This is the little brother of our ZiRCONiA, an optical compressor using VTL5C3 (or similar) that is based on the Diamond®.
Featuring 1/8w resistors (or standing 1/4w) and a built-in charge pump for 18v operation, it fits into a 1590b enclosure.
The controls are:
VOLUME- Sets the output level.
EQ- This is a “tilt” style EQ that cuts bass as the treble is increased (CW) and conversely cuts treble as bass is increased (CCW). Set the control at noon for the same sound as EQ “off” on the ZiRCONiA.
COMP- Increases the amount of compression and sustain.