Finally, turn your attention to the CH

a sharper filter slope that more aggressively attenuates frequencies above the selected “Filter Freq.” setting. Neither setting is inherently “better”, but in general, the shallower “12dB” setting is more desirable for a subwoofer having to fire from a trunk into the cabin of a sedan or coupe. The sharper “24dB” setting is typically better in a hatchback, SUV or wagon application. Experiment to find the slope setting that results in the smoothest subwoofer to midbass transition.

Next, turn your attention to the “CH 3 & 4” Controls and select “BP” (bandpass) on the “Filter Mode” switch. A bandpass filter is actually composed of two filters (one high-pass and one low-pass), which in combination allow a defined “band” of frequencies to pass through the amplifier channels and onto the speakers. These are ideal for actively filtered mid-bass or mid- range speakers in automotive sound systems.

Now that you have engaged Bandpass Mode for Channels 3 & 4, select an appropriate “Filter Freq.” (again, 80 Hz is a good starting point).

The Filter Frequency you are adjusting with this control is the high-pass portion of the bandpass filter. The low-pass portion is automatically set by the tweeter channel’s “Filter Freq.” adjustment (CH 1 & 2). The low-pass portion of the bandpass filter will always track with the CH 1 & 2 “Filter Freq.” setting.

Finally, turn your attention to the “CH 1

&2” Controls and select “x10” (high-pass) on the “HP Filter Mode” switch. This switch position multiplies the indicated “Filter Freq.” value by a factor of 10, so that an indicated frequency of 500 Hz is actually a filter frequency of 5000 Hz (5 kHz). The filter slope for this section is fixed at 12dB/octave.

Now, select an appropriate “Filter Freq.” for your tweeters (5000 Hz is a good starting point). Before attempting any lower frequency settings, consult the documentation for the tweeters you are using and make sure you will not be driving the tweeters with frequencies lower than they are designed to handle. JL Audio mobile component tweeters should not be operated with Filter Frequencies lower than 3 kHz.

After proper adjustment of the “Input Sens.” controls for both main channel pairs and the subwoofer channel using the method shown in Appendix A (page 14), you can fine tune filter frequencies and attenuate either pair of channels to achieve proper balance. For precise filter frequency information refer to Appendix B (page 15)

To operate two XD700/5’s in Tri-Amplified mode (one for left channel and the other for right channel), set the “Input Mode” switches of both amplifiers in “2 Ch.” mode, and apply the left channel signal to both the left and right inputs of the first amplifier’s Channel 1 & 2 Inputs, using an RCA y-adaptor with one female and two male ends. Then apply the right channel signal to both the left and right inputs of the second amplifier’s Channel 1 & 2 inputs, using a second RCA y-adaptor with one female and two male ends.