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
I have not A/B'ed Ansuz and Nordost directly but have auditioned them separately.For the price difference obviously D2 wins against Odin 2, they are very close and i would say D2 is more musical and has more density with the transparency of Odin 2.It is also less bright than Odin 2.I've also heard Synergistic Research Galileo which really didn't blow me away.The best way if you are interested is to try to find an Ansuz dealer and get some on loan to try out in your system, this way you will know if they can suit your taste.I'm seriously considering D2 full loom for my rig, IMO it's the sweet spot in Ansuz line of cables.
If you have unlimited budget go for DTC or DTC Supreme which is supposed to be far better than Odin 2.Again this is all personal opinion.

WC's Wilsons sound much clearer than at a well known dealer.  I hated their muddy quality in a modest sized room where they were close to the front wall.  (This was also true of Avalons close to the front wall).  In their larger room, a larger Wilson was well out into the room, and sounded much clearer.  It wasn't due to the larger Wilson, but due to room placement.
pretty strong comments @goodsource
how do these “many dealers” describe “even an ansuz c2” as “far better” than odin? sincere question and particularly curious in light of WC’s finding
Odin 1 xlr is better then ansuz c2 xlr. I have owned both. 
I like playing with my Wilson speakers out from the wall. Shows don't have the space in their rooms to do what I do because they need to accommodate a bunch of chairs. Having enough space behind the speaker allows for more depth and feeling that there is no wall behind. 
@viber6. i have the same question on ansuz. many dealers who carry both ansuz and nordost say that even an ansuz c2 is far better than odin 1

@whitecamaross or anyone has any thoughts on ansuz vs nordost. c2 vs valhalla 2 or c2 vs odin 1 or odin 2
@carey1110. @whitecamaross
thanks for clarifying on alexia’s superior performance compared to DAW.
Jay/WC
one thing which intrigues me that yours is the only setup i have seen where you place the speaker so much away from wall.
90% of daw and alexia setup photos and rooms and including dealer listenings rooms, i have not seen anybody place this far away from wall.

i agree that odin1 is better than odin2 in price to performance ratio.
but in true price/performance ratio even odin1 sucks along the spectrum of cables.

Jay/WC, Based on your experience with various cable which cable or cables models (power , Speaker and XLR ) do you think have the best price to performance ratio , especially i meant cables for sasha daw and alexia

I don't disagree with people's personal choices when it comes to speakers because it is about WHAT YOU HEAR and sounds BEST to YOU. 
That said, having owned a lot of different speaker brands, i have always been impressed by the Wilson "jump" factor. It has huge dynamics that very few speakers have. When you dial in a Wilson Audio speaker properly, it is incredible, BUT it really REALLY needs the right room. 
As far as looks, that is also subjective, BUT it certainly does not have the wife approval factor. I will not deny it, but neither does the b&w. 

