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Atmasphere amps trustable?

Tube world, a big world, then I came acorss the Atmasphere on the net, looks different from those common tube stuff... kinda weird, the M-60 uses 8x 6AS7G output tube and 4x 6SN7 driver tube per channel, where're the rectifier tubes? Plus they're so-called OTL, sounds even more weird.
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bojack
636 posts
 
I came home one time, and I found my M-60 Mk II's in BED with my Spendors...I will never get the image out of my mind, and I sold them both the next day. By far the most two-faced, untrustworthy amps I've ever bought.
geoffkait's avatar
geoffkait
23,365 posts
 
Were they having, uh, group delay?

markus1299
252 posts
 
I have some Atmasphere Novacrons mated with Classic Audio 3.3 speakers in a 20X18 room that just sound fabulous. Very reliable 
achipo
58 posts
 
I built a pair of M60s 20 years ago and they're still going strong.  I did send them back to Ralph for an upgrade and to check them out a couple years ago.  I highly recommend them--rock solid performance.
achipo
58 posts
 
P.S. Atmaspheres do like a higher speaker impedance--I use Paul Speltz Zero autoformers as speaker wires, which bring the impedance of my Kef Reference 207/2s up to a respectable ~8 Ohm minimum and 14 Ohm avg which increases the output of the amps up into the 70W range.
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