yes you can...you will need to get an rca converter so you will have a audio signal running to your amp. Or you could splice the signal off your rear speakers (i do not recommend).
i have a bazooka bass tube connected to the stock rear speakers, with the built in amp. does not take a lot of space, is easily removeable, and pretty light.
CelicaHobby.com is an independent Toyota Celica enthusiast website. CelicaHobby.com is not sponsored by or affiliated with Toyota Motor Sales, USA, Inc. in any way. The Toyota and Celica names and logos are trademarks owned by Toyota Motor Sales, USA, Inc.