[jiminn]

Can you hook up 4 speakers to the stock system
2879248 Audio System

 

[Toxic-21]

Yes you can.
In the OEM wiring harness for the radio, there is a dead weather pac plug.
You need to purchase the correct pins and seals for the gauge wire you want to use, and insert them into the plug (already there). Run the 4 wires to your speakers (crimp spade connectors or solder to speakers) and your ready to go.

 

[jiminn]

Sweet time to start shopping for two more speakers and mounting enclosures

 

[RiverRunner]

How about RCA's for a amp or subwoofer?

 

[Trippin]

Yes has rca's for amp. I'm running factory radio with amp, sub, and wake tower speakers. Works great

 

[Toxic-21]

The Polaris radio is derived from the Infinity PRV 250.
If you have not purchased the Polaris radio/head unit, I would purchase the Infinity brand. The infinity has a few more features than the Polaris version and is cheaper (will have to do some wiring).
The Infinity brand will fit in the same location.