These cars are tricky for acoustics. I’ve tried a few configurations. Pretty early on I moved my tweeters onto little stands which allow them to peek up over the dashboard rail.
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I like the sound stage I get from them.
I experimented with putting them below the rail and facing forward so the sound reflected off the wood. That hid them pretty well but the clarity wasn’t very good. Maybe I just executed it poorly?
I have had various 5.25” drivers on each side in the footwell for most of the last decade. The mid bass wasn’t excellent and there seemed to be a kind of metallic standing wave that would pop in the vocals at (maybe?) the 1khz range. I’d like to know if you’re having success with yours.
I recently added 6.5” drivers to the doors and it has really made a difference. I’m not sure how I’ll reupholster the door cards to accommodate the speakers, particularly the map pockets, but I’ll figure something out that doesn’t compromise the aesthetics too bad. I didn’t have to cut any metal out of the doors to do it at least.
Lastly I have a 10” subwoofer in a custom, properly-sized box in the center of the rear parcel shelf and the bass is terrific. (I don’t have rear speakers back there.) All of the above with a head unit that can do a little bit of time alignment has ended up being good enough. If the vocals and bass guitars are centered and natural sounding I’m a happy guy.