My Seat Ibiza 6J(Pre facelift) fitted with a Pioneer TS-WX300A Subwoofer(Cables are in temporary position until permanent placement). Gain is at 50%, volume is at 50% as well
The car has many sound absorbing/sound blocking materials, it's not a typical Seat Ibiza, I'm estimating the total mass of soundproof materials to be around 25KG and that's the reason it's so quiet when all doors are closed
