User manual AUDIO DESIGN JX360-2

[. . . ] Thank you for purchasing a JL Audio amplifier for your automotive sound system. Your amplifier has been designed and manufactured to exacting standards in order to ensure years of musical enjoyment in your vehicle. For maximum performance, we highly recommend that you have your new amplifier installed by an authorized JL Audio dealer. Your authorized dealer has the training, expertise and installation equipment to ensure optimum performance from this product. [. . . ] Simply splice the appropriate left/right and positive/negative wires to the included harnesses and plug the harness into the "Hi-Level Inputs" connectors on the amplifier. The JX360/2 will attenuate the high-level signals to make them compatible with its input stage. " can be used to match the source unit's output voltage to the input stage the amplifier for maximum clean output. Rotating the control clockwise will result in higher sensitivity (louder for a given input voltage). Rotating the control counter-clockwise will result in lower sensitivity (quieter for a given input voltage. Make sure you observe correct polarity in making the "Hi-Level Input" connections. failure to do so will reduce bass and affect stereo imaging. The connections for the "Hi-Level Inputs" plug wires are as follows from left to right on the plug: The amplifier will turn on when +12V is present at its "Remote" input and turn off when +12V is switched off. If a source unit does not have a dedicated remote turn-on output, the amplifier's turn-on lead can be connected to +12V via a switch that derives power from an ignitionswitched circuit. 18 AWG wire is more than adequate for the remote turn-on connection. To connect the remote turn-on wire to the amplifier, strip 1/2inch (12 mm) of insulation from the wire and insert it into the "Remote" receptacle on the power connector. Channel 1 (Left) White: Left Positive (+) White/Black: Left Negative (­) Black: Common Ground (rarely used)* Channel 2 (Right) Gray: Right Positive (+) Gray/Black: Right Negative (­) *The only time you will use the Common Ground connections is with some older (pre-1980's) factory systems or head units that ground their speakers to chassis ground. To use these connections, ground the black wires on the plugs to chassis ground and only connect the Left and Right Positive plug wires to the factory radio outputs. To properly set the amplifier for maximum clean output, please refer to Appendix A (page 12) in this manual. After using this procedure, you can then adjust the "Input Sens. " level downward if this is required to achieve the desired system balance. " setting for any channel(s) of any amplifier in the system beyond the maximum level established during the procedure outlined in Appendix A (page 12). When the amplifier is bridged, both the Left and Right inputs must be fed with signal. FIlter controls The active filter built into the JX360/2 can be used to eliminate potentially harmful and/ or undesired frequencies from making their way through the amplifier section to the speaker(s). this serves to improve tonal balance and to avoid distortion and possible speaker failure. Correct use of this filter can substantially increase the longevity and fidelity of your audio system. (Hz)" A simple rotary control adjusts the filter cutoff frequency of the filter type you have selected with the "Filter Mode" switch. [. . . ] This output level can vary greatly between amplifiers but it should not be in the millivolt range with the source unit at half volume. If you are reading sufficient voltage, check your speaker connections as explained below. Check to ensure that the speaker wires are making a good connection with the metal inside the terminal block. The speaker wire connectors are designed to accept up to 8 AWG wire. [. . . ]