Used the serial dating decoder, and came up with December 1994.
The unit with serial number GG90905 was produced December 1994. The unit is number 70905
Is this going to be MIJ and/or big chip?
I know what the bossarea page for the DD-3 says that there are 3 different versions, but it doesnt really describe sound quality and things of that nature.
G'day! From 1994 it won't be "long chip". All DD-3's sonud OK, but the long-chip ones implement the AD-DA conversion diffferently so many think they sound "better" (I know I do!)