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!


whitecamaross

Showing 50 responses by grey9hound

I actually owned the Lampizator Big 6 not the 7 .. sorry .
Anyway it has been 4 or 5 years ago.
I remember it was very 3D , had the "midrange Magic" but also had very Good bass and it was fairly transparent. It sounded very real with Zero hardness or Grain. It had the realness of tubes.
I know that i changed several of the tubes to NOS tubes , but i do not remember which they were. I know one i changed to was a 6F8G, which is one of my favorite tubes, especially in the place of 6SN7. I remember that i had a National Union (coke bottle )Rectifier Tube .
I just remember the soundstage depth and height being about the best that i have heard as well as it being very very soulful.
I don’t know about anyone else , but me , I GOTTA have bass.
I have switched my amps from the Mc30 (had great deep bass) to the Granite Audio 865SR Mono Block Tube amps , which have even better deep layered Bass.
I am using some Raytheon 6F8G in the V1 spot and the Sylvania Vt-231 From The 1940s with two hole black ladder plates in the V2 For the V3 and V4 are a Pair of Shuguang treasure KT-88Z and the Recticifer is Jan Cetron 5R4-WGB.
.The Sylvanias are Holographic with great mids and Resolution, but i have to Have the Raytheon in V1 to give me Killer layers and Layers of bass.
The best Bass that i have had from any Tube amps.These are my favorite tube amps , by far.
It is too bad that they would not work on WCSS speakers. But if you ever decided to try some high efficiency speakers, Tube amps is the way to go IMO
I also have asked in the past for WCSS demo list and got ZERO response. I am not sure why, unless he just uses one Dire Straits album or song ?.
Seems that this would be good info to have so that we could try the same stuff on our own system .. ????
I also sent him a bunch of "Demo" Cds , but never heard back which, if any sounded good or worked good for demoing on his system. 
oh BTW I forgot to mention that i replaced all of the coupling caps in each of the 864SR amps with Jupiter Copper Foil Paper in Wax caps ..... Outstanding .
I did this on the recommendation of Grannyring (Bill Dion ) ..BTW
That’s funny. You are asking ME why I got rid of something.. when you change equipment more often than your underwear .. LOL. I Needed Money.
You asked for that one .
But tube amps are really where it is , with highly efficient speakers .. Really .
Tube amps have that special . clean clear smooth , you are there , that solid state just can’t do .
WCSS do you remember the sound of the Mac tube amps . The Presence and Intimacy that solid state just cannot match ? Or........ did you forget already ?
For the REF 10 ,I thought the power supply tubes were the  6550 . One for each channel ..Correct ?Then it is 10 of the 6H30p (Russian tubes) Which is what was in my Lampi Big 6 BTW (i remember that number now . It used 2 and a 6F8G). I was not real tube knowledgeable at the time.

Really Techno_rude ?
It is Polish
Written in 2006 from their website is below :

Lampizator - from Polish "Lampa" meaning the vacuum tube (or a valve) - lampizator is "the one who makes things tubed".
The man, in this context - it’s me.
Or a device converting CD players to "tubed type". In this context - the output amplification device.
Lampizator is the most talked-about item in the hi-fi circles after the rise and fall of SACD ! ;-)

