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!


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Showing 50 responses by spinaker01

Jay, your videos might as well be podcasts as the camera is just in one static location all of the time showing a single view of the equipment. I get more insight from this thread than your YouTube stuff. Just saying I think your efforts are better spent here.
Techno dude makes a valid point. How can you change virtually all of your components and then compare the sound of a new addition (constellation) to your distant aural memory of another unit (Luxman) which was in a totally different system? This is the very reason good reviewers try to keep a stable system configuration and then change/review one piece at a time to ascertain it’s particular virtues and shortcomings. Not trying to rain on the WCSS parade but any comparisons need to be qualified. You never know, you may actually prefer an amp you previously tested -and moved on from, now that your system has changed so dramatically. Any chance you might revisit a previously owned amp to test its capability in the new rig?
WCSS, Congrats on your thread surpassing 10,000 posts. Viber6, congrats on contributing a full 10% of these with over a 1000 posts to this thread and NONE to any other. We appreciate your untrammeled and single-minded obsession
Whitecamaross, With the changing out of your speakers a couple of months ago from Martin Logan to the PL500, have you ever considered revisiting any of the numerous (dozens & dozens) of amps you tried before? The electrostatics present a vastly different load type to any amp versus a dynamic speaker and some of the amps you were perhaps less than enthralled with may now turn out to be real champs with the Monitor Audios - and perhaps a couple of bargains in the bunch. I know going back over old ground is the last thing you want to do, but all of your previous observations are really only valid with that ONE speaker which you no longer own.
I don’t believe I have ever heard of the Salon 2s accused of sounding both lacking in bottom end and muffled. My experience on hearing them in several rooms and systems has been just the opposite-they are a very neutral and full range transducer. Not saying they don’t sound that way in your room or that the PL500s don’t sound excellent, just that your comments on the Revels  run counter to the VAST majority of user opinions and my own experiences. But hey, it’s not your cup of tea so fair enough, the 500s sound like a speaker I do need to check out some day though.
Your exuberance for the Rowland’s is admirable, but your long history of churning what was so recently the “best thing ever” tells me they’ll be traded out for something else in a few weeks. Hope to be proven wrong though. I’ll like to see you settle down with a reference for awhile to get the true measure of an amp over a longer term in your system. 
Spinaker01 posts05-05-2018 7:38am”Your exuberance for the Rowland’s is admirable, but your long history of churning what was so recently the “best thing ever” tells me they’ll be traded out for something else in a few weeks. Hope to be proven wrong though. I’ll like to see you settle down with a reference for awhile to get the true measure of an amp over a longer term in your system. “

So the Rowland’s lasted less than a month then? Well I guess there’s still Vitus, Gryphon, Dartzeel, D’Agastino, Constellation, etc. left to try. Seems like an expensive way to work your way to the “Top” but hey, it’s an interesting ride...
...At the level of amplification your’re considering, are you sure the Shashas 2 will give you everything you need to discern the differences? Maybe time to look at the Alexx or XLF lines? I would have to think that the deep end of the Magico or Rockport product lines would also contain some contenders.
You may just be approaching a final destination with this setup. Try to keep this one together for more than a month to get a complete picture of what it can provide. Maybe after that some mild (not to be confused with cheap) cabling adjustments to fine tune to taste. Hard to imagine any meaningful improvement to that combination short of spending a half million. Good luck!
austinbob, he has changed speakers 5 or six times. He had the Martin Logans, Revel Salon2, Monitor Audio PL500, then Wilsons Sasha I think. The Vivid's are the newest audition.
I have to agree with shadornr, much as I respect the Focal Soprano line, they are likely a step back from the Wilsons. I would look upward in the Focal line to the EV Utopia stable
I think the Focals will have more apparent bass and could sound somewhat more lively-at least initially compared to the  Magicos, but over extended listening, I think the Magico will prove to be the more accurate and satisfying speaker.
Mauidj, what was it about the Krell 401e that wasn’t working for you? I would have thought this to be a pretty good combo with the Salons.
Shadorne, your attachment represents a dip in the high frequencies, but does this relate to a specific SPL compared to a flatter graph at lower power? Otherwise it’s just a frequency response plot - not related to power compression. 
Welcome back WCSS, this thread devolves into many side discussions when you’re not around to post and keep it on-topic.
You might as well go for it WCSS as Viber6 has completely taken over this thread as his own!
“I have a feeling some users are pushing Lyngdorf big time, it’s not even fun anymore...I feel being caught in a marketing operation”

Glad to hear I’m not the only one sick of these guys pushing/pimping Lyngdorf. Yeah, it may just be the greatest thing ever, but it gets tiring to hear these fan-boys pushing it every second post. WE GOT IT ALREADY! and so does WCSS. 
WCSS
On the topic of digital EQ, I have to say that I’m a relatively recent convert to Roon but now a big fan of the digital EQ offered. The parametric bands and controls are very flexible and introduce much less time/phase/distortion artifacts  than any analogue EQ - and significantly less than an old Rane unit designed for semi pro use. Try going one step further and getting a decent measurement mic and REW software. This way you can “see” what room/speaker  issues you have and you can then use this data to guide you for placement of the Neoliths and any possible room treatments. Then you can introduce compensatory curves through the Roon parametric program. This at the very least, brings some scientific methodology to your process and provides some repeatability to your efforts. Even if you determine that a “flat” sound isn’t to your tastes, you still have a reference baseline that you can then overlay your preferred palette to get you one step closer to perfection. You can bet your speakers weren’t design solely by ear, why should you be content to set them up without the benefit of a scientific prochess?
Viber6

Spinaker01,

Does the Roon do EQ in all freq? How do I find out about the Roon?

