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,

Tidal vs QOBUZ - you bet, would love to see how your system can distinguish the differences.

 

Dave

Jay,

I like the 2:42 guitar/drum/HF percussion recording you played 5/23 at 9:16 AM.  Nice clear upfront sound.  I hope you use this for your speaker A/B between S7 and Focal.

@thezaks 

I think we all respect Jay's path. But I also think it would be good if others shared their opinion on the use of this thread; Jay of course is the one in charge, so whether he changes or stays the course is up to him. And I stand with those that are wishing him continued and increasing success. He works hard and it is apparent, I like go-getters like Jay. We need more like him in this world, realizing that success is not given but earned.

@pokey77 

I totally agree with you about the thread - I hope it continues to have value.  I also agree with kren0006 - respecting WC's path and wishing him the best of success.  

Dave

Best mid-bass, deep bass, etc - you name it (in my room)

If anyone came into my room and heard the impact of this speaker, I’d have to shut your jaw. Could this be my favorite Magico? Time will answer this question, but make no mistake this speaker needs POWER. This leads me to my next point: why do manufacturers build big amps with huge power? Well, this speaker answers that question.

It should go without saying that being able to afford this speaker doesn't mean you are good to go. Make sure you have your ducks in a row when it comes to your electronics. 

If you expect to climb mountain Everest wearing flip flops, sweat pants and a sweat shirt because you don't want to spend the money in the proper gear to suit up, you should stay away from the S7. 

 

This is gonna sound really dumb and unconvincing but I was actually gonna predict a Magico. Over weekend WC said he wouldn’t be revealing til late in week so I thought I had some time. Oh well, I always support earlier reveals.

I’ll say that the one thing that was giving me pause was the claim of best bass. Didn’t think a cheaper but still non ported Magico would beat the M models, let alone some of the others he’s had.

I am definitely much more of a forum person than YT, but respect WC’s chosen path and wish him success

Jay,

It would be helpful to do a video of the same song on both speakers using whatever electronics you want.  Ideally, use the same ancillary components so we are doing a fair comparison of speakers, but the speaker differences will be greater than the electronics differences.  I think I like the new S7, but the music has been unfamiliar so I have no opinion so far.  In general, bass porting increases the quantity and extension of bass, but it is less accurate than sealed boxes.  The S7 needs 3 drivers to get the bass quantity of the 2 drivers with porting in the Focal, but it makes sense that accuracy of bass is better in the S7.

I remember your S5 from a few years ago.  You didn't like it because its sound field was too small for you, but I liked its clarity or tonal balance better than the M3 and M6.  I could be wrong, because it was all an apples/oranges comparison over a long time.

Great presentation on that video. Well clipped and summarized. 

Sounds like a speaker capable of shining especially w great supporting cast.

Best bass to date.  Wow.  That says a lot given what has come before it.

Wonder how much the 3060 and the Extreme etc factor into the evolution.

I’m waiting for those who hide in the bushes to come out and begin to dismantle Mágico 😂

Only kidding... I am however, waiting to hear from you all about the speaker I unveiled today. 

@thezaks 

OK, got it. I appreciate the clarity, no pun intended.

I hope that the value of this thread is not dwindling. I see it as the foundation of Jay's Audio Lab and it is a great place to discuss the videos he makes, hope you hear/read this Jay @jays_audio_lab.

BTW, I think this thread ebbs and flows. Seems sometimes there's just a post or two a day, then all of a sudden, there's many posts, often brought on by the videos over on YT that stimulate the conversation.

@pokey77 

Yes, I knew and have used that - thanks though.  I wasn't trying to get kren0006's attention in that moment, just pointing out to WC that folks might be dropping off due to his comments about the value of this thread going forward.

Dave

@thezaks 

 

If you want to get someone's attention, you can post their user name using this format @kren0006, and they will get a notification and they can then choose to respond or not to. Works good when you quote someone too. I apologize if you already knew this.

 

BTW, @jays_audio_lab, great Meet My New Speaker! video.

WC,

Where did kren0006 and his fairly accurate guessing of equipment go?   You've been indicating that you will be more about YT and less about this thread, so maybe he decided to drop off?  

"Apparently nobody else cared  gave theirs on here."   Maybe folks are dropping off from this thread, based upon what you've been saying.  Not sure.  

Dave

Sounds great on my I-Mac.  I can only imagine how great they sound in real life!

Holy hand grenades Batman, it’s not just the footers that are in place…. It’s the whole enchilada!  POW!  Knocked me right out of my socks!!!

Really sounds great…

klh007 and jafant,

Yes, the 4th movement of Peer Gynt Suite 1 is the Mountain King.  For harmonic beauty, listen to the 1st and 2nd movements.

