Just got a new battery for this little beast, it still works like a charm with all my saves intact, even though it hasn't been switched on for around 10 years! :
4312 - JBL 4312 - Audiofanzine
JBL 4312 MKII Studio Monitor
JBL 4312 Floorstanding Speakers user reviews : 4.6 out of 5 - 43 reviews - audioreview.com