Recent content by falkirk

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Hi All, 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...