Gain controller shortage Check OK 600W × 1ch Bridgeable power amplifier Rated output: 300 W × 1 ch (4 Ω) / 500 W × 1 ch (2 Ω) / 800 W × 1 ch (1 Ω) Maximum output 600 W × 1 ch (4 Ω) / 1600 W × 1 ch (1 Ω) S / N ratio: 100dB Load impedance: 4 Ω (1 Ω to 8 Ω) Body only Scratch dirt You can also order by phone Please feel free to contact us Chiba Matsudo shop 047-710-0101 1 month warranty for peace of mind