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

Probably not Luxman separates, but maybe something like Gryphon Essence and a REF6SE (which would be more than $30k but you get idea).  I'm pretty confident that would destroy any $3k amp, though of course I haven't heard the one you're talking about.

Gryphon Essence has been the star of 2021. I never saw that coming. I have been vocal with those who own it. There is no better amp under 25k (that I’ve owned) that beats it.

You’d have to spend 40k+ MSRP to top it.

Some of the people who I’ve helped through my consultation service have been looking for one on the used market and can’t find one. Another great amp is the simaudio 860v2. It would probably be the best amp under 20k if I had not owned the essence. Don’t disregard the 860v2 because it is quite awesome too. It throws a huge sound and awesome bass control.

Word on the street is that Gryphon is getting to release a new quarter million dollar statement amp to come after that tier group of amps (relentless, boulder 3050, ch 10 series, etc)

Over 350 lbs per mono... I’d do just about anything to get my hands on one of those. Nothing excites me more than Sherman tanks that walk through concrete walls like if they were made from cardboard. We always hear class d, class d, class d, etc and then gryphon does this 250k amp and silence enters the room because there is no answer for something like it. It’s as if it slams the door in the faces of those who believe class d has everything needed to kill cost no object class a amps. We all know that isn’t true (not yet anyway). 

I wonder if someone will ever build a cost no object class d amp that doesn't have the excuses of " oh it didn't best that class a amp because it is far more money, but it got close enough almost to the point of defeating it"

 

My answer is: "it don't matter if you win by an inch or a mile... Winning is winning"

If you can afford anything.....then yes, go for it. However, the average Audiophile has maybe 20K in the entire system.

GaN amps are not warm....they are not cool,....they are not dry....because of the use of GaNs. The output device in a class D amp is a switch.....not a normal amplifier. The sound of a class D amp has to do with many many things. Mostly it is only as good as the designer is TWEAK......ie....he listens. Most all modules made by manufacturers of class D are designed by engineers that are not tweakers. The reason why the AGD class D amps sound so good is that the guy who designed it actually listens. The LSA modules were listened to by a bunch of people over time....so has SOME tweaking going on. The AGD as lots of tweaking going on. The AGD amps are the new class D reference from evreything I have read. Jay should get in a pair of the $7500 Audion’s just for fun to see how they perform. Of course, 80 watts into 8 and 150 into 4 might be a problem. The new higher powered module from Pufifi is coming out next month and is suppose to sound better......a tweaked version with discrete input stages (around $2500 for fully modded stereo amp) version of that could be very exciting (no GaNs in the Purifi). The $6K new Mytek GaN amp might be good but Mytek is not that tweaky.....so well see about tthat one. The $5300 mono block GaN amps from Atma-Sphere are out in small quantities and he claims everyone who has gotten one is in love....we shall see. You see, there are lots of options for those that cannot afford the big guns but do not want a tube amp......lots of options.....and class D is one of them.

GaN transistor are a better switch...faster with less overshoot....so, everything being equal then the use of GaNs should make a better sounding amp.  However, everything is not equal.  One part does not make a whole.  Everything has to be done to the nth degree for perfection to happen.  GaNs are not a revolution.....just a better part that CAN help the overall sound.  It is up to the designer/tweaker/listener to optmize his product for best sound.  

May you be always filled with joy.

Owning an amp that is impossible for one person to lift and move around easily is now a no no for me ( and yes, i do own such an amp). The idea of a 350 lb amp that needs a jack to be lifted, or moved around,IMHO is a dumb idea. While the amp may sound like heaven, the fact that it has this non-user friendly aspect is more than off-putting. I guess there are folks who won’t care about this, since the sharp edges that will slice your hands and the sheer weight that will break your back won’t be an issue for you with the hired help, BUT for everyone else???

Approximate weight of above mentioned class D amps:

Stereo LSA......22lbs

Strereo VTV with new high powered Purifi modules.....12lbs

AGD Audion's    6 lbs each

The new unreleased Mytek stereo amp .....15-20 lbs?

Atma-Sphere 100 watt a channel mono amps.....15lbs each?

Other great class D amps......like Orchard Ultra GaN stereo....maybe 15-20 lbs.

You can do multiple reps with these babies......take them to your buddy's house to compare, etc.....less heat.....less money......very, very good sound.

I would mention the Cherry amps (great sounding and not very expensive).........but Tom at Cherry just died from Covid.....so not sure it they will be available.  This happened suddenly......please get your shots.....could save your life....or someone elses.

https://www.audiocircle.com/index.php?topic=179605.0

Stay safe and happy.