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
Thank you guys. I will try to be as clear as possible as far as what cables will be used and if you guys feel I should not use a certain cable then let me know. For instance, I'm planning to use cardas clear beyond xl on the Monos but would you rather have me use stock powercords to analyze what the nordost Odin 1 xlr and Odin 2 xlr will do vs audiomica xlr and speakers cables ? That's just an example ... Let me hear your thoughts 
It would have been great to make this shootout using the financed Magico M3 that vanished without ever getting an explaination.
Hey @techo_dude: what is wrong with you? Are you OK? There are only two explanations of your naughty behavior: you either (1) are a 15 years old drop out from school, writing from your parents’ basement, or (2) in serious need for mental help.

If the second, please see a shrink immediately. Your condition can get serious very fast. 
I cannot help you with first though... only time (you growing up) can “cure” that.
WC,
Great question.  Part of me thinks it should be stock cords for a shootout, if you don't have cords from each brand that you are comparing.  On the other hand, better power cords might allow you to better differentiate the two brands, but then it would also introduce the sonic characteristics of the cord.    Best case would be to have decent PC's that are as close to neutral as possible.

Dave
Post removed 
Is there any way to block a user here, in this forum? Like when you block someone in Facebook? It must be, but I cannot figure it out
A simple explaination by WC as to where the « financed Magico M3 «   ( exact quote from him) have been would rest my case. 
It seems my post and a few others were deleted by the moderators. I am no longer responding to techno's posts, and suggested, everyone do the same. 
@thyname....      
There's no way to block people unfortunately. 
As far as powercords, I think going with stock PC on the amps would be best ? What do you all think ? 
Let me hear everyone's opinion so I can put a plan together. I can either do my cardas clear beyond xl or the crap stock ones. You guys decide and I'll put it together. 
I believe the term " financed ", is being misunderstood by, you know who. If you read back, wc states, the Boulder is gone, needed to finance the Magico M3. The way WC used the term " finance ", was to mean " pay for ", meaning, Boulder money used to buy Magico. Financing, usually refers to using " credit " to make a purchase, but likely, not in this case. I hope someone can tell, well, you know who, to read this post, for the explanation. And simply, the Magico purchase, was never completed, for any number of reasons. Considering the dramatic improvement the better power cords have made in sq, I would use them, instead of taking a step backwards, imo. Thank you.
If you are evaluating power cords (PC), then using stock cords to compare to PC A and then PC B is a waste of time, if the purpose is to compare A to B.  If evaluating interconnects or speaker cables, stock PC can be used, but if you have good or great PC already, which are more revealing than stock PC, then the evaluation of interconnects or speaker cables will be easier and differences greater.  The superior clarity of the Focal speaker will also make it easier.  If a Magico has better clarity than the Focal, stick with that as a long term reference, while you flip less critical components like electronics and cables.  I never heard the Muraudio, but like other large highly curved stat panels which roll off HF, it will probably have inferior clarity to Focal or Magico.

The preceding is obvious in your listening room, but unless you get better microphones, I doubt you will be able to demonstrate any of this with your present recorder, but try anyway.
@ mrdecibel
Didn't you just say "I am no longer responding to techno's posts, and suggested, everyone do the same."

@WCSS
As far as Cardas power cords vs stock....In my system power cords (over IC's and SC's) make the biggest improvement in sound and also influence everything else. As much as I hate to say it, I think you have to use stock PC's. If you have IC's and SC's in both or all three brands of cables then that seems like the way to go. Also didn't you say when using the Nordost cables with the Constellation gear " My initial impressions were that they did have SYNERGY but as I sat and listened for hours ... I began to disconnect from the presentation." meaning the Nordost cables were not a great match with the Constellation gear?
https://youtu.be/K1M_hoP_qSA

