Analogue Systems RS-20 Ring Mod / Multiple 1998

This module contains an analog high-quality ring modulator and a 1x4 multiples

AC-coupled ring modulator, based around the AD633 multiplier IC. The original frequencies are suppressed and you can hear only the sum of the frequencies (X + Y) and the difference (X-Y).

The ring modualtor works very clean. If only one signal is connected you won´t hear anything at the output. That is not the case with most ring mods as often you hear a bleed through.

Mild decal wear and tape residue due to age. Other than that works great.