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!


jays_audio_lab

Showing 50 responses by techno_dude

Ref10 is toast. You just don’t need it anymore. Redondant tube stages. Less is more... less loss as you save 2 interconnect contacts.

I always knew that preamps were not needed anymore. Viber is of the same opinion. Preamps are old story. These are the times of dacs with output tube stage, and dacs with quality high gain ss class A variable output.

Sure, brands like ARC and cable retailers dont like this, but this is where the market is now going.
No review yet. I know why. Because WC is hesitating between Ref10 and Lampi.

Think about it guys. Which one to keep and which one to resale. Every word written will count and affect value of the one that is being put in classified. Would you buy a Ref10 if you knew you could replace it with a Lampi one box solution... I would not, I would get the Lampi to have dac + pre ... one less powercord and interconnect pair also !...

And now think about relations and fan club that swear by ARC preamplifiers... They are a pretty heavy beast to kick on the foot...


There is a thread on another forum that explains that the ARC Ref6 pre has a very cheap ( 15$) volume pot. A buyer has had reliability redondant troubles with it. He had to replaced the pot 2 times...
The offended lost no time to defend the overpriced ARC. Sure, most dacs and even costly prestigious ones have poor variable output stage. DcS and Ps Audio have both pretty basic digital atténuation.

But the best dacs have everything to omit the need for an additional preamp. APL DSD MR is one of them.
Sooner or later, it will be time to let go of the Ref10 and all extra cables attached to it ( which are just messing with signal integrity after all) . You might as well divorce from it now while it still has a very good resale value. Think future...you’ve just heard what the Lampi Pacific can do...and it’s still not broken in...and your still not using sota xlr cables...and you still haven’t upgraded tubes...

Ref 10 is toasted already. It should go where it had always belonged, in it’s double box ready to ship to a new owner.
At it’s msrp, the Ref10 should have included a sota dac module inside it from the moment ARC put it on market...

Other makers have done it...Hegel, Lyngdorf, Naim, Classe, etc.

Take for example the Mac C2600. Tubes, sota ( Wadia di322 based) dac module, and phono module included for 7k. Talk about value...
Like always, viber you are right on.

I would even go further. Most top end system owners I know have eliminated the preamp from the chain. The best dacs , like the Lampi Pacific, can drive sota amplifiers directly.

Same think with vinyl. The best dacs, like the tube based Lampi Pacific or APL DSD MR, can sound as organic and natural as turntables. Without the cons.


MF Titan seems a bargain at around 12k used. That if someone needs that much power. Most people won’t, and a more simple design bringing more purity will be the key to very good sound.
How is Musical Fidelity not a boutique brand ? There are quite a few reviews of the Titan online also.
A lower priced amp that beats the more expensive Block Audio monos.

I have a feeling we ´re going to read about synergy again......🤫 Let’s not offend anybody...
And, from what was described, the sound through the Ref10 is marginaly better than the Lampi direct to amp. Probably just a matter of coloration, and taste, that does not justify the additional 30k for 99% of people.

Lampi wins, ARC Ref10 owners please don’t make a seizure about it...

Fatality..
Ref10 is an audio dinosaur  🦕.. Old story in a new world were less is more.
As good as they are, for that price, they should have included dacs. Lazy ARC engineers, looking at the market from up there... 
Still, I would never buy nor a Ref6 nor a Ref10 , and it’s not that I can’t afford them. Mucho overpriced  for what they are. That being said, I would not hesitate to buy the Lampi Pacific dac with internal pre option. Much more value into that smart buy,  I don’t care if the ARC is 1% better on soundstage or tonal coloration...
Someone can get that same euphonic and large soundstage for a lot less than what ARC ask for it.

Someone will loose micro details adding it in any chain system, as opposed to a straight connection the Lampi Pacific offers.

A REF6 could be a nice buy at 8k street price , IF AND ONlY IF it had a sota dac module included... That would be great.
Knowing the Ref6 has had pot reliability problems, I would not touch it at retail price. Lazy and greedy engineers, a dac module should have been included. If McIntosh and Classe can do it, so can ARC. Talk about pushing the insult...
Oh yes viber, they finally saw the light.

We finally all agree that if the dac has enough gain to drive the amps, it can sound better than with an ARC pre in the chain.

And we also agree that with a nice Ref6 or Ref10 in the chain, someone can be sure to have enough gain to play anything ( plus additional inputs) And if the euphonics that it brings makes the owner happy plus the pride of ownership, so be it. Amen.
A lot of these shootouts between amps, should they be conducted blindly with same sound level and cables, would result in no clear winner most of the time. Not saying it all sound the same, sure some are a little clearer, larger, more dynamic, etc.

