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
I'd love to have THAT Gryphon air filter' looks incredible and Im sure sounds alot better than any air filter.

Seriously techno dude if you cant say anything nice anymore' then shut the **** up.
Ok then , a very nice air filter that is very liquid sounding. Like on another level of liquid sounding.
Personally I love the refined industrial look of Gryphon. The Antilleon, Diablo, Mephisto are  all very cool looking IMO.

I'm very happy with my BAT VK_6200, but if I ever decide to upgrade to a dedicated 2 channel amp, I would definitely consider Gryphon. Both in looks and performance they are SOTA or very near SOTA at their price points.
.....I have heard a few Gryphon products, and was always impressed by a " detailed purity, smoothness and control ", to the reproduction ( and, never through horns ). As an FYI, Flemming Rasmussen, the Founder and now ex CEO of Gryphon (although still involved with the company ), has been responsible for the visual and aesthetic designs of the products, and of course, uses his ears as to the final product introduction. The electrical circuits and designs, have been by some unnamed world class designers. I always found this weird, but it has worked for the Danish company. The Colosseum design, reminds me of some Halcro amplifiers, being tower designs, but taken to another level. Beautiful. I would love to own a pair of D'Agostino Relentless Monos. Wondering how they would do, driving my Lascala's, lol. I am typing this during the commercials of the Daytona 500, and am finding it fascinating, the information and the camera work, being displayed and provided, as we, the home audience, can get a greater understanding of it all. I hope there are no mishaps, and all of the drivers come out of it safely. I would imagine, you, WC, have a great understanding of the race, specifically the vehicles. Enjoy !
Mr D
That was last years Daytona 500
The race is delayed (Rain )  until 4:30 PM Monday Feb 17th
Greyhound, Yes it was, as I realized it a short time later. Watching it now. Thanks
No review yet of the Gryphon Colosseum ? It’s a pity the Dag and Pass are gone. The shootout will only be between the bright sounding Constellation monos which I really do not find appealing with their messed up inside quality build. 
Cable shootout of Odin vs audiomica laboratories consequence!
It’s 1230am  and I have to up at 5am! The things I do for those of you who appreciate it !
Enjoy !

https://youtu.be/9ZafhqRyVs0
How can you evaluate your system and especially cables without cable lifters?  Do you want much better sound in 10 minutes?  You MUST try these cheap things....you can make them out of cardboard for NADA.  What are you waiting for?  All your cables should be off the floor for best sound.
Thanks WC for the video. I went back and forth 6 times and even though I did hear differences it was the Audiomica that was fuller but more important it came across as musical. The Odin seemed brighter with more top end but lacked a rythm to the sound. Just my opinion. 
Whoaaa... The comments are really all over the place. Some are saying the Odin is too bright and others are saying it is smeared..then I am also hearing from others that the audiomica is fuller but not as clear as the Odin, etc etc. I guess this is really about:
What are you using to listen ? Phone ? iPad? Computer ? Audiophile headphones ?
I suggest that you all at least TRY to listen using different devices BEFORE you come to a conclusion. It is very important that you all do this first. 
The audio quality was so poor that I stopped a few seconds into the recording. Have used this playback format for many other high end comparisons with no issues differentiating the content.  

I had no problem discriminating between the two recordings played back on the single speaker of my old/trusty iPhone 6S. Tentatively, I heard more "air" and low level information from the AudioMica...


Having said the above, this afternoon I will play back the clip on my system.... Will post my updated impressions in the evening.


G.

 



Thanks Guido. This is WHY I suggested that everyone should try to use several devices before they come to a conclusion. 
Evaluating 30k $ of power cables with a cellular phone. This is not serious. Even social youtubers use them, and they are mostly students...

Get a quality microphone. 

On my Mac laptop both cables sounded good although I was not familiar with the music. To me the Odin1 sounded more spacious, detailed and the reverberation time and decay seemed to go on forever (which I believe was the recording engineers intent). The Audiomica cables did sound fuller but less detailed and spacious....Listening to these cables back to back sounded like the Nordost Val2 vs Odin1 in my system. The Val2 sounded fuller (in the upper bass and lower midrange) than the Odin1. The O1 was more neutral with more weight (deeper bass), more spacious, detailed and much better holographic soundstage.

I think a more 'straight up' recording without all of the added reverb and artificial effects would be a better piece of music to compare these cables. Vocals, Bass, guitar or piano and drums without added effects....or a small live acoustic jazz trio. To be able to hear how quick a stand-up bass or kick drum decays is important to me...less smearing, clear details etc...