I am a panel person at heart if i am being honest, but panels are HUGE and take up so much room so i understand why some people don't want to deal with them. 
Lastly, and as a FYI, it does not break my heart if people hate Wilson Audio for one reason or another. I am not married to it so those comments really go right over my head. Today i have Wilson and Magnepan and next thing you know i have Fyne Audio, Vivid Audio (again), etc. 
tonights video will be about answering some of the questions i have been getting on youtube. Stay tuned for that. I also talk about Mcintosh and my opinion of the brand. You won't want to miss it!
A well known audiophile in Montreal ( he died a couple years ago doing his passion which is moto , may he rest in peace). He had a pair of Wilson Alexandria coupled to a pair of Thor subwoofers. Only the best in dac, amps , turntable, etc.
Well on e day he decided to sell the Wilson. He replaced the with the best Bower & Wilkins and never turned back. 
I believe B&W is really just a superior maker than Wilson, as they have done more research and development producing the best in house drivers in the buisness. And Wilson are just plain ugly,  no design , just a stacked boxes look...
thieliste,
According to your own listening, what is the tonal character of Ansuz cables, any of them?  Have you A/B'ed against Nordost?
Odin 2 pc Is better than Odin 1 but I didn't really make sense to do Odin 2 unless you do the full loom. I believe Odin 2 is amazing but Odin 1 is probably the better price/performance ratio. 
I'm almost 30 yrs with a couple of Wilson Audio speaker models. I've spent hundreds of hours playing around with positioning in different rooms (moving from one home to another), and I would still consider myself to be a novice.
Two months on my Alexia 2s and I’m just starting to realize and anticipate what a difference 1 inch will make to the right, left, front,  back for each speaker etc. The skill comes when you can anticipate what the change will be before you do it, Im not quite there yet. So it does take a while to understand and learn what each movement will do , in your room, to your soundstage, tonal balance, Imaging,  bass response etc. Ie: Depending on your room moving the speaker an inch will effect everything slightly.  Sometimes slightly is all you need.   Ported speaker like dipoles can be tricky.  This is both science and art. The science part is easy but the  art of it takes time and  talent.  I’m still a novice but learning is the fun part. Whitecamaross has quite a challenge because he uses a lot of different cables and electronics which are other variables that can also affect speaker placement as well.  Takes time and work but the payoff is there. 
@abedirov  Check out Ansuz D2 series of cables, it's pretty much Nordost Odin 2 level for less money.

@golfnuts   

Youre right. I am sure I'll keep playing around more with their positioning. I am not done but I feel I have found an improvement with that I did last night. More will be done as they get more playtime. 
@whitecamaross Have you had any experience with High Fidelity cables? I am now looking for a set of balanced ICs to go between my pre and Mephisto and a set of new speaker cables. I know, that  Rick Schultz had some issues with his speaker cables in the past, but corrected them with the current products. I tried an HFC Ultimate power cord some time ago and was very impressed with overall transparency and resolution of that cable.
What other brands of ICs and speaker cables can you recommend for Mephisto / Sasha combo?
Sorry Jay, but these last comments with regards to setting up Wilson speakers makes you sound like a novice still. Unless you're a trained and certified Wilson Audio installer, 5 hours is just getting started. Unfortunately, you'll probably move on to something else before finding the ideal speaker placement. It could take up to a month before you realize you need to move them again, because you haven't played enough music in there current position to be totally satisfied everything sounds just right. A lot of times this happens sooner than later (1-3 days), but you really need to run them through a lot of testing material before making any declarations. 5 hours would be an absolute dream for Wilson speakers.
Well, I just spent 5 hours moving the speakers around the room.
I made vast improvement and ended up with the Alexia being about one full foot farther away from me so I am now 11 feet away from them and they are 9 feet apart. The sound is HUGE, wide, smoother and the bass only hits when it should. There is no doubt that Wilson takes HARD WORK to set up. Having owned many other speakers, Wilson is hands down the hardest one to set up properly, but once you do...LOOKOUT!
They are still breaking in fyi so I am sure they will move a little more from their new position. With all that said, now it takes more power to open them up because they are farther away from me but I am glad I don’t have power shortages :)
No mephisto playtime today fyi. I have had the Merrill audio 118s on all day and night burning in the speakers.
Very soon we will begin to try the ARC REF6SE on the amps. I anticipate having about 150 hours of playtime on the speakers by Saturday night but they probably need around 400-500 at a minimum. Saturday could be a preliminary run but by the end of the month the Alexia should be right at around 500 hours which is when we will go full throttle. More to come !

