Rich; organic true balanced amp w good detail $6k


Suggestions welcomed & appreciated- here are the Criteria:

- fully balanced architecture
- rich, organic sound, extended bass, silky highs, but not at the expense of obscuring detail
- No OTL (too many tubes/heat)
- SS (Class A bias) or tubes OK
- 20-200 wpc ok, the lower the better though all things being equal- well built power supply crucial
- stereo amp easier to put on my Sistrum rack, but mono-bock architecture also considered if better performance
- $6k or less used would be ideal, but would consider up to $8k used if there are no world-beating contenders at the $5k-$6k used price point

Preamp is a modded Sonic Frontiers Line 3- extremely neutral, hence the desire for a richer-sounding amp to balance. High efficiency speakers from Coincident- large open concept room (main floor of house). Re: tubes, have used ARC VT-100 MKIII- good- airy w big soundstage, but meatier mids would be better. Also had Wyetech Topaz 20-watt SET, superb, if slightly lean in the mids (and not fully balanced, but shows you how powerful 20 watts can sound with a well-built power supply) For SS, am considering Pass XA.5 series (they now can run balanced from what I understand?); Clayton Audio M-200 (but unfortunately over the price-range).

Thanks in advance for any suggestions- I have an open mind, so bring it on!
sutts
How about the moscode 401HR;200 watts per channel, a 30 day in home trial period, it lets the owner do a lot of tube rolling that should not break the bank. The only requirement it does not meet is it not a balanced amp.
I have and really like VTL 450s from a few years back (no autobias and different caps than before). I think they are great. However, if you have high-efficiency Coincidents, the 450s might be a bit of overkill (like they are with my speakers). The Coincidents are reasonably benign loads as well so I think you could get away with less "beef."

Another couple of amps I can toss in the mix if you can find them used would be EAR 890(s) or EAR 861(s). They are both stereo amps which can be bridged and used as monoblocks. The 890 uses a KT90 tube and the 861 uses a EL519 tube (originally a TV set tube) in "enhanced triode mode". Both amps (and almost all EAR amps) have quite beefy transformers. They both have true balanced inputs, both work in Class A, both are quite easy on their respective tubes (the EL519 has a VERY long life) and both amps are very easy on the user (autobiasing, very little to do, long tube life).

If it were my choice, I might go for a PAIR of EAR 861s (which, when bridged, would put out 64W per channel). They have no feedback, are extremely linear, and I find the midrange and highs to be absolutely wonderful with this tube and depending on which Coincidents you have, you might be able to get by with a single amp just fine (the 890 would be no problem as one amp is 70Wx2). If you found them used, they would probably be in the price range for two (ditto for one 890). And in any case, you could get one, use it, and if you decided you needed a bit more oomph later, you could get a second. I love the tube...
Manley makes sweet sounding amps that can be run in triode or tetrode modes. I would say with your set up triode would be what you're looking for. A lot of amp for the money.
Jmcg- yes, re: the Pass, I don't believe the XA-60 is balanced, but I could be wrong- I only know the newer XA-30.5 is. Belles MB-01? Hmmm- any writeups on this one? As for the VTL 450- I am sure the newer version would be mucho denaro $$$! You had Claytons? cool- it sounds like the new M-200's would fit all parameters except for cost ($9,500 new). One amp everyone seems to agree on though are the Lamms.

Rleff- have never heard Moscode- is it also a true balanced design? Do they have lower powerered versions, and how would you describe their sonic signature?

T_bone- EAR- yes! Have heard some great stuff about that guy's products. I will have to see if they have a Canadian dealer somwhere- would really like to give them a listen- would the 861's be the sweeter-sounding of the two? (compared to the 890)

Apache- yes, Manley was mentioned earlier- good thought, but am not sure if they run balanced, and how hard they are on tubes, in fact not even sure which are their best models.
Sutts;
I listened to the 401HR on my friends soundlab a3's and was very impressed.Moscode is a tube hybrid rated at 200 watts per channel;listening to the A3's there was a large soundstage,excellant bass control and the strings seemed just natural to me (proper timbre I guess).
I have soundlab m2's and was going to buy one of these myself except I decided to try the OTL experience;if I was going another direction the Moscode would be on my short list.Moscode website is www.moscode.com;the only spec that it does not meet as you listed is it does not have balanced inputs.