InfoComm 2015: Soundtube Presents MA501t Compact Constant Voltage Amplifier June 17, 2015 | Home / June 17, 2015 rave-video / InfoComm 2015: Soundtube Presents MA501t Compact Constant Voltage Amplifier InfoComm 2015: Soundtube Presents MA501t Compact Constant Voltage Amplifier