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

WC, Clear is these days far from the Cardas state-of-art.... You should really consider Cardas Clear Beyond XL for PCs, and Clear Beyond for analog ICs and speaker wires... Cardas Clear does remain the top digital IC instead.


G.


whitecamaross, you suggest to dump my MC601s. Before I bought my 601s I was auditioning the Pass Lab x600.8 and didn’t really like the sounds but lots of people swears by it. So I guess what I’m trying to say is, one system or in this case amp may sound excellent to someone but may Not sound good at all to others. I like to try and listen to different brands because all the reviews and comments of one person is strictly personal. I have been suggested by many people to try this and try that and so on and they swear that I would be happy with it, but how could that be, we all have different pair of ears, does this make sense? It’s kind of like cars, some like Ferrari and some like Lamborghini.
Whitecamaross,, Thankyou for your cable answer,  have you checked into making sure this 700cx has been at least  re-capped?, will make a substantial difference. 
Audiolabyrinth: it was recapped in 2015. 
Mike: I get your point and I was there until I realized how mid fi minctosh truly is. They compete with the Brystons, parasounds, Nad, rotel, anthem. They don’t compete with the audio research, luxman, Jeff Rowland’s, simaudio, esoteric, accuphase etc. But yet they are charging top dollar? Why ? Well their name has carried them this far. You have any idea how many dealers have offered me the 1.25kw? The 611s? Customers are trading them in due to their disappointment. 
That said, it’s your $ but I’ve been where you are. There’s a whooole Lot of stuff out there that will best those 601s and possibly for less. People fall in love with the lights and the cool look. That’s pretty much one of the biggest reasons why McIntosh exists. 
Whitecamaross...in your opinion ,is my krell duo 300 in the midfi category also or somewhere in between?

Thanks,your opinion is greatly appreciated!

Mike
whitecamaross,
Interesting as well as enlightening for me to read your last post to miketuason. The comments that you made regarding various brands being mid-fi as opposed to high end really woke me up in a way.
You (seem) to view brands as a vertical continuum, bad at the bottom, mediocre in the middle and excellent at the top. There is certainly some element of truth in that. Those brands (or individual models from a brand) may exhibit noise, audible distortion or truncated high or low frequencies. Those things are measurable and obviously undesirable. 
As time has gone by though, I think that I have come to view it in a more horizontal way; that is, separate but equal. You mention the inferiority of McIntosh to several other brands for instance, but inferior (my word) in what way? For you, it may be a perceived lack of resolution let's say, but that slight lack of resolution may be exactly what makes it easier to listen to for another person. 
I think that particular post finally made me consciously aware that every component, but let's say amplifiers in this case, has a blend of audible characteristics that may appeal to an individual, and there is really no way to say which is "better", only which you think is better, which of course listeners of similar taste may agree with.
Finally, I should disclose first that I am a McIntosh amp user; (among others) but having said that, I think that it is a narrow view to believe that Mac users purchase them solely for the meters or appearance. I think that most of us enjoy the appearance of our gear, but I don't believe that many of us buy gear based solely on its appearance. 
roxy54 - agree - amps certainly can be "separate but equal" and system matching is a main issue - including the room - in my experience.

In my case, I went up the Krell line in three stages some years ago - KAV 100, 250, and then to the flagship at the time, the FPB600 . The 600 made a big difference, compared to the KAV amps. It performed excellent, provided the conditions were right. I had flagship but heavy-driven Dynaudio Consequence speakers that could have used two 600s, but amp bridging was not possible, so I sold the whole system. Instead I invested in OTL tube amps, the Atma-Sphere MA-1. With the big Krell, I had to turn the volume too far up, to get the best (full class A) performance from the amp. With the OTL amps, the volume can be more moderate, and still catch most of the action. The Krell was more about "pushing" the music, while OTL is best at "pulling" you into the music.