After you're done impressing your friends with sonic spectaculars, turn to chamber music.  Search YT for Grieg violin/piano sonata, op 45, recording by Fritz Kreisler, violinist and Rachmaninoff, pianist.  It is remarkable how much passion/intensity/beauty there is in this 1928 recording.  (Sorry it is not posting here--fault of YT).  In particular, listen at 10:07, 17:28, 21:25 for the utmost in tonal beauty from Kreisler, one of the very top violinists who ever lived.

Next best is the 1949 recording of Leonid Kogan.  But the recordings of modern violinists are mediocre--they have lost the art of romanticism, so who cares about the superior audio quality.

Thank you for the feedback back.  Apparently nobody else cared  gave theirs on here. Here's mine so far:

  1. Eye ball rattling tight bass 
  2. Football field sized soundstage
  3. Electrostatic-like definition
  4. HARD AS HELL TO DRIVE 
  5. Does not tolerate cheap electronics
  6. Not "plug and play" like focal Maestro Utopia EVO

Folks

What's your initial impression?

Hi @jays_audio_lab ,

I must say I've been following your YT channel since the beginning, listening to all your changes through my main living room 2 channel only w/TV rig. Thank you for sharing your journey via this thread & your channel, so educational! This is the very 1st time I heard something really special come through,  (takes 1, 2 &3), the emotion, artistry, musicality of the performances and coherence of all your gear in front is now coming through! This is definitely next level up. I found myself moving my head, body & feet to the music and replaying those videos more than once.. Such a superb music making rig! Can't wait to find out what your new speakers are, I think this is the best yet that music has come through from your channel.. Including when you used your iphone to record lol.

Folks: 

Today I have a special guest in my room and we plan to do a Livestream in the afternoon. We are thinking somewhere between 2-4pm ET. Stay tuned for details. This will be a great opportunity to ask questions! 

viber6

 

Thank you for the follow up.  I will check out selections on YouTube.

 

Happy Listening!

@viber6, Is the Grieg Peer Gynt Suite no. 1, 4th track also known as In the Hall of the Mountain King? I have the Berlin and San Diego versions.

Jay,

That Grieg Peer Gynt Suite no. 1, 4th track is full tilt dynamics in the last minute, with a big wallop at the end.  At the beginning, keep the volume low, otherwise you will blow out your woofer again.  A piece like this has MUCH more dynamic range than you are used to.  A proper level is 30 dB in the beginning, rising to sustained 90-100 dB in the last minute, with maybe 120 dB peak at the very end.

jafant,

There are so many recordings of the Grieg Piano Concerto, because everyone loves to perform it.  Just listen on YT which is good enough to make a selection based on sound and performance.  If you like more subtle Grieg, I love The Last Spring, Holberg Suite, the 3 violin/piano sonatas, especially the popular no.3, op. 45.  The string quartet is big scale romantic.  My favorite recording of that is by the Guarneri Quartet from 1965.  The sound is too mellow RCA, but the performance is  of utmost beauty.

Guys, all the music i play is found on my tidal playlist which I’ve shared with you all in the past. Please, save this playlist and refer to this when you are trying to figure out what song is playing.

 

Search for "Jay’s Audio Lab" on tidal to locate my playlist

 

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viber6

 

Which CD or SACD pressing for Grieg Piano Concerto ? Label? Catalog number ?

 

Happy Listening!

jays_audio_lab

 

what Grieg piece did you guys play?  

 

Happy Listening!

Jay,

I'm glad you met this older gentleman who introduced you to the music of Grieg.  Which piece did he play?  Grieg is a very popular classical composer, although his music is at the height of the romantic, rather than classical period.  His melodies speak to the heart, and they are not complicated or hard to grasp.  I recommend the Piano Concerto, which starts with a highly dynamic piano flourish from high to low notes, and back again and again.  The 2nd movement is a soft string mood piece.  The whole piece has lots of macro and micro dynamics, and is great for system testing. 

Another great piece is the Peer Gynt suite no. 1.  Another exciting piece with every sonic treat you could want.

The advantage of classical music recordings is that most of them are natural, without any processing, except for some mixing of spot mikes on certain instruments, for balance and intelligent emphasis only.  The intent is to have the recording reflect the experience in the concert hall.  You will want to have the most detailed electronics like Boulder bring out all the beauty in the details.  There will be nothing unpleasant so there is no need for euphonic electronics to throw out the baby with the bathwater.

Even the cheaper Boulder components are dedicated to neutrality, so the $20 something grand 1160 will bring out more detail than the euphonic more expensive stuff from Constellation, D'ag, etc.  

@zprr 

 

"But I appreciate Jay keeping an eye on this thread still and posting." I agree. This is the anchor/foundation for Jay and is a great place for discussion on all things two channel. This thread is not just a bunch of videos, it is the story book of Jays Audio Lab.

Man, I think a few folks have already mentioned - this is a primarily a two channel thread for over 5 year now going on 6. Many folks Ron17 and Zaks to name 2 have been really helpful already.

