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
Viber So far I prefer the last video Of the Maggie’s  to all the others ever since the Mephisto was introduced. 
With the DAC direct all Gryphon cables and the Mephisto and the Maggie’s  this is the Best I have heard since the Mephisto was introduced. The vocals were rich, natural and full bodied with a big sound. Dynamics were good As far as I could tell given that song.  However I not that familiar with that piece of music Q&A Fink
Whoa! Didn’t care for the ML 13a bass. I want quality over quantity. Give me 20.7 over the 13a so far, even though the 20.7 don’t have enough bass. Probably room correction will help 13a, let’s hope.

Sorry for the negative initial impression. But then again even on Alexia 2 initially I thought bass too much. But you got that corrected.

Even on tonality I’m going with 20.7 so far. Of course with usual caveats of only listening through headphone system, blah blah blah

Both wildly inferior to DAW or Alexia 2 virtually across the board, IMO. But fun experiments. Will be more interesting after you get the 13a dialed in.
Agreed 100%. However you can’t run those without room correction. The woofers are powered and must have room correction to blend with the panel. I expect you’ll see an improvement but probably not enough. 
I am shocked at how mediocre the present ML 13A is, compared to the 20.7 and Alexia 2.  On Q&A-Fink, the opening voice is muddy and too bass heavy.  Maybe this is due to lack of room correction for the woofers, I don't know.  The fundamental freq of the male voice in this piece varies from about 140-300 Hz, so that's woofer territory on the ML 13A.  Higher in freq, the midrange and HF are better, but are still colored and congested by comparison to the 20.7 and Alexia 2.  The bass badness spreads into higher freq.

The 13A's HF which should be immune from the shenanigans of the bass and room correction, are still rolled off compared to the other speakers.  This gets me back to my long standing criticism of curved stat panels.  HF are rolled off from the sides of the curved panels, because of the radiation patterns from large diaphragms, which is also true of cardioid microphones.  The straight ribbon tweeter of the 20.7 doesn't exhibit HF rolloff off axis, and the flat midrange/bass panels of the 20.7 are also a correct design.  The excellent tweeter of the Alexia also shows superior HF response and dispersion to the curved 13A HF. 

Let's see what happens to the 13A when you fiddle with the room correction.  Move the whole speaker further away from all walls to decrease the congestion and mud.  Toe in so the midpoint of the panel faces you, which will lessen some HF rolloff.  Still, I doubt the bass will approach the quality of the bass in the Alexia 2.  The Alexia 2's bass is excellent in both quality and quantity, and is balanced with the rest of that speaker.
Viber,
i have the speakers set up properly. Also, you dont point the panel directly at you with electrostatics like you do with Maggies. Who told you to do this??? you use a flashlight to get them toed in properly. Right now, they are almost 4 feet away from the side walls and nearly 8 feet away from the wall behind them. They are FAR AWAY from any wall.
Anyhow, this is the first round, and this is why i am now making sure i do captions stating WHAT I HAVE NOT DONE such as the room correction.
Lastly, are you BY ANY CHANCE, reading the youtube comments that others leave behind? Not for nothing, but you are preeeeeetttyyy much the only person who has been THIS CRITICAL/HARSH of them which makes me question WHAT IN THE WORLD are you listening to in your home?
The vast majority of the comments on YOUTUBE have been positive so i am now starting to wonder what are you using to listen to these videos....
I understand they are way cheaper but still those here who claim they are better. 
Hey guys, remember all the times you asked me to start my own thread. Well wish full filled , there is a new one in the miscellaneous section that was just started ...not by me ... but by Mr. Decibel.

It’s mostly talking about WC asking money in private messages to users for advice as an audio CONSULTANT. It’s just more evidence being added to what has simply been just more obvious lately.

