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

Showing 50 responses by henry201

@inna
No, you got it all wrong. You just can’t tell much with the Wilson’s, everything passes, mediocrely. They have half the resolution and are consistently ‘confused’. Not a good speaker for any critical listing, maybe for a fun party.

Way too bright, harsh, lack of midbass. Knopfler sounds like a little boy. They also sound like parts of them is out-of-phase, something is not correct.   
Where is the dynamic ?...

LOL,
I just looked at the soundwave of this song, it’s compressed as a tortilla. There is also nothing ’real’ in this recording, no acoustic anything, even his voice is processed to a T. Magico is a fine wagyu steak, not a burger king whopper, you will hear it like it is 😐


Jay, I read your reasoning. What you need to consider is that by mismatching products, you do disservice all of them. The XA may sound fantastic on an Avantgarde, but I doubt it will on any 4ohm ~90db loudspeaker. It’s not just cost, it’s spec. The X series will be a better match for the M6.
Not how I hear it. The Alexx has this added ‘echo’ around everything, the image is not well defined and somewhat smeared. The voice on the M6 is focus, and it is clearly in front of everything else, unlike the Alexx more homogeneous, diffuse presentation. The M6 sounds louder with more dynamic contrast, even though they are both playing at the same level.
All good here, no worries, this is fun.
Its not just the price, its the compatibility. There are cheaper amps then the XA60 that will match the M6 better.
@kren0006
I though that's what we are doing, nobody told me we have a budget 😁
@viber6
The GTA may be more clear sounding, but they lack dimensionality and heft. I would get tired listening to these.
XA60.8??
That’s a 60W amp, on a good day. Not worthy here.
You should give the M6 the power they deserve, its the most expensive speaker you had, yet you pair "cheaper" 2nd tier electronics on it 🙄
@faxer

Just to show you that I’m not full of crap
Not sure what you are full of, but you do seem to have some anger issues. Never heard your speakers, and now I am not sure I would want to (In case it escaped you, we are comparing YT clips here). Chill out, this is not a good look 🙄
@kren0006
That makes 3 favoring Wilson over Magico.

If you only counting the Wilson votes (and from the same people) 🤣

@Techno
Now you are being rude and delusional. Do you always refer to yourself as ’"majoritary"?
Watch out, so the whopper’s ketchup does not mess up the vinyl seats.

A port is basically a bass EQ. Can be fun on some cuts, but typically a major annoyance. It has other flaws, like messing up the time domain. Ported speakers sound a bit confused. The further thing from reality, for sure.
I thought he is deliberately trying different things. I did not realize there is a struggle here...
The recordings sound different altogether, flat and bright, did you use the same microphone?
Not hearing the slam you are talking about, in fact, they sound lean, and missing the bottom octave, maybe its YT, don’t know...
@carey1110  Yes, I listen through my Sennheiser HD 820 (Apparently others share my findings). Glad you like it, it will give me a headache in no time. A pity Jay does not put anything challenging, like symphonic music, on.    
Perhaps I am allergic to the Wilson, I get a headache a few seconds into any song since they arrived. Acoustic guitar sounds grainy and plastic-like, nothing like the real thing. No weight and a persistent halo to the voice. HIFI sound at its full glory (I even waited a bit, I don't think its YT) 🙁
You already had MUCH better speakers in your place (Magico and Focal). There might not be a "best", but some speakers are clearly better than others. The XLF were one step too far. Now you know...
@ron17
Both M2 and M3 MPods height is adjustable from the top. The M6 Mpods height can be adjusted as well, just not as conveniently.
@viber6

Time alignment is most important for clarity and focused imaging. Wilson is the master, and I wouldn’t consider any dynamic speaker company that ignores time alignment.


Wilson is neither time aligned nor phase coherence, its marketing BS.

The Magico M9 can produce lots of bass, but the reviewer implies the overall effect is a big sound which is unfocused.

Yeah sure, more fiction. Please share the review with the rest of us...
@viber6
Henry201, what evidence do you have that the large Wilsons are NOT time aligned nor phase coherent? Dave Wilson sought time alignment, which is thoroughly expressed in the setup procedures.

Time and phase behavior are easily measured. All Wilson measurements, over the years, and in all publications clearly shows that they are neither Time aligned nor phase coherent. Wilson himself has never shown a measurement that supports his claims. That is probably the biggest lie in the audio industry. Before you bother to reply, please read on the subject a bit. This is not a question of opinion; that’s a simple, measurable fact.
@viber6
I am interested in these facts about how Wilsons are not time aligned, but you haven’t provided any links to support your claims. I don’t know whether you have the time to do this. As a practicing physician, I don’t, and would appreciate any information you have the time to provide.
Some essential effort on your part should take place. You can start by reading JA article on loudspeaker measurements, he explains, and show what a step response produced by a time-coherent loudspeaker should look like. You can then look at Wilson measurements, and see that none are. It's easy.
https://www.stereophile.com/features/100/index.html
JA conclude:
"Many loudspeakers are claimed by their manufacturers’ marketing departments to be time-coherent. There are also a number of speakers that have sloped front baffles, implying that they are time-coherent. However, its step response immediately gives you an indication of whether or not a loudspeaker is time-coherent. And almost all loudspeakers are not."