WC, my next move should be a change of speakers as they are the weak link in my rig right now. The dac will have to wait. ( my lastest move beiing the upgrade of the power cable on the Lux M900u to a Shunyata Alpha NR)
Guys, there seems to be a ´´woofy’´ seller in the classified who puts funny pics of his dog with sunglasses in a car. Sorry, I  could not stop laughing when I surfed the adds so I thought I’d share what I saw. 🙃
Well , WC, your Ref10 can now serve to finance something else on your ´´ to try’´ list. And will surely make a new happy owner somewhere.


Endgame move is obviously getting XLR outputs on the Pacific. All the gain someone would need, plus better sound as it should be by experience.

That should seal the Ref10 coffin once and for all.
That is a cool acquisition in the C2600. Mine is the solid state C47, the 2600 is said to be warmer and more euphonic..

That beeing said , the built in dac is what surprised me the most. It made me sell my 8k dedicated dac, and simplified my system. ( also, I upgraded the internal power supply fuse. ) The dac module is a miniatured  Wadia DI322 variant, using the famous ESS Sabre 9018 we see everywhere.

I am really looking foward to read you about it. Especially if you try the internal dac, usb wired. I think you will be impressed considering the low cost of this piece, but the Lampi Pacific should be better I concur. Don’t hesitate to boost the treble on the pre, or else it can sound a bit anemic on warm speakers.
WC, have you listened to the C2600 driving the Block Audio yet ?

In my setup, the only thing my 8k dac was better at than the inboard dac inside the pre was...bass. More bass and goes lower with the dedicated dac.

Aside from bass, I believe the midrange and highs of the included dac in the C47 can compete with pricer products,
@maguiar,

I own Verity Rienzi speakers , and drive them with a Luxman M900u. Superb results , no doubt.

The Otellos are supposed to be even better ! With the flagship Lux, you can go up the Verity line up to the Sarastro IIs. You won’t be limited by the amp. 
WC and Viber, amen to your words.

Now lets get back to buisness and plug that Mac C2600. May it compete  or plainly suck, I’ m freaking curious to learn about it ! 😁
Great WC. Bold and forward is pretty much how Sabre 9018 chip is known to be. I agree with your description, I also thought the same when I compared it to my 8k dac, the dedicated dac was smoother up top...almost truncated....I think it was the dsd filter that cuts the very top highs. It took me some time to adjust to the more forward sound of the Sabre dac in the Mac pre. In the end it matched my laid back polite speakers better.

I really enjoy that midrange boldness about it. It makes the instruments sound richer, my other dac was thinner sounding in the low mids.

Sure, it would be very interesting to know about how the flagship Ayre preamp compares. But , that Lampi will be very hard to detrone.


Nice review WC.

The vocals have less pop because you have to boost the treble , as Mac preamps are tuned to the darker side. I have to put around +5 to +7 treble depending of the music playing on my C47. Then the vocals and highs are waiking up. And the C2600 is said to be warmer than the C47 and C52...

The dac is very surprising for the money , isn’t it ? Can you eleborate as to how the Pacific is better than the C2600 used as dac and pre for both.
Shadorne,

My speakers are on the very polite side, and the Mac preamp is a bit dark and warm ( Mac house sound) So my speakers benefit from the treble tone control.

That being said, if I had Focal or B&W speakers ( wich are a bit tilt up in the highs) the tone controls would most probably be off. I believe that is why Mac gear pairs really well with those two speaker brands.
Shunyata for power cables. Nordost for speaker cables. 

This is the rule, my rule, and pretty sure it rules...
A little off topic.

I just finished cleaning all contacts of my system with 99% isopropyl alcool. A collegue strongly recommended doing it.

Hell, yes it does make a difference. I have gained clarity. Very recommended !! Don’t hesitate guys. Easy no cost tweak. 
A very good powercord. But Sigma NR is supposed to be much better. A guy on whats best has compared them , and he came to that obvious conclusion.
Sure , the Odin is very good. But you did not compare it directly to the Sigma NR on the dac because he NR you brought back from the shop are 20 amp IEC. You sre comparing ODin to WW on the dac, sure the WW will get spanked big time and your jaw will drop.

Try one Sigma NR or Alpha NR ON YOUR DAC , it could save you a lot.

