I have a Blaupunkt GTA 470 SF amp which will power Morel Tempo 6' as the front stage and a RF P1S4-8 sub in bridged mode. HU in question is an Alpine 9886.
Thing is the amp has a variable knob for LPF (50Hz - 250Hz) whereas HPF can only be activated with a switch which is fixed at 80Hz.
On the other hand the HU has HPF settings at Off - 80Hz - 120Hz - 160Hz. And no LPF settings, just some Subwoofer centre frequencies and levels (0-15) to play with.
My question is that can I use the LPF xover on the amp and the HPF xover on the HU? Or is it a case of using only one source (i.e. either HU or amp).