Building on the award-winning performance of the Niles SI-1230, the new Niles SI1260 offers custom installers more power, more flexibility and an easier installation. Unique BusMatrix selector allows each channel to select from 4 options: left bus, right bus, left plus right bus (mono), or the channel`s dedicated input. Three turn-on modes: music sense, voltage trigger and manual. Independent level controls for each channel. Chassis Isolation Circuit eliminates Ground Loops. 12-volt control out. Removable 2-wire line cord.