Hearing the presentation at your house might yield different results. That's the best I could do through a laptop. Thank you for sharing with us.
Ok guys ,
I've decided to do a part 2 of this video where I will be playing a song that is very familiar to us:
Hotel California by The Eagles. I hope this will allow you to hear things better since it should be a recording we all know very well. 
Video to come shortly. 
Oh well guys , the video got blocked by YouTube.. this song has copyrights.. I tried ! 
Have not watched the cable shootout video, as I am not interested. I am posting here, because something very interesting just happened. I received a PM, through A'gon, from Mr. Flemming Rasmussen, asking me to make a correction in my above post, as it went like this. " Just to let you know, that ALL Gryphon electronics the last 25 years are done in-house by Gryphons own R/D department and headed with the same head engineer for 20 years, Mr. Tom Mueller-Only exception has been of the passive speakers ". So, I was vague about these facts. I apologize to Mr, Rasmussen, as I was unaware of these facts. What is more amazing. Look at the people who are reading these threads here. Saying things bad about a product, or in my case, vague, can easily get back to a manufacturer, importer, or others. This is why, imo, I do not see bad reviews, anywhere.......Enjoy ! MrD.
Whoa. I’m actually quite impressed that he has taken the time to read my thoughts on everything I've reviewed. Very honored to know they follow this thread !
Stay tuned GRYPHON AUDIO. Your turn is coming to jump in the spotlight and see how you do versus an American brand (constellation audio ) 
Cheers !

ron17
251 posts02-21-2020 9:10amOn my Mac laptop both cables sounded good although I was not familiar with the music. To me the Odin1 sounded more spacious, detailed and the reverberation time and decay seemed to go on forever (which I believe was the recording engineers intent). The Audiomica cables did sound fuller but less detailed and spacious....Listening to these cables back to back sounded like the Nordost Val2 vs Odin1 in my system. The Val2 sounded fuller (in the upper bass and lower midrange) than the Odin1. The O1 was more neutral with more weight (deeper bass), more spacious, detailed and much better holographic soundstage.

I think a more ’straight up’ recording without all of the added reverb and artificial effects would be a better piece of music to compare these cables. Vocals, Bass, guitar or piano and drums without added effects....or a small live acoustic jazz trio. To be able to hear how quick a stand-up bass or kick drum decays is important to me...less smearing, clear details etc...

Hearing the presentation at your house might yield different results. That’s the best I could do through a laptop. Thank you for sharing with us.
After listening to the initial video several times, I am hearing much the same as Ron here. Especially focusing on the drums, they are more distant with less detail on Audiomica. The Nordost places just as much emphasis on the vocals without lessening the impact and details of the drum kit. Overall with Nordost there is more air between instruments and a more spacious and deeper sound-stage. The sound is more detailed with Nordost without loss of musicality.
@whitecamaross 

Try uploading Hotel California again and instead make the video private and only watchable with the link.
My first notes here were based on listening using my Lyngdorf with room perfect as a pre-amp. I'll compare again listening direct through my Class A Tube setup which is a pretty big step up from the Lyngdorf in air, bass control and reproduction as well as sound-stage depth and detail retrieval. 
First, respect the law. Copyrights exists for a reason.

Second, you really have to be a biased fanboy to believe you can honestly judge the differences between 30k$ of powercords recording with a cellular phone...

Third, you know you’re not going anywhere doing the wrong things on youtube specially when some audiogoners have friends working there...

Chazzy,
Try to listen to the last video I uploaded. It's part 2 of the cable comparison. 
Video unavailable
This video contains content from UMPG Publishing and WMG, one or more of whom have blocked it on copyright grounds.

:(
Post removed 
@chazzzy007
You’re supposed to ignore my posts, don’t you remember.

WC, maybe you could try to put a 5th video on yt...
@whitecamaross 

For her and her family's sake I hope she gets better and recovers. :)
WC, I think this gentleman does a very good job with his review videos. 
In the linked video below, he is comparing the sound of different tubes in a preamp. IMHO, the differences are easily discernible. 
He also discusses how he sets up his gear for the comparisons.  He also does a short take of the song before switching the gear. I think this improves the pace of the review. This may be of help as you get more into the video reviews. 
https://youtu.be/RltJw004j3c
@chazzzy007 

For what it is worth, I just listened to BOTH videos. I clicked on chazzzy's link to video 2, watched the video and when the video ended it started the much longer first video.