We cannot know if Odin beats Sigma NR , if they were not plugged to the same piece of gear. Only then we will know.
I believe WC is experiencing his first top tier powercord ON HIS DAC. This is where they make the biggest difference, at the top of the system chain.

Yes, he can achieve that same performance ( on the dac) for less money. I already suggested a Shunyata NR, but if I remember right the one Sigma he tried couple weeks ago was a 20 Amp. female IEC that could not fit his Esoteric dac at the time.
Shunyata Sigma NR failed WC, because he had a crappy powercord on the dac while doing his tests. Bottlenecked big time by the first piece in the chain. Odin does wonders now , because it is plugged on the dac where everything starts. 

Please WC, just do the real test, Odin vs Sigma on the dac. We would all benefit from that huge matchup. Win or loose , we should learn a lot from that kind of test.
The real question is why does your dealer doesn’t want to let you borrow a single 15 A Shunyata Sigma to try on your dac...a top tier customer like you.

First logical answer to that question is...
to be able to sell  to a very deep pocket customer a 6 times more expensive Nordost Odin.

Second logical answer is...
your dealer does not want the readers to know that we can equal or best an Odin with a far less expensive Sigma. And you don’t want to offend that dealer in doing so.


That dealer who does not have a Sigma NR 15A in stock. Heck he must have an Alpha NR 15 A in stock, for you try home.

Music direct has a 60 day satisfaction guarantee.
I will send you my Alpha NR , if and only if you return  the Odin to your dealer so that you are not biased by a the fact you just purchased a much pricier powercord...
Audiolabyrinth,

Agreed, one can get the same performance as Odin for much less money.

Viber would say, Odin boost the high frequencies so that it’s waking up the rolled off Ref10 and Neoliths...

It is well known that Nordost is very fast , and a bit tilted up in the highs. They also cut a bit on lower midrange richness density. Articulate fast bass though.
Last post is thread pollution and full of hate.

Obviously, Viber or anybody does not deserve such treatment.
jetter, I am not a pro reviewer, just a dude who has seen a lot of audio gear pass in his living room.

ezzigi, agreed with that review, Nordost Valhalla or Odin for power cable NO ( much overpriced)

Shunyata for power cable YES. Nordost Valhalla 2 or Odin for speaker cables YES. Nordost top tier speaker cables are the best you can find. They are truly remarkable. Expensive yes, but the very best have a cost. Not their powercables though.
Agreed with Viber.

Let this thread go back on track, ( and the clowns go back to silence).

Now Odin 1 power cord is supposed to far inferior to Odin 2.

Much like the Valhalla 1 is much inferior to Valhalla 2...and yes I have heard both on the same system. It’s not even close, the older Noordost series suffers from lack of midrange richness and are prone to leanness. I know this, I have experienced this, it is a fact. I hope WC that you don’t need any grand jury written proof of this for it to be acceptable input to your thread... Remember , your thread would be nothingness without us the followers. We have faith in your honesty, please show to same to ours.


Well, maybe the new Parasound duo is better than their older line. Maybe you are just overestimating the overall difference the block audio amplifiers bring to the table compared to that new Parasound amp.

. DAC/preamp plays a good part of the final result you are earing. You could just bring your Lampi and Odin 1 and plug it in the Parasound amp at the show, and you would get a good part of what you have home....
 Neoliths sucks at most shows.

 Neoliths sucks at most dealers.

 Neotliths sucks at most W.A.F.

Niche market speakers for the very sophisticated buyer indeed...
Dealer or not, I also don’t get speakers you have to plug in the wall which signal  has to go through a lot of electronics. They will never be as transparent as a speaker with a sota minimalist crossover.
Interesting read WC and others, Nordost Odin 2 speaker cables 😋😋Wow a lucky guy you are WC !

Off the thread if if I may. I just bought a used mint pair of Dynaudio Special 40 to try. I could not resist as I got a good price, and always wanted to try a pair of these.

Fun little monitors. That 28 mm soft dome tweeter ( Esotar) is impressive. Smooth and resolute. ( it plays down to 1000 hz, strong neodymium magnet behind a 28 mm dome) I can say it is one on the best soft domes outhere, along with the Scanspeak ring dome one used on Wilson speakers.

I think Magico and B&W beryllium and diamond tweets are a bit better. But still, very impressive how engineers have come to make such good sounding  sota soft domes tweets these days !
Did I miss something.

Just an audio thread. Not the saint Bible. Just relax.
WC is reported being on heavy pills, for having realized the Oppo 205 sounds just as good as the best dacs he tried in his room...

😱