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$179.99
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5 Year
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Review Summary
Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.
If we can’t fix it, we’ll replace it at no additional cost.
Protect your product from drops, spills, and more.
Enjoy your gear without fear. We have you covered!
When regular use of your product over time results in mechanical or electrical failure.
We will never charge you a deductible after the purchase of a plan.
Our claims process is simple & easy and our customer service team is happy to help.
Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for international or U.S. territories purchases. Plans on open box items do not cover pre-existing damage.
Adorama Protect plans are available for ABS clients. If you have any questions or require assistanse, please call 800-223-2500
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20 Hz - 20 kHz (+/- 1 dB) Line Input63 Hz - 15 kHz (+/- 3 dB) System Specification (wireless end-to-end with LR-44)
> 70 dB (SNR) Line Input> 60 dB (SNR) System Specification (wireless end-to-end with LR-44)
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
< 0.1% (THD) Line Input< 2% (THD) System Specification (wireless end-to-end with LR-44)
Stereo/Mono Input. Two (2) Dual (RCA) Phono connectors, unbalanced, -10 dBu nominal input, +14 dB headroom, impedance 10k Ohms
Mono Input. Two (2) Phoenix Type connector, balanced, + 4 dBunominal input, +14 dB headroom, impedance 100k Ohms
Three (3) position switch - Power OFF, Power ON-Indicator Lights OFF, Power ON-Indicator Lights ON
Two (2), four (4) position rotary switches (2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz)
Two (2) audio taper rotary potentiometer, counter-clockwise decreases input mix level, clockwise increases input mix level
Green LED on in-line power supply indicates AC power is applied
Two (2) Green LEDs, two (2) Red LEDs, Green LED indicates Audio presence and Red LED indicates peaks in the audio
Solid Amber indicates carrier is present and IR is being transmitted
Solid Green indicates power is applied to unit, flashing indicates unit has entered power save mode
2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz, Selectable
Two (2) channels, Selectable carrier frequency
+/- .005% stability 0 to 50 Degree C
50 PPM
FM Wideband, +/-50kHz deviation max, 50 S pre-emphasis
Carrier will shut off when no audio is present for 15 minutes on both channels to preserve radiator life
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
2,787 sq. m (30,000 sq. ft) single channel with LR-4200-IR/LR-5200-IR receivers or 697 sq. m (7,500 sq. ft) single channel with LR-42/LR-44 receivers
1.49 W
100-240 VAC, 50-60 Hz
12 VDC, 4 A, 48 W
2.5 mm ID barrel connector, center positive
Two (2) RJ-45 connectors. providing Power and RF signal for up to two (2) LA-141 expansion radiators on each output
In-line switching mode power supply, Listen part number LA-210
IEC line cord, North America Type B (LT-84-01), Asia and UK Type G (LT-84-02), Euro Type C (LT-84-03), Australia Type I (LT-84-04)
14 Degree F (-10 Degree C) to +104 Degree F (40 Degree C)
-4 Degree F (-20 Degree C) to +122 Degree F (50 Degree C)
0 to 95% relative humidity, non-condensing
FCC part 15, ICS-03, CE, UL, CUL, C-Tick, CCC, PSE, KC, GS, RoHS, WEEE
CUL, UL, CE, CCC, C-Tick, KC, PSE, GS, FCC, RoHS
Black with White Silk Screening
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.
