[. . . ] GTO7001 OWNER'S MANUAL 1x 10-3/8" 263mm 15" 380mm 2-1/8" 53mm Optional RLC 1" 25mm AB 1-5/8" 40mm A B C D A GTO7001 CAR AUDIO SUBWOOFER AMPLIFIER OWNER'S MANUAL Installation Warnings and Tips · Disconnect the negative (­) lead from your vehicle's battery. [. . . ] · Set the Boost control according to your preference, being careful not to apply enough boost to damage your woofer(s). A DBO High-Pass Filter Frequency control, variable between 10Hz and 100Hz. B DBO Boost control provides up to 12dB of boost slightly above the highpass filter's frequency. Optional Remote Level Control (RLC) Connector · Connect the Remote Level Control (RLC) here, using the RJ-11 cable (supplied with the RLC). Protect LED · Illuminated under any of the following fault conditions: battery over/under voltage, short circuit in speaker wires, amplifier is too hot, amplifier's output circuit has failed (DC voltage is present in the amplifier's output). Setting Input Level A Turn Input Level control counterclockwise to 6V (minimim). B With a dynamic music track playing, turn the head unit's volume control to the 3/4 position. C Turn Input Level control clockwise until the bass output is proportionate to the output of the high-frequency speakers, according to your preference. [. . . ] 2, route de Tours 72500 Château du Loir France declare in own responsibility that the product described in this owner's manual is in compliance with technical standards: EN 55013:2001+A1:2003 EN 55020:2002+A1:2003 Klaus Lebherz Harman Consumer Group, Inc. [. . . ]