Here is an example of a video which is recorded with what looks like a quality microphone.
Recording with your phone for audiophile purposes, with ultra high end gear, is far from being professional. 
@ron17.        
Yes I did say that. However, since that moment, I have added cardas PCs on the Monos and that really helped a lot. What I am trying to do here is to see if it makes sense to just use stock pcs or if I should use cardas for this exercise. There's no real way of knowing if the cardas PCs are helping the Odin more or the audiomica more. This is why I think maybe we should just roll with stock pcs ? Also, I've added a new tweak that I haven't shared with anyone just yet and it's not a cable. This tweak helped in many ways and I plan to use it for the shootout and will disclose what it is :)
ron17, Correct, I did say that. I attempted to " rest his case ", and to move on. My apologies. I should have been more specific, by saying, I will no longer post a response, " directly ", to techno, as my words were not very nice, and a waste of my time. I thought my explanation, might have made some sense. I will no longer speak of him. WC, is this tweak, " the new item " you recently added to your system ? Enjoy the cable shoot out......
Nope, this new tweak was something I've wanted to try for myself. It's not big money either but it does help. The other 2 components will be shown in the future. 
@whitecamaross 

I would use the Cardas PCs for the following reason: when you provide the cleanest power to the amps, then you can see, or rather hear, what the maximum the XLRs can bring to the game. Using the stock PCs will choke what the XLRs can do.
WC, I agree with other post members that you should use the better PCs for your interconnect/speaker cable tests. As you experienced yourself, PC make a positive difference sound wise.

If I was in the market to purchase a new interconnect cable, I would make sure that the rest of my system is tweaked correctly (PCs, speaker cables, amp matched to speakers, preamp matched to amp, etc.).

I think your test should replicate a real audiophile life situation.
Ok. It seems that we have different opinions as far as what PC I should use for the test ...

I concur with Pokey77 and others.... I recommend you optimize the power going into your amps, lest the amps will give you much less than what they are capable of during the test, thus largely limiting the validity of any comparison between ICs.


 Cardas Clear Beyond XL would be my PC choice.


G.



Your opinion is flawed , everybody here knows that you have to put the best powercords down stream to get the best of what the interconnects can give the system. Viber , me, and others keep telling you to keep things the same as much as possible when doing your tests.

Get a better microphone. The humble lady in my previous post video has one and she only uses it for the recording of simple social videos. And there is you, WC, an ultra high end audiophile with thousands of dollars of equipement...using a phone to make us decide between interconnects as youtube followers. 
Another vote for using the best ac cords. For years now I'd rather use the best ac cords on amps and preamp than interconnects or speaker cables to hear things but obviously EVERYTHING matters. 
Yes, the video posted by techno has excellent sound from that microphone.  I don't recognize the model of that mike, but it looks like an omnidirectional one.  In professional circles, it is well known that directional cardioid mikes give better clarity and focused imaging.  Narrow mike diaphragms give the best clarity, just as small tweeters give the best upper midrange/HF clarity vs large drivers.  My Neumann KM184 mikes are half inch diameter cardioids, but Mark Levinson used quarter inch diameter mikes in his Rose Music shop and recording studio years ago.  I was jealous--in this case, smaller is better, haha.
In professional circles, it is well known that directional cardioid mikes give better clarity and focused imaging.

That has been my experience as well, in an amateur circle :-)

And that figures to be especially true in a home listening room, with reflected sound arriving at the mic from all angles, and with not a great deal of delay relative to the direct arrivals.

Like Viber's KM184, the Audio Technica AT-4051b mic I mentioned earlier ($600 at B&H) is a cardioid condenser type, in this case having a diameter that is a bit larger at 0.83 inches.

Regards,
-- Al

Post removed 
Guys 
I don't own 20a nordost or audiomica. I only own 15a PCs. It's either going to be stock pcs or cardas clear beyond xlr 20a PCs. 
Wow with your caliber of gear you should have a 20a cord to really hear the gear on hand,  just my opinion.
@WCSS

When you inferred that Nordost cables were not quite a match with the Constellation gear and then later said "Yes I did say that. However, since that moment, I have added cardas PCs on the Monos and that really helped a lot."

