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 40 responses by grey9hound

But,
We will never know. Deep discounts are not offered on Purist Audio cables and WC will only by at Deeply discounted prices for the reasons that I  stated earlier. That says it all when he won’t try other cables
@jafox
Sure there are more detailed cables than the Dominus , but there comes a point where too much is TOO MUCH.
If you can’t turn it up loud (Reference levels )and listen for extended periods before it becomes too fatiguing, then to me it ,is too much to take.
Sure it is very impressive to have Huge detail, but it gets fatiguing very quickly.I’ll take Musical over hyper detail all day. .To each his own.

Viber6 ... Take Note
You said you like to hear upfront .. Live... presentation.
Reference level loudness would be just that. It is not un-natural. Now you seem to be talking out of both sides of your mouth. I did not and do not say that you HAve to turn it up loud . I said it CAN be turned up loud and give a "LIVE" presentation... without fatigue. Still sounds great at medium levels. Of course everything is system dependent
Viber6
You are just wrong.... period .
I never said that Ii like to crank my music  That is not the way I listen . Well .. maybe occasionally.  I said that you CAN with the Purist Audio Dominus cable ... without fatigue.. My electronics are NOT rolled off.
Please stop telling people how their system and equipment sounds , when you haven’t heard their system or equipment.
Also can you explain what better spec tubes means .They all have a set of voltages and currents that they operate within.Some may operate towards one end of the spec or toward the middle . some offer lower gain .. at the expense of higher plate current .. etc. Way too many operating parameters for a vacuum tube . i guess it depends on what you want from the tube. Lower Microphonics is always preferred . Is this what you mean ?
jafox .
I agree wholeheartedly . I could play it loud because it was Awesome Sounding .. just as you stated..It had nothing to do with anything lacking. . . There are very few cables that can play at those levels,with the clarity coherence and tonal balance of the Dominus. It is the quietest cable that I have ever used ....Oh and BTW, It... hands down... has   the most detailed and textured bass from any cable that I have ever heard.
That is why I said that the Dominus cable is my all time favorite .
It is very impressive.
WC,
We never really knew which cables were used in which positions during this testing . We did get that the Platinum 8 were used with the Lampizator when being used as a pre-amp, but other than that we don’t know the speaker cables or what was feeding the Lampi (source and cable) When the REf10 was in the loop , which cables out of the Lampi, into REF10, then which cables to the amps from the Ref 10 ? Analog in and analog out on the REF10. that is 2 sets of cables just into and out of the Ref 10.... right ?
You have a lot of  variables due to cabling requirements....., unless i missed something.
@WCSS



whitecamaross OP1,386 posts01-10-2019 9:56pmSo right now, I went back to the block audios and they sound great but they don’t seem to wow me as the titan fidelity was doing earlier today. However, they have been unplugged for over a day and I remember when I first got them I wasn’t impressed. I became impressed until the next day. They sounded totally different so tomorrow night might be a great showdown as well as Saturday. Both amps will be fully warm Saturday afternoon before the shoot out. I want both to at least be idling for a full day. The preamp and dac will be on 3 hours before the shootout begins. My buddies will jot down their impressions on paper and each person will listen alone without anyone else in the room so that nobody is biased. Once each person listens to about 3 songs through each amp (their own selection) then the next person will go inside and do the same until we are all done. I will then collect their notes and see what each person decided and their opinion on the amplifiers. I will be sure to post what each one of them wrote down on paper.
.

