Sundown Audio Zv4 15“ bottom’s out suspension! 100hz-1hz sweep free-air

Sundown Audio Zv4 15“ bottoming out suspension 100hz-1hz sweep free air So you think you got lows? Check this out: All tones i made in Audacity, 10hz 15hz, 20hz, 25hz, then shut it off at 30hz. All on my Sundown Zv4 15’s. My own system: 1999 Subaru Impreza, stock engine and drivetrain, Custom black and red exterior paint and body work with fender flairs, 320 amp Bilitech alternator, 1 run of KnuKonceptz 0 gauge to the back and a ground run, Custom interior with bl