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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Top Amplifiers By Retail Price

This is a list of the top amplifiers that i have experience with. If you don’t see an amp make my list, it might be because I haven’t owned it or I personally did not feel it was a strong candidate to make the cut.

Without further due, here we go:

TOP AMPLIFIERS UNDER $12K

1. Jeff Rowland 535: Excellent clarity, bass control, dynamics and speed. Soundstage could be wider (but remember I have power hungry Martin Logan Neoliths). Nothing is lacking, but it does not have the “finesse” which is expected since that is what the model 935 has in spades. This amp takes the number 1 spot because it is the cheapest amplifier of the bunch which means it gives you the greatest bang for the buck plus It can also be bridged to add more power. I think this is perhaps the best Class D amplifier i have ever heard. 

2. Plinius SA 103: Excellent Class A power amplifier. It has detail, clarity, and never fatigues. Its bass is not at the level of the Jeff Rowland 535 (can sound a little bloated when pushed) but it has the highs you’d expect from a Class A power amp (liquid, pour out of the speaker). This has the highs that the SB301 MK2 does not have. It is the amp that would shine if you love musicality over bass control.

3. Plinius SB301 MK2: Awesome bottom end. It just slams each note with grace and authority. I think this amp takes the 3rd place because the highs are not at the level of the Plinius SA103. If you were to compare it to the best amps out there, you would notice right away that it has a little grain without the last ounce of refinement that can be expected from a Class A amp for example. I personally value highs over lows. This has the lows that the Plinius SA103 does not have. If you want bass control for your speakers, this sucker is it. 

TOP AMPLIFIERS UNDER $20K

1. Luxman 900u: This amp easily beats the rest on this category list. Incredible musicality, smoothness, very quiet, insane build quality, easy to pair it with any preamp and it just sounds awesome with every speaker I have owned. When used in mono, everything is just bigger, more enhanced and the bass becomes tighter. The very best 150 watts per channel I have ever heard. The highs are sparkly, mids very tube-like, but the one negative would be that you could end up listening to music until 3am like I did. No other amp beats it for the money (that I have owned)

2. Simaudio 860a: Awesome 200 watt per channel amp. It runs cool (unlike the 900u Luxman), incredible highs, mids, bass. One thing, this amp is designed to always be left on because it needs a few days of warm up before it begins to shine. It drove my Revel Salon 2s with ease which was totally unexpected because they are not an easy load. Very beautiful presentation with a big soundstage that opens almost wall to wall. Lovely amp. Why is it behind the Luxman? because the luxman  has that lovely sweetness that is lethal for many including me.

3. Hegel H30: Very neutral, monstrous punch, visceral bass attack. That said, it does not have the musicality of my top 2 picks above. It is just a neutral amp that will give you what you put in it. Construction is a little suspect in my opinion. Does not seem as well built as the Luxman or Simaudio, but besides that this amp is really a powerful amp that will take on any speaker without breaking a sweat.

TOP AMPLIFIERS UNDER $30K

1. Luxman 900u Monos: Incredible soundstage width and depth. Clean, liquid, smooth, musical, and a hell of a lot of fun. For the money, NOTHING BEATS IT. It really sets a benchmark for the money. 

2. Musical Fidelity Titan: Can power an entire nightclub with ease. This amp has perhaps the LARGEST soundstage I have ever heard out of my Neolith. Incredible bass control (easily beating any amp above ). I believe this amp kills the Mcintosh 1.2kw at all levels. NO CONTEST. If you want sheer power, control, huge soundstage, this is the king. The only downfall is it is heavy and it is not easy to find on the used market. It has been a silent killer on my list

3. Mcintosh 2301: Shocker huh? I believe this amp is an incredible amplifier and perhaps the best amplifier that Mcintosh has ever built. It is very engaging, musical, fun. It has great mids and highs, but the bass could use a little more control (which is expected from a tube amp). Every time i turned this amp on, i was happy with what i was hearing