@goodsource.
Don’t forget I owned the Alexia 1 before the DAW...I already had a reference point when I got to the DAW. The scale of the Alexia is one step higher than Daw. This scale includes the bass and massive bottom end.
I believe Carey owns Alexia 2 as well and he came from the DAW. That said, the Daw is amazing in many ways but in rooms that are too tall or deep, the DAW has no muscle there. 
Gentleman having owned the Sasha Daw and now own the Alexia 2 I can tell you without changing anything in my system but the speakers, they are night and day. Whitecamaross has stated the differences quite well. 
@viber6  
yes i agree with you. alexia has slightly better specs than sasha and even yvette has 10 inch bass driver.
since WC said alexia digs in way deeper, it would have been great if there was a chance to check daw with mephisto to see if the increased bass is out of the merit of mephisto or alexia. or if mephisto when mated with sasha daw can also dig way deeper as well or not.
goodsource,
Specs don't tell the whole story--we all know that.  For example, all amps are flat down to 20 Hz or lower.  When I heard the Merrill 114, it was much more dynamic and deep compared to my other amps, which are lighter in character.  Similar reasoning for speakers.  Aside from slightly more bass extension, the larger bass drivers of the Alexia vs the DAW may create more power and ease in the midbass.  In classical music which has deep bass in only a few pieces, most of the bass power resides in the midbass. 
@whitecamaross 
WC/Jay,
You had earlier commented that the bass in alexia  is way better and digs in a lot deeper compared to sasha daw.
are you  sure it is due to the speaker and not due to amp mephisto.
because you did not a get chance to try DAW with mephisto, right?
although specs dont fully matter, but if you look at the low frequency response of sasha daw its 20hz and alexia is just 1hz better and its 19hz.
which makes me wonder how if bass performance for sasha daw and alexia should not be night and day difference but a small incremental difference.
can you clarify your thoughts on this aspect.
I agree my system is very resolving as well and I absolutely agree with you when it come to symphonic music.  Trying get all the instruments clearly delineated along with the wood tone and harmonics is a real challenge.  I think a system that can resolve a large symphony can do just about anything.  Agree balance is key
carey1110,
Classical music is so complex that there can never be too much resolution.  All recordings have flaws, but higher resolution enables you to hear more of the good.  The trick is to be aware of the flaws, but look on the good side to show the intricate details.  As speedbump6 nicely put it, don't go for the lowest common denominator where both the virtues and flaws are thrown away.
If the system moves you Emotionally in the way live music does then you are there.  Hearing all the “music” is definitely what we want I agree. 
If you hear it in person and it sounds good, then it should sound just as good in your home. The exception might be when it’s too dry, and sucks the life out of it. Other than that, if it’s there in person, I’d like to here it in my system. If it had warts in person, then my system is masking it and therefore masking all music in order to deal with the lowest common denominator. I’m not a fan of that. 
The question becomes can a system be so resolving as to take the joy out of the music listening?  As the pleasure meter moves up with more resolution is there a point where it begins to move down if the resolution get beyond a certain point revealing the flaws of reproduced music.  Live music is the ultimate resolution but it comes with a pleasant emotional response. Live music is always our reference point isn’t it? I think Keeping this in mind will help when evaluating a system.  
@whitecamaross 

To clarify, I've not heard Alexia 2s with the Wilson Subsonic subs. But have heard both the Alexx and XVX with Subsonic subs. Subs are like $110k, so probably not really a good investment for Alexia 2s. I don't know what the Thor's Hammer subs cost or what they sound like.

I have heard the Alexia 2s with very large REL subs and DID NOT like it at all. This was at a dealer well inland from me, not my local dealer.
Those are the inferior component out of ayre...not good...no grip or balls. Their preamp is the star of the show. 
What about trying Ayre amps, instead of trying again their KX-R 20 preamp which was not onpar with the REF 6 SE last time you did a shootout...
WC the mephisto uses 2 ac cords but are they 20amp inlets like the merrill 118's? Just curious.
I asked about midrange and HF, thanks.  The Bryston 4B SST2 had more balls in bass than my 2.5B SST2, but was vastly inferior to the 2.5 in the musically important midrange/HF, at modest volumes, of course.
Bass- I don't think that I've had more control in the bass department than mephisto. The king prior to it was the Colosseum and I don't think it has more balls than mephisto since there is a huge power discrepancy in person...
Is the Merrill leaner than Mephisto in midrange as well as bass?  How about HF, warmth/sweetness?
Have you tried the SR sx power cord? Haven’t seen any SR mentioned, I’ve gone to a full SR setup, but no idea how that might compare 
More thoughts on mephisto Tonight:

