The Williams Sound MOD 232 is a professional two-channel infrared (IR) modulator designed to serve as the central transmission hub for infrared assisted listening systems in public venues. This unit converts audio signals from one or two separate sources into modulated infrared light, which is then broadcast via IR emitter panels to receivers used by audience members. It is a critical component for providing clear, confidential, and interference-free audio to individuals with hearing loss in environments such as theaters, courtrooms, houses of worship, museums, and performing arts centers. The MOD 232 features independent processing for each channel, allowing it to broadcast two different audio programs simultaneously—for instance, the main program audio on one channel and a language translation on the second channel—enabling users to select their desired audio stream via their personal receiver.

The modulator employs advanced frequency modulation (FM) on a carrier frequency within the infrared spectrum to ensure high-fidelity audio transmission that is immune to RF interference and completely contained within the room, addressing privacy and security concerns. The unit is engineered for reliability and ease of integration into existing audio systems, featuring balanced XLR and unbalanced RCA inputs with independent level controls for each channel to accommodate various source equipment. It also includes essential monitoring outputs and status indicators for both channels, allowing system operators to verify signal presence and audio levels during operation, ensuring consistent and reliable performance.

Housed in a standard 1U rack-mountable chassis, the MOD 232 is built for permanent installation in equipment racks. Its robust design is intended for continuous operation, making it a dependable cornerstone of an infrared assistive listening system. By providing a secure, high-quality wireless audio link, the MOD 232 helps venues comply with accessibility regulations like the Americans with Disabilities Act (ADA) while offering all patrons an enhanced and inclusive auditory experience. Its dual-channel capability adds significant versatility, enabling sophisticated audio distribution solutions within a single, compact unit.