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
Everyone has their preferences WC and where all chasing that elusive SQ but even over a MacBook one can tell you have a world class system.

Im guessing Accuphase but at that price its the A75 & C3850, the A250 or even A200,s & C3850 would be a better comparison to your Gryphon.

Uh-oh, you are falling for preamps again after swearing off them last night.  OK, listen to the above, and then put the final nail on the preamp coffin as you show that all preamps cloud the details you like.  The contenders for best overall sound will be DCS straight into the Lux M900u, or DCS into the mystery power amp.  If you can ditch the Cardas speaker cable that was incompatible with the Gryphon Coliseum, use the Wireworld speaker cable, and now you have a 3rd contender--DCS into Gryphon.  Use the Odin XLR to maintain the highest purity.  Pure and simple, lol.
WC , my iPad doesn’t permit me to ear the differences in the preamp shootout.

I will trust and be waiting for your comments on that matter to enlighten me and us all. After all, you are still the better placed person to review these  in you treated room.  Can’t wait for your comments.
Such slight differences we would need 4-5 different songs with different types of music 🎶 if we had a chance to discern any differences.
This is one of the closest comparisons you've posted.  I *think* the Luxman is very slightly more rounded, and the Ayre is very slightly more distinct, but I would never be able to tell them apart.
I guess you have to be in the room to discern the differences. Even most if the differences are very small. Maybe we have a case of  « nuances in flavor » here.

My guess is the Ayre should be a little bit more fast and punchy, attributed to the complete zero feedback  design they use.
I agree with all comments regarding the very closeness as can be perceived not being right therein yhe room.
However, the Luxman at ½ that 30k cost of the Ayer... 😉... my pick for sure. 
All that said, the music sounding absolutely fantastic, detailed, spacious, airy, ever so right, this for both units. 
Michélle 🇿🇦
Hello all I started reading this thread two weeks ago and I’m not as far as I’d like to be. I’m on thread 75. Anyway, I have a choice between the McIntosh C2700 preamp or the anthem STR preamp with the STR amp. Can I get a decision on either of these two and nothing else. My system is Focal Kanta number three fronts, center and surround. 2 Jl audio e112. Carver m-1 ot amp.  Also 2 record players hooked up to a musical surroundings phonomena phono stage going to my old emotive audio prima tube preamp (that I want to swap out). Receiver is Onkyo TXRZ 1100. Whitecamaross, I appreciate your input. By the way I’m hooked on your thread still trying to read all of it.
WC -
You said you'd address my questions in your video, but you haven't yet.  I was asking about how the Ref6 (and SE) mate with the Luxman M-900u, and how you like the Luxman M-900u over the GS150 (and other ARC tube amps I suppose).

I was shocked to hear you say in one of your videos that you considered the Ref160M to be a "bad amplifier" because to my ears, it's one of the best I've heard, it's very good with Wilson in particular.  Heard it on the DAW many times.  

But anyway, my main concern is the Ref6 with the Luxman power amp, since I just purchased the Luxman and don't yet have it.  If you can give your thoughts here or on an upcoming video, I'd appreciate it.  I haven't heard you really talk about the Ref6SE much...You did one shootout that included it, but I didn't hear your thoughts afterwards.
WC - I found this from you, which gives me some hope!  So it can't be that bad lol.

"Luxman 900u amp/ arc ref 6 combo: the best midrange i have EVER HEARD IN MY LIFE has been presented by these 2 components regardless of any amp i have ever owned before. The luxman 900u with its spectacular midrange and the tubes from the preamp present a midrange that sounds better than if you heard a person speak in front of you. It almost feel like you can hear the saliva in the mouth of the performer. The highs are world class by all accounts and lack absolutely NOTHING. If you are a person who enjoys music purity, finesse, detail, high resolution and the last ounce of silkiness without any fatigue, this combo will make your jaw drop to the ground. This IS YOUR TICKET. "

https://forum.audiogon.com/discussions/my-long-list-of-amplifiers-and-my-personal-review-of-each?page=14
This still holds true about the ref6 and luxman.

