User manual JBL OSM3

[. . . ] · Turn off all audio systems and other electrical devices before you start. Disconnect the (­) negative lead from your vehicle's battery. · Check clearances on both sides of a planned mounting surface before drilling any holes or installing any screws. Remember that the screws can extend behind the surface. [. . . ] Use extreme caution when cutting or drilling in and around these areas. · Before drilling or cutting holes, use a utility knife to remove unwanted fabric or vinyl to keep material from snagging in a drill bit. · When routing cables, keep input-signal cables away from power cables and speaker wires. · When making connections, make certain they are secure and properly insulated. · If the amplifier's fuse must be replaced, use only the same type and rating as that of the original. Do not substitute another kind. 2 BP150. 1, BP300. 1, BP600. 1, BP1200. 1 FUSES 40A x 3 P80. 2, P180. 2 FUSES 20A x 2 ­ + ­ + + BATT REM POWER GND --L -- + -- R SPEAKER OUTPUTS BRIDGED SPEAKER OUTPUTS + + +BATT REM POWER GND R R INPUT LEVEL LPF FREQ BASS BOOST +R­ ­ L+ R INPUT LEVEL INPUT MODE X-OVER FLAT HP LP 32Hz320Hz FREQ ST MD + R­ ­ L+ L L +R­ ­ L+ 4V 250mV 32Hz 320Hz 0dB +6dB HIGH LEVEL FRONT INPUTS HIGH LEVEL REAR INPUTS HIGH LEVEL L INPUTS 4V 250mV Note: Drawing is provided only for connector, control and fuse location. Please see "Specifications" for fuse requirements. Note: Drawing is provided only for connector, control and fuse location. Please see "Specifications" for fuse requirements. Figure 1 Figure 2 OSM3 R X-OVER FLAT HP LP INPUT MODE ST MD ST MD X-OVER FLAT HP LP R +R­ ­L+ L HIGH LEVEL 4V 250mV 32Hz 320Hz 32Hz 320Hz 4V 250mV +R­ L ­L+ HIGH LEVEL LEVEL FREQ FREQ LEVEL FRONT REAR SPEAKER OUTPUTS FUSES 20A x 2 FRONT REAR +BATT REM POWER GND ­ ­ L + BRIDGED ­ R + + Figure 3 3 FREQUENCY Crossover Wiring the Power Connections Refer to Figures 1­3 for connector locations. All the Power Series amplifiers will accept up to 4-gauge power and ground wire. For power, remote and ground connections, strip off one end of each jacket to reveal bare wire for insertion into the connectors. Connect a wire from the GND connector on the amplifier to the nearest bare-metal chassis component; scrape away the paint to ensure good conductivity. If your source unit has only one pair of RCA-type output connectors and a pair of speaker-level outputs, you may connect the RCA outputs to a pair of amplifier input channels (front or rear), and the speaker level outputs to the other pair of amplifier input channels. If nonfading bass is not important in your system, connect a pair of inputs, either speaker-level or RCA-type, to either the front or rear input connectors on the amplifier. System Setup and Adjustment Refer to figures 1­6 for location of adjustment switches and controls. Electronic Crossover and Bass Boost P80. 2, OSM3, P180. 2 The electronic crossover can be selected as a 12dB/oct. low-pass filter (LPF) or it can be defeated (FLAT). The crossover frequency can be set at any frequency between 32Hz and 320Hz. BP150. 1, BP300. 1, BP600. 1, BP1200. 1 These amplifiers are designed to drive subwoofers. Consequently, the electronic crossover is a 12dB/oct. low-pass filter which can be set at any frequency between 32Hz and 320Hz. The bass boost control will provide up to 6dB of boost at 50Hz. Initially, turn the input-sensitivity LEVEL control to its maximum (counter-clockwise) position. Turn on the source unit and increase the volume control until it is approximately three-quarters of maximum-output level. [. . . ] Slowly increase the input LEVEL control (clockwise) while listening to the quality of the reproduced sound. When you hear distortion on the music peaks, turn the LEVEL control back slightly. This is the maximum undistorted output level of your system. Turning the LEVEL control up farther WILL NOT INCREASE THE OUTPUT POWER OF YOUR AMPLIFIER! [. . . ]