I know the problem. I've ultimately come to the conclusion that a good sub installation and a rollbar are mutually exclusive in that car. So the Miata has a marginal sub installation (JL Microsub in the trunk) and a roll bar. The Coupe has a good sub (a pair of JL 8W3's in a custom cabinet) because it doesn't need a rollbar.

I've compensated for the marginal stereo in the Miata with a nice, loud exhaust.

-Zandr
Mk.I #150
Mk.II #39