Transistor Ring Modulator

Ring modulation is a classical method of coloring a timbre using two different signals.

The standart (AC/DC) precisely designed transistor ring modulator.
This device multiplies two incoming signals, which gives a special timbre coloration to the sound.
At the heart of device is the strong transistor schematic which have maximum analogue sound.

Transistor sound
AC and DC modes
The panel is made of 1.5 mm thick aluminum (2mm in new models)
Size – 4hp

http://o3audio.com/shop/ring-modulator/