i have in the trunk of a grand marquis with a kx 1200.1 amp. i got 135
the guy i bought the sub sold the custom box for the DD. he said it was reading 144 dbs at 28hz.
mine was 135 at 48 hz.
he used to have the sub in a ford ranger, and mine is in a 00 grand marquis.
what factors play in getting such a big difference?
the guys that did my reading said that it would only be a bit wider.