Discussion in 'Headphones' started by pepper, Oct 12, 2017 at 5:11 PM.
Hello I can't seem to find any info on these any help greatly appreciated.
You might try contacting Koss.
It has scanned and emailed old literature to people in the past.
Those are from the late 1980s, so the literature should be available in its archives even if nobody else has it.
Separate names with a comma.