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!


whitecamaross

Showing 17 responses by tjassoc

Whitecamaross,
We integrated our stereo into a home theater system, with an emphasis on stereo.
We have two Pass XA-200.5's (mains) and three Pass X-250.5's (sides, center/sub, rears) with Meridian 800 digital electronics and Wilson speakers.
Regarding the heat - it's nothing our central A/C can't handle.
Regarding the sound quality, when I took our family to the movie theater - our 2 children both said wow once the show started. I impulsively asked them if everything was OK - and if they like the gigantic screen? They both said they were amazed on how good our home theater sounds!
Me, I enjoy music and reading your reviews.
Keep up the good work and thanks for your insights :-)
whitecamaross - so hoping you get the Alexia II's.
It's the speaker I've been wanting to get.
It would be fantastic to get your perspective on them.
whitecamaross - I had the good fortune to meet and talk with John Atkinson. I believe he's more like us than he is different. That said,  I'm fairly certain that he is aware that he is employed by a magazine that promotes our high end audio equipment commodity and industry.
He better serves everyone if he states things positively - equipment manufacturers, consumers, the magazine that employees him and the industry in general. 
He is undoubtedly aware of the impact of his statements, and attempts to get the best performance from a product and accurately describe it's character, it's strengths and weaknesses.
I don't think we would want to rip apart a company's product and possibly contribute to it's demise, but rather demonstrate the product in the best possible light - while accurately explaining it's weaknesses.
The only exception I take with the magazine is they usually don't evaluate a product that doesn't advertise in (and support) it's magazine. 
Guys, can we leave this thread for whitecamaross to share his experiences with us?
Taking the thread sideways does no one good.
Contributions from others are great, and we are all different. whitecamaross has keep his thread going because many AG members are interested in what he has to say.
Can we let him and his thread continue without the getting adverse with each other?
Unfortunately, the Wilson speakers are out :-(
They cannot be bi-amped.
I still am looking forward to whitecamaross getting a pair of Alexia's in and what he has to say about them. I've only read good things about them and would like to have a pair in our home - while series II would be nice, I'm confident series I makes beautiful music.
Fed Ex is delivering our front end electronics today (Meridian 861v8 and 800 transport), they were out for repair / upgrade - so my family and I are eager to listen to music again.
techno_dude - I'm a Wilson owner, for decades with over $72k invested (stereo and home theater with a major priority on stereo). So, I'm admitting that I'm Wilson biased when I say this:
Martin Logins are a special speaker, I've heard the 15's. They were paired with a Rel sub-woofer and I was stunned with the dramatic improvement in imaging the Rel sub-woofer made. With the right music, I was very impressed with this pairing - very. 
While I'm eager for Alexia II's, I'm baited to read whitecamaross describing his Neoliths.
Fed Ex left us a note yesterday, couldn't leave our Meridian delivery because no one was home to sign. Delivery is due back today, can't wait to get our system operational.
whitecamaross and techno_dude - the size of the panel makes a dramatic difference in the speaker, and it effects much more than merely the size of the imagining (imaging being a critical issue).
The size of the film allows the speaker to reproduce signals with much greater coherency, fidelity, dynamics and authority. The speaker doesn't work nearly as hard and experiences significantly less distortion (something I observed with a pair of Vivid B1 speakers I got to demo in our home). Increasing the (active) driver size improves both strengths and weaknesses of this speaker.
What I immediately recognized with the ML's I heard was how well integrated they were (they use a single Mylar film driver with a crossover for bass only). Few speakers match it (in this regard). Think of Quad's (EL34?) and how well they reproduced midrange rich music. Reminds me of the Classic 60 and then the V-70 Audio Research tube amplifiers I enjoyed early in my audiophile journey. Beautiful midrange, decent highs, fat bass. But beautiful midrange - few could match it, none for a competing price (at that time).
Well, think of the Neoliths as a fully integrated version of the Quad's.
I would be shocked if it didn't sound better than the Alexia II's - it is almost twice the price.
We're starting to get into a serious performance level, so evaluating things becomes critical. Small steps make dramatic improvements in the rendition / illusion of a live performance. And in my humble opinion, at this level - recreating the illusion of a live performance is what it's all about.
PS: Even a statement piece like the Neoliths are not without limits. 
PSS: whitecamaross - I've never written this much on a single post. We're ALL awaiting your evaluation(s)  :-)
mikepaul - our Meridian pieces came in, Marc Koval did the repairs/upgrades. Marc has become our "go to guy" of all things Meridian since our local retailer no longer carries the line. Marc is EXCEPTIONAL!
Work and supporting our neighbor (who's 21 year old son OD'd) has kept me from setting up and configuring our system. I apologize for the negative in such a positive thread.
I will most certainly post once our system gets up and breaks in.
Have to admit, I'm really eager to what whitecamaross experiences with the Block amplifiers, a quick inquiry from the provided links seems very promising.
We have a great group and an special leader in this thread!
Viber6 - I would really enjoy the opportunity to share an early evening of music. I live in central NJ and am finding your offer hard to believe (meant in the most complimenting way)!
