[urban_legend]

The speaker grill has two parts - one looks like it should be over a seperate tweeter but when you remove the grill there is no seperate tweeter.

Two main ways to replace the speaker:
- use the special speaker bracket sold on EBAY
- or do as I did and just use the existing speaker basket. You will need to cut out the OEM speaker and just use the plastic. The plastic basket (now a plastic ring) can then just be screwed back into the speaker grill keeping the proper speaker orientation.

You will want to use a 4" speaker that you can break the mounting tabs off - you won't need them and they will just be in the way. External dimension should be less than 105mm to fit back into the plastic ring. The Kappa 42.9I (2-way) were 100mm external and were just a few mm shy of a perfect fit..so I needed to add a gasket to tighen them up.

Regardless of the method choosen you will need to use a 4" speaker otherwise it will not mount to the speaker grill. Also keep an eye on the speaker depth - for a good reference see the Polk 4" dB dimensions they will fit fine.