I absolutely wish you the best on your multi channel journey, but meanwhile Jay is pushing the envelope and expanding his sphere of influence in two channel, system setup and of course his youtube presence. It seems like your inquiry would be best suited for a private consult with Jay should he accept at this point. Or perhaps start new multi channel inquiry on Agon to tap the full knowledge base on this forum that may not follow this particular thread.

We still have some momentum here, albeit waning. We are losing regular contributors seemingly left and right. All the while, there is so much excitement, agitation and change happening whether on this forum, wbf, axpona, munich or future aspiring youtubers, all of which jay is talking about and could tilt the trajectory of future hi-end audio. Let’s keep the conversation going here on Jay’s journey and I still hold out the hope that this long thread doesn’t fizzle out and dry up, but I understand that could be its ultimate future. Ha, in denial. But I appreciate Jay keeping an eye on this thread still and posting. Especially as Mikey can opine for himself on other forums like WBF, whereas Jay cannot, for no reason that has ever been publicly articulated. Forums still matter in our sliver of universe.

@abizzle55 I only know of two multi-channel amps that can mute channels. The California Audio Labs design, a 20 year old amp, still is the most advanced one I have used.. It had bias tracking before bias tracking transistors existed. It had ability the ability to control with RS232 or command from the processor when it switched from class A to Class A/B. 

One of the reasons I bought the Krell was because of the webpage and the options to mute the channels. It also can notify Krell and you if there are malfunctions with the amplifier. I was tried of "dumb" amplifiers. 

I find that when you run all of the channels the sound is sort of diffuse and lacks the clarity of a two channel amp. You can still hear the sound quality of the amplifier but it just can not match the clarity and detail of a two channel amp. With the Chorus, when I mute the channels, all of the diffuse sound goes away.  I am guessing the extra channels add noise. I believe most multichannel amps measure worse with all of the channels running at same time.

I would assume this is true of the Chorus 7200, that you can get better stereo with muted channels, but I do not have any first hand experience with the amp. They may be wired the same as the 5200 or may not be. With the Chorus 5200 there are I think two transforms. It may be wired so that with the channels are muted, the stereo channels are on one transformer and the other three channels are on the other transformer. That's the way the California Audio Labs was wired. With the Chorus 7200, you may have three channel on one transformer and four on the other transformer. I do not know but if that is the case,  you would always have three channels on a single transformer. You might not get the same effect as the Chorus 5200 if it has only two channels on one transformer with the others muted.

Yes, I agree. If Wilson doesn't sound that good, no one would bring those pairs of old-fashioned-looking robots to their home lol. It might be worth discussing the pricing strategy of the loudspeakers companies. What are the differences between a $10000, $30000, $50000, and $100000 pair of speakers? The same goes for the amps, preamps, and DACs. Just some interesting topics people may be interested in.

@logydoghan 

I have not compared them directly so I can only go by memory. Anyone who is dismissing Focal Maestros for Wilson Alexia is probably not in their right mind. 

You all know I like Wilson, but Focal Maestro EVO has completely blown me away on all counts: Clarity, detail, huge soundstage, deep bass and looks. 

My wife continues to say that FOCAL is the most gorgeous speaker I have had in here (she is a graphic designer) and actually 3 of her friends echoed the same thing. Europeans just know how to make things pretty and America is so far behind that it is not even funny. 

@bulldogger 

Thanks for that input. 🙂

That's really interesting. I've read of amps distributing power to the channels on a when needed basis, but to turn off the channels all together is a great function. Wonder if their are any other multichannel amps that have this function?

This also means I have the option to go with either the Krell 5200 or the 7200, knowing that function is available. Whichever turns up.

I was hoping with advancement in technology would close the gap between multichannel and stereo amps.

Can you explain a bit what the differences in sound is when you run all channels vs shutting down and running only stereo?

Also, as Krell is an American brand, it is very difficult for me to get hold of a used example here in the UK. I wouldn't mind ordering from the states, but most of the amps are running on 120v whilst we run on 220-240v.

That's a good question, are there any multichannel amps that run a universal voltage (110-240v)? Could be a great addition to this forums list of amps.

 

Hi @jays_audio_lab , have you compared your Focal Maestro with the Wilson Alexx (or Alexia 2) already? I remember that you mentioned you would cover this comparison in a future thread/video. Thanks!

@abizzle55  The Krell amps are good. I have a Chorus 5200 XD. and the 300 Duo XD. The new Krell amps have an ethernet connection. I have used this to mute all but two channels of the Chorus 5200 XD. It makes it sound like a stereo amp. It's cleaner with the other channels muted for stereo. I have used my Iphone to access the webpage of the amp where you can turn the amp on and mute the channels. Multi-channel amps don't sound as good as stereo amps. The Krell and another amp I owned a California Audio Labs MCA 2500 are the only two amps that I know of that can do this. Both sound like stereo amps with the other channels muted. I have not tried this with the Chorus 7200.