In the Owner’s Manuals for the XD700/5v2 and the XD1000/5v2 we state that when setting the amplifier in tri-amplified mode you should set the “Input Mode” switch to “2 Ch.” mode and use a stereo signal into Ch. 1&2 Inputs only. While this is perfectly acceptable, there is another way that may be more flexible.
If your source unit has a separate subwoofer output, you can send signal into channels 1&2 as you would normally, but you can also send the subwoofer signal into channels 5&6 and set the “Input Mode” switch to “6 Ch.”. This will allow you to control the level of the subwoofer from your source unit.
So, to summarize bandpass operation on both models:
If your source unit has only two channels of audio outputs, select the “2 Ch.” input mode and connect the inputs to Channels 1&2. If you want to have a subwoofer level control, you can use our optional HD-RLC and set the “Remote Level Mode” switch to “Sub Ch”.
If your source unit has two main channels of audio and a separate subwoofer output, select the “6 Ch.” input mode and connect the main channels to Channels 1&2 and the subwoofer channels to Channels 5&6. This will allow you to adjust the level of your subwoofer from the control on the head unit without the need to purchase the HD-RLC.
As a side note, the inputs on Channels 3&4 are not used when the amplifier is in bandpass mode. Connecting signal to these channels will not harm the amplifier, but it will have no effect on the system.