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Don't think it's large enough space. Once you remove the cover, you will get better idea of space to work with. I read somewhere that the headliner speakers were 2.5 ohm, not sure how correct that is, but thinking they may be regulated by Amp to put out less power, just seems odd they are much quieter than rest. Kind of like the center speaker has more output than the side dash speakers. I am in dire need of finishing up the sound deadening, can hear the metal hollow sound when bass hits certain notes. Been busy with wife's car replacing some things, brake switch etc and haven't had time. Plus in few weeks going camping for 8 days in Oregon River rafting. Since adding the Soundqubed Amp, really like the sound now, minus need for sound deadening. Those 3.5 jbl gto 329 3.5s are a great deal now 39.00 on Amazon, are 3ohm, 92 sensitivity, better carbon material and silk tweeter(compared to the Gx302 2.3ohm, textile tweeter and poly come and think 88db sensitivity) sound might be slightly smoother with the gto 329, has slightly better freq response too, but I am happy enough now, no need to spend money trying new speakers and having to cut dash holes to fit. Now the jbl Gto 20m might be great in the headliner, 2.0 inch, 2.5 ohm(jbl site says 2ohm, Crutchfield says 2.5 ohm) , but only way I would try is if I found a open box item for cheap, they cost around $110 now.
I’m down to the wire. Literally!
I bought a 1/2” spacer for the alpine but it still vibrated badly!
Are you thinking of running front and headliner tweeters together on the same amp channel? I wouldn’t do it as you’ll almost definitely want the ability to set their levels separately. Two real tweeters (not the factory Alpine crap) that close to my head would make me wish for a quick death.
Just brainstorming. But... point taken! Lol
