Commercial-grade large-area infrared transmitter system with array

The Williams AV IR SY23 D is a commercial-grade, large-area Dante infrared audio system built around an IR+ transmitter and array with stethoset receivers. Designed for ADA and IBC audio compliance, it combines broad infrared coverage with rack-mounted audio processing, receiver monitoring, web-based configuration, and diagnostic tools. Published system coverage reaches up to 18,000 square feet in single-channel mode.

Ideal Use Cases

This system is intended for large-area installations that require compliant audio distribution through infrared receivers. Its coverage specification, selectable carrier frequencies, and stethoset receiver format support projects where managed listening coverage and individual volume control are required. Receiver specifications list compatibility with 2.3 MHz and 2.8 MHz infrared transmitters, plus a three-position selection switch for 2.3 MHz, 2.8 MHz, or stereo operation. The system is specifically identified for ADA and IBC audio compliance.

Why Choose This Model

The IR SY23 D brings input flexibility and signal processing together in a single-rack-unit modulator. Two combination three-pin XLR and 1/4-inch TRS inputs accept balanced or unbalanced line-level signals, as well as balanced or unbalanced microphone signals with selectable phantom power. DSP-based processing provides 1:1, 1.5:1, or 2:1 compression, along with adjustable high-pass and low-pass filter frequencies. Front-panel 1/4-inch headphone outputs allow separate monitoring of Channel A and Channel B inputs. The listed 67 dB typical signal-to-noise ratio and electrical frequency response of 40 Hz to 16,000 Hz provide concrete performance references for system design.

Installation and Integration

The modulator measures 19 inches wide by 1.75 inches high by 8.2 inches deep and weighs 5.2 pounds. Its single-rack-unit format supports integration into an equipment rack. Four RJ-45 emitter output ports use CAT5e cabling to provide +48 VDC power, RS-485 communication, and baseband signals for infrared transmission. The array receives its 48 VDC power from the IR M1 through the same CAT5e connection, consolidating the required power, communication, and signal paths.

Remote configuration is available through an embedded website. An international desktop power supply accepts 110-240 VAC at 50-60 Hz and supplies +48 VDC at 0.75 A through a center-positive output. Specified operating conditions are 0-50°C in a non-condensing, non-corrosive atmosphere. The product title identifies this as a Dante system, while the supplied technical data separately lists Dante as optional.

Performance Highlights

The transmitter uses FM wideband modulation with +50 kHz deviation and 50 µs pre-emphasis. Carrier frequencies are selectable between 2.3/2.8 MHz or 3.3/3.8 MHz. Total harmonic distortion is specified at less than 2 percent for the electrical response. Coverage is rated at up to 18,000 square feet in single-channel mode. Separate receiver data lists a range of up to 15,000 square feet in single-channel mode when used with an IR T2 transmitter.

The stethoset receiver specifications include an eight-hour LiPo battery life, a volume-control thumbwheel, an on/off power slider, a 3.5 mm stereo headphone jack, and a maximum acoustic output of 120 dB SSPL90 with a 2 cc coupler. Charging data identifies the CHG 520 charger, five-unit capacity, 120 VAC input, and individual red LED charging indicators.

What Makes It Different

Integrated setup and diagnostic functions reduce dependence on separate test sources. A selectable internal 400 Hz test tone can serve as an audio input during setup and diagnostics. Dual infrared test LEDs support receiver testing, monitoring, and audio-signal testing. An adjustable auto carrier shut-off timer turns off the carrier when no audio is present and can be configured through the web interface. The system carries CE, FCC, RoHS, RCM, WEEE, CB Scheme, ISED, and VCCI approvals.

Final Assessment

The IR SY23 D combines large-area infrared coverage, stethoset receiver operation, DSP-based audio control, CAT5e-connected emitter outputs, and embedded-web configuration in a rack-mountable system. Its selectable carriers, dedicated monitoring outputs, internal diagnostics, and published compliance purpose make it a clearly specified option for projects requiring commercial infrared audio distribution for ADA and IBC applications.