IRA-87 Linkx Sound Field Audio System View full size
IRA-87 Linkx Sound Field Audio System


Sound field

Manufacturer: LINKX

IRA-87 2-Channel Infrared Soundfield System

The IRA-87 is a 2 channel infrared receiver amplifier/mixer with 2 auxiliary inputs for Computers, DVDs or even an iPod/Mp3 player, along with page pass-through, a 5-band equalizer, and a 32 watt amplifier. It has an outpout on the front panel for connections to an Assisted Listening System Transmitter. (ALS) 

It is the core of a sound-field system for use in the classroom, corporate boardroom or secured briefing rooms up to 2,500 sq. ft. that may require up to 4 speakers. IRA-87 also features an output for recording the day’s lessons. 


  • Two channel infrared wireless microphone receiver.
  • Channel A priority (Teacher priority)
  • Two power amplifier: 16-watt each
  • Two stereo auxiliary inputs for computer, DVD or Video Projector
  • Addition Aux input gain, adjustable
  • One cable microphone input
  • Page Over-ride with Page Pass through to classroom speakers
  • Five-band equalizer with security cover
  • Front panel audio output for personal FM system with gain control (3.5mm)
  • Record output (line level, pre-fader)
  • Rack or shelf/wall mounting kits (optional)


Standard System Configuration:
● IRA-87 infrared receiver amplifier x 1
● T6 Pendant transmitter x 1
● IRS-55 celing sensor with 15m cable x 1

Specification -

Carrier Reception


Reception System


No. of Channel



CH A: 2.08 MHz / CH B : 2.54 MHz

Infrared Wavelength

850 nm





Nominal Deviation


Maximum Deviation


External Sensor Inputs

2, RCA type.

Amplifier Output

(Two Amp) 32W total

12W ea. into 8Ω load / 16W ea. into 4Ω load


5 Band, ±12dB

Au x Inputs

2 Aux inputs, Li ne Level 300mV/ 47kΩ w/ +6dB gain

1 Mic input , Mic Level 6mV/ 600 Ω

Front Panel Output

Line l evel w / gain (pre-fader)

Page Input

Speaker Level: OFF, 25, 70, 100v

Page Pass Through

Switchable w/ gain control

Frequency Response

40Hz -18KHz, ±3dB

SIN Ratio



< 1%@ l KHz

Power Supply

DC 15V / 2.8A, 42Watt


215(W) x 190(D) x 44(H)mm


Approx. 1.22kgs