In Reply to: how to determine if Atma S-30 or M-60 contain upgrades posted by flat6 on February 5, 2014 at 23:20:57:
If you call Atma-Sphere and tell them the serial number of the amp, they can tell you which upgrades it has.
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Follow Ups
- Call Ralph - goober 05:28:50 02/06/14 (0)