rwf ... I replaced my factory speakers with Kenwood 6X8 2-way speakers for budgetary reasons. I also didn't want to replace them with anything special until I was ready to add an amp for them also. Right now, they are just running off the head unit. Sounds better, but not a huge difference without the aftermarket amp. My stereo was not the Sony system, though. It was the base sound system. I would not replace the Sony components either for the $$$.