Atma-sphere M-60 Mk 3.1 OTL Amps

This pair of Atma-sphere M-60 OTL mono block amps (serial no. 708) started out as Mk 3.0 and were upgraded by Atma-sphere to Mk 3.1 in March 2012. As such, a new 3-year warranty starts this year. The Mk 3.0 units had the nice curved case.

Also, according to Ralph Karsten at Atma-Sphere: "This amp is equipped with Teflon coupling caps. They are not V-Caps; instead they are caps we had made for us."

If you are not familiar, the power ratings are:

60 watts per channel into 8 Ω load
45 watts per channel into 4 Ω load
80 watts per channel into 16 Ω load

I am the second owner of these incredible amps.

They are conservatively rated "7" due to marks on the meter panels. These panels were replaced during the upgrade. I didn't even realize they had marks until I took the pictures. The marks are not really noticeable in average lighting and from a few feet away. The point being is that the marks are not as bad as what the flash photo seems to indicate.

Included in the sale are two full sets (32 tubes) of used output tubes (6AS7G) plus a few extra tubes including 2 or 3 new tubes. In all, about 38 or 40 tubes. Also included are a full set (8 tubes) of driver tubes (6SN7).

Power cables are not included. Jumpers for use with unbalanced (RCA) interconnects are included.

The amps will be shipped in their original box (one box for the pair). All of the tubes will be shipped in a separate box.

Paypal, add 3%.

Any questions, drop me a note. Thanks for looking.