HIWATT Echo Theremin fun! Rare, short-lived, awesome mini theremin I've owned since they first came out in the early 2000's. Really cool and unique... | By Enfield Studios, Lessons & Repairs -
Hiwatt Echo-theremin - YouTube
Used Hiwatt Amplifiers & Effects | Musician's Friend
Hiwatt and Echo Units | Guitar effects pedals, Guitar gear, Pedalboard