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The Williams Sound IR SY4 is a SoundPlus medium-area wireless infrared system designed to deliver reliable audio monitoring for up to five people in conferences, classrooms, assisted living facilities, and more. It includes the IR T2 infrared transmitter and its power supply, five WIR RX18 two-channel stethoset IR receivers, one charger with five slots, a wall/ceiling mount, and an ADA wall plaque. With a coverage area of up to 18,000 square feet and selectable transmission frequencies, it provides a blend of easy setup and robust power.
Audio inputs to the transmitter include two Euroblock line inputs and a 3.5mm microphone input. An additional Euroblock is provided for control system integration. Back-panel green and yellow LEDs indicate power status and signal presence. A power-saving mode automatically shuts off the carrier after 12 minutes without audio.
The supplied IR receivers feature under-the-chin style, low mass, and an easy-to-clean design. They have on/off controls built into their arms and recharge in the five-slot charger, which utilizes red LEDs to indicate charging status. A full charge yields up to seven hours of operating time.
- Ideal for assistive listening and language interpretation in commercial spaces such as conference rooms, assisted living facilities, small cinemas/theaters, classrooms, and courtrooms
- Wall-/ceiling-mountable compact transmitter with a maximum coverage area of 18,000 ft²
- Power-saving mode automatically shuts off the carrier after 12 minutes without audio
- Power and audio indicators on transmitter, charging indicators on charger
- 3.5mm microphone input with channel selector and dedicated gain knob
- Two Euroblock line inputs accept balanced or unbalanced signal
- Receivers support 2.3/2.8 MHz or stereo operation and offer a closed-ear design with comfortable eartips
Features
- 1 x IR T2 Medium-Area IR Transmitter
- 5 x 2-Channel Stethoset IR Receivers
- 1 x 5-Slot Charger
- Includes Wall/Ceiling Mount & ADA Plaque
- Includes Power Supply
- Coverage Area up to 18,000 ft²
- Automatic Power-Saving Mode
- Power, Charging & Audio Indicators
Specifications
Williams Sound IR SY4 Specs
| Coverage Area | Up to 18,000 ft² / 1673 m² in single-channel mode with the RX22-4 receiver |
| Transmission Frequencies | 2.3, 2.8, 3.3, and 3.8 MHz |
| Modulation | FM wideband |
| Pre-Emphasis | 50 µS |
| Deviation | ±50 kHz |
| Inputs | 2 x Euroblock line inputs (balanced/unbalanced) 1 x 1/8" / 3.5 mm microphone input |
| Control | 1 x Euroblock (Ground, Tx, Rx) |
| Frequency Response | Line Inputs: 95 Hz to 17.6 kHz, -3 dB re 1 kHz Mic Input: 125 Hz to 17 kHz, -3 dB re 1 kHz |
| Signal-to-Noise Ratio (SNR) | 70 dB (line input) |
| Operating Temperature | 32 to 122°F / 0 to 50°C |
| Indicators | Audio: Yellow LED per channel Power: Green LED |
| Power Requirement | DC Power Input: 2.1 mm ID barrel connector, 48 VDC, 0.2 A, center positive Power Supply Input: 100 to 240 VAC, 50/60 Hz, 18 W |
| Power Save Mode | Carrier shuts off after 12 minutes without audio |
| Dimensions | 9.0 x 3.8 x 1.4" / 229 x 97 x 36 mm |
| Weight | 0.8 lb / 0.4 kg |
| Approvals and Compliance | CE, FCC, Industry Canada, WEEE, RoHS, CB Scheme, RCM, and PSE |
| Operating Range | Up to 3063 ft² / 285 m² with the TX9 emitter or TX90 transmitter in single-channel mode Up to 1000 ft² / 93 m² with the TX75 in single-channel mode |
| IR Carrier Modulation Frequency | 2.3/2.8 MHz or stereo |
| Frequency Response | 200 Hz to 8 kHz (±5 dB) |
| Signal-to-Noise Ratio (SNR) | 60 dB at 32.8' / 10 m |
| Max Acoustic Output | 120 dB SSPL90 with 2cc coupler |
| Ear Pads | EAR 240 silicone eartips |
| Battery Type | BAT AP11A NiMH battery pack |
| Battery Life (approx.) | Up to 7 hours |
| Construction Material | ABS plastic |
| Weight | 2 oz / 56 g (including battery) |
| Approvals | CE, RoHS |
| Slots | 5 |
| Indicators | Red LED charging indicators |
| Power Requirement | Power Supply: 100 to 240 VAC, 12 VDC TFP 043 Power Supply Input: 120 VAC |
| Construction Material | Metal and plastic |
| Dimensions | 12.0 x 6.3 x 1.5" / 304.8 x 158.8 x 38.1 mm |
| Weight | 1 lb / 0.5 kg (excluding power supply) |
| Approvals | WEEE, RoHS |