I find that the MA-1s do exactly what I want, reproduce music in a true way, with full tonal colors, ambience, drive and speed, etc. Even if sometimes I miss the push of the Krell, e g in rock music, I don't think the MA-1s lose out on transients, speed and rythm - maybe the contrary, this is faster. An upgrade some years ago (for reasonable cost) helped with speed and bass.

There is something "star-lighted" and clear with OTL sound - at its best - in my experience. I bought the MA-1s without having the possibility to hear them, based on listening to a little OTL headphone amp, Audiotailor Jade. It was David against Goliath. Why did this little amp, in some important respects, perform better, clearer, more musical -. than the flagship Krell and Dynaudio main system?

The MA-1 amps create a huge, deep and well differentated musical landscape. Provided the source is reasonable good - and even a mobile phone mp3 does some of the trick - there is no doubt that the musicians creating the music are brought forth, more than usual, in hifi. Bad-sounding records don’t fare any better here, but the amps are not "analytic", most of recordings, bad and (especially) medium and good, sound better with the MA-1s than the former amps I have used. Beyond the Krell amps mentioned, this list includes a large Yamaha amp, and a 1970s Revox amp, plus various tube and solid state amps on loan.
Easy-driven speakers are a must, for going the OTL and tube amp way. I use Audiokinesis speakers, tuned to the amps. The system "grips" the room in a better way than the Krell / Dynaudio system managed. There, I used a Velodyne DD18 sub, but I could sell it, with the new system.
Just an add-on, further illustrating my point of amp and speaker matching. After giving up on improving the Krell / Dynaudio system, I sold the Dynaudio’s, and used the Krell for a period with easier-driven speakers, before I sold it. The speakers included the Aurum Cantus 3. I found that the sound was surprisingly good. It might seem that the "steel within a glove" philosophy of the 600 came more to its right than with the over-controlled Dynaudio Consequence speakers - developed using a 2 x 1200 watt amp. Thinking about this, I miss the Krell amp,  but I had to sell it to be able to buy a new system.
WhiteCamross,
Please Keep it up as this area will be my shopping list should I "HIT IT"Big.
Maybe reshuffle/edit the lead in  list to reflect your latest findings and determinations.
Danka
The video posted by WC a page or two back showed the ML being driven with McIintosh. I would think ML thinks enough about McIntosh to show off their speakers. Enjoy ! MrD.
a lot of McIntosh sensitivity here. I understand that. I was there until I decided to move up the ladder and that is when I realized  how behind McIntosh is. 
pass labs really demolished anything McIntosh I’ve owned. Then I left pass labs and ventured with luxman, and luxman killed pass labs. I tried the krell 402e with a ref10 and the simaudio 860a killed it with detail and smoothness. Then the luxman 900u had a battle with the 860a and ultimately I thought the luxman was the winner. Soon after, I met Rowland and well Rowland 925s came in and slammed the door. Yes, that’s a really small scenario of what happened here. im sure I left something out but this is just a Quick story. 
Sorry but McIntosh is mid-fi and I don’t see it going anywhere. Bryston is decent well built gear but you’re not exactly competing against what I mentioned above. 
If I had to choose between McIntosh or Bryston I’d choose McIntosh based on its ease to sell it and get your money out. McIntosh is the best brand to have your money in. Nothing moves faster than McIntosh gear. If they could only make something worth me keeping... 
Update: I have a great opportunity to purchase a pair of pass labs 160.8s with the matching xs preamp.... I’ve never heard that preamp but I want to. 
Well, that response from whitecamaross seems to verify what I was saying in my last post. Always talking about good, better, best without quantifying why that is other than you like it best. It's not a scientific way of going about things, but then it shouldn't be. This is about enjoyment. My point is that I don't think brands that you don't like can necessarily be classified as mid-fi simply because you don't prefer their sound signature. I owned a Pass 250.5 and really disliked it, but that was just my taste. 