TOP AMPLIFIERS OVER $30K

1. Constellation Centaur 2: This was a tough call. I could see the Block Audio as #1, but because the Centaur 2 is so musical and very LUXMAN-LIKE in terms of sound, it is just easy on the ears and listening sessions become long. Downfalls? Expensive and very big…

2. Block Audio SE: This could be #1, but I prefer the Centaur’s presentation. That said, Block audio is a race car in terms of speed, monster bass control with its 5,000 damping factor and a level of Class A liquidity that Pass Labs only wishes to duplicate. I see this amp as an improved Pass Labs. In my opinion, THIS IS THE BEST BUILT AMPLIFIER I HAVE EVER OWNED. Downfalls? HEAVY @ 98kgs.

3. Jeff Rowland 925: Beautiful, clean sounding. Very SMOOOOOOTH, non-fatiguing, excellent construction and an incredible level of transparency. Only CON? Soundstage is not exactly the widest I have heard and it needs too long of a break-in. Incredible build quality that looks like a ROLEX. 

4. Pass labs XS150: Amazing Class A clarity with bass control. Mids, lows, highs are all there in spades. Why #4? HEAT… they will make you sweat like you are in a sauna and they need just too much space. They also don’t have the extra ounce of finesse in terms of highs and mids as my top choices from this category. 

TOP DISSAPOINTMENTS:

1. Pass labs 350.8: I liked this amp at first, but once I tried the luxman 900u it was rather apparent it is so far behind from its direct competitors. It is a huge amp that really makes you wonder WHY something is so huge and not sound as good as it looks. It has a decent presentation, but it does not grab you or make you sit and listen the same way the Simaudio 860a, Luxman or Plinus SA103 would. They must go back to the drawing board with their .8 series.

2. Classe Audio CAM600: These amps are lifeless. No soul, warmish, nothing really jumps at you and those fans on the back can be annoying at times. I would much rather own the old CAM400s over these.

3. Mcintosh 601s: I just don’t know WHY would anyone buy these amps over a single Luxman 900u. Is it the gauges? The look? I am not sure because it sure isn’t the sound. Nothing about these amps grab you at all. Nothing jumps at you so this is just a good purchase in terms of investing your money in something that won’t depreciate as fast as some other amps on this list

4. Boulder 2060: Excellent construction that just doesn’t deliver any sort of WOW factor. It sounds NOTHING like Class A. Very cold, sterile, boring, lifeless, etc.

5. New Line of Krell Amplifiers: They have fallen behind in so many ways. I’ve owned some of their new stuff and the highs are just not there anymore. I don’t know why, but I don’t like how their design creates so much class A, yet it does not sound like pure class a to me. They lack emotion, soul, etc.

BEST AMPS OVERALL FOR THE MONEY:

1. Luxman 900u: This amp simply wins the overall category due to its sound and price. It really is number one because it brings SO MUCH performance for the money and easily shows you the kinks in the armor of other manufacturers.

2. Plinius SA 103: Given how much this amp can be had for on the used market, it is a steal what you get for the money. I love Class A and THIS IS THE MOST AFFORDABLE CLASS A amplification you can get. I prefer this amp over any Krell amplifier I’ve owned. I prefer Class A over Class D

3. Jeff Rowland 535: This is a steal for the asking price. Extremely clear sounding amplifier that might sound even clearer than my top picks here, but it is Class D and it won’t engage you as much as a Luxman 900u. However, it has thunderous control, speed and dynamics in spades and some of you might totally appreciate that over the heat of a Class A design.

That is it folks, if I you don’t see a certain amp here, it probably did not leave me with a long lasting impression. Enjoy!


@whitecamaross 

Excellent, concise review. So much appreciated. I really like the big Luxman myself. I get to hear it with the matching preamp at least once a month. Very good sound quality, build, and appearance. It is just a beautiful combo to listen to and to behold.
WCSS, Thanks for your rankings, the Rowland 535 fares better in this list than when you posted about it earlier. I'm sorry it didn't get more time in your system before the Constellations arrived. Regarding the "new line of Krell", did you mean the XD updated Krell?