I have an Alpine ERE-G180, used for about 2 months. 1 Input. 3 Outputs, Front, Rear, Sub. 11 band. Low pass filter, with knob on front for changes, and sub signal on/off by pushing the knob in. Also has BBE processing for if you have an Alpine HU and fader control. $100 shipped because it has some scratches on top of unit. (Not visible when installed)