Farfisa's product line included Amplifiers, and outboard effects. Here is the Farfisa TR-60, one of their combo ampA lot of farfisa included "Echo" and "Reverb" effects. They also offered a seperate Reverb unit, the "FAR-C".

Here is a sound clip of a Farfisa Compact played through a Farfisa F/AR-c Outboard Reverb Unit. The song is "That's My Weakness Now" by Green/Stept, from the Lenny Dee lp "Dee-lerious hi-fi organ solos with a beat!" as prefomed by "The Reverend Angus Strychn"