- Stereo Power Amplifier 250 x 250 Watts. ( R.M.S )- Power Requirements 220 VAC 50 / 60 Hz- SW. Selector ( Bridge, Stereo, Parallel )- Balance Jack Speaker- ขนาด 59*57.5*15 cm- LED Power On- LED Protect- LED Signal Display, LED Peak- LED Over- LED Signal Display, LED Peak- EI Transformer- Fan Cooling System- Speaker Protection