....any notes taken by anybody .
How did you keep score ? .
..Still no songlists...curious
I am curious as to some of their adjectives used to describe things .
Any pics of the dudes with their jaws hitting the floor ? I am a little surprised that everyone was in agreement on what they liked . That is curious.. look at your first sentence in the above quote.
BUT........Of course, the Block Audio amps......have to win... they cost more ...Right
WC,
Better tubes for the Lampi will fix that..like several here have recommended.
The right tubes can give the Lampi Pacific a more relaxed presentation.
Don't forget.the Caps in there (Jupiter copper foil) take about 300 hours to fully break in.  
Viber,
Your opinions are .. just that.
Some of us like extended listening sessions .
That requires the presentation to NOT be "in your face"
It can still have all of the treble and not be "in your face"
I know that you have a hard time with it , but "in your face " gets old quick.. It is impressive.. at first... BUT , not for the long haul. Of course ,that is my opinion.but, I tend to think that I am not alone.
It sounds like WC is in the same camp.
That why i said before ...To Each his own.
no... i said that because you said that if it is laid back sound , it is rolled off.(treble) That is why. You said it about treble ... not me. I say it is not.
Viber6
I have to agree with Jafox. you come off as almighty... like you know everything and everyone should listen to you because you know it all. It is you who is being disrespectful with your Almightyness
You do not have the experience of most of the equipment that you talk about and comment on . Most people here know better than try to talk about equipment they haven’t heard. You go as far as trying to say that A is better than B.. even though you have never heard either. Above in your post you even try to tell WC where the distortion will come on the volume .
Also, the optimum position of the volume control for the highest needed volume is near wide open, for purity and fine gradations of volume options. If an additional preamp’s gain at your max volume is mid position, you are getting a little more distortion
WTF
Thanks bill_k.
I have yet to hear a Sigma Delta DAC that I liked better than an R-2R ladder circuitry DAC, but, then again, I have not heard the Pacific :)
Viber6
Spouting off at every opportunity as you do  does not earn respect.
You think you must comment on everything as if you know everything. .That is why you come off as a Pompus now it all. Your opinion is better served on equipment that you have heard or used. You try to tell people what is better than the other based on what others say, .This is not VALUABLE or wanted by others.
Almarg and Bill_k are respected here because they do not spout of in the same manner as you. The people on thread have spoken, but, once again , you are too Pompus and Almighty to understand or be able to accept that.
Viber6
I said that you can get different tubes to give a more relaxed presentation. I did not have any in mind because I do not know which different tubes it can use .. I am not familiar with and have not used any 300B or equivalents
But as far as 5U4G. I think my big 6 used that rectifier and I remember that I preferred the Mullard brown base Coke Bottle shape CV378
Viber ,
A 300B has specific operating parameters (SPECS)... all the same regardless of manufacturer. It is usually an operating range of for example ...plate voltage , plate current .etc. It is the same for a 12AX7 etc, really any tube #. The tube number is the design and is usually developed by one company initially . Then other companies also manufacture it as time goes on. The different designs and implementations of them from the various manufacturers to achieve a tube within those specs, is what makes them sound different .
Alright WC,
I really think you will be surprised at the MX160 and especially Lyngdorf Room Correction.
just remember to start MIc position #1 in the main seat spot ,at ear level , with the mic pointing right at the center towards the speakers not up in the air .
If you need help lmk
lets do the MX160 with Lyngdorf Room correction or RoomPerfect first Please
Of course , I have the MX151... Very similar
Room Perfect Tips:

1) Do not measure the front third of the room

2) Except for Focus Position measurements (which are pointed horizontally toward the front soundstage at each listening position), do NOT point the mic at any speaker during room measurements

3) Try to keep the mic at least three or four feet away from any speaker when measuring

4) Keep the mic at least two feet away from any surface.

5) Vary your measurements - walls (upper/lower), ceiling, floor, large furniture

I know this link is for the MX151, but lots of good stuff here .MX160 is Very similar
Page 1 reading is more than enough to get the gist of RoomPerfect and MX options and choices for settings.
https://www.avsforum.com/forum/86-ultra-hi-end-ht-gear-20-000/1479699-official-mcintosh-labs-mx-151-mx150-owner-s-thread.html

