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
Not assuming anything.... I have no idea what speakers you might have installed.... I purely report what I heard through my USB Plantronic headsets connected to HP Spectre.

I can only hope that things will eventually improve.

G.




Understood but unless you have heard and are familiar with the song, you, me and anyone else would be assuming.
How many classic rock songs have you heard that don’t have hard transients.... Again, it’s crucial to be familiar with the genre of music. You can’t make Ozzy Osbourne sound like Diana Krall no matter what system you use.
It's rock.. if a system sounds smooth playing rock then you got yourself a big problem. 
I hear what Guido hears. Sounds the opposite of the M6's. Sounds thin and forward like a speaker that needs to be broken in. Maybe a familiar recording would help. No way it's Sonus Faber. SF has a laid back warmer sound.
Visiting this thread during 2020 due to having time on ones hands and having been exposed to limited interaction outside of the home has been a good time spent, it certainly served a purpose to see and hear a few off the beated track equipmment choices.
During the 2020 December Holidays and since, the time taken to drop in to watch a Video presentation has been another good time spent.

Making assessments of audible qualities of a device through a Laptop has been a stumbling block, but the method has been great for seeing the equipment, picking up on songs worth pursuing and listening to discussions and presentations from guests.

I have again, as a result of COVID restrictions being eased, began to visit the homes of others and share in HiFi related social gatherings where a HiFi System is at the centre of the meeting.

At one arranged visit just recently attended,  I was preparing the music to be brought to the meeting by listening to CD's played in the Car on my daily journies.
Out of Four CD's selected,  two were new to my collection with tracks not too familiar to myself.
When these tracks were played on the HiFi system during the visit,            I did not recognise the Tracks and thought the choices were incorrect,  not that that mattered too much.

What really struck home is what a person can forget.
I like the car audio system, it is great for catching up on owned music,
I also enjoy Alexa, so much selection on a voice command.
None of these are a Dedicated HiFi System as I know it.

A HiFi system listened to in the dedicated environment, will produce a presentation that can not be replicated through other types of listening,
and definitely not through a recording using a standard type microphone.
Any methods used will be way off, unless it is a professional sound recording, with certain file type is produced to be replayed. 
To try and Mimic the presentation of the system without such support,
will be quite deficient in delivering the fullness of the HiFi Systems capabilities.

There is very expensive equipment on these video demonstrations, to assess it for its audible qualities without the correct recording information being made available to be assessed,  can prove to be damaging to the equipmemts reputation, when the commentry is non complimentary.

There are a lot of observers looking in on the content of the videos.
Because of this popularity the commentary that follows goes far afield. 
 
To be very fair to the equipment producers, the follow up discussions should be clearly defined that all commentry are limited to the perceptions about the audio quality having been replayed through a Laptop, where the sound content of the video has not been produced professionally.

I don't see how any commentary can be taken too seriously about the audio quality of the equipment, and any commentary that discredits a piece of equipment, as a result of the video being the evidence to justify the discredit, is very quite unfair to the producer.
Any subjective commentary on the Aesthetics or Guests Discussions will have more substantiation as the videos demonstrate the appearance of items and the narration quite sufficiently.
  
    
going to take a long shot- Goebel. distributor is in Miami, they weigh an absolute ton, and are somewhat efficient. VSA might be another good guess. 

doesn't sound like Kharma, Rockport, or SF to me. 

@jays regarding these yet to be revealed speakers how many times have you sat down and listened to them? At a dealer or maybe Axpona? With what amps? 
My guess is one of the Gryphon loudspeakers, as they are ideally matched for the Gryphon amplifiers — probably the Trident MkII because any larger sized one would overpower Jay’s room.
Well I compared the song Liberty of this teaser vs the Mágico Liberty and I must say that I prefer the teaser by far. The Mágico clip was the one with the Essence monos and the teaser was with the stereo one I believe. I was very happy with the M6 before but now I feel like the reference standard just went up. Unrestrained dynamics make me think “horn”. It certainly seems more efficient. Also is it possible there’s more detail here as well. Mágico has always been the king in this area. This new speaker seems to better portray the weight of the sax as well. What ever this one is it up there $$$ IMHO. I listen to the #2 teaser 3 time and going back for a fourth in a minute. Jay Just about the time I think you can’t go any higher up you always surprise me. Anyway this is my first impression. Going back now to see if I can find any clues to what this is. This one is very interesting.
carrie1110 +1May need to compare more. I may be in especially receptive today. Background instruments sounds clearer and more apparent but nuanced I don't recall them that clear before. Sorta like that improvement where you got to relisten to all your records. Maybe jumping the gun. It may be just for this recording or just me at the moment. This one interests me.
Here's the new speaker with a baby essence stereo amp
https://youtu.be/Zkbtx3E_B5s


Here's the Magico M6 with essence Monoblocks:

https://youtu.be/u0KukMhvCkc?t=462
You all can easily click on both and listen. I certainly hope you all are using headphones at the very least...