Lampizator is serious equipment
I think people can’t take you seriously either. You can’t even spell it right...LOL
Wow .
 Both the speakers and the amps are HUGE!!
 You have all hard surfaces .You look like you need some rugs, carpet, or some soft things in your room.I bet the reflections are horrendous.
For someone who owns Mega buck equipment you would think they would know to ...... Well ..............never mind !
WCSS ...So you mean the winged C 6550 was in there , not kt88s? ?
What is stock 6550 .....which brand and model # please ?
@jonaiken ..WOW that is a lot of money for tubes
Don't say that too loudly or too often. You'll have the price of the RCA 12BH7 going through the roof
He can’t make money on those Viber. He has to buy them cheap and sell for a profit or he won’t do it .
It is really what it is all about for him. If you look at all of the recommendations that he is not interested in , it is obvious. That is why he doesn’t know what tubes he has in his REF10 .It is also why he won’t give us a Demo song-list.. It is all about the money and the profit, not really the product.
WCSS, I am not being bitter, I am just calling it like i see it .
There have been many great used products or recommendations by many people , that you pass on. I am just saying that you pass because you can't turn a profit . From what I have seen , if you can't come out making money ,you won' but it . I am not bitter. i wasn't referring to any particular equipment that Viber6 mentioned . They were several .Yes, you have every right to do what you want. just like i have the right to state my opinion. 
I never said it was wrong or that I had a problem with it .. ..... Absolutely nothing wrong with what he is doing.
@jetter ,
It is not clear to us casual readers what has given you the idea that anyone cares what you think about WC one way or the other
.
I do not think posting my opinions is any different than you or anyone else who posts in the forum. What makes you so sure anyone cares about yours, or anyone else’s, for that matter. Everyone is entitled to an opinion. 99% of posts in this forum are opinions, including yours. I did not ask you to like mine Nor
did I ask anyone what they thought about my opinion....did I ?
Plus I never said that WCSS was in the wrong in any way ...Did I?
C’Mon now .Let’s put your Big Boy pants on and take off the pullup’s .

@jetter
"appear to say anything to share WCSS spotlight"
When your contribution doesn’t get you enough attention you get downright nasty,

Come one . really? If you read my posts , you know that is not true. What post are you referring to that my contribution doesn’t get enough attention ?
I only threw Vibers name in because he recommended and has in the past recommended, several amps ,all of which WCSS is not interested in , for the reasons I Stated before.
Lets stop this bickering.
I said what i said , just deal with it . I can’t help it you feel that I hurt your feelings or WCSS. He can defend himself. I do not think he really needs you to defend him. We are all grown ups here ... right .
I said WCSS won’t buy anything he cannot make money on.
He has every right to do so .
End of Story

@jetter 
If you perceive it as negative interpretations ... so be it .Happy New Year to all..
My comments were not intended to be negative , because there is nothing wrong with it. I will say that I have gotten several private messages agreeing with me.
It seems that the logic that I pointed out , is coming across . I’ll leave it at that .
This happens to be a Public Thread WCSS. Surely you know this .You do not own it. Because of this you invited the PUBLIC Because of this it is not your house or your food , even though you may think so. I think you are being a little Almighty.
You started the thread knowing that people will and do express their feelings and opinions.

I was only responding to everyone’s else criticism of me and defending what i said .It is others who can’t move on. I agree... lets forget about it ! Let it go !
Uh, Viber6.
 IT IS THE MID-RANGE...that gives the soundstage more than anything.
.See below :
RE:TREBLE
(1)FORWARD- if applied to treble, is very similar to bright; both describe too much treble. A forward treble, however, also tends to be dry, lacking space and air around it. Many of the terms listed above have virtually identical meanings. Hard, brittle, and metallic all describe an unpleasant treble characteristic that reminds one of metal being struck. In fact, the unique harmonic structure created from the impact of metal on metal is very similar to the distortion introduced by a solid-state power amplifier when it is asked to play louder than it is capable of playing.

