does it go 'plek plek' at lower volume? If not then you need to lower you amplifier gain and your HU volume. You are sending distorted signal to your sub.
I'm deeply in love with skyline's sexy rear and its "come and get me"-like front... i've always dreamt of getting 1... but i haf no experience whuts so ever on buying a...
So the story goes like this...haven't been boosting for a while...then one day took the car out full boosting...and noticed the boost spiked. dammit. went up to 0.7,spiked back to 0.5... so i figure...what...