... performance!Karaoke Power Amplifier, professional amplifier, sound amplifier, pa amplifier, pro audio.professional audio equipment, pro sound system, pa system, stereo amplifier, audio amplifier. 1. Microphone expand dynamically by ... wireless remote controller.3. Auto vocal changing & MULTI-Sounding5. 5-Microphone inputs (front 3, rear 2)6. DSP digital echo, delay ...