(2)GOOD TREBLE-The following terms, listed in order of increasing magnitude, describe good treble performance: smooth, sweet, soft, silky, gentle, liquid, and lush. When the treble becomes overly smooth, we say it is romantic, rolled-off, or syrupy. A treble described as "smooth, sweet, and silky" is being complimented; "rolled-off and syrupy" suggests that the component goes too far in treble smoothness, and is therefore colored. A rolled-off and syrupy treble may be blessed relief after hearing bright, hard, and grainy treble, but it isn’t musically satisfying in the long run. Such a presentation tends to become bland, uninvolving, slow, thick, closed-in, and lacking detail. All these terms describe the effects of a treble presentation that errs too far on the side of smoothness..
RE:MID-RANGE
(1) MID-RANGE- Too much mid-range energy can make the presentation seem forward and "in your face." A broad dip in the mid-range response (too little mid-range energy over a wide frequency span) can give an impression of greater distance between you and the presentation.
This info is from :
Guide to High-Performance Audio Systems by Robert Harley , Editor-in-Chief of The Absolute Sound magazine.
Glad you liked it WCSS. I think it is spot on, from my experience.
To me Tubes are the closest to the real think . Tubes are NOT rolled off. Tubes sound more real to me than anything, at least with the music that I listen to which is mostly Jazz, Blues, Funk,Electronica, and Lounge.
To me, there is just something artificial and not natural about Solid State  IMO You especially notice this after you have owned or heard tubes.
WCSS, I would love to send to you these Granite Audio 864SR Mono amps that I have with the Nos Tubes and the Jupiter Copper Foil coupling caps , but I know they will not work on your current speakers.
If you happen to get something that is in the 92db and above efficiency range, they would work. So , if that happens ,I can get them to you for a listen.
Take a look here at this website . It is Star sound Technologies.
Robert Macks is the owner.
I use their Sistrum Apprentice platforms under the Double Impact speakers , and I also use their Sonoran Desert Plateau speaker cables with great success.
http://starsoundtechnologies.com/Products.php

I would think that some Bass Trap Absorption type of foam in the corners behind the speakers at the top near the ceiling , and also the same place at the opposite side of the room , would be the quickest and easiest improvement to your room. That rug can’t hurt ! hear is some cheap ones.
https://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Daps&field-keywords=bass+traps

I like these below for cheap

https://www.amazon.com/SODIAL-Corner-Acoustic-Absorption-121224cm/dp/B07CKHZDXT/ref=sr_1_34?s=musical-instruments&ie=UTF8&qid=1546262079&sr=1-34&keywords=bass+traps


In case you did not know , it (Lamm M1.2) is a Hybrid monoblock power amplifier with solid-state input stage, a tubed driver stage(6922), and a MOSFET output stage.

I do not know if it is the best amp that i have ever heard , but it is my favorite. That would be the McIntosh MC30 mono blocks re-done by Yves Beauvais.
The tube compliments for each amp are Two 12AX7s, One 12AU7, One 12BH7, two 6L6GC output tubes and a 5U4GB rectifier.
With the right NOS Tubes in there it is amazing
Wit the following tubes for the pair of amps , it is hard to beat IMO
V1=12AX7---A matched pair of Telefunken from west Germany.
V2=12AU7 --A matched pair of RCA Clear Tops
V3=12BH7A --A matched pair of RCA
V4=12AX7 --A matched pair of Amperex
Rectifier pair = National Union 5U4GB
Output tubes Quad = GE 6L6GC from the 1960s with O Getter
These amps are very open yet resolving .,with a great 3D soundstage
The Deep Bass Articulation is unreal for 30 watt amps.,but, you need highly efficient speakers.
I think that my favorite output tube is the 6L6GC. (very even and detailed with great bass )
Guess who else said the 6L6GC is their favorite............Roger Modjeski

Yves Beauvais . by Stereophile
Sorry .I just had to share this .
It is a long read , but ,VERY interesting,IMO, to say the least.
https://www.stereophile.com/content/yves-beauvais

@thezaks
I agree with you 100 %
Just like when people say that it (a pre-amp or amp) isn’t true to the source .
How do you know what the source sounds like .
You had to hear it through some component. Unless you were there in the studio when it was recorde ... you do NOT know , and even then, the recorded sound is what the Engineer wanted . That does not make it uncolored.
Unless you use the same equipment that the recording studio used , then you do not know what the source sounded like, but once again, that only makes it what the Engineer wanted or envisioned (which might be true to the source)... not necessarily uncolored.