Remember, caution to all readers, take this thread’s reviews with an even bigger grain of salt from now on...
yawn....
i won't get started here once again....  
i am having a kick @ss time reading the non-sense, but cool i gotta worry about ME and those who i am helping along the way. I will not cross the line with abrasiveness anymore, but i will report personal insults. I will let the admins do what they are paid to do instead of getting me all worked up.
Let me focus on the things that matter and i will not argue anymore. I am done with the fighting and the immaturity. I got more important things to do and i will leave it at that. Haters will always coexist near anyone who is trying to do better in life. FACT. 
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Oh well, now he is giving orders to readers. Free thread ? Nothing to hide ?

Yeah sure, the other thread has been deleted.
I always thought that a truthful thread with truthful intentions would never have any chance to come to  this... An OP giving orders to users, wow , never seen that on many forums. He really thinks he owns HIS part of audiogon.
What’s the name of that Beatles song ? Oh it’s
 “All the lonely people “ or is it “jealous people “? I don’t remember.
WC,
Curved stat panels are problematic so no matter how much or little you toe them in, you get loss of information from midrange up, and especially in HF.  Flat panels like Maggies are better designed.  It is a shame that the potentially greater clarity due to tighter control of the diaphragm by the electrostatic sandwich compared to planar designs is handicapped by a curved design.

I don't care what designers of curved panels like ML say about optimum setup.  Their priority is to have several listeners at once experience the sound.  My answer to that is that everyone hears similar compromised sound, whereas a single listener to the Maggie or other flat panel speaker will get the best possible sound.  A listener should have the abiiity to get the best sound, then move on and let another get into the sweet spot and enjoy it.  Even with Wilsons or most dynamic speakers, there is a sweet spot for the best sound, although it is larger than with planar speakers so that several people can enjoy close to the best possible sound with the dynamic speaker.

Many people don't like hybrid stat/dynamic driver designs which are trying to marry totally different driver technologies.  Maybe I am being too harsh on the relatively cheap 13A, because its woofer and cabinet probably will never approach the performance of the better design of the bass in Wilsons.  But I'll keep an open mind to see how the room correction works out.  It is remarkable that the 20.7 is far superior to the 13A at their price point, and competes effectively with the Alexia 2, bettering it in some ways but not in other ways.

Don't compare me to the average commenter on youtube.  You know of my expertise by now.  Please respect that, as well as my detailed analysis of your setups, which are intended not as negativity but to be as helpful and objective as my knowledge and experience allow.  At the same time, I respect your experience, appreciate and enjoy all your videos, and I try to expand your knowledge base which will pay off in your consulting business. 

Lastly, after unbiased comparisons made possible by your videos, I have finally come to respect the performance of the Wilsons, and I praised you for that.
viber6,
I appreciate your use of WC’s comments to arrive at logical conclusions. You have good intentions in your recommendations. However, just to make you aware of something that has been previously mentioned, you sometimes make statements that come across as commands.

"Move the whole speaker further away from all walls to decrease the congestion and mud. Toe in so the midpoint of the panel faces you, which will lessen some HF rolloff. "

Perhaps re-word these types of sentences so that they come across as suggestions, instead of commands. You’re smart, so I’m sure you can understand how this can appear to be commands, even though you don’t intend for them to be commands.

