System 500W RMS at 4 ohm 620W RMS power gives 2Ω, 4Ω 500W RMS, 8Ω 380W RMS Circuit of the original scheme 8 MOSFETs used and 4Ω 400W writes 2Ω speakers in order to work 10 mosfet I used... Electronics Projects, RMS 500W Amplifier Circuit "audio amplifier circuits, transistor amplifier, " Date 2019/08/01