Hi I am wondering if this is possible:

I have a KORG PS60 synth and a KORG SP250 stage piano. The synth has no built in speakers but the stage piano does. I want to link up the two (I have MIDI cables) so that when I play the synth it outputs through the stage piano's speakers.

I have played around with it for a while and all I can do is get the synth to sound (through headphones) when playing the stage piano keys, or vice versa. I want the synth sound to be outputted through the stage piano's speakers.

The stage piano does not have a line in port (which would have been the easiest option).

Can someone advise me if this is possible, and if so, how to achieve it? Do I need an external box or something? Thanks a lot.

[This message has been edited by davebrackett (edited 11-02-2010).]