Here are the detailed measurements of the stock Alpine door speakers:
Door: 6x9" speakers with a 2.0 ohm rating (2 1/2" depth)
The front speakers have a midrange only, crossover affected frequency range. No high frequencies.
The rear speakers have a full range signal.
For removal of the speakers, the door panel has to be removed. This is easily accomplished by:
- Prying open the little circle inside of the door handle and removing the phillips head screw. Also gently pry out the plastic handle cover.
- Then remove the plastic screws and retainers from around the door panel with a Torx 20 tool.
- Remove the sail panel above the door panel, by the mirror. Just gently pry as it's held in by clips only.
- Gently pull the door panel outwards and then up. Before the panel will come off, release the wiring harness from underneath the switch panel while it's still in the panel. There's no need to remove it. Finally, lift the panel over the door lock pull and set aside.
The speaker is held in place by four bolts which can be removed with a 3/16" socket.
For ease of replacement, use Crutchfield harness #12071050 on all of these speakers.