ITEM NAME:DX-0602 2.0 High Power DIY Speaker Amplifier Board 4558 OP AMP AC15-22V Description: Model: DX-0602 Working voltage: double AC15-22V Maximum output: 80W + 80W Op Amp Type: 4558 Chip type: FET Size: 18 x 12.5 x 6cm Weight: 195g Package Includes: 1 x Speaker Amplifier Board SKU: ALU0025390368029637.Op Amp Type: 4558. 1 x Speaker Amplifier Board. People always bought together with. SKU: ALU0025390368029637. Model: DX-0602.