I have tried several Dacs with the Sabre ESS 9018 ,and never liked any of them. ....Very forward, in your  face, Hot upper mids,  presentation .
Definitely not to my liking. 
Lampi does not have a Sabre Chip to my knowledge.
From what I now Lampi Pacific  is R-2R ladder technology DAC, as i believe all of the Lampizator DACs are.
IMO they are the best sounding ... R-2R Dacs
WC,
I am glad that you have tried other cords . I think that you will be surprised . Well actually , I see that you are surprised. I am glad that you have delved into this.
But, If you crank things up, does it Run you out of the room after 5 minutes ...????
Sometimes hyper detail can become TOO much .
@grannyring.
Boy , I missed that one , but then again , so did the experts.. LOL
I wish I still had my Purist Audio Dominus Fluid XLR interconnects and Dominus Fluid Power cord , but unfortunately, I do not .or I would send them for WC to try .
The Dominus is a blend of Copper ,Silver and Gold. .
The Nordost Odin interconnect is 24 copper Ribbons,(each 20 gauge) with silver plating.
I am betting that the Odin sound a lot like the Verastarr Grand Illusion.
which were very detailed ,big soundstage , up close presentation , but lacked bass IMO.... maybe the Odins have the bass.. ??? That would be my main concern with them.
WC ,
You did not actually go to the show..right?
Is it your Dealer who is giving you the feedback that the Neoliths sounded terrible ?
Keep in mind , he wants to sell you expensive gear so he can make a lot of money. I am not saying they didn’t sound bad , but keep that in mind.
Do you think he would tell you that the Parasound Audio gear sounded Great with the Neoliths, and you do not really need those Block Audio Amps ?
I am just sayin’
Sim Audio 860A or was it the 870A .. not near the top 4?
Are these the top 4 amps with Neoliths or just top 4 amps for 2018
You could try a pair of the Sim Audio 880M :)
Zero Feedback Design at 800 Watts into 8 ohms and it doubles to 1600 Watts into 4 ohms
I have the Oppo 203 and use its HDMI input . The Oppo 203 has 2 HDMI outs (same as the 205). One is dedicated to Audio only The other does both . I run the Audio only HDMI out(of the 203) to the MX151 the other HDMI out (of the 203) goes to a 70 inch 4K Sony TV.. I also use a 4K HDMI switch ahead of the 203 .This way i can input (Dish ,Roku Ultra,JRiver Media Center etc) All are HDMI out of the Source to the switch , HDMI out of the switch to the HDMI in of the Oppo 203 (Oppo is set to Bitstream).
I am also running a digital coaxial out of the Oppo 203 to the digital Coaxial input on my McCormack DAC-1 Deluxe. I am using the Analog out of the McCormack DAC-1 into one of the Analog inputs on the MX151. This gives me a lot of choices for sound .,especially since the MX151 will only allow analog inputs in order to play different sources in Zone A and Zone B .. like ..at the pool outside . Zone B is the pool for me I can use either the MX151 DAC or the McCormack DAC-1 Deluxe DAC.
Is that as clear as mud ?.
I still have not yet tried the DAC  of the Oppo 203 or Analog outs.
WC
Do you still have plans to try the MX160 with RoomPerfect ?
I think it would help your room and speaker placement a whole bunch 
The day and time i posted that , the  thread kept showing the last post was page 120 or 121 and the dates and posts were from 2016.... ??
I will say that my Oppo 203 playing Pandora plus Through roku ultimate is very engaging . All of my devices are hard wired to the ethernet. If i compare the JRiver Media center PC playing .wav files that i have ripped from cd, i actually kind of prefer the Oppo 203s sound . Now both of these are being bitstreamed to the MX151 through Purist Audio HDMI. My Mx151 is doing the Digital to Analog .What i do notice is that the Oppo 203 is more lit up sounding, or forward. This is good at low to medium volumes. If i turn up really loud it can sound a little too overdone .. so to speak . Whereas if and when i crank up the JRiver to loud volumes , it is not as overbearing .
Whether this actually means anything or not, i do not know . It's just an observation on the Oppo 203 vs JRiver PC