Listen Technologies iDSP Advanced Stationary RF System For ADA Compliance Level I | 72 MHz | Standard
Listen Technologies iDSP Advanced Stationary RF System For ADA Compliance Level I | 72 MHz | Standard
SoundPro Item: 28446 | Part Number: LS-56-072
Usually ships in 5-7 business days
- DSP Noise Reduction Technology Cuts Background Hiss By 20 Decibels Compared To Standard RF Receivers
- Integrated Neck Loop With DSP Loop Driver Enhances Listening Clarity For T-Coil Hearing Aid Users
- Compact Receiver Design Simplifies Staff Dispensing Workflows And Improves User Comfort During Wear
- Rechargeable Lithium-Ion Batteries Eliminate Disposable Battery Expense And Recharge In 2.5 Hours
- Complete Compliance Signage Kit Meets ADA Notification Requirements For Public Venues
Designed for houses of worship, performing arts centers, and public assembly spaces requiring ADA compliance, this system delivers multi-channel RF assistive listening with integrated DSP noise reduction that cuts background hiss by 20 dB compared to conventional receivers. The complete package includes transmitter, telescoping antenna, four rechargeable multi-channel receivers, ear speakers, neck loops with T-coil drivers, USB charging hub, and compliance signage—everything needed for immediate deployment.
The rechargeable lithium-ion batteries in each receiver eliminate disposable battery costs and recharge fully in under three hours, while multi-channel capability supports language interpretation or alternate audio feeds. Compact receiver form factor simplifies dispensing, storage, and maintenance workflows for staff while improving comfort for end users during extended wear.
Ideal for venues seeking a reliable, regulation-compliant solution that balances audio performance, operational efficiency, and total cost of ownership without requiring extensive infrastructure changes.
Downloads
Downloads
- LT-800-072-01 72MHz Stationary RF Transmitter
- Audio
- Frequency Response: 50 Hz - 15 kHz (±3 dB)
- Signal-to-Noise Ratio: SQ enabled 80 dB, SQ disabled 60 dB
- Audio Input 1: Rear panel, one (1) Female XLR or 1/4 in combo connector, balanced, 0 / -55 dBu (line/mic) nominal input level adjustable, +21 / -30 dBu (line/mic) maximum input level, impedance 20k / 1k ohm (line/mic), phantom power +12 VDC
- Audio Input 2: Rear panel, two (2) phono connectors, unbalanced, -10 / +10 dBu nominal input level adjustable, +30 dBu maximum, impedance 100k ohm
- Audio Processing: Compression can be turned on/off, slope internally adjustable from 1:1 to 4:1, default 2:1
- Contour: Cuts and boosts frequencies above 5 kHz
- Distortion: < 2% total harmonic distortion (THD) at 80% deviation
- Audio Output: Input 1 and input 2, mixed output (rear panel), two (2) phono connectors, unbalanced, -10 dBu nominal output level, +15 dBu maximum, impedance 10 ohm
- Headphone Output: Front panel, one (1) 3.5 mm (0.14 in.) stereo connector, unbalanced, adjustable output level, +3 dBu maximum, impedance 10 ohm
- Controls
- User Controls: Front Panel: Power, test tone on/off, channel up/down, input levels, mix level, contour, monitor volume controlRear Panel: Input 1 Level, (Line, Mic, Mic-Phantom Power), Input 2 level (-10 / +10 dBu), RF power level (low, mid, high)
- Internal Adjustments: Compression ratio for audio processor
- Programming: SQ on/off, process on/off, channel lock
- Indicators
- LCD: Channel designation, lock status, RF power level, programming (front panel)
- Audio Input Status LEDs: Indicates Input 1, Input 2, and Mix audio levels; 10 segment LED's (8 green, 2 red)
- Processing: Indicated by a green LED when on (front panel)
- Test Tone: Red LED illuminates when test tone is enabled.
- RF Power: Indicated on the LCD (low, mid, high)
- RF
- Frequency Range: 72.025 - 75.950 MHz
- Number of Channels: 17 wide band, 40 narrow band
- Frequency Accuracy: ± .005% stability +32º to +122 ºF (0º to +50 ºC)
- Antenna Type: Various antennas available
- Transmitter Stability: 50 PPM
- Transmission Range: Up to 305 m (1,000 ft.)
