Hpf (High Pass Filter); Lpf (Low Pass Filter); X-Over (Crossover); Confirmation - Yamaha PX10 Reference Manual

 HPF (high pass filter)
(If "SP SERIES" is "GENERIC")
Selects the cutoff frequency of the HPF. Common to both channels A and B.
NOTE
In Basic mode, the filter type is fixed to 24 dB/Oct., Butterworth type.
 LPF (low pass filter)
+
(If "AMP MODE" is "SUB SUB" and "SP SERIES" is "GENERIC")
Selects the cutoff frequency of the LPF. Common to both channels A and B.
NOTE
In Basic mode, the filter type is fixed to 24 dB/Oct., Butterworth type.
Panel Operation — CONFIG WIZARD screen (Basic mode)
 X-OVER (crossover)
+
(If "AMP MODE" is "FULL SUB" and "SP SERIES" is "GENERIC")
Selects the crossover frequency of the full-range speaker and subwoofer.
NOTE
In Basic mode, the filter type is fixed to 24 dB/Oct., Linkwitz Riley type.
 CONFIRMATION
Applies the set value.
After confirming the setting is appropriate, press the main knob to actually apply the set
value.
To correct the setting, press the [ ] (back) key to return to the screen to be corrected.
To cancel the setting, press the [MENU] key or press and hold the [
confirmation screen appears.
] (back) key until a
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PX10/PX8/PX5/PX3 Reference Manual