The TOA WE-2 Expanding Kit increases the number of input of the TOA W-906A and W-912A IN-WALL amplifiers. Two more module input ports can be set up by inserting his expanding kit into amplifier's user's blank space, thus allowing the W-906A and W-912A amplifiers to have up to 8 inputs. it is possible to control the sound volume of an individual input. The WE-2 can accomodate all TOA modules for the 900 Series Amplifirers.