What are the maximum AC power consumption specifications for the REF1000, S300, and S300i?
Idle consumption is 15W for the REF1000, 10W for the S300 and 5W for the M300. Peak power consumption could be over 1000W for the REF1000, 600 for the S300 and 300 for the M300. Likely you will not exceed 50W of average power consumption even when listening very loud for a long period of time (watch your ears…).