Well, my 2 new components have arrived. My ayre will probably pack its bags to go to a new home after I put it through its last shootout next week.
Tonight I will make a short video about my latest additions... stay tuned...
One last thing, the preamp I will introduce tonight is the last preamp i will buy. If i still end up preferring the dac direct into the amps, then I’m done with preamps. They will become a "nice to have" and not a "must have " for me..
wait, you’ve had the Ayre in your system for less than one week, wrote that it’s the best preamp at revealing differences among formats, and are ready to part with it next week? Okay! I hope it was used cuz otherwise there’s no way it’s even broken in yet. Fascinating!
I just purchased the ayre kxr 20 today myself. Without reading through hundreds of pages, what’s your YouTube so I can watch
@WC is you want try the best DAC chip with great preamp section check latest Gustard A18. AKM4499 lasted dac with very power high current pramp section. And check SMSL m400.
New video getting uploaded with my thoughts on AYRE, Preamps and the new Components are revealed !
Just watched.  Should be a few great shootouts coming up!

Since I have the m-900u coming, I'm going to be very interested in how it stands up to this new world class addition to your stable. 
Man...I don't want to spoil anything but I suspect I'm going to bed at 5am today..
I agree with you that for purity and getting closer to all aspects of the music, there is likely no preamp that equals bypassing the preamp.  Like others, I heard almost no difference between the Ayre and Lux preamps on the Lux amp.  But going back to your video of 4/21 comparing the ARC Ref 6SE and Lux preamps on the Lux amp, I heard the ARC as being significantly more transparent than the C900u.  My best analogy is a blanket covering your speakers.  The blanket causes veiling.  The Lux C900u is like a 10 mm thick blanket, the Ayre preamp is a 9 mm blanket, the ARC is a 5 mm blanket.  But eliminating any preamp is no blanket at all.  Let's see how the D'ag preamp does.  

But before you give up on preamps, try the Benchmark LA4 preamp for only $3K retail.  The Benchmark AHB2 amp has close to the most purity of any amp I have heard, so I suspect that the LA4 preamp is the same.  Kal Rubinson of Stereophile found the LA4 to be that, and a thread poster (forgot his name) was going to try the LA4/AHB2 combo against his Lux combo.  If the LA4 is only a 1-2 mm blanket, it is worth considering for when you want loud SPL's with very good purity.

I don't think "synergy" of the same brand of preamp/amp is all that important.  The ARC ref 6SE still beats the Lux C900u into the Lux M900U for purity and transparency.  The C900u merely increases the blanket over the M900U.

Dag has warm, character in the manner of Lux, Rowland, Pass, compared to the purity of the Benchmark AHB2 or my Mytek Brooklyn amp.  No, I haven't heard the Lux M900U or any Dag, Rowland or Pass amp, but I say this from you past evaluation of those amps.  I did hear the Lux 600A class A amp and found it reasonably transparent, but still warm compared to Benchmark and Mytek.  The Merrill Element 114 I found to be warmer than the Mytek.  

If you find that the Benchmark LA4 is the most transparent preamp that you would find worthwhile for loud SPL's, then try the Benchmark AHB2 if you still believe in brand preamp/amp synergy.  If a single AHB2 doesn't have enough power, you can get 2 and use as monos for only $6K retail.  Deal with either Music Direct or Benchmark directly for their return guarantees so you don't lose money.
Curious how people are watching/listening to these youtube videos. How confident are you that you’re hearing what @whitecamaross is hearing in his room? I’m just using my iPad, so I’m listening to the commentary and not the SQ at all. I could send the audio to my rig but that would merely be youtube quality (mp3 quality, right?) and further relies on the mic quality, recording, and setup in his room. And even if that chain were optimized I would still be listening through my gear, not his.

IOW, I don’t see how anyone can credibly assess SQ from a youtube video. I mean, it’s cool that @whitecamaross is sharing his impressions and has such a wide breadth of experience but are you really confident that you are sharing the experience from the videos? 
Right everybody realizes that, but with the tech available it is what it is, and is appreciated by his viewers.

