Williams Sound MOD 232 2-Channel Infrared Modulator, 2.3 / 2.8 / 3.3 / 3.8 MHz


Williams Sound MOD 2322-Channel Infrared Modulator, 2.3 / 2.8 / 3.3 / 3.8 MHz


Part of the Williams Sound SoundPlus® Infrared Listening System lineup, the MOD 232 Modulator is designed to work with the TX9 emitter operating on 2.3/2.8/3.3/3.8 MHz frequencies. Each microprocessor-controlled MOD 232 can handle up to 2 audio channels. Baseband outputs can daisy-chain 2 units (additional units sold separately) together for 4-channel operation. It features flexible combination jacks which permit balanced/unbalanced line-level inputs. For stable frequency control, carrier frequencies are controlled by the microprocessor and a frequency synthesizer.

SoundPlus® Infrared Listening System Overview

This system consists of a MOD 232 Modulator(s) and one or more TX9 Emitters which employ invisible infrared (IR) light to broadcast speech or music to wireless infrared receivers. It’s designed to transmit high-quality audio for hearing assistance and language translation applications. Because the system uses infrared light for transmission, it’s not affected by interference from radio equipment and does not interfere with radio equipment. And no FCC license or radio approval is required. It can be used with microphones as a stand-alone system, or can be connected to other sound equipment. Please note: infrared systems generally cannot be used in direct sunlight because of sunlight’s large amount of interfering infrared light.


  • Switchable 2.3/2.8/3.3/3.8 MHz frequencies
  • Accepts mic and line inputs
  • Adjustable volume control
  • 5-year warranty (90 days on accessories)

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