They actually do say 300wpc in Class A George. The amps also have a bias switch and the manufacturer states they provide 200 wpc in Class A when the switch is in the low bias position.
The Clayton Audio M-300’s are high current differential True BalancedTM amplifiers using class A design in both the driver and output stage. All gain transistors are operated in their linear region for the smoothest, purest sound reproduction.They run very hot.
There are two levels of bias --- high and low --- for maximum user convenience. The low bias setting can be used when operating the unit in standby or for non-critical listening. Indeed, since the low bias setting still provides class A operation up to 200 watts, you should hear little difference between the settings most of the time. For the absolute highest quality reproduction of dynamic material and the most critical listening, the amplifiers should be set to the high bias level for full class A operation.
Rated power output:
300 Watts continuous rms into 8 ohms in Class A
600 Watts continuous rms into 4 ohms in Class A