Dave
@viber6, A speaker that should be on your radar is the Sanders electrostatic hybrid. A flat full range panel crossing over below 200Hz to a sealed box 10" woofer, electronic xover standard and must be bi-amped. Tremendous clarity/transparency and to my ears the best integrated cone woofer to stat panel, they are stunning and I spend at least 45 minutes in Roger's room at shows because his system using 2 of his amps is so natural and real sounding as well as emotional involving, a very under appreciated design, IMHO.
Interesting klh. I heard them at axpona 2019 but I think the music being played didn't help me understand the speaker better. That's sometimes the issue with shows. 
Jay, I'm lucky enough to get some input into what songs get played so I'm familiar with the music. They don't have a wide sweet spot as you figured out when you saw the seating in the room, 4 chairs in a single file all directly in the center, but WOW are they exciting. From 180Hz up a full range stat and a fantastic coherent (ML could learn from Roger) perfectly blended woofer that allows this system startling dynamics and a see-through transparency that spins my propeller. At least I'm consistent because my GTA 2.5s share many properties with the Sanders both physically and sonically.
Viber you make a valid point about the curve panel. I’ve heard both and the flat panels are always superior in the sweet spot. More focus better every thing because now you listen to the whole panel directly instead of just a sliver. Even big Electrostat companies Like Sound Lab have started to decrease the Amount of the curve. I believe that initially one of the main complaints about electrostats is the head in a vice affect and people used to entertain in the home with music. Now is has become more of a solo “sport”. So if you are a solo listener then the flat panel is perfect for that. Curved panel have a sweet spot that is wider but not near as sweet as the flat panel giving it ALL to you. The old quad 57, In my opinion, is a flat panel and in many ways is still one of the best electrostats. That basic technology has yet to have many major advances. They have made them giant to get better bass and dynamics however What it does well it did well back then and still does today.  I will always have both types of speakers just for Change and the fun of it. 
carey1110,
Agree totally.  Just a few years ago at a NY show, I heard Robyatt's Quad 57's.  These Quads still have THE best midrange purity and lack of coloration of anything I have heard.  The HF are rolled off compared to the Maggie ribbon tweeter, or my Audiostatic 240.  I have thought about getting a used pair of restored Quads from Wayne Picquet's Quads Unlimited.  I could use my Enigmacoustics Sopranino tweeter on top.  The main problem is that these Quads are not protected from excessive power, so they are readily damaged.

Subsequent Quads like the 63, 788, 789 and later models are far inferior to the original 57.  They are very veiled, although they are smooth.  Big deal--who cares about smooth veils?  Many conventional box speakers are superior to these Quads for clarity.

I have a concept for the ideal electrostatic design.  Instead of convex curvature toward the listener, make it concave in both vertical and horizontal dimensions.  (I like the vertical concave time aligned design of the Wilson Chronosonic for this reason.)  If you want to sit 8 feet away, imagine a sphere with a radius of 8 feet.  Cut a frame from this sphere, like a round melon slice, maybe 2 feet wide and 6 feet tall.  In this way, all parts of the panel radiate equidistantly directly to the listener with perfect time alignment--no toe in required!  There are 2 problems with my concept.  First, the listener's head is really stuck in a vise with no tolerance for error if you want the best possible sound.  Second, if you want to sit 10 feet away, or some other distance, there would need to be a multiple hinge system that would decrease the curvature for a 10 foot radius compared to 8, etc.  Take the Sound Lab small cells and curve them concave in a hinge that is adjustable.  My Audiostatics have some features of this design.  The 2 identical panels are hinged, so you can aim each straight panel to your head.  I tried this, and was able to get more bass and output, but there was a sacrifice in precise imaging and purity, so I listen to only 1 panel which is full range but rolled off in bass.  I opt for midrange/HF purity at the expense of bass, which suits most music I like.
klh007,
Yes, I have followed the work of Roger Sanders.  Initially, he designed curved stat panels, but then realized that flat panels are better, so his designs have been flat for many years.  He has an informative white paper on this subject.  I heard a model 10 years ago in a home.  I was impressed, but it wasn't quite as good as my Audiostatic 240.  Certainly he has done a great job with the dynamic woofer and its own amp.  Further back, I thought his Innersound flat panels were relatively mediocre.  More recently, at a NY show, a model was in a tiny room and it was mediocre, possibly because of the room.  I was disappointed.  
thezaks,
Technically you are right.  I could say, "I suggest,,,,"  At the other extreme, I didn't say, "You should... or "You must..."  So I left it in the middle,  "Move the speaker, etc."  In manuals, the instructions are neutrally written, like "connect..." or "rotate..."  It is understood that they are not commandments.  Sometimes they say, "Please.." but they don't start every sentence with "please," because it would get cumbersome.
It comes across as you think you know more than WC about gear.  Nobody on this thread except you believes you know more about gear than WC, regardless of how many times you have fiddled in the restroom.
@klh007
thank you for the feedback above. I will try to go and listen to them next time shows become available.

