Briefly:
I am not using the synth as much as I should. I have sold my car over 18 months ago hence no use for Subwoofer. Deatils within auctions. Help yourselves:
Yamaha DX21 Synth
http://www.trademe.co.nz/Browse/Listing.aspx?id=198850460
Viberant 12" Subwoofer in Box
http://www.trademe.co.nz/Browse/Listing.aspx?id=198851683