Loop – NSL


Your audience is filling the room… motivated to listen, learn and be inspired. From houses of worship to university lecture halls to business conferences, induction loop technology from

Williams Sound ensures every listener in attendance — including those using T-coilequipped hearing aids — can hear your message clearly. Our induction loop systems provide a more inclusive experience for all — complete solutions that help increase intelligibility, enhance user experience, and readily meet your facility’s needs for global disability legislation


· Network control capability — seamless system set-up, operation and monitoring via Windows® laptop or tablet.

· Dante™ audio input option

· DSP audio processing for flexible, powerful software control

· Discrete — listeners who use T-coil-equipped hearing aids tuned for their specific hearing loss do not need a separate receiver.

· Listeners can sit anywhere “in the loop” — number of listeners is limited only by the number that can fit in the “looped” area.

· Can be used in any country — no license requirement

Induction Loop

In simple terms, an induction loop system consists of copper wire placed in the appropriate pattern in a listening area, and a loop amplifier connected to an audio source. Audio signals are amplified and circulated through the loop wire. The resulting magnetic energy field is detected and amplified by the “telecoil” common to many hearing aids, cochlear implants and

induction loop receivers. The end result is a high-quality amplified reproduction of the original audio signal. Intelligibility is greatly increased because the distance between the speaker and the listener(s) is bridged, and background environmental noise is reduced.

Loop Components

Large Area

The network-controlled Digi·Loop® induction loop amplifier is now available in eight state-of-the-art models. The next-generation DL210 NET 2.0 and DL210 NET D 2.0 (with Dante™ audio inputs) amplifiers offer DSP audio processing with flexible, powerful software control of mixing, equalization, compression and loop phase shift. Potent Class D, pulse-width amplifiers maximize efficiency, and reduce size and weight. And the Digi-Loop dual-amplifier design in each offers impressive flexibility, with the option of a single 12A output for large perimeter loops, or dual 10A outputs for phased arrays. LED display input panel provides flexibility during status and intuitive adjustments.

Small-Mid Area

The DL207 NET and DL107 NET offer network control capability and optional Dante audio inputs. DSP audio processing provides superior sound quality, and online calibration tools offer ease of installation. The DL207 NET and NET D (dual output — 2 x 7.0 amps) are ideal for dual-amp or phased-array installations in mid-size rooms. The DL107 NET and NET D (single output — 7.0 amps) are ideal for single-room perimeter and single-array installations.


The PLR BP1 body-pack induction loop receiver is designed for use within an induction loop system by individuals who are hearing challenged but do not wear t-coil-equipped hearing aids. Simple and convenient to use, this receiver is compatible with all IEC60118-4 compliant induction loop systems. The PLR BP1 receiver is compatible with the optional CHG 3512 and CHG 3502 drop-in chargers.

PLW F300 / F500 Power Loop Wire, Flat Copper, 3/4” Wide, 300’ or 500’ spool.

FWT 001 Flat Wire Tape — Cloth-based flat wire warning tape, 2”W x 165’L roll.

White cloth with blue lettering. For securing flat loop wire to floor. Strong adhesive

but releases without leaving residue.

How it works

1. A sound source — such as a voice, TV or other audio system — is captured using a microphone or via a line-out connection.

2. The sound signal is then connected to an induction loop amplifier. This generates a current to pass the signal to an induction loop, usually made of copper tape or wire.

3. The copper wire induction loop (usually) surrounds the area where the listening audience is located and produces a magnetic field.

4. The magnetic field is picked up by the Telecoil (T-coil) inside the hearing aid of an audience member who has difficulty hearing.

5. The hearing aid tailors the sound to the specific needs of the individual. Sound is delivered directly into the ear canal, withoutbackground noise and with the full spectrum of sound frequencies required for intelligibility.


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Unit 2, 180 Montgomerie Rd
Airport Oaks
Auckland 2022

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