It’s like if I’m travelling for work and my wife Facetimes me so I can see my kid at bat in his little league game. Of course I realize that I am not actually at the game, sitting in the stands, and of course I realize that there are other things going on in the game that I cannot see through the Facetime feed that I would be able to see if I were there (e.g., how is the right fielder playing him to hit?), but dammit if having that Facebook feed of seeing him hit isn't a hell of a lot better than having my wife merely attempt to describe it to me afterwards.
WC - All that being said, I personally value your comments and opinions over the SQ comparisons.  You are the one who is actually there. 
Amen 2fastdriving :-)
I've said this before. The real value is getting whitecamaross's feedback. There's way too many variables involved for us to make a sound quality determination over you tube.
@kren0006 I agree with your post but that has nothing to do with my opinion that SQ comparisons from a youtube video are not credible. Other than people who have actually heard these components,  @whitecamaross opinion is the only one worth reading. YMMV
Sure, fair point. I have also been a big advocate of having WC state his conclusions and not having others try to color WC’s statements based on their subjective views not having heard the components.


Not many try to do that and if they do most everyone now just ignores them.


Most of us who post our impressions of what we hear in the vids just do it for sake of conversation and don’t try to sway others or take the comparisons as gospel. At least that’s my impression, ymmv 
Good points above and I appreciate you all wanting to read my thoughts.
That said, I went to bed at 3am listening to this Momentum gear and have to do more listening over the next few days. I love what I do and it’s great to have followers that also enjoy my journey.
I also want to THANK YOU ALL because I think
the thread has turned around ALOT and there is much less bickering and arguing other than just disagreements which is fine.

Quick question, does the shoot out of the gryphon coliseum with ayre preamp and luxman c900u interest anyone?
Does it interest anyone?
Are you serious?
Seems like I have to explain something to you whitecamaross:
EVERYONE is interested in EVERYTHING you have to say!
We all enjoy your comparisons, so if this is something you were going to do for your own experience - by all means, please share :-)
My pleasure on the Facetime Little League analogy, WC.  I'm hoping you'll answer the two integrated amp questions I messaged you about.  I'll keep your responses confidential if it's not something you'd state publicly, just lmk.  Thanks!
WC - I'm also interested in anything you want to share. Not many of us have the ability to make all of these pairings and formulate conclusions.

I will say that you should look into getting your own blog site and creating reviews.  That would be much easier to catalog and digest all that you've discovered.  Currently, it requires reading through hundreds of pages of forum posts to gather your information and try to piece it together.   


Jay, you are ripping through all these changes very quickly. Not sure how as it dosnt seem like it’s products you can just pick up at the local audio store from off their shelf. I would imagine even the manufacturers have a backlog of products. However you’re doing it, keep it up. I do agree that you need to hear a big difference to make it worthwhile. When I read reviews online, it almost seems as if every positive review is leaps and bounds above, meaning amp, preamp, speaker, dac, transport, power cables, interconnects, speaker cables, power conditioner, etc etc. with all these huge improvements, it sure seems like better than perfection should have been achievable by now, lol. In reality I believe it’s more like very minor differences, and then only in certain areas, each piece has its strengths and weaknesses. The goal is putting together pieces that give the best compliment. Even then I find I enjoy many different sounds, so my perfection cannot be defined as x. 
Makes sense and thank you for thoughts. Right now, I CAN NOT justify buying ANY OTHER preamplification if the goal is to mate it with the 900u amp. To me, it's a WASTE of money and time and the improvement isn't really significant or any at all in some cases. Spending 20k on a preamp to only improve 5% from the 900u preamp is not smart at all. 
As far as the momentum stuff, it is BY FAR THE BEST LOOKING equipment I've ever owned. When it comes to sound, you'll need to stay tuned to find out my impressions. Is the momentum S250 the star of the combo or is it the HD momentum preamp ? I don't know ... I haven't separated them yet but I have heard them here last night and I'll make a video later on.

