Hey guys.
Im in need of some help getting my car to a decent 140db number.
I have 2x12" DD512 subs running off a 2000w audiobank amp.2Gauge cable to the amp earth half a metre.Cable from subs is 8gauge.

Battery size is a 619 and 45amp alternator.
The box is built to spec for the DDs but the port is 5 inches shorter then spec.

Using a wharfedale dvd player for head unit and using usb for music.

Best reading from the car was a 138.7db SPL and 140.2db Bass box peak.
Bass box avg was 138.4dbs.

I would like to get the car to 145dbs spl and a 142db bass box.
The boot has been sound deadened aswell and that helped get the extra 2dbs to get the car doing the 140.2dbs.

Any advise will be taken thanks