[. . . ] When carrying out installation work and making connections please observe the following safety instructions: - Disconnect the negative terminal of the battery! [. . . ] The amplifier's own fuse protects the amplifier itself, but not the car battery. Connect red wire 6 with positive battery, the wire 7 with negative vehicle ground and the control wire 8 with the control output (e. The VRB 8A has two drive options, either via the preamplifier output terminals or the loudspeaker output terminals of the car stereo equipment. preamplifier output terminals are connected to cinch (RCA) jacks of the Woofer Box via a shielded audio line. When using the loudpeaker output terminals as drive option, run the input leads 9 and : to the nearest loudspeaker cables (front or back) on the left and on the right, separate them and connect to the input terminals. Bridge output terminals (BTL), can also be connected without an additional adaptor. 1 2 3 4 5 6 7 8 9 : ; Input sensitivity Phase adjustment Crossover frequency Connection sockets Preamplifier input jacks + battery, red - ground, black ON/OFF control input, yellow Loudspeaker input left Loudspeaker input right Fuse 20 A Turn on the system and select a music track from a CD or cassette that contains powerful bass. Now slowly turn up the Gain control 1 until you clearly hear an increase in the bass level. [. . . ] Before using the equipment, we recommend you set the controls to the following positions: Gain, position 1 at mi4 Ledningen 6 röd ansluts till bilbatteriets plus-pol, ledningen 7 svart till 9 This information is subject to change without notice! [. . . ]