Listen Technologies ListenIR iDSP Assistive Listening System Pre-Configured IR Kit Level I | Standard
Listen Technologies ListenIR iDSP Assistive Listening System Pre-Configured IR Kit Level I | Standard
SoundPro Item: 72712 | Part Number: LS-90-01
Usually ships in 5-7 business days
- Pre-Configured Package Eliminates Field Programming And Reduces Installation Labor
- Infrared Transmission Prevents Eavesdropping And Eliminates Crosstalk Between Adjacent Spaces
- Intelligent DSP Processing Maintains Audio Clarity Across The Entire Coverage Area
- Integrated Neck Loop Lanyards Enable Direct Coupling With Telecoil-Equipped Hearing Devices
- Four-Port USB Charging Station Ensures Receiver Readiness Without Dedicated Charging Infrastructure
The ListenIR iDSP Level I System delivers turnkey assistive listening compliance for boardrooms, training facilities, courtrooms, and small theaters seating up to 50 occupants. Built around the LT-84 Transmitter/Radiator Combo, this package transmits clear infrared audio across 2,787 square meters without interference from RF sources or adjacent rooms. LR-4200-IR intelligent DSP receivers decode the signal with precision, while integrated neck loop lanyards ensure compatibility with T-coil hearing aids and cochlear implants.
Designed for single-channel applications, the system requires no custom programming or complex setup. The LA-423 4-port USB charger keeps receivers ready between events, and universal ear speakers provide immediate use for guests without telecoil-equipped devices. Integrators gain predictable coverage, venue managers achieve ADA compliance, and end users experience intelligible audio free from dropout or ambient noise intrusion.
Where competing systems require additional radiators or signal boosters to cover mid-sized spaces, this configuration provides complete coverage from a single transmitter position. The result is lower installed cost, simplified commissioning, and reliable performance across worship spaces, municipal facilities, and corporate environments.
- LT-84 Transmitter/Radiator
- Audio
- Frequency Response: 20 Hz - 20 kHz (+/- 1 dB) Line Input, 63 Hz - 15 kHz (+/- 3 dB) System Specification (wireless end-to-end with LR-4200)
- Signal-to-Noise Ratio: > 70 dB (SNR) Line Input, > 60 dB (SNR) System Specification (wireless end-to-end with LR-4200)
- Microphone Input: Two (2) 3.5 mm (0.14 in.) Tip/Sleeve connector, -30 dBu nominal input, +14 dB headroom, impedance 4.4k Ohms, 5 VDC bias supply
- Total Harmonic Distortion: < 0.1% (THD) Line Input, < 2% (THD) System Specification (wireless end-to-end with LR-4200)
- Unbalanced Line Input: Stereo/Mono Input. Two (2) Dual (RCA) Phono connectors, unbalanced, -10 dBu nominal input, +14 dB headroom, impedance 10k Ohms
- Balanced Line Input: Mono Input. Two (2) Phoenix Type connector, balanced, + 4 dBu nominal input, +14 dB headroom, impedance 100k Ohms
- Controls
- Power Switch: Three (3) position switch - Power OFF, Power ON-Indicator Lights OFF, Power ON-Indicator Lights ON
- Carrier Frequency Selection: Two (2), four (4) position rotary switches (2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz)
- Level Control Knob: Two (2) audio taper rotary potentiometer, counter-clockwise decreases input mix level, clockwise increases input mix level
- Indicators
- Power Supply LED: Green LED on in-line power supply indicates AC power is applied
- Audio Level Indicators: Two (2) Green LEDs, two (2) Red LEDs, Green LED indicates Audio presence and Red LED indicates peaks in the audio
- RJ-45 Amber LED: Solid Amber indicates carrier is present and IR is being transmitted
- RJ-45 Green LED: Solid Green indicates power is applied to unit, flashing indicates unit has entered power save mode
- RF
- Carrier Frequencies: 2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz, Selectable
- Number of Channels: Two (2) channels, Selectable carrier frequency
- Frequency Accuracy: +/- .005% stability 0 to 50 °C
- Transmitter Stability: 50 PPM
- Modulation: FM Wideband, ±50kHz deviation max, 50 ?S pre-emphasis
- Power Save Mode: Carrier will shut off when no audio is present for 15 minutes on both channels to preserve radiator life
- Expansion Link Output: Two (2) RJ-45 connectors - Provides RF Signal and Power, CAT-5e cable 24 AWG, 100 ft. maximum cable length, two (2) LA-141s per output connector
- IR
- Coverage Area: 2,787 m² (30,000 ft²) single channel with LR-4200-IR/LR-5200-IR receivers or 697 m² (7,500 ft²) single channel with LR-42/LR-44 receivers
- IR Emitter Power: 1.49W
- Power
- Power Supply Input: 100-240 VAC, 50-60 Hz
- Power Supply Output: 12 VDC, 4 A, 48 W
- Power Supply Connector: 2.5 mm ID barrel connector, center positive
- Power Output: Two (2) RJ-45 connectors. providing Power and RF signal for up to two (2) LA-141 expansion radiators on each output
- Power Supply Type: In-line switching mode power supply, Listen part number LA-210
- Power Supply Line Cord: IEC line cord, North America Type B (LT-84-01), Asia and UK Type G (LT-84-02), Euro Type F (LT-84-03), Australia Type I (LT-84-04)
- Physical
- Color: Black with White Silk Screening
- Unit Weight with Power Supply: 1.8 lbs (0.8 kg)
- Shipping Weight: 3.4 lbs (1.54 kg)
- Mounting: Can be mounted on a wall, ceiling, or table with provided hardware (screws and hollow wall anchors not provided). Optional LA-347 Wall Box Mounting Plate is available for mounting to a standard single gang electrical box.
