Digi-Loop Large Area, Dual Channel Hearing Loop System

DL210 SYS 1 2.0

The DL210 SYS 1 2.0 hearing loop system, designed for large spaces, extends hearing support to those with T-coil-enabled hearing aids and cochlear implants. Its network-control capability provides seamless, remote system set-up, operation, and monitoring via laptop or tablet. The dual-channel capability allows venues to broadcast the audio signal to two separate areas or in phased array designs.

This amplifier is well-suited for areas such as auditoriums and gymnasiums.

System Includes

The DL210 SYS 1 2.0 hearing loop system maximizes modern amplifier technology. Its network-control capability provides seamless, remote system set-up, operation, and monitoring of the induction loop system via a laptop or tablet. DSP audio processing offers flexible, powerful software control of mixing, equalization, compression, and more. Powerful Class D pulse-width amplifier maximizes the efficiency of the unit.

This assistive listening system’s design offers a dual 12 A rms loop output for dual loop or phased array configuration. A 70-100 V input connects to a distributed speaker/paging system, ensuring announcements are heard by hearing aid users.

Meet IEC 60118-4 standards on system performance when integrated into a correctly designed and installed system. The DL210 SYS 1 2.0 is also tested to IEC Specifications 62489-1 Benchmark Standards.

System Includes

  • (1) DL210 NET 2.0 – Induction Loop Amplifier
  • (2) PLR BP1 – Body-Pack Receivers with Batteries
  • (2) EAR 022 – Surround Earphones
  • (1) BAT KT6 – Dual Drop-in Charger Kit (includes CHG 3502 Dual Drop-In Charger and (2) BAT 026-2 AA NiMH batteries)
  • (1) IDP 009 – ADA Wall Plaque (T-Coil)
Order system with -01 suffix for Euro Line Cord
Order system with -02 suffix for UK Line Cord
Order system with -04 suffix for Australia Line Cord

DL210 NET 2.0 architectural and engineering specifications

It shall have an RJ-45 Dante ethernet jack*. It shall have a USB jack to provide firmware upgrades to the amplifier using a computer. It shall have two MIC/LINE LEVEL 3-pole terminal block inputs, balanced or single-ended, with 48 V phantom supply in microphone mode. It shall have a configurable PRIORITY INPUT function. It shall have a 70-100 V, 2-pole terminal block input, to provide a high/speaker-level input connection for use with distributed speaker systems. It shall have an internal frequency generator for calibration providing 100 Hz, 500 Hz, 1 kHz, 2.5 kHz and 5 kHz tones, and Pink Noise. It shall have two LINE OUTPUTS, balanced or single-ended to provide loop-through connections for line level signals going to other equipment such as recording devices or additional loop amplifiers. It shall have a 1/4” Headphone jack on front panel for monitoring of inputs or outputs, selectable in the menu. It shall have a loop fault relay output (NC,NO,C) for triggering external systems when a loop fault occurs. This shall be integrated into the RS-232 DB-9 connector. It shall provide an output drive voltage of up to 33.3 Vrms, 47.6 Vpk per output. It shall provide an output current of up to 12 Arms, 17 Apk per output. It shall have a front control interface consisting of a backlit LCD screen and control button/dial. It shall have adjustable settings for input mixing, parametric equalization, compression, frequency-shaping, metal loss compensation, high and low-pass filters, AGC and audio delay. It shall display warnings for LOOP FAULT (open loop, shorted loop or out of impedance range), OVER TEMP, and CLIPPING. It shall have protection against loop faults and overheating (amplifier shuts down). It shall be controllable by devices such as a Windows Surface Tablet, or PC, with PC App software installed. It shall be compatible with either US or international power systems with the appropriate power cord. Performance shall meet IEC 60118-4 system performance requirements when loop system is designed and installed correctly. Specifications/testing shall conform to IEC 62489-1 benchmark testing standards The loop amplifier shall be the Williams AV model DL210 NET 2.0. The loop amplifier with the Dante input* shall be the Williams AV model DL210 NET D 2.0.

