With my car being a non-Bose GTR, I wanted a similar speaker configuration to the Bose equipped models. The non-Bose cars come without rear speakers – not even the rear grills, and no centre speaker in the dash.
I’ve asked Andy at R35 Audio to install some nice coaxial 4″ Hertz speakers in the rear parcel shelf and an awesome Hertz HL70 Centre speaker using a custom spacer to fit the stock location. An addition 4-channel amplifier has been installed to increase my amp tally to three.
The little 2-channel stock non-Bose amplifier has been completely removed now and over 1000w has been it’s replacement. It’s sounding fairly awesome!!