LR-42, LR-44, LPT-A117, LA-141, LR-4200-IR, LR-5200-IR, LR-4200-IR-P1, LR-5200-IR-P1, LP-40-IR-01, LP-41-IR, LP-50-IR, LP-51-IR, LR-X200-IR
1.5 x 10.7 x 4.1" (3.81 x 27.2 x 10.5cm)
0.8 lb (0.4kg)
with Power Supply: 1.8 lb (0.8kg)
< 2% total harmonic distortion (THD) at 80% deviation
Two (2) 3.5 mm (0.14 in.) 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
63 Hz - 15 kHz ( +/-3 dB)
> 60 dB
Power on/off and volume up/down
Via software and USB port, Auto Seek, Jack Sense, Squelch, Auto Power, Auto Off, Stereo, Brightness, Channel Name
Press and hold up/down volume buttons for 5 seconds to enterchannel adjust, use up/down to select channel
OLED - Channel designation, battery level, unit number, charging status, volume status
Flashes when batteries are low or to indicate charging, solid when fully charged
2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz
Four (4) selectable channels
+/- .005% stability 32 to 122 Degree F (0 to 50 Degree C)
FM Wideband, +/-50 kHz deviation max, 50 uS de-emphasis
30,000 sq. ft (2787 sq. m) single channel with LT-84/LA-141 or 40,000 sq. ft (3716 sq. m) single channel with LT-82/LA-140
Programmable in 20 steps, automatic on loss of IR signal
Turns unit off after a specified time of no IR signal, default is 30 minutes
Better than one (1) nW/cm2 @40 dB SNR
Micro USB connector, 5 V, 500 mA
Lithium Ion
8 Hours of typical use
Fully charged in 2.5 Hours
14 to 104 Degree F (-10 to 40 Degree C)
(-)4 to 122 Degree F (-20 to 50 Degree C)
0 to 95% relative humidity, non-condensing
FCC Part 15, ICS-03, CE, RoHS, WEEE, ADA 706, CBC 11B-706
LA-140-GY, LT-82, LA-365, LA-401, LA-381, LA-405, LA-404, LA-403, LA-402, LA-380, LA-430, LT-84, LA-141, LA-382
Flat Black
Without Belt Clip: 3.75 x 2.0 x 0.64" (9.6 x 5.0 x 1.7cm)
With Belt Clip: 3.75 x 2.0 x 0.80" (9.6 x 5.0 x 2.1 cm)
Without Batteries: 1.9 oz (53.9g)
With Batteries: 2.8 oz (79.4g)
Be at the forefront of assistive listening technology with the advanced LS-91 ListenIR iDSP Level II System from Listen Technologies. This high-tech system is a comprehensive solution for small to medium-sized venues, accommodating up to 50 seats, making it an ideal choice for boardrooms, courtrooms, theaters, and educational spaces.
The LS-91 system is more than just a transmitter; it's a complete package that includes an LT-84 Transmitter/Radiator combo, multiple LR-4200-IR iDSP receivers, and a 12-unit charging tray. This innovative system is designed to meet and exceed assistive listening requirements, providing your clients with superior audio performance while ensuring your venue's compliance with assistive listening regulations.
The LS-91 system boasts a sophisticated IR wireless assistive listening system, capable of broadcasting up to two audio channels with the option of four mono carrier frequencies; 2.3, 2.8, 3.3, and 3.8 MHz. With a coverage area of up to 30,000 ft2, the system ensures clear and crisp audio transmission even in larger spaces.
The system's audio quality is exceptional, with a signal-to-noise ratio (SNR) of 60 dB or better and total harmonic distortion (THD) of less than 2%. It also features an audio frequency response of 63 Hz to 15 kHz, ensuring a wide range of sound is captured and transmitted.
The LS-91 system is equipped with two independent mixing audio inputs, each consisting of a 3.5 mm Microphone input, a balanced Phoenix type input, and an unbalanced RCA input. This allows for versatile audio input options to suit your specific needs.
The LR-4200-IR iDSP receivers are intelligent and customizable, featuring a unique iDSPTM noise reduction technology and a multi-functional OLED display that indicates battery status, inventory number, volume level, and a customizable channel name. The receivers are also fully programmable via PC software and come with a micro USB connector for programming/setup, inventory control, charging, and firmware upgrades.
In summary, the state-of-the-art LS-91 ListenIR iDSP Level II System is a comprehensive, high-quality solution for any venue needing to provide assistive listening capabilities. Its advanced features and superior audio performance make it a standout choice in the market.