The TSD-PA122G 4Ω stereo amplifier is perfectly suited for almost any general amplification requirement. Perfect for adding sound reinforcement to small projector systems as it provides ample power to drive up to four 8Ω speakers in a classroom or boardroom application. Output is 12W per channel at 4Ω or 24W bridged mono at 8Ω. Input is via balanced stereo phoenix style and unbalanced RCA connectors. Front panel gain controls provide adjustment for both left/right or bridged outputs and include removable knobs.