It sounds like, in your particular situation, with your particular requirements, an FM modulator is the way to go. That way, you can still use your factory stereo to power the speakers. This is covered in the FAQ section of riocar.org.

Your other options are:

- Replace the factory stereo completely with the empeg, adding an amp.

- Replace the factory head unit with an aftermarket head unit that's got Aux-ins and will power your factory speakers.

It's up to you. Make sure to read through the FAQ at www.riocar.org , especially the installation section.