For sale is a pair of Atma-Sphere OTL M-50 monoblocks in Champagne -Gold which were upgraded to M-60 MKIII (I'm not the original owner so can't provide details but the upgrade were done at the factory. Original 12AU7/12AT7 input/driver stage was replaced with current 4x6SN7 configuration. The update included wiring ,choke, Hexfred diodes and latest resistor change. Apparently the amps can be upgraded to 3.2 status at the factory for about $1050 (those interested should check first). The Atmasphere M60 MK3.1 amps are in good cosmetic and operating condition and play wonderfully - spacious, airy sound with huge sound stage. Rated 7/10 because of age and multiple ownership. Amps require 16 6AS7 power tubes but will come with 25; more than half are American GE, RCA, Sylvania. 16 6SN7 tubes also included. The included 6SN7 tubes are a pair of Sophia (shown in the fourth picture), RCA, Sylvania (my backup set are NOS tubes). Amps will be shipped in two boxes for safe transit, with tubes sent in separate box. The amplifiers come with generic power cords. Shipping to verified PaypPal address in the continental US. PayPal fees included in asking price. I will include two Coincident Extreme power cords for $200 (for the pair) if the buyer meets my asking price. The power cords were purchased directly from Israel Blume. They are l;abeles CST, but are the Extremes. The Coincident cords are a worthwhile upgrade to these amplifiers. I am willing to sell the power cords separately for $450 for the pair.
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