Viber6, yes the Roon parametric seems to accommodate any frequency I can throw at it. It is incredibly flexible and beneficial in my system. I only use a single band of EQ: 3db of cut centred at 600 Hz with a Q of 1.0. This is a pretty mild curve but makes a huge difference in my system/room configuration. For info on Roon, the Absolute sound has just published a fairly comprehensive article today on their website, check it out 
Viber6, why are you here? Rane? Emotiva? Zip cord? I’m sure that the guys over at the home theatre thread would (might?) welcome your drivel, however you’re certainly wearing out your welcome here “Doc”. You bring no value to this discussion or WCSS’s adventure.
WCSS, I have to commend you on your improved listening skills as your journey continues. There was a time when I think you would have passed judgement far too early and possibly dismissed these out of hand. Glad you are realizing that real evaluation on any new addition takes some time. Cheers
WCSS, I can assure you from 25+ years of ownership that a 3 ain’t nothing like a 7 series and a C ain’t an S class either.
WCSS, I don’t know about acoustic treatments but I am taken aback by what appears to be your most long standing component-that crappy rack! I mean, considering the amount you have spent on gear -even your cable cost is approaching 5 figures and yet, you are still using that homemade looking, vibration inducing flexy stuff most of us outgrew when we left the college dorm along with our cinder block furniture. Seriously, investigate some of the incredible options out there. I think you are missing out on the benefits of isolation and vibration control that could take your system to yet another level.
Viber, you are correct, I don’t accept any of your posts as relevant, but apparently the moderator deletes all posts of the many people here who hold the same opinion.
Dep14, agreed I was looking to see if this function exists in Agon but no luck. We’ll just have to enudure the drivel I guess. 
WCSS, I am curious. I have been following all of your threads from the beginning. Given the numerous changes in your front end, pre and amplification, speakers, cables AND listening room, is there any gear combinations (or possible combinations unheard) that you would like to be able to revisit? Maybe the PL500 with Block amps perhaps, or the Salon2s with the Lampizator for instance? I’ll be at Axpona next week maybe we’ll run into each other. Cheers
I am generally not a horn guy, but I have to admit I was impressed by the Ocean Way speakers and floored by the Large Avantgarde system playing Pink Floyd. The large room and $100 grand of supporting Esoteric Grandioso  electronics didn’t hurt either 
I’m not feeling “Vitamin Deficient” at all. 🧐 I’m looking forward to the addition of the Constellation combination.
Viber7 I agree with you on all points you mentioned. Room first, then speakers then amp. The power infrastructure is a good idea but effect varies depending on the quality of the house wiring (and external) components. I generally find newer neighbourhoods under 10 years old to be pretty good
Ricred1, I have heard some great things about the Isoacoustics GAIA speaker footers. There was a back to back demo on YouTube of all places and even through this recording, I could hear the (positive) difference they made. I think the site was “pursuit of perfect system” a Brit site. Not cheap, but in our crazy audiophile world, they could be considered bargains compared to some of the snake oil products out there.
Thought Briano4's post was excellent. My satire radar is always spinning I guess.
Interesting that are once again thinking of the Salon2’s for your system. This would be what...the third Time? Not that I would blame you, they do so much right and even 11 years after their release they still hold their own against most newer (and much pricier) contenders. They are however, very hard to drive but I think your journey has given you a new understanding of what a power amp can do for a speaker. I also think the others you have short-listed are very capable performers, you may want to add Rockports to your list. Should be very interesting. 
I know it’s still early days yet, and almost everything, including your room is different but: how would you describe the Scalas to the Sopras you had some while back? Thx
WCSS, I for one applaud your willingness to at least try the Boulder preamp given your being less than impressed with the amp you tried. Keeping an open mind is important. Also, as so much has changed in your equipment and room, who knows, you might even have a different opinion on the Boulder amp if you were to audition it now. Good luck, and let us know what you find. Cheers
Theophile,
asking Viber6 to stop vomiting dogma is akin to asking the sun to not rise in the east...not gonna happen
I hear and understand you whitecamaross. I’m really not trying to insult you as I do appreciate your journey and my vicarious enjoyment of same. I will say that I think that maybe, for the first time you have a room even remotely worthy of further equipment analysis. I think if you were to revisit past equipment your opinions might even be quite different based upon the current room context. But at the end of the day, you journey does seem to mirror my own and we all live in he real world. Keep on listening!
Yeah, because when I want to increase my soundstage, I always think of inserting a 30 year old piece of phase shift-inducing semi-pro frequency mangler. If you need this to clear “mud and fog”, your system, room or your sonic priorities are terminally broken. There is no hope for you
I use a judicious application of parametric EQ in the digital domain via Roon. I understand the benefits but I’m not inserting a piece of mid-if junk into my system to get it. There are just muuuuch better ways to implement it now. V6, my issue with you is less the what you say but the how you say it. The words preachy, obnoxious and pontificating come to mind. Like when you start a response to WCSS that he is “wrong” to not submit to injecting your POS Rane into his system. Who are you to judge anyone? Anyways, I’m wasting my time with you, you're just content to infect someone else’s thread on a daily basis with your myopic drivel