IMO whatever the new speaker is blows away the M6.  I use the song Liberty whenever I go to listen to other speakers.  Great sax

Are you guys seriously making sound comparisons from a video of speakers on a cheap phone or computer or a recording period on any kind of speakers or headphones? Thats absolutely asinine and ridiculous!
Mofojo- Sure I can make comparisons of two different videos. Now that doesn’t mean I can hear what the speaker sounds like in person but yes I can certainly tell the difference between two videos listening to a good set of headphones. Sometimes I also send the video signal through my DAC then out through my system. Sorry you can’t hear a difference but I sure can. Did you listen to the two videos or are you just assuming you can’t tell the difference. Jays videos are pretty good quality  You may be surprised what you can hear.  I was skeptical too at first. 
Whatever the new speaker is, I prefer it to the M6.  On the M6, the opening voice is dark, muddy and veiled compared to the new speaker.  No, the new speaker is what it is, even before break in.  I always thought the M6 was dark and veiled, even compared to the Alexx which had more pizzazz on upper midrange, HF percussion and such.  The M6 was improved with more transparent electronics such as Gryphon Essence, but this new speaker on even a euphonic tube amp would kill the M6 for lifelike clarity on the fastest SS amp.  I look forward to hearing more music on this new baby.

Mofojo, I am presently using a computer with rolled off HF compared to my usual computer.  I still hear the obvious differences.  Great show and choice, Jay!!
Thank you.
This exercise is done with a speaker that also retails for 6 figures just like the M6. It is heavier and larger than M6. I want you all to click the links above and listen and then post your thoughts here. This is about preferences, YOUR PREFERENCE... NOBODY is wrong or right.
Let me hear your thoughts here on this thread. More videos coming over the next few days that will make it easy for you to compare. Once i have had enough teasers, I’ll be front and center unveiling the beast...but i need to get your feedback first without you knowing what speaker it is in order to avoid the typical bias that exists when we know what brand it is. Just listen to the videos and post your thoughts. Deal ?
And I think I prefer the M6. But the amps are different and I hate this song so much, it is also poorly recorded, that it doesn't make any difference for me.
Is this kindergarten? Teasers?.....Demanding so many subscribers before A/Bing certain gear?  Constantly justifying why you do what you do?  Who, is all this serving?  Hardly any audiophiles can even afford this gear.  I guess you think you are in some kind of entertainment industry?

You want to entertain and get more subscribers?  Here is a way.  Keep one serious reference system.....do not sell it.  Then, bring in affordable cutting edge products and A/B with your reference......and also tweak the affordable gear to make them even better.  You would have 100K subscribers in a minute, if you did that.  How about the Spatial X3 speakers.....and you could tweak them for better sound.  They are only $8500.....built in 15 inch powered woofer.  High efficiency mids and tweet using big AMT in waveguide.....all open baffle.....simply incredibly for the money.....what if this speaker was as good as your Magico or whatever......wouldn't you want everyone in the world to know....so they don't need to spend so much money?  Now this.....would serve people.   I would be here everyday lending a hand.   A tweaked out Cube open baffle speaker would be mind blowing, as well.  How about the new AGT amps....only $7500 the pair.  How about lots of things besides ultra conservative expensive gear.  There are some wild inexpensive things out there, that will make your hairs raise up and blow your mind.  Or, you can just stick to expensive large box speakers that double as workout machines.

