What kind of car does he have? What box set-up is he/you using? All these things play into the set-up. Acoustics are different in each type of car. The same is true for box design. That being said even if you had the same system but in different ars they would sound a little diferent. Hope this helps.
i hate when that happens. my system is WAY better than my younger brothers circuit city special system. but because he's got a hatchback (VW golf) that doesn't rattle like a MOFO, his sounds like a 5000 dollar system.
i don't have any advice, just thought i'd sympathize.
GO PATS!!!
Sound deadener, plenty of it.
Bracing, sounddeadening or removing the read 6x9s.
Sound deaden the trunk.
And if all else fails, brace the trunk
