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High pass filter (HPF):
Call up the menu (Fig. 2).
Press the "CH2" button and select the HPF for each channel using the "CH1" to "CH4" buttons.
In the HPF settings you can switch one high pass filter per output channel. This is useful if you want
to actively connect separate speakers to your TQX while protecting the tweeter.
Help function:
Call up the menu (Fig. 2).
The help function can be called up by pressing the "CH3" key.