I would venture to guess that the result of the cutout diameter being less than the diameter of the 8 inch driver's actual moving cone probably 7.3 inches the waveform coming from the driver will rattle or move the rear deck carpet or board causing vibration like sounds.
Anyway I have succumbed for the need for some more bass and midbass via the front doors. Currently I have pioneer's 6X8 plate tsp682
installed there and am looking to put not some real 6X8 there which exists in the back doors which did not satisfy my bass needs (reasoning for adding a rear deck mounted woofer) but possibly to put some 6X9 there using an 1.5 adaptor for magnet space.
Though we are talking enclosures here has anyone installed a small enclosure in the OEM cutout space for a 5.25 sized driver sort of like a q-form for the door area instead of the door kick or foot well area?
