PR604/ How to improve bass

Whilst I am delighted with the piano sounds of the PR604, I am disappointed with the lack of bass when using the rhythym unit,particularly after previously owning a Yamaha electronic organ.

I only use the piano for home use,but can anybody recommend any equipment that could be attached to the PR604 to improve the bass quality. (Not too expensive please.)

Russ, use the search link at the top of the pages and search for "logitech" and you will find quite a few threads on this forum as well as the "General Arranger Forum" on Logitech speaker systems people are using with their arranger keyboards. They sell reasonably priced speaker systems that would certainly add a lot of bottom end to your sound. You could probably look at one of the lower end systems if you are not using it for live gigs.