The Listen Technologies LA-439 is an advanced neck loop sized for children, for listeners with telecoil hearing aids or cochlear implants. It plugs into the 3.5 mm output of a Listen receiver and produces 400 mA/m from a 380 mV input. Venues issue them with assistive listening receivers in theatres, lecture halls, courtrooms and places of worship.
400 mA/m
At 380 mV, 1 kHz
68.6 cm
Loop length
3.5 mm
TRS plug
Features
Neck loop sized for children
Works with telecoil-equipped hearing aids and cochlear implants
Safety breakaway connection
Compatibility switch for a wide range of receivers
Works with Listen Technologies receivers
Specifications
| Field strength | 400 mA/m from 380 mV RMS at 1 kHz |
| Frequency response | 20 Hz to 15 kHz (±3 dB ref 1 kHz) |
| Impedance | 3 to 6 ohms at 1 kHz |
| Max power input | 1W |
| Connector | 3.5 mm stereo (TRS) |
| Loop / lead length | 68.6 cm / 38.1 cm |
| Weight | 47.3 g |