McIntosh is MID-FI. People buy it for the name without even bothering to listen to other brands...OR they simply cant afford to go up the food chain.  Mcintosh is the Harley Davidson of Stereo Equipment.  Im surrounded by MC dealers and they pretty much confirm everything that the OP has stated. Great Re-sale value but WAAAAY behind the top dogs in quality/performance. When I first ventured into this world I went to a VERY Well known dealership in Delaware.  Of course at the time I thought MC was the best and the salesman did his best to steer me away from MC and get some Audio Research.  Basically they said "We have people like you come in here ALL the time with the predisposition that MC is the best...and that is far from the truth".  So I didnt listen cause I thought it was just a sales pitch and I went home with my MC Amp + Pre-Amp which where the Newest and "greatest" at the time.  What I eventually learned when I opened up my ears and my wallet was that I would never buy another piece of MC again after experience with Audio Research, D'agostino, Ayre etc.   Mcintosh is in the minor league for sure.

The new solid state preamp C52 is the beginning of a new story for McIntosh. It really can compete with the best pres out there.

I’ ve never tried their amps, but I sure the big stuff is not so far away from Pass and Simaudio. Luxman is another story.

  "The new solid state preamp C52 is the beginning of a new story for McIntosh. It really can compete with the best pres out there."

techno_dude,
That's impossible.The experts just told us that Mac is mid-fi.

"The experts just told us that Mac is mid-fi"

Sure is and it doesn't take an expert to hear it. The C52 is what I brought home that day and it cant touch the Ayre KXR-Twenty, REF 6 or 10, Shindo Pre's Ive had.  Im totally confident that Luxman, D'agostino, T+A, Pass Labs and many others would lay waste to it. The C52 IS good....for a Mcintosh pre which have always been held in low regard...except by MC Fan Boys of course. 2200+ Posts?? A person only learns from listening...not from talking (Typing). Maybe you should spend more time auditioning other brands gear and less time behind the keyboard. Just a thought.

jafant - It's been 13-14 years since I did any serious amplifier comparisons.  This was for the Sound Labs A1 speakers that I purchased back then.  The CAT JL2/JL3 amps got my attention because of their incredible dynamic contrasts.  The Atma Sphere amps had a little more of that lower mids lush sound, but I knew I could capture that back with tube rolling in the preamp, the Aesthetix Io and Calisto Signature phono/line stages. 

After I optimized this "preamp" with selective tubes to pair with the JL-3 amps to achieve a good balance of tonal coherency, 3D and resolution, I was loaned a CAT Ultimate preamp (loaded with Sovtek tubes) from a CAT dealer for a month.  Even with the various tube rolling efforts from a prized stash of Telefunken, Mullard and Amperex tubes with the Ultimate, I could not get the same result that drew me into the music like I had achieved with the Aesthetix.  There was no doubt that the CAT Ultimate had greater extension at the frequency extremes and greater clarity/detail on the top; the Ultimate was clearly the more neutral preamp....but I felt that it was just a bit too dimensionally flat for my taste.  Here was another example where the "synergy" of products from the same company did not work out.  

It has been a long time that I heard the CAT preamps, including the Legend which has been out for many years.  However, it is the CAT JL amps product line that has gotten unanimous praise over the years.

I will begin the effort to find a solid state amp to play magic with the Futuras that hopefully will get me away from running with so many tubes (16 power tubes per JL3).  And of course to determine how any given solid state amp performs with the A1's which I still have, but have since been upgraded to the latest back plates.  So we will see.

I had dinner with a couple of audio guru guys two nights ago, and one of them said, "once we get to a level of 'top-level components', it's fairly easy to achieve resolution, but it is not at all easy to achieve the 3D in the musical performance; it takes much more effort of room tuning, component matching and to find those few components that can truly pull this off." I could not have agreed more.

And now back to our regularly scheduled program, McIntosh Bashing.

McIntosh has those intoxicating blue lights. People are drawn to those lights like bugs are to street light. Probably the BEST resale values in the market.

I have owned a few pieces and currently have the MA 252 as my office rig. It’s a cool looking piece and it sounds good.  It's more a novelty though.

