AHUJA DPA-370 30 Watts PA Amplifier with Built-in Player AHUJA DPA-370 Amplifier 30 WATTS AC & 12V DC Operation 2 Mic & 1 Aux Input. Built-in MP3 player with USB reader and remote control. Line Output for connecting to a Booster Amplifier. Cut type tone control. Instant transfer to DC Power (Car Battery) if AC power fails.