- Dimensions (HxWxD): 1.5x10.7x4.1" (3.81x27.2x10.5cm)
- Unit Weight: 0.8 lbs (0.4 kg)
- Environmental
- Temperature - Operation: 14°F (-10°C) to +104°F (40°C)
- Temperature - Storage: -4°F (-20°C) to +122°F (50°C)
- Relative Humidity: 0 to 95% relative humidity, non-condensing
- Compliance
- Standards: FCC part 15, ICS-03, CE, UL, CUL, C-Tick, CCC, PSE, KC, GS, RoHS, WEEE
- Power Supply Compliance Marks: CUL, UL, CE, CCC, C-Tick, KC, PSE, GS, FCC, RoHS
- Audio
- LR-4200-IR Intelligent DSP IR Receiver
- Audio
- System Distortion: < 2% total harmonic distortion (THD) at 80% deviation
- Audio Output Jacks: Two (2) 3.5 mm (0.14") connectors, unbalanced, 0 dBu nominal output level, 16 mW maximum, impedance 32 ohm, accepts mono or stereo phone plug or LA-430 Intelligent Ear Phone/Neck Loop Lanyard
- System Frequency Response: 63 Hz - 15 kHz (±3 dB)
- System Signal to Noise Ratio: > 60 dB
- Controls
- User Controls: Power on/off and volume up/down
- Programming: Via software and USB port, Auto Seek, Jack Sense, Squelch, Auto Power, Auto Off, Stereo, Brightness, Channel Name
- Set-up Controls: Press and hold up/down volume buttons for 5 seconds to enterchannel adjust, use up/down to select channel
- Indicators
- Display: OLED - Channel designation, battery level, unit number, charging status, volume status
- LED: Flashes when batteries are low or to indicate charging, solid when fully charged
- RF
- Carrier Frequencies: 2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz
- Number of Channels: Four (4) selectable channels
- Frequency Accuracy: ± .005% stability 32 to 122 ºF (0 to 50 ºC)
- Modulation: FM Wideband, ±50 kHz deviation max, 50 uS de-emphasis
- IR
- Coverage Area: 30,000 ft² (2787 m²) single channel with LT-84/LA-141 or 40,000 ft² (3716 m²) single channel with LT-82/LA-140
- Squelch: Programmable in 20 steps, automatic on loss of IR signal
- Power Save Mode: Turns unit off after a specified time of no IR signal, default is 30 minutes
- Sensitivity: Better than one (1) nW/cm2 @40 dB SNR
- Power
- Power Supply: Micro USB connector, 5 V, 500 mA
- Battery Type: Lithium Ion
- Battery Life: 8 Hours of typical use
- Battery Charging Time: Fully charged in 2.5 Hours
- Physical
- Color: Flat Black
- Unit Weight with Batteries: 2.8 oz. (79.4 g)
- Shipping Weight: 3.5 oz. (99.2 g) with a 1 lbs. (0.45 kg) minimum
- Dimensions (HxWxD): 3.75x2x0.64" (9.6x5x1.7cm)
- Unit Weight: 1.9 oz. (53.9g)
- Dimensions with Belt Clip: 3.75x2x0.8" (9.6x5x2.1cm)
- Environmental
- Temperature - Operation: 14 to 104ºF (-10 to 40ºC)
- Temperature - Storage: (-)4 to 122°F (-20 to 50°C)
- Relative Humidity: 0 to 95% relative humidity, non-condensing
- Compliance Standards: FCC Part 15, ICS-03, CE, RoHS, WEEE, ADA 706, CBC 11B-706
- Audio
- LA-430 Integrated Neck Loop
- Interconnections
- Connection to Receiver: Male 3.5 mm (TRRS) to Male 3.5 mm (TRRS)
- Connection to Short Ear Phone: Female 3.5 mm (TRS)
- Loop
- Neck Loop Field Strength: 400 mA/m (+/- 3dB)
- Neck Loop Frequency Response: 100Hz to 5kHz (+/- 3 dB ref 1kHz)
- Physical
- Color: Black
- Shipping Weight: 1 lbs. (454 g)
- Cord Length: 29" (74 cm)
- Unit Weight: 1.5 oz. (43 g)
- Compliance Standards: RoHS, IEC60118-4
- Interconnections
- LA-401 Universal Ear Speaker
- Audio
- Frequency Response: 20 Hz - 20 kHz
- Impedance: 32 ohm +/- 15% @ 1 kHz
- Input Sensitivity: 115 dB +/- 4dB @ 1 kHz, 1 mW
- Rated Power Input: 50 mW
- Max Power Input: 100 mW
- Interconnections: Male 3.5 mm (TRS)
- Physical
- Color: Dark Gray
- Shipping Weight: 1 lbs (454g)
- Cable Length: 13" (33cm), extension cable is 28" (71 cm)
- Unit Weight: 0.4 oz (11g)
- Compliance Standards: RoHS
- Audio
- LA-423 USB Charger
- Power
- Power Supply Input: 100-240 V, 50-60 Hz, 0.5 A
- Power Supply Output: 5.0 VDC, 4.2 A
- Physical
- Color: Black
- Shipping Weight: 1 lbs. (454g)
- Cable Length: 36" (92cm)
- Cable Type: 4 - USB to Micro USB Cables (LA-422)
- Dimensions (HxWxD): 2.44x2.9x1.13" (62x74x29mm)
- Unit Weight: 7.8 oz (221g)
- Compliance Standards: UL, FCC, RoHS, CE. RCM
- Power
- LA-304 Signage Kit
- Shipping Weight: 1 lb (0.5 kg)
- Weight 6 oz. (170 g)
- Dimensions Hard Plaque: 7x10” (178x254 mm); Soft Cling: 7x10” (178x254 mm)
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