General description The 2.1 Channel Subwoofer Preamp Board Amplifier is a finished product designed to enhance your audio experience with a low pass filter for bass amplification. Its compact size and robust metal construction make it a durable choice for audio enthusiasts. Technical specifications Maximum Power Per Channel: NO POWER Channels: 3 (2.1) Size: 98 x 40 mm Other information Package Contents: 1 x 2.1 channel preamplifier board Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product. The measurement allowed error is +/- 1-3 cm.