-24V Super Heavy Bass Preamp Board is a pre-assembled board designed for low-frequency . It features a powerful bass effect that immerses you in the . With a wide voltage input range, it is suitable for different power supplies. The pre-assembled design allows for convenient and quick installation and . The low-pass filter board effectively filters out high-frequency noise, providing sound. Features -Color:Green -Material:FR-4 fiberglass board, copper -Size:8.00X5.00X2.00cm/3.14X1.97X0.79in -Power supply voltage: 10-24V power supply -Frequency range: 22Hz-300Hz -Audio input: mono or -Audio Output: mono audio -Distance between the center of the fixing holes: 70x24mm -Hole diameter: 3.2mm -Potentiometer shaft center spacing: 32.5mm -Note: The accessory is in random color. - Multi-functional audio mixer, adjustable tone, preamp, volume, and etc. - Equipped with preamp, clear sound, no noise. Designed with rotary knob for easy operation - finished product, easy to install. Suitable for audio equipment, recording and other occasions - Flexible to , easy to upgrade, and suitable for different tastes - The circuit board wiring is reasonable, the noise is low, and the component layout is beautiful and generous, which can fully satisfy your discerning vision Package list: 1 amplifier