Non monsoon speakers replacement
It would not be a good idea to install hatch speakers in that base setup because it would put full-range speakers behind you in both the sail panels and the hatch area causing the sound stage to be much too far back. It would sound like the old days when everyone was putting 6x9s in their parcel shelf at the back of the car. The Monsoon system avoided that by putting only subs (non-directional) in the sail panels and adding small hatch speakers merely for rear fill.
many people go full range in the sails on the 4-speaker setup, but I wouldn't even suggest that, it's just to strong. find you some cheap midrange 8 ohm speakers to throw in there, as that is as close to the stock setup as you can get.
if it's just the sails then you can get the bazookas for like 100 bucks, anything cheaper is CRAP or has the wrong number of voice coils.