@ron17

And this year Stereophile’s speaker of the year is Magico’s A5, while last year’s speaker of the year was Magico’s M2...starting to see a pattern here.

 

Too bad he sold his Magico, he could have used a good speaker now, finally, that he improved his front-end.

@jays_audio_lab

Not sure what you mean by "now that i finally have a good front end" as if i haven’t had a good one before

 

Yet you only now discover that local files sound better then streaming🙄

Actually, all things being equal, a sealed design will go deeper (12db vs.24 db roll-off on ported). 

@keithr

Also disappear more and measure better (if that’s your thing).

That is factually not true, the YG do not measure better then Magico, nor many other speakers, and you can easily look it up. There is a lot more to a speaker than the flat on-axis response, which is the only thing the YG has to offer, its not nearly enough and some will argue not desirable (I used to buy in to that, but not any more - the A5 clearly demonstrated it for me). I have been reading your commentary on the Magico for many years, I have to say, you either never heard them set up properly, or your objectives are totally unclear to me. You searched for years for the “perfect speakers” you bought the YG’s, but you never were able to get them to work. That should tell u something.

Don’t rush to buy the S2500 (or any PC). You may not hear much difference without the Boulder and the Magico.

@viber6

I happen to think Jay’s Magico S7 speakers have much more articulation and detail than the M6 he had.

Always so fast with dubious conclusions 🙄 It’s about time you realize it is about the entire setup, especially when it comes to such a transparent product like Magico. You have not heard the M6 on anything remotely as good as what Jay has now. You can’t begin to speculate on the M6 sound, let alone the M9. Hopefully Jay will revisit the M6 (or M3)

I never stream for critical listening. In my setup, it's never as good as ripped files and definitely not as good as direct from a CD transport (44.1 that is). Also, if streaming files are ‘untouched’, why there is such clear differences in SQ between Tidal and Qobuz?

Yes, same files so called "CD Quality". SQ on my set up is definitely different.

You can try any title you wish. They don't sound the same. Am I listening to the exact same thing? Only Tidal and Qobuz know 😐

That is my experience, regardless the setup, if both services sound the same to you, that's perfectly fine. 

 

According to Tidal (which is in the link you just sent), MQA compression scheme is only used on their Master Quality files. I am talking about their "HiFi" service.

"TIDAL HiFi provides uncompressed lossless sound quality, streaming at 1411kbps or 16-Bit / 44.1 kHz."

Should be the same "CD quality" as Qobuz.

This amp is practically broken. JA measurements conclusion: "Presumably, the left channel’s higher levels of distortion and noise and its higher output impedance than the right channel’s are sample-specific." Yet these guys are raving about it 🙄

If that is what they sent MF, what are you going to get :(

@viber6

Both the Harbeth and Magico videos show the importance of stiff drivers.

LOL, Harbeth stiff?? The cone is made of injected molding plastic, it might be more rigid than polypropylene, but stiff it is not. The guy is bending it with his fingers, I don’t think he understands the meaning of stiffness. I don’t think you can bend a Magico cone that easily 🙄

Harbeth are fine for what they are but have not much in common with Magico.

 

Perhaps, but they come with their own plethora of issues and, as you mentioned, limited dynamics. They are also, indeed, colored. I clearly hear a plastic sheen ridding on the music. Not a perfect nor preferable solution either, IMO

The electrostatic principle is the purest transducer

No it is not. There is no such thing as "purest transducer"; electrostatic elements have their pros and cons, just like any other transducer principle.

Wilson, Focal, Magico (M9 only) speakers’ drivers are concavely directed for perfect time alignment.

Wrong again. None of these are time aligned.

@viber6

This respectful dialogue is beyond your comprehension, so ignore and bud out.

The amount of nonsense you are spewing is indeed beyond my comprehension
( including the ’respectful’ ending of your reply).
At least try and get your story strait, is it electrostatic or is it plasma??
Not sure why you insist talking about stuff you have no knowledge of. Stick to impressionism, then you can get away with anything ;)

@Viber6

Incidentally, you don’t know how to spell--"get your story strait." You surely know the junior high school level differences in meaning between "strait" and "straight", but how do you compose a sentence which demonstrates fuzzy thought processes?

Thank you, you are kind, as noticed already. Of course, you got me there, as English is not my first language. I am glad you did get the point, though.

Keithr is a "registered Magico hater". For years, constant drip of unfounded hate on all channels possible.

So sorry Keith, but maybe your comment sounded like Alon has nothing to do with the products, hence the reactions🤔 You are back paddeling now, which is fine. I don’t think anyone thought that Magico is a one man show.

All one need to do is search "Magico" Posted by" keithR" on WBF. Hundreds of posts mainly of unfounded hate. You’ll notice they hardly make sense if you bunch them all together. I wonder if he ever even heard a pair.

The funny part is that after years of searching (and hundreds more "KeithR’s Dream Speaker" posts), he ended up buying a speaker he can’t/will not use (YG Hailey). I don’t blame him, they are not that good (and I like YG). I did consider them but ended up with the Magico A5. A MUCH better speaker at half the price. But KithR will never admit to that 😶

 

@viber6

Alon refers to the A series as "mundane"...

Did you watch the video? Where did he say that?