Hey Armand,
I am about to invest in a sound system for my Z, and will be going the MSA speaker box route but with no speakers in the doors, same as Datsun723s original plan. You seem to know a bit about car sound and I thought I might ask you whether combining the 2 rear 6x9s with the Retrosound head unit (its the original looking one that MSA sells under Radio and MP3 kits) would in your opinion produce a good sound system. Would I need to consider anything else past the box, the sound system and the speakers if I went that route ie, sound deadening, amplifying, rattle, etc. I've never modified a car sound system before and would appreciate any advice you have.
Thanks,
Steve