instrument has little relationship to its quality and sound, when heard from a reasonable distance, I'll tell of an experience I had.  I went to the shop of a famous modern violin maker named Sam Z, to try out some of his recently made violins.  The price for his new violin was $30K, when the typical price for a typical Chinese or Polish maker was $3-5K, and $10K for most American makers.  I did think that Sam's violin had better tone than typical new violins, but it was still no match for many of the great 18th Century violins I have played.  But I have also played many mediocre sounding $100K old instruments which were inferior to Sam's.  Some time later, I went to a concert of a string quartet, sat close in the 1st row, and listened to the sound of the 2 violinists in the group.  I thought they were both of excellent comparable quality.  After the performance, I asked them each what violin they  played.  One played a great old violin, and the other played a new Sam Z violin.  Boy was I surprised and fooled!  From even a close distance of 10 feet,  the Sam Z violin sounded much different than when I played a similar Sam violin.  And this $30K violin had similar quality of sound when heard from 10 feet to the $300K violin.

There are a few morals of this story for the audiophile.  One, don't judge a live concert sound from a distance of 50-100 feet, proclaim it is the ideal, then go home and adjust your system to make it sound like that.  The recording was made with close mike distances, so the live reference sound is the same close distance, roughly the 1st row at a distance of 10 feet or so.  Second, understand that money has little relation to the quality of sound.  There are cheap speakers and electronics that sound better than many expensive units, and there are also expensive items that sound better than many cheap items.  As mrdecibel just said, even cheap amps are readily capable of revealing differences in cables, etc.

jays_audio_lab's avatar
jays_audio_lab OP
5,381 posts
 
Yes but these cheaper amps don’t do the same job at articulating the differences.
You can go buy an emotiva amp and then connect the cables I have and switch back to blue jean cables. I am sure you will hear a difference but can those emotivas do the same job as a top end Amplifier at describing to you the different shades in tonality? Can it pin point exactly what happened to the sound, line item by line item? I don’t think so.
Just because a cheap amp can tell you what happened when you switched cables does not mean it can tell you the whole story of what happened. The better the design and the amp, the more it will tell you what Is happening when you make changes as long as you have the speakers that can tell you this too.
viber6
2,445 posts
 
You are mistaken.  My cheap Mytek and Bryston tell differences at least as well as the Merrill 114 and the expensive Viola Concerto amp I tested.  Possibly better, since the Merrill and Viola always sounded sweet, no matter what they were fed.  But the transparent Mephisto, like my amps, tells you more than euphonic, sweet amps.  Money is irrelevant.  Please stop promoting the high end salesmanship myth that more expensive reveals more things, is better, etc.  Just describe what you hear.  Thanks for just that.

No matter what you have, cheap or expensive, careful setup will always bring more benefits.  That's the main value of a high end dealer, compared to online remote sellers.  Sellers of cheap things often don't offer the helpful service of some high end dealers, because the mass market high volume nature of the business precludes quality guidance.  But cheap things deserve the same care as expensive things.
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