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manual abstract
To connect the remote turn-on wire to the amplifier, strip 1/2-inch (12 mm) of insulation from the wire and insert it into the “Remote” receptacle on the power connector. Tighten the connector down using a Phillips screwdriver. inPut seCtions The J2-360.2’s has one pair of stereo inputs.The input section input section offers two input connection methods, one for high-level (speaker level) signals and one for low-level (preamp level) signals. 1) Low-Level Inputs: A standard left/ right pair of RCA type jacks in the “Amplifier Inputs” section is used for preamp level (low-level) signal input on the J2-360.2. This is the preferred connection method whenever available. PreampAmplifier Outputs Inputs LEFT min Input Sens RIGHT RIGHT 2) High-Level Inputs: If your system does not offer a preamp level signal option, you can connect speaker level signals directly to the “High-Level Inputs” connectors using the supplied mating connectors and wire harnesses. Simply splice the appropriate left/right and positive/negative wires to the included harnesses and plug the harness into the “High-Level Inputs” connectors on the amplifier. The J2-360.2 will attenuate the high- level signals to make them compatible with its input stages. High-Level Inputs ! IMPORTANT Make sure you observe correct polarity in making the “High Level Input” connections. Failure to do so will reduce bass and affect stereo imaging. The connections for the “High Level Inputs” plug wires are as follows from left to right on the plug: Channels 1&2 (FRONT) White: Left Positive (+) White/Black: Left Negative (–) Black: Common Ground (rarely used)* Gray: Right Positive (+) Gray/Black: Right Negative (–) Channels 3&4 (REAR or SUB) Green: Left Positive (+) Green/Black: Left Negative (–) Black: Common Ground (rarely used)* Purple: Right Positive (+) Purple/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. inPut sensitivitY Controls The control labeled “Input Sens.” 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.) min max Input Sens. 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 any or all “Input Sens.” levels downward if this is required to achieve the desired system balance. IMPORTANT! Do not increase any “Input Sens.” 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). Doing so will result in audible distortion and possible speaker damage. JL Audio Filter Controls The active filter built into the J2-360.2 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. HP | Off | LP Filter Mode 50 500 Filter Frequency (Hz) 1) “Filter Mode” Control: The J2-360.2 employs a 12dB per octave filter. This filter can be configured into one of two filter types or defeated completely by way of the three- position “Filter Mode” switch: “HP” (High-Pass): Configures the filter to attenuate frequencies below the selected filter frequency at a rate of 12dB per octave. This is useful for connection of component speakers the J2-360.2’s in a bi-amplified system. Off”: Defeats the filter completely, allowing the full range of frequencies present at the inputs to feed the amplifier. This is useful for systems utilizing outboard crossovers or requiring full- range reproduction from the J2-360.2. “LP” (Low-Pass): Configures the filter to attenuate frequencies above the selected filter frequency at a rate of 12dB per octave. This is useful for connection of subwoofer(s) to the J2-360.2’s in a bi-amplified system. 2) “Filter Freq. (Hz)” The J2-360.2 has separate Filter Frequency controls in each Channel Controls section for the low-pass filter and the high-pass filter. You will only use one of these in each channel section, depending on which “Filter Mode” you have selected (or none of them if you have selected the “Off” position for the “Filter Mode”). When active, the filter in the J2-360.2 is fully variable between 50 Hz and 500 Hz via the control knob labeled “Filter Frequency (Hz)”. The “9 o’clock” position corresponds to 80 Hz and...