Jade amps Jade amplifiers – an Australian manufacturer of amps since 1970.

“Started 1970. Still make amps in Melbourne.  Early models had Year/Month serial stickers or printed numbers of engraved numbers.

eg. 75322 would be MARCH 1975 No.22.

Since about early 80’s we stopped using serial numbers.” [Source: Joe Bonich, Jade Amps, email 13/10/2008]