My findings using a laptop speaker:

Audiomica = Thicker with maybe a little more meat on the bones. 

Odin 1 = very nuanced. All frequencies seem well balanced, in other words no highlighted frequencies. Holographic. Audience sounds very real. Overall realistic feel.

For me, with emphasis on the fact I'm using a laptop speaker, I like the Odin 1 much better. It brings all the little details that the Audiomica seems to gloss over or leave out like air, ambience, high-level details that are included in the ambiance, a better sense of realness. You just get more with Odin 1. I'm not sure that is for everyone, but it is for me. This is what really makes listening fun for me.

Addressing the laptop speaker variable. If you can hear differences between the two cables on a cheap laptop speaker, imagine how much more so when in person. If you can hear a difference (fairly easy for me to hear), then you can to some point extrapolate the difference for yourself. And I'd imagine that with my conservative assessment, I might be under playing the difference between the two brands.

@whitecamaross 

Thanks for taking the time to do this for us. I think it is a learning experience for us all.
Again, make some cable risers out of cardboard....will probably blow your mind.....so much faster and more open the sound will be....especially for the round cable that is sitting right on the rug.  The Odin is sitting on its edge so most of the cable is away from the rug.  Just try it....takes 10 minutes.  All cables need to be off the floor....whether its rugs or wood or whatever.  Serious improvement for practically nothing.  I will not mention this again.  You can lead a horse to water......well, you know the rest.
ewert

Very nice example. The guy uses a pair of microphones, and each one is aimed at a single speaker. It’s a pity WC don’t take the time and ressources to do this the right way.

Odin 1 pc is first generation Nordost, it will always sound leaner compared to others in it’s class...like Shunyata or Cardas, etc. You have to step up to the second gen. Odin 2 or Valhalla 2 to get the new fuller Nordost sound. We don’t need copyright blocked youtube videos to know this. We already said so a couple weeks ago.
Post removed 
As there seems to be confusion/ misinformation about ‘series 1’ vs ‘series 2’ Nordost, I thought I’d share my exchange with Nordost when I was deciding between V2 and O1. As you will see, Nordost does not consider Odin 1 as part of ‘series 1’ as it is being referred to above.

Me: Which would you recommend and is there anything the V2 interconnect is better at than the O1?

Nordost: No, O1 is better in all areas and should be. It’s Supreme Reference compared to Reference.

Me: I am leaning toward to the O1 but am a bit concerned I may lose the warmth and richness of the 2 series.

Nordost: Not in the least, O1 is still the best cable we produce outside of O2. O1 will outperform V2 in each category but still maintains the same characteristics or sonic signature.

Me: Got it. In part I ask as series 1 has been described as 'lean' and Odin 1 has been around since 2007 and is part of series 1...   So I did not know if that 'lean' sonic signature would be part of the Odin 1 as well versus the series 2. Does that make sense? It sounds like this is not the case...

Nordost: You are correct, when we talk about series 1 we are referring back to Norse series 1 and Valhalla series 1. Odin has never a series 1 in the same context due to individual conductor gauge.




There ´s a reason why Nordost made the Odin 2 PC. Because that Odin 1 pc was getting it’s ... kicked by the competition in the midrange fullness area.

Whatsbestforum users corroborate this.
Goners here on this thread corroborate this.
WC latest video corroborate this. Ask him, here, we trust what we ear and experience...not what is written by the brands.
So zprr, you only have what Nordost says.... And it’s pretty amusing...the Odin 1 is not a 1 , but there ´s a Odin 2 ... so if there ´s a 2 that means there ´s a 1 ...

and it’s flawed.
Odin 1 is still leaner than Odin 2. If it’s leaner, than it’s a must be a bit lean don’t you think ? Why make a fuller Odin 2 , if Odin 1 is not lean...
Odin 1 seems a little clearer and to my liking, Audiomica is fuller but not as clear to me on the video of course I would have to be there to make a final decision.

Has mentioned by me a few pages back and now by a couple others "get those cables off the carpet and get at least a block of marble, granite or block of wood to put the Gryphon on with the new spikes.

Between the cable lifters and a base under the Gryphon w spike your system will sound noticeably better.

Still sounds great but’
I've been re-listening to the video and I can hear what others are saying BUT it is my opinion that the Odin cabled are not a universal cable especially since WC changes so many pieces whether it's amps, speakers or some new digital piece. WC you need to have a variety of cables for evaluation with other gear. Just keeping the Odin's or just Audiomica is not the way to go but hey it's your journey but more important it's your $$$.
Keep the journey going!