That kind of tells me that the Constellation amps need help to be more neutral. I have not had the pleasure of trying the Cardas PC's in my system but have heard that they tend to add warmth and to be more laid back.....If that is what it takes to get the amps more neutral sounding then I can see you going that way.
@rsf507
Ahh... I own 5 nordost Odin 1 pcs and one Odin 2 PC... I mean how many more do I need ? Also, I hardly ever bring power amps that use 20a PC so why would I have more for ? This is why I got cardas 20a PCs and I also have a single 20a audiomica PC coming. I can’t have the same car in 10 different colors my friend ... I need to know how to distribute the money across my system. I bought 15a PCs because thats what most components are and what I have the most use for. Lastly , do you think 20a Odin PCs show up used often ? They do not ... And I don’t feel like spending 16,000 -18,000k in 2 new Odin 1s....it’s a stupid expense. I rather use that massive amount of money to buy the dcs upsampler or another set of speakers or maybe another amp ? ... 
@ron17.      
Yep, that cardas pcs helped things with the Odin  cables. However , maybe if I had Wilson speakers I wouldn't need cardas PCs. Focal certainly benefits from the warmth and musicality that cardas introduces. 
My apologies WCSS I didn't think you had any 20a cords. And you are right that would be very unwise to buy Odin 20a cords at that price. 
Why not Valhalla 2 power cords ? Widely renowned. Still expensive but not like Odin. 
4425 is right. 
Odin 1 pc is      7 x 15 awg conductors.
Valhalla 2 pc is 7 x 16 awg conductors.

I doubt anybody here can ear the difference in a blind  shootout between the two.
huge px difference. way over 10k. for some reason Valhalla 2 has more than half the capacitance. i assume that’s a good thing. 
"I doubt anybody here can ear the difference in a blind  shootout between the two."

I can 'ear' the difference. I have (3) Odin1 PC's and (1) Valhalla2 PC in my system. I have the Val2 PC placed on the component that is the least affected by power cords. I place the Odin1 PC's on the components that are most affected by an upgraded PC. The difference is very noticeable. The O1 PC's are more detailed, have more weight (tighter, deeper bass) and a much better holographic soundstage. The Val2 PC is fuller (warmer) sounding and slightly veiled sounding (only when compared to the Odin1).
I agree with ron17’s assessment above which mirrors my experience with using V2 and O1 PCs in my system. I have also compared the Cardas Clear Beyond XL PC to the O1 and while it may have added bass (which also felt less layered) it gave up too many other attributes in comparison especially dynamics and detail. Depending on the system/components, of course, results may vary, but the differences are clearly audible.
@ron17 & @zprr

I’m glad to read that you both can ear’ the difference too. As a Fellow Nordost owner I can say unequivicolly as you move up the line from Norse to Valhalla 2 to Odin there is a definitive reason why the cost goes up exponentially.

Happy listening! 🙂
Not what I read on whatsbestforums. Valhalla 2 over Odin1. Odin 2 over Valhalla 2.

Anyway, Shunyata Sigma NR is a much better value imho and yes it competes with them all.
Awesome feedback guys on your personal journey with nordost. This is exactly what I like to read in order to help other fellow audiophiles make educated buying decisions.  

And the fellow audiophiles would make much better educated decisions if you were to use a real microphone instead of a phone to record your videos. One of quality on par with the rest of your expensive gear.
I agree with Techno Dude here. Shunyata Sigma NR is a much better value.

Full disclosure: I never tried a Shunyata Sigma NR or Odin / Valhalla. I just know 😉🤭😂
@whitecamaross @ron17, @zprr and everyone else...

I have Tyr 2 XLR IC’s.
I am going to be making a speaker cable purchase, probably next month, and am 50/50 on going up to Valhalla 2’s rather than Tyr 2’s. For me at that price point, it’s a journey-ender as far as speaker cables go and I like that.

I’m quite happy with my Tyr 2’s btw. To me they have a harmonic ’rightness’ from top to bottom with excellent retrieval of low level details on both music and movies. I find them to be rich, detailed with an organic and natural sound. They do not filter or color the sound in almost any way and let me hear what my system is really doing.
I've never tried Odin, but I've had many powercords in my system to include Shunyat Sigmas , Audioquest Hurricanes,  Audioquest Dragons, and several others. I prefer Clarity Cables Vortex power cords over every power cord I've heard in my system. 
@ricred1
What qualities did this vortex cable add to your system that were easily heard that the dragon did not provide?
@chazzy.     
At the end of the day , it's really about what makes you sit and listen for hours on end. If the Tyr2 is doing this for you , that's awesome. Some of us can't find that happy medium because we keep thinking about what else is out there that could be better. Enjoy the hell out of that cable and make a move ONLY because you want to try something else , but always remember that this could also be a step backwards. It's not always a step ahead when you buy something new.