SUB250W HiFi Amplifier Board 4558 op amp 250W Max Output Subwoofer Amplifier Board for Enthusiasts DIY Lovers 2022 NewOOTDTY  Features: Adopts four field effect high power push tubes topropel an 8-12 inch independent subwoofer, high power and little distortion. Features speaker circuit protection, reliable to work. Equipped with a separate pre-stage tuning, it is very convenient to assembly. Two filter capacitors, which ensures sound quality, safe and reliable. Perfect for home speaker DIY replacement repair. Specification: Model Name: SUB250W Subwoofer Working Power: Dual AC22-26VOutput Power: 250W (Max)Chip Type: FETOp amp type: 4558Pre-timing: Volume+Bass AdjustmentMaterial: Printed Circuit BoardSize: Approx. 14x8.5 cm/5.51x3.35 inchPackage Includes: 1 Piece 250W Subwoofer Amplifier Boardnote: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you order.Due to the difference between different monitors, the picture may not reflect the actual color of the item.