JBL MS-A1004 User Manual

Also see for MS-A1004: User guide User guide

Contents

7www.jbl.comEnglishMs-A1004 CONNeCTiONsPower inputs1. +12V Power inputConnect the unit to the vehicle battery using a minimum size of 8 AWG(8mm²) wire with a 60A fuse placed within 18 inches (45.7cm) of the positivebattery terminal. Be sure to use an insulation grommet at every location wherethe power wire will pass through metal.2. remote Turn-On input (Optional to Connect)No discrete remote-turn-on connection to the MS-A1004 is necessary. If yourhead unit includes a remote-turn-on lead and you wish to connect it, connectthe unit to this terminal.3. Chassis Ground inputUsing at least 8 AWG (8mm²) wire, connect this terminal to a nearby point ofthe vehicle’s chassis (sheet metal). Scrape away the paint from the area toensure a good connection. Do not ground the amplifier to the vehicle’s frame.Audio inputs1. Using rCA OutputsIf the unit that precedes this amplifier in the signal chain includes RCA-typeoutput connectors, connect them directly to the RCA inputs of this amplifier.2. Using speaker-Level signalsIf the preceding equipment doesn’t have RCA-type connectors, use the RCA-to-bare-wire adapters included with the MS-A1004. Connect the + signal tothe terminal marked + and the – signal to the terminal marked –.Pass-Through Audio Outputs (Full-range)Input channels 1 and 3 are summed and sent to the top RCA output. Inputs 2and 4 are summed and sent to the bottom RCA output. Using these outputs,additional amplifiers can be easily added. For example: When using the MS-A1004 for front and rear speakers, you could use these outputs for a subwooferamplifier. The outputs are full-range. No high-pass or low-pass filters are appliedin the MS-A1004.speaker OutputsConnect each speaker to the amplifier channel that will correspond to the inputused or how it’s assigned. See “Setting the Input Mixer” to learn how to assignthe input signals to the output channel pair. Be sure to observe proper polaritywhen connecting the speakers to the outputs.1. stereo ConnectionConnect the left-channel loudspeaker(s) to the output terminals correspondingto the left-channel input. Connect the right-channel speaker(s) to the outputterminals corresponding to the right-channel input.2. Bridged ConnectionConnect the positive terminal on the loudspeaker(s) to the positive (+) terminalon Channel 1 (or 3). Connect the negative terminal on the speaker(s) to thenegative (–) terminal on Channel 2 (or 4).See “System Diagrams” for examples of system configurations in which theamplifier is most commonly used.+-1 x 60A