Upgrading sound system in 991.1 GT3

[evilandy]

Hi all,

I want to upgrade the sound system in my 991.1 GT3 as I find I use it more of a GT car than a track monster. I opted for the updated system when I optioned the car (Bose was not available) but it still sounds weak. Wondering if anyone has done anything similar and has any advice?

Cheers,

Andy