I have this set from.Unisonic .XL990 2 incher and and the XL980 3 incher with cassette recorder silver case version which I got for 1980 Christmas from my late dad. I never heard of Unisonix.I have the manuals here somewhere or both sets..Also have their 5incher set here somewhere.
The Ratshack had their version of the XL990 around the same time.
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