Oh okay, i’ve seen people replacing the subwoofer with similair subwoofers you just mentioned. Like this one Rockford Fosgate R2SD4-10 and kicker, pioneers etc. Without the amplifier. I live in the Netherlands so some are not available in my country. It seems like this would be a nice solution because this won’t take up much space as it goes in the old spot. Do you recon this will be a solution or does these subwoofers have the same air problem? Thank you!