Count me in, I am very much looking forward to the experience.
Thank you for your kind, generous offer!
Most sincerely, Thomas Foti.
I thought this thread was great before . . . .
Did I say I can't believe viber6's kind offer?
I'm humbled and grateful viber6, very much looking forward to meeting you!
Thank you again for you kind offer :-)
Whitecamaross,
First - a safe, healthy, prosperous and Happy New Year to all :-)
I've heard the Lamm 1.2's, a while ago but the key points still very much remembered. The equipment was familiar - Wilson Sasha I's, Meridian 861v6, high end MIT Oracle cables. The listening session was an extended, private session at a high end retailer in NYC with other audiophiles.
I was doing this because we were going to invest in amplifiers for our integrated theater system (our set up has an emphasis on 2 channel audio) and I wanted to specifically evaluate the Lamm 1.2's.
Before I comment - I have to state when evaluating equipment (and set ups for that matter) that my personal objective (with our system) is to recreate the live performance as convincingly as possible, with my reference being actual live performances. While I cannot compare all recorded music to it's live performance, critiquing a system in this perspective distinguishes components in a manner that is different from outright performance. Case in point with the great Lamm 1.2's.
Our current system, while not near the level of performance of your system / components, strives to accomplish this and does so convincingly (I was astonished when our son played his saxophone in our music room and I play some well recorded saxophone music). Room acoustics play a very significant role as well (being an engineer, I crudely treated our room with good results).
Back to the Lamm 1.2's - after CRITICAL listening to Momentum amplifiers (the most similar to our own Pass XA200.5's but reviewed as having better bass in a major magazine - I couldn't tell this in that system and time frame), Spectral amplifiers (SLIGHTLY dry) and Lamm 1.2's (SLIGHTLY bass heavy).
The Pass and Momentum amplifiers reproduce and allow one to hear into the recorded venue as it was performed - something that is critical to me. In this system, most noticeably the Lamm 1.2's produced slightly more bass then the other amplifiers - a critical evaluation here but noticed by all present and confirmed by those present who were intimate with the performance.
BTW - the previous comments on the other amplifiers were also easily recognized and agreed upon by all present once properly described, except for the Pass / Momentum comparison - which is my own comment.
So, while the Lamm 1.2's were SLIGHTLY bass heavy in that system (synergy no doubt playing an issue here), with their performance being very very good, someone who evaluates equipment on outright performance might prefer the Lamm 1.2's because of their slight increased bass. Yet, when compared to the live performance, this SLIGHT increase in bass wasn't natural.
I hope not to get involved in any negativity that has occurred previously in this thread. I'm a humble individual who respects everyone's experiences and opinions and believe everyone benefits from sharing while respecting each other. I no longer have the time to go and evaluate equipment like I used to, and there are significantly less brick and mortar retailers with this level of equipment - so I very much value our sharing. This is the intent I post with.
While I have a million things to take care of daily, I will most certainly assemble a room and system that I'll be willing to share with fellow audiophiles with a sense of confidence. How long it will take me is a good question - and while others compliment our system, I think we all can agree that we're the most critical of our own system when sharing it with others (at least I know I am). I found myself explaining our system's limits / weaknesses after extended listening - while a few very good friends told me to shut up because they were enjoying the music!
Best New Year to all :-)
I have a different perspective, it's not to say my perspective is "the right one" though I will say it's the right one for me.
I strive to assemble a system that reproduces the recorded performance and venue as it was performed, as accurately as possible - as if I / we were listening to the live performance being performed in our listening room. I strive for and admire a component that is ruthlessly revealing. Most live performances I've not listened to, but there are a minority of live performances I have listened to, and our moderately high end system reproduces them pretty darn well.
I strive for components that are ruthlessly revealing because I have found these components to bring the most lifelike reproduction of the music as it was recorded. Bad recording sound bad - make no mistake, and at this level of equipment performance - the quality of the recording is critical. Exposing myself, when wanting to "take in" a great performance, I've become extremely critical of software. But, with great recordings - the enjoyment of listening to a lifelike reproduction of a great performance is the reason I've invested  in our audiophile system. It's for the enjoyment of (the illusion of) live music; great live music stirs our senses and moves our souls!
In addition to the quality of the recording, I've found with our system the venue of the recording is also another critical issue. Because our speakers and room aren't grand (we have Sasha I's in a 16' wide by 23' long room with the speakers across the 16' wide front wall), our system reproduces smaller acoustical performances convincingly and conversely doesn't do nearly as well with large orchestra performances (which I'm fortunate to enjoy live).
In the past when evaluating a component that "homogenized" sounds - that is, made recordings sound more similar (which helped poor recording sound better) - I noticed specific sounds of fantastic recordings weren't nearly as distinguished. I believe we can all agree that at this level of equipment performance, small performance differences (in addition to being very expensive) can be the compelling difference of reproduced music being involving as opposed to being enjoyable (all else being equal).
