Refer Silicon Chip August 2007
Adding a subwoofer to your home theatre or Hi-Fi system is the easiest way to extend its bass response. Using this kit to control your external speaker and sub-amplifier can give you loads of bass without taking up much space. The kit has all the features you could want, including low and high pass filters, parametric equaliser and auto-turn on for external equipment. The controller is 12V DC powered and can also be used in automotive applications. Kit supplied with silk screened PCB and laser processed panels.