The Sennheiser SI 1015 Dual Modulator can radiate at both 2.3 and 2.8MHz for reliable operation and can drive both the SZI 1015 (medium area) and SZI 1029 (large area) emitter panels. The SI 1015 avoids interference from electronically-ballasted fluorescent lights with its strong sub-carrier frequencies.

Modulator for the carrier frequencies 2.3 and 2.8MHz

Single-channel, two-channel or stereo operation, features monitoring diodes and a separate barrier strip with RF and DC outputs for connecting radiators