[movingzachb]

I have bit of an old school setup in an '99 Miata. It is a simple install right now.
Ecipse 8052 HU
MB Quart PCE 216 components in stock locations.
Sound stream 2.370 100x2 Amp - (China made, not the original).

I've been turning it off and on to get it to my best liking, but wonder what it could sound like if I bi-amplified them, added a couple speakers in the rear, another set of 6.5" in the rear.

The Miata doesn't have any other speaker (stock) speaker locations other than the front stage - but I can cut into the rear deck on the left and right side to fit an 6.5 to even an 8" speaker on both sides behind the seats.

I have never had a sub but it seems these speakers want one some how. Some rear fill would be nice.

 

[miniSQ]

i would choose an 8" sub over rear fill.

 

[YukonXL04]

The last miata I did we did infinity kapa components up front and 2 10's in the trunk. Didn't sound to bad but would have definitely rather had the subs in the cabin. But the kappas did great up front.