1. If I plug the dac and the clock into the Niagara 5000 using nordost Odin 1 powercords, more detail shows up but also things get bright. If I just plug the dac and clock into the outlet using nordost Odin 1, there’s a little less air but brightness decreases significantly.
2. Mephisto makes the Merrill audio 118s sound less muscular and leaner on the bass which is a shock because I NEVER thought that until the mephisto arrived.
3. Audioquest hurricane Powercords work better on the amp than on dac
4. Odin 1 powercords continue to kill ANY POWERCORD I’ve ever owned when plugged into the dac. Odin 2 was awesome but I feel Odin 1 powercord is far better value.
5. Subpar cables sound like they are a 720p signal instead of 4k.
6. Buying mephisto only gets you the best ingredient but now it will be your turn to cook. No matter how good the ingredients are, if the cook sucks, so will the food..

I heard my Gryphon Colosseum with zena....in my room....I believe if you watched my YouTube videos you can spot the Gryphon zena...
Jay has mentioned before that gryphon preamps didn’t seem to offer the same levels of performance as their amps, or even other preamps. 
If it was for me and if i had the cash i would definitely pick CH's new top of the line L10 and not look back lol.CH CEO Florian said L10 is a little better than L1 4 box mono.
I would get the Gryphon Pandora because it’s made for the Gryphon amps:
When connected via Gryphon’s proprietary Green Bias Link to a Gryphon power amplifier with Green Bias function, Gryphon Pandora can control available Class A output, reducing power consumption and running the amp slightly cooler for less critical use. This feature adjusts the amplifier bias in relation to the preamplifier volume control for exactly the right amount of Class A power on demand as needed with massive instantaneous power reserves ready and waiting.
Sorta like why the Luxman amp sounds better with the Luxman preamp
Hi WC,
Would you also consider the Simaudio 850p?
Currently running it with the Sim 860a v2 monos.  Sublime.
A couple of things:
@thieliste
i agree with your statement above. It becomes a mission to find system synergy, but once you find it, it becomes spectacular and intoxicating in many aspects.

@speedbump
yes i agree that NOT ALL AMPS are designed to sound good with every speaker. For instance, i can totally vouch for the Element 118s and Wilson Audio Synergy. It is incredible how well they pair together, but yes the Mephisto might possibly be an amp that can force more speakers to sound better than most other amps out there.

@keithr
I am thinking of other preamp options, but as @thieliste said, at this level my friend there are not like a ton of options to chase. Here are preamps i have thought about:

Constellation Altair 2
CH Precision
Gryphon Pandora
EMM LABS (DAC AS A PREAM)
Block Audio Preamp
Ayre KXR TWENTY (YET AGAIN)
Pass labs xs maybe ?
That is one HELL OF AN EXPENSIVE preamp selection and the reality is i would go through hell to locate most on that list. For now, i will keep driving with Momentum HD because it is incredible and until i am 100% convinced it can be dethroned, then why sell it?



Anyhow, i have just ordered a Critical Mass Stand for the Mephisto. 3-4 weeks until i see it. 

speedbump6,

Certainly the high power of the Mephisto is not needed for a typical horn speaker, which only needs a few watts.  But a well designed amp has low distortion and the same tone quality at all power levels within its limits.  At high volumes, the sledgehammer effect might be delivered, but at low levels, you get detail/accuracy, etc. 

For that horn speaker playing modest volumes, the preamp might be set at 9:00, but for the Maggie, the preamp would be around 1:00 for the same volume.  Then you might say that the limiting factor would be the preamp which might have more distortion at 9:00 than 1:00.  In that case, the best option is to use a good passive preamp with no gain above unity, to yield the least intrusive electronics.