Up next, Gryphon Colosseum wakes up from the dead and joins forces with the C900u and Ayre KXR TWENTY preamp. Is this where the 900u preamp begins to lose ? Or will it still hang with the $30k Ayre KXR TWENTY preamp ? Stay tuned...
Nah. I have seen it in black and it doesn't quite do it for me. Silver looks more bling.
The silver is beautiful, and who cares what it sounds like. It’s a work of art if it dosnt work out for the system. I’ve been buying mine used to find “ bargains” got the Ayre for 16k vs regular. I saw a Soulution Audio amp ( reg 55k) for 17k just now. Things that make you go hmmm... never thought I’d spend that much on an entire system at one time, much less think of those prices as bargains
My guess is the Gryphon is the best amp you have for the purity and clarity that you now value.  As long as you don't use the Cardas speaker cable which has the least clarity and causes hum anyway.  You will probably come to the same conclusion that any preamp is a step backwards, with either Lux or Gryphon amps.  So yes, I look forward to your shootout among preamps with the Gryphon.  Then with the most transparent preamp, do the final shootout between DCS+preamp+Gryphon (or even Dag amp) and DCS+Gryphon (or Dag amp).

I like silver for everything.  Does anyone want black coins for money in their pocket?  LOL.
I will give my impressions of the Dag Progression stereo amp and matching Progression preamp VS the momentum s250 and HD preamp. 
Hi WC - I’ve followed your journey with great interest for the past couple of years and have vicariously enjoyed the ride! Like many, I’ve done my version of said ride albeit at a bit lower level. I don’t know if it has been previously suggested or discussed but I greatly encourage you to hear the Vivaldi Clock in your system, if you haven’t already. I had my Vivaldi One for a few weeks and loved it but my dealer (that would be audio dealer!) gave me a great price on a Vivaldi Clock he had taken in trade. It is easily one of the best moves I’ve made in my quest for “better sound.” It brought more of everything that drew me to the Vivaldi One, i.e., tonal richness, detail, holographic soundstage. I could go on and I will, just a little! If I were to quantify it, I’d say it added another 25% in sonic value to my system and once heard there was no way it was leaving! If you have heard it and didn’t find it captivating, let me say in the words of Emily Litella, “never mind!” Be well!
i am currently contemplating a clock, but more and more amps and preamps keep arriving.... 

Dag Progression Stereo Amp and Progression Preamp 
VS
Dag Momentum S250 and Momentum HD Preamp

My thoughts to come soon. 

@WC In keeping with your audio itch that perhaps the preamp may be standing in the way of a more fulfilling music experience of your great gear, I suggest that you might find passive preamps another ”road not taken”. And here I suggest you look into and even audition the extraordinary Townsend Audio Allegri + and now, recently, the more useful Allegri Reference which allows remote passive .5db volume control.


I understand the benefits of a passive unit using autoformers, such as the Townsend, but to my ears, I prefer my Luminous Audio unit. I find autoformers " soften " the leading edge of the musicianship, and I want to say, this is my personal take, and preference, between the 2 designs...to each his / her own..... ymmv...My favorite tube amps, are OTL, such as Atma-Sphere, and why I am not a fan of many Mcintosh power amps, those using autoformers. We all like, what we like.
So have you all ever wondered how much different are the Dan D Progression Stere & Preamp combo in comparison to the Momentum S250 & Momentum HD Preamp? Don't guess anymore. Here are my thoughts:

1. Progression is smooth, controlled and musical
2. Momentum is clearer, purer, more detailed, livelier, BIGGER BOLDER BOTTOM END, bigger soundstage, prettier. FAR FAR SUPERIOR to the Progression stereo/preamp combo in every regard.


THE END
I don't have a favorite...I've neither heard the Walker Axiom nor the new Allegri. I do have the Allegri + which is to me a wonderful unit and a welcome difference from my preamps. And now that the output from DACs and streamers is more than enough to drive quality amps WC has, I thought he too might enjoy the comparison. When I've heard it, I liked and enjoyed the Axiom too. Next time, I hope I'll remember to listen, as you do, for those leading edges...thanks.
Tonight's final shootout for the luxman separates. This will be the final video for luxman on my channel for the time being. As promised:

Gryphon Colosseum with Ayre KXR TWENTY and with Luxman C900u. 
Vídeo to come tonight
wym2, meant no harm in what I said....it is all good....Tim Stinson, is " the man ", behind Luminous........