So when people do the sub relo, why does everyone (seem to) re-use the sub speaker that came with the car?
The Mac sub has been designed and engineered to work within the system - the sound is great. Change the sub and who knows how the sound quality might be effected. Seems that an aftermarket 'tube' type would be easier to fit behind the rear seat w/o custom cases, etc.
Because most subs are far larger. A few powered units are close in size and workable but then there's new wiring to deal with and questionable sound quality. This is as close to an OEM solution as you can get (in fact anyone that's seen the system believes that it is OEM). I presume that the amp has to be preserved - because it runs all the speakers (?) but that seems more straightforward. Surely it can't be for the sound quality. There's too much other sweet DOHC music going on in there to really matter.
So, on a scale of 1 to 10 where 10 is 'a complete nutcase', how confused am I?