Atma-Sphere M60 or David Berning ZH270?


Hi, I need some helps to decide which one of these two amplifiers to go with my 14ohm Coincident Super Eclipse (SE).

The Atma-Sphere seems a perfect match for the SE at least in impedance matching and at 14ohm, may get more power than 60 watts. The ZH270 may get less than 70 watts @14ohm. However, I have the following concerns for the M60:

1. 8 6AS7 output tubes per side generates a lot of heat and it does not have cage protection. This is quite a problem if you have young children at home like me. The ZH270 has tubes internal (like a Tube preamplifier) and thus safer for young children.

2. 16 6AS7, though last long time, can be more expensive than ZH270's 4 6JN6 if I try to replace them.

Pro for ZH270 can run without a preamp and is auto-biasing.

On the other hand, ZH270 is more expensive ($4995) than M60 MKII.2 ($4250) (current still have a few left).

As far as the most important factor: sound? I have no idea at all. I have not heard either one anywhere. I have owned ASL Hurricane for over a year and like the sound very much but disappointed for the constant re-biasing and QC problem.

Does any one have Reliability problem with either one?

My listening room is 13Wx8Hx26L and I listen almost only classical music from solo violin, piano, to chamber music to 20 century's big symphony orchestra works (Mahler, Strauss, Stravinsky, etc.).

Thanks for the helps.
laoyuap

Showing 2 responses by artg

hmmm bery interesting thread. i had the Atma's in my system (the MA-1's) and loved them with my Sonus Faber Guarneri Homage's, in fact i liked them much more than amps from VTL, AR, Bel Canto and CJ. Ultimately, i preferred the sound of the Atma's, but but there were some serious practical considerations - heat ( A LOT OF IT, which is ok in MN winter, but any other time of the year, forget it), open tubes (i have a 2 and a 4 yr old), monoblock design and upkeep(not cheap).

Still, as i have mentioned in other posts, i was still ready to buy a set - then i bought the Berning, mostly on a whim, and have not looked back. It provided 95% of all that 'magic' that atmas did, yet gave better bass and dynamics, and runs only as hot as a 300 watt light bulb. I love this amp more than anything else in my system (well, equal to the Guarneris)

Having said all that, i think both are excellent, but for my $, the Berning is a better all-around performer, and has all those built-in practical advantages.
Laoyup - well done! As i mentioned, bot hare excellent, but you will not regret your decision to get the Berning. Welcome to the club of the lucky few who have these amazing pieces.