ITEM NAME:Low Pass Filter Bass Subwoofer Pre-AMP Amplifier Board Dual Power NE5532 Lo J2A2 Low Pass Filter Bass Subwoofer Pre-AMP Amplifier Board Dual Power NE5532 Lo J2A2 Channels: 2 (2.0) Maximum Power Per Channel: 10W colour:blue Material:Metal +pc size:66*28mm Package Contents: 1* low pass filter bass preamplifier DIY Kit.1 low pass filter bass preamplifier DIY Kit. Maximum Power Per Channel: 10W.