I just installed an alpine HU into my contour svt and mb quartz in the rear doors. When i turn the volume up, the lights on the deck and interior dim when the bass hits. No amp or subs yet, but its most likely going to get worse when i do get them. Why is this happening already and what can I do to fix it? Thanks.

AIM...BKapp17 98 T-red SVT Steeda Gutted Pre-cats, no resonator Painted Dash Angel Eye Fogs Painted Chrome ring / headlights Looking for a t-red pre98 trunk lid