Connecting SUB - High/Low Pass Filters not working.

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It doesn't matter that the Configurator reverts to Pre-Out OFF when you exit the Speaker settings; think of Pre-Out ON and OFF as separate parts of the configuration, both of which can be set and stored independently. Both configurations are present on the SD card and loaded into the amplifier when it reads the card. When you use the remote to switch between pre-out on and off when the amp is running, you're switching between the two different sets of configuration.

This is really handy because you can set the speakers to full-range in the Pre-Out OFF tab, but high-pass filtered in the Pre-Out ON tab. Then turning the sub (pre-out) on and off does the right thing.

Hope that helps...