E echo zulu Active member Joined Jul 8, 2012 Messages 35 Jun 14, 2020 #1 I'm searching for schematics for a "brown" Helios 3013 EQ/preamp module. It has hi/low pass filters, a 4 section EQ, insert switches and switchable Q. Anyone?
I'm searching for schematics for a "brown" Helios 3013 EQ/preamp module. It has hi/low pass filters, a 4 section EQ, insert switches and switchable Q. Anyone?