It has been quite an interesting comparison i must say between the logans and the Magnepan. They are both so different in many ways, but the reality is that it comes down to a few things:

  1. how big is your room?
  2. do you listen to music alone or with a other people?
  3. is the WAF important to you?
  4. how much money do you want to spend on amplification?
  5. how loud do you go?
  6. what music selection is your preference?
i believe answering those questions will easily identify the speaker you should go for between the Magnepan & Martin Logan.
Saying that one is garbage over the other is really a personal opinion from some of you. If the logan is "rolled off" as some claim it to be, well then guess what? this allows you to play far more music (good and bad) than the other speaker. I will try to articulate my thoughts above a bit more during a future video. For now, saying that "purity" is really all that matters (which i have heard from some of you here) is in my opinion incorrect. how so? well, tubes are not "pure sounding" so does that make tube gear garbage because they are rolled off or not pure enough? I personally do not think so. I have ZERO issues with tubes and i really enjoy the flavor they inject into the music.
Some days i hate my solid state gear and wish i had tubes in the mix, but then i realize it is just the mood that i am in. Our mood weighs HEAVILY on how we listen and i believe i have spoken to some of you about the "mental game" associated with keeping equipment for far too long. What would this be? well, in a nutshell it has to do with our brain and ears getting used to the same type of sound over the long haul and then we end up enjoying things less and less. It is a fact that this occurs to us all. How can i prove this? very easily, stop listening to your system for 1-2 weeks and then go back to listening and watch how impressed you will be.
Audio is no different when it comes to the feeling that you slowly begin to "get used" to the sound. I know some of you own 2 pairs of speakers for this reason. You never get bored because you can change the sound anytime  you want. 
Do you have any idea how many people have told me they want to change their amp or preamp or speakers etc and i have asked "why?" and their answer was " i want to try something different". That is a perfect example of just boredom and the long term effects of owning the same components for too long. HOWEVER, this varies by individual so i will not say EVERYONE behaves this way, but most people do. 

Kren0006. Careful We are all limited to some extent in our knowledge of this hobby and to assume nobody knows more or less Is pointless. Viber May in fact know more about some things that WC. Let’s understand that our knowledge of each other is limited. All I know about Viber is that he is a musician and I value his perspective even if it’s different than mine. He’s familiar with what live music sounds like. I think WC would tell you the same thing. WC does have a lot of gear in his place so he does have a broad perspective in some regards but everyone doesn’t have the same goals and WC knows this.  Just saying be open to others opinions and you never know what you might learn something new.
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WC,
I see your points.  But one thing about "pure", natural and smooth speakers like the 20.7 is that there is less irritation from irregularities in the sound, so all cables and amps with enough power can be enjoyed on the 20.7.  Although you have demonstrated that the 20.7 and the comparable 3.7i sound better with better electronics and cables, the 20.7 may not be as critical as the Alexia 2.  That doesn't mean the 20.7 has less resolution than the Alexia 2--it just means that the 20.7 is enjoyable with more ancillary components than the Alexia 2.  To Magnepan's credit, they don't recommend any particular amp to go with their top speakers, and say that their many owners are happy with amps at all levels of price and quality.

Flawed analogy again--a beautiful woman will look that way no matter whether she wears rags or elegant outfits.
Ok so i am clear on Viber’s thoughts of the Martin Logan 13a based on the video i posted. That said, what does everyone else think about the initial presentation of the 13a? i am curious as to what you all heard?
i want to see how similar your thoughts might or might not be to mine? 
Let me get you all’s feedback!
Totally open. Viber has posted probably hundreds or thousands of posts in this thread. Pretty good understanding of what he knows or doesn’t know - hell he tells us three ways til Sunday every other week, the same damn thing over and over. I’ll just say his posts speak for themselves, and leave it at that.