- Antenna Connector: BNC, 50 Ohms (Use RG-58 < 100 ft or RG-8 > 100ft)
- Output Power: 80,000 uV at 3 m
- Number of Simultaneous Transmitters: Up to 8
- Power
- Power Supply: In line power supply, Listen part number LA-207 (Line cord is determined by the each Country's AC power standards)
- Power Supply Input: 100-240 VAC, 50-60 Hz, 0.4 A
- Power Supply Output: 12 VDC, 1.3 A, 15.6 W
- Power Supply Connector: 0.02 in (5.0 mm) OD, 0.01 in. (2.5 mm) ID, barrel type
- Compliance: UL, CE, GS, TÜV, RoHS
- Physical
- Dimensions (WxHxD): 8.5x1.75x9.13" (21.5x4.5x23cm)
- Color: Black with grey silk screening
- Unit Weight with Power Supply: 1.6 kg (3.5 lbs.)
- Shipping Weight: 2.7 kg (6.0 lbs.)
- Rack Mounting: One (1) rack space height, 1/2 rack space wide. One (1) or two (2) transmitters can be mounted in one rack space, optional rack mount (LA-326)
- Weight: 1.2 kg (2.6 lbs)
- Environmental
- Temperature - Operation: -10 ºC (14 ºF) to +40 ºC (104 ºF)
- Temperature - Storage: -20 ºC (-4 ºF) to +50 ºC (122 ºF)
- Relative Humidity: 0 to 95% relative humidity, noncondensing
- Compliance
- Safety: RoHS
- RF: FCC Part 15, Part 90, Industry Canada
- Audio
- LA-106 Telescoping Top Mounted Antenna
- Interconnections
- Thread Diameter: 10-32
- RF
- Frequency Range: 72.025 - 75.950 MHz
- Number of Channels: 57 (17 wide, 40 narrow)
- Typical Range: Range up to 198 m / 650 ft.
- Physical
- Length: 99 cm (39.00 in.)
- Color: Black
- Shipping Weight: 0.5 kg (1 lb)
- Diameter: 1.3 cm (0.31")
- Weight: 31g (1.10 oz)
- Interconnections
- LR-5200-072 Receiver
- Audio
- Frequency Response: 50 Hz - 15 kHz (±3 dB)
- System Distortion: < 2% total harmonic distortion (THD) at 80% deviation
- Output/s: Two (2) 3.5 mm (0.14 in.) connectors, unbalanced, 0 dBu nominal output level, 16 mW maximum, impedance 32 ohm
- System Signal to Noise Ratio: SQ enabled 80 dB, SQ disabled 60 dB
- Controls
- User Controls: Power, up/down volume, Listen button for end user channel selection
- Programming: Via software and USB port
- Set-up Controls: Press and hold up/down volume buttons for 5 seconds to enter channel adjust, use up/down to select channel
- Indicators
- LEDs: Flashes when batteries are low or to indicate charging, solid when fully charged
- Display: Channel designation,battery level, unit number, charging status
- RF
- Frequency Range: 72.025 - 75.950 MHz
- Number of Channels: 17 wide band, 40 narrow band
- Sensitivity: .6uV typical, 1 uV maximum for 12 dB sinad
- Frequency Accuracy: ± .005% stability 32 to 122 ºF (0 to 50 ºC)
- Squelch: Programmable in 20 steps, automatic on loss of RF signal
- Antenna Type: Uses ear phone/neck loop lanyard and short ear phone cable or standard earphone cable
- Power
- Power Supply: Micro USB connector, 5 V, 500 mA
- Battery Type: Lithium Ion 3.7 Vdc, 1200 mAh
- Battery Life: 8 Hours of continuous use
- Battery Charging Time: Fully charged in 2.5 Hours
- Physical
- Color: Black
- Unit Weight with Batteries: 2.4 oz (68 g)
- Shipping Weight: 3.2 oz (91g) with 1 lbs (454g) minimum
- Dimensions (HxWxD): 3.75x2x0.64" (9.6x5x1.7cm)
- Unit Weight: 1.6 oz (45 g)
- 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, Part 90, Industry Canada, RoHS
- Audio
- 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-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-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
- LPT-A107B Cable
- Interconnections: Dual RCA (male) to Dual RCA (male)
- Physical
- Shipping Weight: 1 lb (0.5kg)
- Cable Length: 6.6 ft (2m)
- Unit Weight: 1.75 oz (49g)
- 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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