The DOEPFER A-114 DUAL RINGMODULATOR is a Eurorack module equipped with two Ring-Modulators. The modulator outputs a product of the multiplication of the input signal X Y. It is similar to a VCA, the difference is that the VCA responds only to positive input signals (multiplication 2 quadrants) and the Ringmodulator both negative and positive (multiplication 4 quadrants). Size 4 hp.