IMO, WC knows much more about gear than Viber. That’s my opinion. I suppose I did say "nobody here thinks," so in fairness I will retract that. Good point.
I just think it’s best if we give our opinions on the gear not each other. But that is Just my opinion 
So I did enjoy the 13a speakers. Very open and airy with a please sound. Lean compared to the 20.7s and the bass very disjointed in comparison. Didn’t have the rich solid tonal characteristics of the Maggie’s. But for the money they did pretty good. I liked the weight of instruments with Maggie’s better but it’s a larger speaker and sounds that way. Logan might be a little cleaner in the upper frequencies
I don't have a dog in this race.  But the Martin Logan's sounded very muddy in the bass region, and there was something timbrally "off" in the midrange/upper-midrange, making it sound unnatural.
I really don’t get the point of bringing back the Martin Logan 13A when WC has already tried a pair of Neoliths and 15A. The more this thread goes, the less it makes sense. Maybe it’s the product of the month his dealer relation has to sell ? Who knows.
I would take it in private with WC, but I heard he asks monetary compensation for it, so I won’t. 🙄
It just an opinion on the the existing video. If you have any thoughts on the sound feel free to share. 
Given (assuming) those MLs are new, plus the various items not properly run in yet—they (in the video) sounded quite promising.
Ime*. stats need time to loosen, relax and settle. May sound tight/lean/pinched during early stages. Also thought they best be driven by high power tube amps to properly bloom. Playing with power cords will also improve things—ie cone/stats coherency and give denser upper. *(CLS, CLSII, Monolith, Prodigy)

However, in agreement with some of posts above re advantages Magnepan has over ML.. most notably in coherency and richer timbre, I traded my Prodigy for MG20.1 then.

Bvdiman;  do powercords really make a difference in these. I have a pair of the old CLS 2s in the closest but I never had anything but the stock PCs on them. 
I'll expand more.  Just my opinion, and not claiming to be expert (far from it).

I thought 13A bass was not only overwhelming but also sloppy.  Not tight at all.  Loose and boomy.  Assuming room correction can fix.

I didn't think the midrange and highs were great either.  Preferred Maggies.  Thought clarity much better there.  Granted the Maggies are more settled in.

I also don't care which of these two wins.  But I think it'll be fun.
@carey1110 
Yes, with the ML hybrid cone/stats models..

Never tried them on CLSs though as had them early ‘80s and (as far as I remember) no good aftermarket power cords were available yet then.

But thinking back now, that they too would certainly benefit from one. Wow you still got them? Worthwhile trying then..🍻


Yes I had new panels put in and every now and then I pull them out just for fun. Still like them 
I have a pair of CLS in the attic too, with a set of extra panels new in the box as backup. My first good speaker, i bought it new in 1986.
Power cords or power conditioning never made a difference on that speaker, the AC only powers the stat panel. On the newer hybrids the AC powers the internal amplifier and active crossover, power cables make more of a difference.
Agreed with kren0006 , the Martin Logan 13A have sloppy bass that can’t keep up with the speed of the panels.
kren0006,
I am delighted to say that I agree with everything you just said about the 20.7 vs 13A.  It is interesting that since you love deep bass a lot more than I do, we both came to the same conclusion that the bass in the 13A without room correction was overblown and out of control.  You favor quality bass over quantity of bass, and I totally agree with that.  I am looking forward to the room correction for the 13A, and I suspect that will make it a nice sounding speaker in the entire range.

Actually I love natural live, unamplified bass such as the string bass.  It has fundamentals down to about 30 Hz, and a skilled player can bring out harmonics as high as about 10 kHz.  The bow scraping and plucking  of the strings produce the high harmonics.  Although my electrostatic panels produce little bass below 60 Hz, my speaker's accurate reproduction of harmonics in the mid and upper bass and higher freq produce a very convincing likeness of the whole instrument.  My mind can fill in the missing deep bass, so I don't need to shake the walls to get bass satisfaction.  
well, tubes are not "pure sounding" so does that make tube gear garbage because they are rolled off or not pure enough? I personally do not think so. I have ZERO issues with tubes and i really enjoy the flavor they inject into the music.
I totally disagree that tubes are not Pure Sounding.
To me most Tubes sound more "REAL" than transistors. Some Tubes tubes are rolled off, but not all. I own and have used NOS Telefunken 12AX7 (Diamond Logo etched in bottom of glass) smooth plates, and they are anything But rolled off. They are Fantastic.
I agree with you WCSS. I enjoy Tubes