Hey mate, g'day from WA...just wanted to say cheers for the walkthrough. I knew this mod existed but was too lazy so was just using the data cd and CD out line in hack. Totally worth doing - Massive difference in volume , at least fivefold. would not be out of place hooked up to a TV for movies or gaming.
I love this unit - Back in 1991 i saved up my hard earned from my part time job and added birthday / christmas cash and bought the 680 brand new when i was 11 years old. It was around $500 if i recall- a lot of coin for a young fella even without inflation. It has pretty much always been in use since - probably the best value purchase ive ever made - most recently as a kitchen/backroom radio.
Ive had so many good times with this unit - its been with me through every music phase ive been through, as well as a TV sound system for a few years. The mod has sparked my interest in it yet again - im now thinking of rigging a rechargeable 7AH SLA motorbike battery to really trick it out!
Anyone out there who comes across this unit on the cheap, dont hesitate. After nearly 30 years of thrashing, the CD / radio / all buttons / RC work perfect. One Tape deck works ok, one has seized up, but im pretty sure if i ripped them apart and oiled them up theyd be fine too.
Thanks again mate