DL210 NET 2.0

Dimensions 2 RU Rackmount, 19” W x 3.5” H x 12” D. Chassis is 17” W.
Weight 14.3 lbs (6.5 kg)
Color Case: Black, white and blue legends on front, white legends on back. LCD: Backlit Blue.
Fan cooling Variable Speed, Temperature Controlled
Power supply Internal, Universal 100-240 VAC, 50/60 Hz, 250 Watt. Fuse: 5 x 20 mm, 5 A, 250 V. AC power plug is IEC 320-C14.
Heat output @ 120 VAC Sleep state: 100 BTU/hr; Idle state: 146 BTU/hr; Driving two loops @ 12 A each: 1,040 BTU/hr
Ethernet (1x) RJ-45; 10-100 MBps.
USB (1x) standard-B. USB 1.1, 2.0 or 3.0 supported.
RS-232/Loop fault relay (1x) DB-9 jack. RS-232: Pin 2=Tx, Pin 3=Rx, Pin 5=gnd. Loop fault relay: Pin 1=NC, Pin 4=Common, Pin 6=NO. Relay contact rating: 2.0 A @ 30 VDC.
Environment 0-35° C ( 32-95° F), 0-90% relative humdity.
Coverage area* 31,400 sq. ft. (2,917 sq. m.) (Perimeter Loop, 1:1 aspect ratio, both outputs driven) 51,660 sq. ft. (4,800 sq. m.) (Perimeter Loop, 3:1 aspect ratio, both outputs driven)
Dante input No. Dante input available on DL210 NET D 2.0 model only.
Mic/Line inputs (2x) 3-position terminal block, input impedance=1.5 kΩ Mic, 10 kΩ Line. Configurable/Accepts: Mic, Line -10 dBV, Line +4 dBu, or Line +8 dBu, balanced or unbalanced. Phantom supply (48V).
70-100 V input (1x) 2-position terminal block; high/speaker-level input (accepts 25 V, 70 V or 100 V) from distributed audio/paging systems.
Line outputs (1x) 3-position terminal block; loop-through of Mic/Line Input 1 [&] Line Input 2, +4 dBu, Balanced or Unbalanced. The line outputs mirror the audio of the loop output.
Loop output(s) (1x) 2-position terminal block per output
Audio output delay Adjustable from 0 to 165 msec
Headphone output (1x) 1/4” stereo headphone jack, on front of unit. Monitored input or output selectable in menu.
Loop fault relay Integrated into RS-232 DB-9 jack. Pin 1=NC, Pin 4=Common and Pin 6=NO. Contact rating: 2.0 A @ 30 VDC.
Loop output drive voltage 33.3 Vrms (47.1 Vpk) continuous
Rated loop output current* 12 Arms(17 Apk) per output
Loop resistance range 0.5 Ω to 3.0 Ω (DC)
Speaker output Integrated into Loop Output A terminal block (switchable in menu). 225 Watts x 1 channel @ 4Ω, 125 Watts x 1 channel @ 8Ω, (Class D). Frequency response = 20 Hz-20 kHz, THD=0.07%.
Rated load* 0.5 Ω DC with 135 µH inductance
Loop frequency response 45 Hz to 9.0 kHz ± 2 dB (1 kHz ref.)
Rated loop THD* [lt]1 % at rated output current (1 kHz sine wave).
Front controls Front LCD display menu access/adjustment via control button/dial.
Adjustable settings Input mixing, parametric equalization, compression, metal loss compensation, high and low-pass filters, AGC and audio delay, output levels. See User Manual for adjustment range(s).
Internal calibration tools Test tone generator with pink noise, loop current adjustment/matching. See User Manual for details.
Other features Save/load configuration, loop test, priority input selection with adjustable threshold, loop fault relay, open/short and thermal protection. See User Manual for details.
Network control [&] firmware Function control and calibration by DigiLoop PC App via ethernet (RJ-45). PC App requires Windows 7 or higher. Firmware updates through USB only.
Warranty 2 years
Approvals CE, UL, ULC, FCC, Industry Canada, RoHS, WEEE, CB scheme, RCM
Standards compliance This product is designed to meet the IEC-60118-4 standard when correctly designed, installed and commissioned. Test Specifications provided to the IEC 62489-1 standard.

EAR 022

Style Around-ear speaker
Plug 3.5mm mono
Cord 39"
Driver Size 23 mm
Nominal Impedance 32Ω
Freq. Response 20 - 20kHz
Weight 15g
Max Power Input 30 mW
Sensitivity 118 dB @ 1kHz

IDP 009

10-3/8" (L) x 6-¼" (W) x 1/8" (H)  

PLR BP1 architectural and engineering specifications

The receiver shall be a body pack style Induction loop receiver. It shall operate for up to 200 hrs with two AA Alkaline batteries and be housed in a black plastic enclosure. It shall have battery recharge ability utilizing drop-in chargers. The receiver shall have a 3.5 mm headphone jack, on/off volume control. There shall be a tone control inside the battery compartment. It shall have a green power LED which will blink when the battery is low.
The receiver shall be the model PLR BP1.



4.1"H x 2.85"W x 1.38"D (104 mm H x 72 mm W x 35 mm D).


4.6 oz (130 g) with batteries, 2.6 oz (73 g) without batteries.


Black ABS/polycarbonate molded plastic case.

Battery Type:

(2) AA (1.5VDC) Alkaline or NiMH (rechargeable).

Battery Life:

Up to 200 hours with Alkaline batteries.

LED Indicator:

Green LED indicates power on, flashes when batteries are low.

Headphone Jack:

3.5mm stereo TRS jack works with mono or stereo headphones.

Volume control:

External switched thumb wheel controls power on/off and volume level.

Tone control:

Rotary control inside battery compartment (1kHz reference at 400mA/m input with Tone at mid position)

Induction Coil:

Maximum reception: receiver oriented vertically

Power Output:

35mW (max) into 33 ohms mono impedance



Frequency Response:

300Hz to 10KHz, -6dB


2 Years

No Firmware Found

Design & Consultant Specs