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Sony Class A, think not

I am sure that it sounds ok but Class A it is not. If it drew 300 watts continuously with what little heat sinks it has it would get really hot. It probably draws 300 watts Max.

From WhatHifi:
On a practical note, it does tend to run rather warm when pushed hard, so make sure it has enough ventilation around it when placed in an equipment support.

Class AB with probably a lowish bias given the heat sink sizes I have seen from pictures of the guts.

JA from Stereophile notes in many of his amp test measurements that Class AB amps get thermally maximally stressed at continuous 1/3rd power. Some he has tested actually break in that test.



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