efore I tested one of the Esoteric M1X amplifiers, serial number 20014, with my Audio Precision SYS2722, I preconditioned the amplifier, following the CEA’s recommendation of operating it at one-eighth the specified power into 8 ohms for 30 minutes. At the end of that time, the internal heatsinks were fairly warm, at 105.7°F (40.8°C), though the top panel’s temperature was just 82.6°F (28.1°C). As JVS had told me that the M1X’s sound quality improved after a lengthy