Without making specific references to equipment, an example of what I'm trying to convey; we were listening to a very well recorded acoustic performance, performed in a relatively small venue - which was great, like really great. Listening through my system - I mean we all really enjoyed that playback. It was a night I'll always remember. Then, I switched to the new component (which I previously experienced but didn't say anything about) and we heard a new, better defined recorded performance. Images were not only better defined and more 3D like, their separation and position, not only being able to identify what / where they were but what they were doing was dramatically improved. My guests just turned to me (after the performance was over) and smiled as if I did a bate and switch on them - all 3 of them! Even the applause after the performance was better defined and much more clearly distinguished as being in front of the performance instead of being integrated within the performance. We could even easily identify where the microphones were placed. Going back to my system before introducing the new component just wasn't an option. I relate this to when whitecamaross shared with us that he heard new things on the Neo's from a familiar recording - a performer walking across the stage which wasn't clearly defined / distinguishable with previous speakers (which I meant to ask if he felt the performance of previous speaker systems could have been improved with tweaking their set up?).
I still am very aware when I listen to really great systems because when I go back to my own system, I become very critical and - in some cases the past, I didn't enjoy my own system as much as before hearing an outrageous system.
So in conclusion for this comparison (for me and without listening to the both components), the Esoteric seems to be the component I would prefer over the Luxman.
We're all entitled to our own preferences, so long as we recognize and respect each others choices.
viber6,
Thanks for the compliment - which I'll happily accept from a well respected source.
Your post is very insightful - I learned quite a bit in addition to being humbled!
WC,
First - thanks for sharing, because without you many of us (me on top of the list) would not get these experiences.
Second - we each have our own preferences, I explained my preferences earlier - with the request that we each recognize and respect each other's preferences. You explained and I certainly recognize the desire to enjoy more music, especially music we've grown up with. There's a lot of merit to that (as I personally experienced disappointment with a lot of songs I grew up with). Explaining "sweatness" and being clear about it allows us to get even more insight with this journey! Again - a BIG THANK YOU!
I did want to ask a question about this past Saturday's listening session (and I don't find it odd that everyone in the listening session agreed on preferences because I've experienced that too).
Were all the cables the same quality / grade level when making comparisons? I'm not familiar with wireworld cables and that's why I'm asking. The same speaker and amp power cables were always used but the interconnects seemed to be different, in addition to being balanced (xlr) verse single ended (rca). I'm uncertain what was used first, then the platinum 8 rca interconnects were used and stated the dac's performance was more competitive. Were these cables the same as the balanced cables used with the ref10 and - most importantly, how do you think this effects the performance in each comparison? I understand the ref10 provides a higher gain output signal and allows for multiple inputs / sources to be used.
Finally - I would REALLY like to get your input on the Pass - XS 300 because these (and the Alexia II's) are the 2 components I would like to get one day (with our oldest going to college next year and 2 additional siblings behind him - I'm uncertain when that will happen). And, if I'm not being too selfish, you could make a comparison to the XA-200.5's (the amplifiers we now have). 
THANK YOU AGAIN for sharing your experiences, it's something I look forward to absorbing within my crazy busy family and work schedule.
To everyone: I hope we all realize to appreciate wc sharing his experiences and preferences, think of what it would be like if wc were to stop sharing with us?
Most sincerely - Thomas (stassoc)
whitecamaross,
I've pm'd you and offered to mail you at no cost a power cord which I found to have the most fidelity of ANY power cord I myself and multiple colleges have experienced.
While our system isn't at the level of your system, it has stunning fidelity and easily reveals component changes. Our system is: the same brand power cords I'm offering but one tier below their top power cord, Meridian 861v8 and 800, Pass 200.5's, Sasha I's, Sound Application RLS power conditioner (for front end components only), and the previous iteration of top tier MIT Oracle interconnects and speaker cables (well over $60,000 retail). I would eventually like to get our speaker cables and interconnects to be the same brand as our power cords (at the top tier) but don't have the funds at the moment (and our oldest will be going to college next year). I did compare the next tier down interconnects with our MIT Oracle balanced interconnects and our MIT's didn't compare. As a matter of fact, this was the post I made earlier here about a component switch I made with 3 other individuals - it wasn't a piece of "equipment" but rather the interconnect!
My offer includes:
1 - you return the power cord with insured shipping (at cables actual cost) at your own expense. You are also welcome to purchase it (terms I addressed in my pm to you).
2 - you not identify the cable (independent of results) until I clear it with the manufacturer (I stated I'm a dealer and need to clear things for multiple reasons).
3 - you not disclose the arrangement specifics with anyone.
After all is said and done, and I confirm things with my manufacturer (independent of results) you can share your findings on this post.
Please respect my reasons - especially if you don't understand them. I'm merely asking you to delay posting the results.
I offered this so I could get your feedback on how this power cable compares to the Odin power cord you have. I want another respected opinion (I would also ask that you switch out each power cable on the same piece of equipment - for the most meaningful, insightful comparison).
I also stated that this is the cable I found with the most fidelity (truth to the original performance) and may not be the one you like best because you define sweetness (very well I might add) as something you liked.
So now I've posted this for everyone to see, and I hope everyone will respect my offer.
Most sincerely, Thomas.