Eclipse XA1200 600 Watt Mono Class D Subwoofer Amplifier 600 watt amplifier Versatile Mono Block Design Can Drive Stereo System In Pairs Or For Use As A Dedicated Subwoofer Amplifier Ice Power(R) Full-Range Class D Operation High Efficiency Rate With Minimal Heat Built-Up Flexible To Pass 18 Db/Octave Filter To Match Amplifier To Speaker and/Or Subwoofer And Subsonic Filter