@WCSS
It will.....It will. !!!!!..It will take time to break in .You MUST be patient ... PLEASE .
I am Damned excited that you actually are getting something that I would love to own and I HAVE owned .....well kinda...I had .the BIG 6 .
Besides the Czechs, (Block Audio) are right next door to Poland
( Lukasz Fikus of Lampizator).They should play nice together :)
I am going to go out on a limb and say that it will be similar to the ARC REF10,... in that it will be Damned hard to let go of .
Patience on Break In. Patience
If you want me to break it in for you, send it to me . I’ll take 2 weeks off of work and play with it the entire time. It already comes with some of the best tubes money can buy ( KRON KR45, or PX-4 ) SO.. i doubt very seriously that you would need to tube roll.
It also comes with Mundorf silver /gold solder and copper metal foil output or coupling caps (probably the Jupiter copper foil Paper and wax...THE BEST), which are same caps that I have put in my Granite Audio 864SR.
HELL YES !!! 

You will be happiest with the Lampizator Pacific IMHO.
The following is from a review at audiostream.com. It compares the Pacific  to the Audio Note 5,and because they are both non-upsampling and zero feedback designs, I personally think they  give us  the most natural sound.

 . Like the Audio Note DAC 5 Special I also have in review, the Pacific makes you forget completely about the fact that it is reproducing the recorded event and unconsciously allows one to be utterly engaged in the music playing. Coincidence? Probably not and I’ll tell you why I think that. Both units utilize zero-feedback, zero upsampling and zero oversampling DAC architecture. While the DAC 5 Special maxes out at 18/96 (by design), the Pacific can handle PCM conversion of up to 24/192 files via SPDIF and up to 705kHz DXD/512 DSD via USB and PCM 32/356 via LAN, so the high-resolution crowd is covered.
Read more at https://www.audiostream.com/content/lampizator-pacific-dac-preview#xVtItFE2qooEFYq6.99
@ricred1
I think everyone knows THAT , by know (component in your own system ) , but more often than not , you usually do NOT get a huge mismatch ..... that is just ... no good .
Most highly rated components don’t necessarily "Fall on Their Face".
It is pretty unusual to have something that is a mismatch or major disappointment, at this level.
It is still about a component being better or worse (in your own system), but you make it sound as if it could be a Total Dud .
Unfortunately everyone has their own beliefs. and their own setup..
Better or worse than what .. BTW?
I guess you just can’t take the pressure of everyone thinking that it is about a specific component being better or worse .
It IS ALL subjective . I guess if you can’t take that , and have to leave Audiogon, then you might need counseling , to understand why ... ?
I see that the Rectifier Tube is a 5U4G, but do you know what Tubes the other 2 are ?
Looks Great. BTW , I thought you might "Go for the Gold" :)
Okay, sorry to keep asking , but , what tube type if you know , about the other 2. I see 3 of them .One is the Rectifier Tube .It is 5U4G (in the front) what are the other 2 tubes ? Do they have a number on the ?.I think there was many different tube options when you order a Pacific. I was wanting to know which ones in this one .It just makes a difference if i know the tube model number like 300B , cause i know what a lot of them "sound like " so to speak.

Bass traps for the corners ,and with the rug..that should be about what you want.
I think with the right cables, the Lampizator Pacific could be as good as the Ref10.
I will just say that Wireworld cables would not be MY choice. 
How much of that soundstage has to do with the Lampizator ? 
Have you been using the REF 10 or running from the Lampi without REF 10 ?

Viber,
It might be all about sparkle and snap.... for you. Too much can be fatiguing.
But, just because you like that doesn’t make it what everyone else likes or wants.. nor does it make it more accurate ,.......... cause we know.. that will be your response... Sigh.
If you were to use Purist Audio Dominus Interconnects from Lampi without the REF10 , I would be willing to bet that you will get what you are missing. The most Musical interconnect that I have ever used. Gives body and weight with textured bass and very good top end and perfect midrange with 3d soundstage. You can crank the Fu@k out of it without glare Very quite background. Things leap out from the Darkness
jonaiken , I do not disagree.
Purist Audio Dominus Cable is awesome in every way