Having owned several Accuphase and Luxman pieces as well as Ayre and now Gryphon, I can say from personal experience that McIntosh is definitely not at the level of the gear I mentioned.
I agree with Jafox! I'm still trying to get it so I get a solid 3d image which goes right around. I still remember had it once listening to Rebecca Pidgeons's Spanish Harlem with Newform ribbons with special crossover with Conrad-johnson tube gear with Ocos speaker cables & Mit interconnects. My friend got it with Wadia 861 and Cat pre & power with Avalon Edilon. Wireworld cables. Most I can get 3d ethereal. Has a lot to do with room acoustic & positioning & of course speakers.
Ayre and Audio Research premps are overpriced big time for what they are. Luxman C-900u spank their big gun pres , for half the $.

If Mac was really mid fi, it absolutely would not have the resale value it has...
riaa,
While I like some Mac pieces, I'm actually not a "fanboy". Three years ago, I bought a used MC 452 and didn't like the way that it worked with my system. I used the money I sold it for to buy a 300b am that I still have. I also have a vintage Mac that use occasionally.
My point with whitcamaross was not to defend Mac, but to question the reasons that we dub a brand "mid-fi", and also to question what the actual meaning of that term is. Is it inferior performance, or just performance that its not to the listener's taste?
As far as your snarky comment is concerned, I have heard plenty of gear in my time.
i just listed my luxman 590x integrated. Grab it before it’s gone!! There is none available at this time. 

Much Thanks! jafox

I concur that Aesthetix is excellent gear. I have not had an opportunity to demo Atma Sphere nor CAT.  Happy Listening!

Ok guys,
i want your gut feeling on this:
luxman 900u Monos/900u preamp
versus 

ref10/krell 700cx

What do you think will sound better with my Sasha 2s? 

I will say I didn’t like pass labs 350.8 with ref 10 and my speakers... too warm sounding and I using silver 7 cables which suppose to make the highs brighter...

give me your thoughts 
Interesting guys. I have a gut feeling that the krell 700cx won’t have the level of refinement of the 900u. I just feel like the older amps had graininess or harshness or just not the same level of resolution. I remember trying the 402e with my ref6 and it was ok but it wasn’t like wow omg. The ref10 and simaudio was spectacular though but not with Wilsons. It was jaw dropping with the salon 2s I owned. 
I have  owned the 700cx, and have fond memories about it. That said, I would shy away from models that old. Technology adavances faster than ever, and in this hobby we can’t expect that our gear stay on top of the game as many years as earlier. I now own the Luxman M/C900u, and I would never go back to a 700cx. That would be a downgrade, IMHO.
@ nebob, that would depend on how you use a 700cx,  I  have $46,000.00 in just 3 cable's on the 700cx,  I assure you that there is no Luxman in existence that Will come close,  not only that,  my 700cx is modified to today's technology,  btw, I get my Luxman L-509X today!, I can get audio when most cannot get it,  connection's!
Well the 700cx will be a great experiment for sure. I plan on using the ref10 with it. 
I couldn’t spend 46k on cables to be honest. I’d be sleeping with the dog outside. Thr ref 10 will be used with the luxman 900u Monos later today and see what happens.  

Hello WCSS, like you, my bet is on Luxman.... Krell+Ref10 is likely to outperform Luxman in sheer muscularity.... Luxman is more likely to yield a more nuanced experience.


G.


Hey audiolabyrinth your Tara cables are good but a dealer will sell them at 50% off retail b/c they pay even less! Yes I've been offered them but they did not impress.
So I just connected the ref10 to my luxman Monos. This is my preliminary feeling:

huge massive outrageous, all the way to the parking lot size soundstage. 
More relaxed sounding but almost too laid back. 
has all the ingredients but I feel it could be a synergy thing with my Wilsons and ref10. They just don’t seem to get along. I can probably use a bright amplifier at this time in order to throw more highs. It seems as if the sound opens up to the sides but doesn’t come at you. 

