Rockville RW10CA 10" 800 Watts Peak/200 Watts RMS Slim Powered/Active Sealed Car Subwoofer With Bass Remote. Amplifier will not power up: Check to make sure you have a good ground connection, check that the Remote Input (Turn-On) has at least 5VDC, check that there is battery power on the (+) terminal, check that there is at least 12v, check all fuse, replace if necessary, make sure that the Protection LED not illuminated. If it is lit, shut off the amplifier briefly, and then repower it.