Q3 Other/unknown 500 Series

Induction Coil EQ

Coil EQ based on vintage EQs from the golden age
A stunning combination of over 10,000 tonal variations
Lets you color your sound with warmth and detail
Works with Workhorse and all 500 series power racks

http://www.radialeng.com/q3.php

No info about availability.

$700
1 Slot Equalizer