I just recently sold my 12'' HDC3 in 2.25 cubes ported to 33hz. I am very seriously thinking of going to pick up an 03-05 XXX. Say i put the xxx in the recommened box tuned to 33hz as well, what differences am i looking at? I expect the xxx to sound much better, but what about loudness to the ear? Both subs will be powered by the same amp (sundown saz 1500)
