WONDOM 1 X 500W 4Ω High Power Class D Digita Audio Amplifier Board Mono Amp Module - IRS2092 For Home Speaker DIY WONDOM 1 X 500W 4Ω High Power Class D Digita Audio Amplifier Board Mono Amp Module - IRS2092 For Home Speaker DIY. Sale price : $83.61 Category : Consumer Electronics