Williams AV DL207 SYS D – Hearing Loop System with Dante and Network Control

Product Overview

The Williams AV DL207 SYS D is a complete induction hearing loop system for medium to large venues, built around the dual-output DL207 NET loop amplifier with Dante network audio input and PC-based network control. It delivers assistive listening audio directly to T-coil hearing aids and cochlear implants — no receiver handout required — covering up to 30,000 sq ft with perimeter loops or supporting dual-amp and phased-array hearing loop installations. The system ships with loop wire, body-pack receivers, a charger kit, warning tape, and ADA signage for a full commercial deployment.

Product Description

The DL207 NET amplifier at the heart of this system provides two independent 9.5 A loop outputs, making it the right platform for dual-amp designs and phased-array layouts that maintain even field strength in steel-structure buildings and adjacent-room installations. Onboard DSP includes parametric equalization, compression, metal loss compensation, AGC, high/low-pass filters, and adjustable audio delay, while built-in calibration tools — a test tone generator with pink noise and loop current matching — streamline commissioning to the IEC 60118-4 field strength standard.

This "D" model adds a dedicated Dante input (44.1/48 kHz, 24-bit) alongside balanced mic/line, line-level, and 25/70/100 V speaker-level inputs, so the amplifier accepts audio from networked AV systems, mixing consoles, or distributed paging systems without converters. Configuration and calibration are handled locally from the front-panel LCD or over the network with the DigiLoop PC app via Ethernet, and a loop fault relay provides supervision for integration with monitoring systems. The 1 RU rack-mount chassis drops into standard equipment racks.

The system includes 500 ft of flat copper loop wire, warning tape, two PLR BP1 body-pack loop receivers with earbuds and a drop-in charger kit for guests without T-coil hearing aids, and a T-coil ADA wall plaque. For venues considering Bluetooth LE Audio instead of a physical loop, compare the Infinium Auracast assistive listening system, or browse the complete Williams AV collection at Creation Networks.

Key Features

• Dual 9.5 A Loop Outputs — Two independent outputs drive dual-amp or phased-array induction loop installations, covering up to 30,000 sq ft with perimeter loops at a 3:1 aspect ratio.
• Dante Network Audio Input — A dedicated Dante port (44.1/48 kHz, 24-bit, 2 ms minimum latency) takes program audio directly from networked AV systems.
• Comprehensive DSP Processing — Parametric EQ, compression, metal loss compensation, AGC, high/low-pass filters, and 0–165 ms audio delay tailor loop audio to the room and structure.
• Built-In Calibration Tools — An internal test tone generator with pink noise and loop current adjustment/matching simplify commissioning to the IEC 60118-4 standard.
• Network Control via DigiLoop PC App — Function control and calibration run over Ethernet from a Windows PC, supporting remote management of installed systems.
• Flexible Input Complement — Balanced XLR mic/line with 24 V phantom power, line-level terminal block, and 25/70/100 V speaker-level input connect to virtually any source, including paging systems.
• Loop Fault Supervision — A loop fault relay with NC/NO contacts plus open/short and thermal protection support monitored, mission-critical installations.
• Complete System Package — Includes 500 ft of flat loop wire, warning tape, two body-pack loop receivers with earbuds, a dual drop-in charger kit, and a T-coil ADA wall plaque.

Typical Applications

• Auditorium
• House of worship
• Government space
• Conference room
• Boardroom
• Training room
• Multi-purpose room
• Commercial meeting space

Technical Specifications

DL207 NET Amplifier

PLR BP1 Loop Receiver (each)

PLW F500 Loop Wire

System Includes

Order with -01 suffix for Euro line cord, -02 for UK line cord, or -04 for Australia line cord.

Frequently Asked Questions

How large an area can the DL207 SYS D cover?

With both outputs driven, the DL207 covers up to 30,000 sq ft using perimeter loops at a 3:1 aspect ratio, or 18,000 sq ft at 1:1. Phased-array designs reduce overspill and improve uniformity in challenging spaces; final coverage depends on loop design and building construction.

What makes the "D" model different?

The SYS D variant adds a dedicated Dante network audio input (44.1/48 kHz, 24-bit) to the DL207 NET amplifier, allowing direct connection to Dante-enabled DSPs, consoles, and networked AV systems alongside the analog and speaker-level inputs.

Do listeners need receivers?

Guests with T-coil-equipped hearing aids or cochlear implants receive loop audio directly with no receiver. The system includes two PLR BP1 body-pack loop receivers with earbuds for guests without T-coils, helping satisfy ADA receiver requirements.

How is the system calibrated and managed?

The amplifier includes a test tone generator with pink noise and loop current matching for commissioning to IEC 60118-4. Ongoing control and calibration are available from the front-panel LCD or over the network using the DigiLoop PC app (Windows 7 or higher) via Ethernet.

Can the loop amplifier connect to a paging system?

Yes. In addition to mic/line and line-level inputs, a dedicated 25/70/100 V speaker-level input accepts audio directly from distributed audio and paging systems, with priority input selection and adjustable threshold.

Does a hearing loop installation require special planning?

Yes. Loop wire layout, building steel, and adjacent spaces all affect performance, which is why this system supports dual-amp and phased-array designs and includes metal loss compensation. Williams AV TechBlue design services are available through Creation Networks for system design support.

What warranty applies?

The DL207 NET amplifier carries a 2-year warranty against component failure and manufacturing defects.