Even 50% off a pair of ICs and speaker cables at $46k would not be something I would ever be able to justify, much less brag about.

The OP has written,

huge massive outrageous, all the way to the parking lot size soundstage.
More relaxed sounding but almost too laid back.
has all the ingredients but I feel it could be a synergy thing with my Wilsons and ref10. They just don’t seem to get along. I can probably use a bright amplifier at this time in order to throw more highs.

Or perhaps look for a radio Shack graphical equalizer on ebay!  JUST KIDDING!

I know that ARC made a big change to their house sound at the turn of the century.  The pre-2000 or so top ARC preamps were always a very bold projection out into the room with great dynamics rather than being more focused at and behind the speakers like the Counterpoint, BAT, Aesthetix and Aria that I have owned since my ARC days in the 80s/90s.  But even now, it's hard for me to imagine any ARC preamp as being mellow, especially "too mellow".  And clearly in all the systems I have heard with Wilsons, including those at audio shows with ARC electronics, the result was never mellow.  So I highly doubt there is a "synergy" issue between these two. 

It seems as if the sound opens up to the sides but doesn’t come at you.

Your observation is a dimensionality problem and not a tonality problem.  Throwing a "bright" amplifier into the mix will not likely "solve" your concern here and will likely cause listener fatigue rather quickly. 

I would like to offer you an opportunity to try something besides a preamp, amp or speaker change.  I have a 4-feet XLR Silent Source Reference IC that is just sitting on the sidelines because my current DAC only has single-ended outputs and all my current amps only have single-ended inputs.  This cable company is only one of 3 that I have tried in the last 15 years, between a preamp and amp, that brings on a system's 3D ability AND does not botch up the tonal coherency or detail capability of that system.  Ultimately I will want this back as it will almost certainly be used when I go with an external phono stage or update the DAC to the next level in the coming years.  But for now, you can play with this IC pair, for weeks or months, and I suspect this could very well change some of your observations.  It shouldn't cost more than $25 or so to send these each way.  Please let me know if you're interested.

John

Send me a note with your address to my account here and I can get the cables out tomorrow.  It's actually 5 feet long (1.5m) and very flexible so things won't need to be so tight.
Luxman in the house!, I  will post impression's on the Tara Lab's thread,  so some of you can talk there with me,  btw, had some audiophile's over with the Luxman last night,  opened the box,  we all looked at each other when we saw the stock power cord,  then they looked at me,  they all said, naaa!, laughed hard,  so we installed the Tara Lab's cobalt power cord $5,500.00 retail price on the Luxman L-509X integrated amplifier,  this worked very good,  whitecamaross,  did you use the stock power cord on your Luxman L-509X integrated amplifier? 
No, I used wireworld silver 7. 
That said, I just got done testing a very expensive power cord from a well know brand and I smell snake oil... my wireworld silver 7 powercord smoked it. This was using it with the ref10 which has now settled on my shelves indicating it’s staying. 
I have VERY VERY interesting feedback in regards to the Luxman 900u preamp versus ref10. I will post it when I have time this weekend. 
audiolabyrinth and WC..i would imagine you guys are using a 30amp dedicated?

i mean ..the expensive power cables.you know?
Whitecamaross, Thankyou for your response, I am also using the furutech gtx-Rhodium duplex receptacle on a 20 amp single pole breaker on a dedicated line  for the Luxman L-509X, sublime!
Mikepaul, The 30 amp single pole breaker is needed on the beast amplifier krell 700cx,  you only need a 15 to 20 amp single pole breaker on the Luxman L-509X integrated amplifier 🤓😀😎☺
I Will have an electrician come out to do be 30a outlet.  What’s a good price to do this job ? How do I know of an electrician did indeed do a 30a ? Is there a way to test it ? 
Yes the integrated is amazing. I told everyone but you are always going to have some doubters. 
The diablo is probably going to be leaving my stable. After spending time with the luxman and now the ref10, I still prefer the luxman sound. It’s not a knock against the diablo.