Yes, I still love you....each and every one.  But, as someone who likes to point the way to the possibilities of happiness......I like to hold up a mirror and state what can be done.....the more people served....the more we are all happy.  How can you serve more people?
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I removed my response to you in order to avoid friction or any bickering. I appreciate your feedback above but to be honest i am simply not taking my channel in that direction. Nothing personal. Don't take it the wrong way. 
Jay,
I like your patient Socratic method.  That is, eliminate bias by withholding the name of the new speaker until more listening is done with open minds and ears.  This could be your best speaker yet by far.  If so, then I agree with ricevs on this one point--keep it as a long term reference, which will best reveal all the ancillary components you want to evaluate at different price levels.  This speaker will sound fabulous on a few cheap amps I know and have mentioned.
Time will tell if this speaker will stay. Im unfortunately cruising at 25,000 ft in the air and there aren’t many more options here that don’t cost as much as a house.
I’m erasing the brand name until after we hear a few more songs allowing people to have an open mind. I will keep using the baby essence for this exercise which is doing a great job. Then once i unveil it, we will begin to move up to beefier amps like the Antileon Evo that sits here on the sidelines
New speaker better than M6. More palpable horn sounds (baritone sax I think)

yes I know a sax is not a horn (sat the row behind the bari sax for many years) but it was quick to type
Yeah, agree that the VS Ultra 9 or at least the VR55 should be on your radar. Both have back of speaker adjustments that allow you to adjust the speaker to your  room at the location you choose. That coupled with great acoustics, prob a good choice for your room. I am looking at a few models in their lineup too so with you there.  
Depends on the house and its location.
ricevs was very rude unfair and plain wrong. Except for one thing, sort of. Audiophiles are very much kids in a kindergarten. 
I still think that analog source is in order, long overdue, in fact. Forgive me, but in many ways, that digital sound presented by $100k digital front end is ridiculous, very far from real. No speakers or amps can do anything about it.
New speaker with stereo Gryphon Essence amplifier:

https://youtu.be/7RyRq4KgfAY



Same song with Magico M6 and Gryphon Essence monoblocks:


https://youtu.be/MrxMD6v7asY?t=334

NOT ONE PERSON has guessed what speaker it could be. 😂
I’m loving this... When you all see the speaker, heads will roll on the floor...
I love doing this to you all because it negates the typical "bias" that exists when we know what it is. It is much better to do it this way. 

Why is that surprising to you?
There are thousands of speakers out there.
Why would you think someone could guess it?
You haven't even provided a multiple-choice list.

i already gave enough hints... over 92 db efficient, 6 digit msrp, heavier than m6..taller than m6.. 
You mean to tell me there are hundredths of speakers that fall within those parameters? really? ...
Jay,
How were you able to change your screen name and have this thread transferred to that new account? I've never seen that before.
I requested this from audiogon since i became a verified dealer in order to sell the components i cycle through. 
Well if we’re being honest your hints can be misleading too. Last time you told us you were spending way less (like 60% if I recall ) and then unveiled a speaker that cost 60% more than Alexx.

even if amps were cheaper there is no way system was 60% cheaper (since system included same dac, cable etc) so there’s that .....
Just read the hints i posted above... They are 100% accurate and there are no surprises either. 
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Yeah, M6/Essence monos sound better. More natural, deeper, less distortion. Closer to how it should be. Cost of this set-up sucks big time, the rest is fine.
Well I think the new speaker setup to me is much more engaging compared to the M6. I guess it depends on what part of the sound you are referring to when you say “more” natural. Dynamics?  I don’t thinks so. Clarity?  Not even close. Soundstage? Nah. Depth? Nope. To me the M6 sounds boring by comparison, but then dynamics and clarity are important to me. So to say natural,  to me I assume you mean more like the live event. In comparison the M6 seems reserved maybe even subdued a bit. However this is only when comparing these two videos. Time will tell, these are just first impressions for both all of us. Right now as good as the M6 is I prefer the new setup.
that is a funny comment. i have been looking at the youtube comments and it looks like many think it is a horn speaker. I guess the huge dynamics and impressive vocals are giving it away...
Ok.. another guess. Dynaudio Evidence Master? Midrange sounds familiar to Dynaudio.
Timbre is more life like, not what you mentioned. New speakers do appear to have higher resolution and slightly exaggerated dynamics. They somewhat spit the sound out at you. I cannot assess soundstage under these listening conditions . $10k bucks for them, fair price. $50k for Magico M6.
Well yes I can agree there are some things that the Mágico does very well. I can definitely appreciate it 100%.  No doubt this is a world class speaker and for many people what it does well is more important than what It  doesn’t do. This is the case with many speakers.  For me I like the new one better and for you,  you like the M6. Doesn’t mean one is BETTER it’s just means you prefer one over the other just as I do.  I like the M6 as well but new sound has my undivided attention. Maybe it’s just change IDK that’s why I said time will tell. 
The recordings sound different altogether, flat and bright, did you use the same microphone?