FS-1 IS COMPATIBLE WITH:
-CRUSH 20 CRUSH 20RT & CRUSH 35RT (CHANNEL)
-CRUSH PRO SERIES (CHANNEL OR REVERB)
-TH30 AND TH100 (CHANNEL)
-DUAL TERROR (CHANNEL)
-AD30 (CHANNEL)
-OR 50 (MASTER VOLUME DEFEAT)
-CUSTOM SHOP 50 (EQ LIFT NOTE: THE LED WILL NOT ILLUMINATE AS THE CUSTOM SHOP -USES PASSIVE SWITCHING CIRCUITRY)
-ROCKERVERB (REVERB OR CHANNEL)
-DUAL DARK (CHANNEL OR ATTENUATOR)
-OB1-300 & OB1-500 (BLEND CONTROL)