Is there a certain shape car that will have the better quality sound?

I mean like does a hatch give better quality sound than a sedan or is it all in what components you install rather than the shape of the car?
Simon
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CAR: 1994 Suzuki Swift GTi
ENGINE: G13B 1.3l Twin Cam 16 Valve
POWER: 90Kw
WEIGHT: 820Kg
HEAD UNIT/BRAINS: Sony head unit & 10stacker
REAR SPEAKERS: Explod Splits & Tweeters
SOUL OF SYSTEM: 2xPioneer 12"Diamond plate
E-MAIL: satans_scruds@hotmail.com

