Portable ListenIR iDSP System


Offer your clients, customers, visitors and more a complete assistive listening solution wherever it is needed with the LS-88-01 Portable ListenIR iDSP system. The setup meets all IBC and ADA requirments for small to medium-size rooms with a capacity of up to 50, and the entire system is easily transported and stored in its own carrying case. Each system includes a ListenIR Transmitter/Radiator Combo as well as recievers, ear speakers, and neck loop lanyards for multiple users, in addition to other required equipment.

From classrooms to conferences, boardrooms to jury deliberation spaces and more, the LS-88-01 gives you a complete package to begin offering on-demand assistive listening right away.

See Architectural & Engineering Specs

This product is available through authorized resellers.

Request Quote


One (1) LT-84-01 ListenIR Transmitter/Radiator Combo
Two (2) LR-4200 IR Intelligent DSP IR Receiver
Two (2) LA-430 Intelligent Ear Phone/Neck Loop Lanyard
Two (2) LA-401 Universal Ear Speaker
One (1) LA-277 Conference Microphone
One (1) LA-338 Table Top Tripod
One (1) LA-346 Carrying Case
One (1) LA-423 4-Port USB Charger


  • Pre-configured transmitter/radiator, receivers, microphone and more for immediate assistive listening wherever it is needed
  • Offers ideal coverage for small to medium venues with up to 50 seats
  • Easy to set up, tear down, and transport
  • Offers crystal-clear audio performance in classrooms, conferences, boardrooms and more
  • Multiple receivers, neck loop/lanyards, and ear speakers are included

Also Needed



Shipping Weight4.6 kg (10.0 lbs.)
Weight3.7. kg (8.0 lbs.)



+What is the purpose of Squelch?

The purpose of squelch is to mute the audio output of your receiver when the signal from the transmitter is turned off or is too weak to be received. Without squelch you would hear radio noise in your earphone. The squelch function can be programmed to the desired setting.

+How many channels (carriers) can the LT-84 produce?

Two (2) channels.

+How many channels (carriers) can be produced simultaneously in a room?

Four (4) channels. You will need two (2) LT-84 (2 carriers per LT-84).

+What is the coverage area provided by the LT-84?

30,000 ft² (2787 m²) single channel with LR-4200-IR/LR-5200-IR receivers or 7,500 ft² (697 m²) single channel with LR-42/LR-44 receivers

+Does the number of channels (carriers) affect the coverage area?

Yes, for one (1) channel (carrier), the line-of-sight coverage area is 30,000 ft² (2787 m²) and for two (2) channels (carriers), the line-of-sight coverage area is 15,000 ft² (1394 m²) with LR-4200-IR/LR-5200-IR receivers.

+How many Expansion Radiators (LA-141) can you use on a system?

Yes, for one (1) channel (carrier), the line-of-sight coverage area is 30,000 ft² (2787 m²) and for two (2) channels (carriers), the line-of-sight coverage area is 15,000 ft² (1394 m²) with LR-4200-IR/LR-5200-IR receivers.

+How do I connect multiple Expansion Radiators (LA-141)?

A maximum of two (2) LA-141s can be connected to each Expansion Link output RJ-45 on the LT-84 with a maximum daisy chained CAT-5e cable length of 100 ft. (30.5 m). CAT-5e cable must be at least 24 AWG!

+What is the warranty of the LT-84?

The LT-84 has a 3-year warranty. Listen Warranty

+What is the warranty on the Lithium-ion battery?

The Lithium-ion battery has a 1 year warranty. All other accessories have a 90-day warranty. Listen Warranty

+What type of battery technology does the LR-4200 use?

The LR-4200 uses a non-proprietary field replaceable Lithium Ion battery.

+How long does it take to fully charge the LR-4200?

It varies dependent on the depletion of the battery. A fully depleted battery will charge in 2.5 hours or less.

+How many LR-4200 receivers can I use in a system?

As many as you need, the number is endless.

+How long will the LR-4200 run on a fully charged battery?

The LR-4200 will run continuously for 8 hours on a fully charged battery