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The Digi·Loop induction loop system is the first of its kind to maximize modern amplifier technology. DSP audio processing offers flexible, powerful software control of mixing, equalization, compression, loop phase shift and more. Powerful Class D, pulse-width amplifiers maximize efficiency, and reduce size and weight. And network control capability provides seamless, remote system set-up, operation and monitoring via laptop, tablet or other portable device. The Digi-Loop’s dual-amplifier design offers flexibility, with the option of single 12A output for perimeter loops or dual 10A outputs for loop arrays or one loop and one loudspeaker. Priority input (70-100V) is also available for connection to a paging system, ensuring life/safety announcements are heard loud and clear. And Digi-Loop is the only loop amplifier to offer an easy-to-read LCD graphic display.
3.5 mm mono
20 - 20kHz
Max input power
128dB @ 1kHz
10-3/8" (L) x 6-¼" (W) x 1/8" (H)
The loop amplifier shall be designed for rooms of up to 6500 sq. ft. (600 sq. m) with loop signals and is the ideal solution for events and meeting venues.
It shall have one XLR digital audio input for use with digital audio sources such as pro audio consoles with digital AES/EBU output, etc. It shall have an ethernet jack for Dante digital audio input.
It shall have an ethernet jack to provide configuration capability over an ethernet (10 base T) network. It shall have an additional ethernet jack for connection to a Dante network.
It shall have an RS-232 jack to provide control capability from 3rd-party controllers such as Crestron, AMX, Extron, etc.
It shall have a USB jack to provide access to internal configuration with a computer.
It shall have two MIC/LINE LEVEL inputs that can be configured as LINE (balanced) or as MICROPHONE input(s). These inputs shall be mixed with the RCA LINE inputs into one mono output for the loop.
It shall have two RCA LINE inputs that can be used to supply one or two channels of audio. These two channels shall be mixed together, then mixed with the two MIC/LINE inputs into one mono output for the loop.
It shall have a 70-100V input to provide a speaker-level input connection for use with distributed speaker systems.
It shall have two LINE OUTPUTS to provide loop-through connections for line level signals going to other equipment such as recording devices. These line outputs shall be the summed combination of the MIC/LINE LEVEL inputs and the RCA LINE inputs.
It shall have two LOOP OUTPUTS for running either one large loop, two individual loops, a phased-array system, or 1 loop + 1 speaker. Output A will be configurable in the menu to be a speaker output.
It shall have a 1/4" Headphone jack for monitoring.
It shall provide an output of up to 12A rms on output A, for one loop with optimum loop field strength. When both outputs A and B are used, each output will supply up to 10A rms.
It shall be compatible with either US or international power systems with the appropriate power cord.
The loop amplifier with the ethernet jack shall be the Williams Sound model PLA DL 210 NET.
The loop amplifier with the ethernet jack and Dante jack shall be the Williams Sound model PLA DL 210 NET D.
2U rackmount, 19" W x 3.5" H x 12" D. Chassis is 17" W.
14.3 lbs (6.5 kg)
Case: Black, white and blue legends on front, white legends on back. LCD: Backlit Blue.
Variable Speed, Temperature Controlled
100-240 VAC, 50/60 Hz, 500 Watt
Sleep state: 83 BTU
Idle State: 112 BTU
Driving two loops @9A each: 286 BTU
(1x XLR); AES or EBU; 44.1kHz/48kHz
Analog Line Inputs
(1x RCA, L+R); -10dBV, 10kΩ input impedance
(2x Phoenix Terminal Block); balanced or unbalanced.
Input impedance: 1.5kΩ Mic, 10kΩ Line.
Configurable/accepts Mic, Line +4dBu, Line +8dBu, or Line -10dBV.
(1x Phoenix Terminal Block); speaker-level input, for distributed audio systems.
(2x Phoenix Terminal Block); loop-through of Mic/Line inputs 1 & 2. +4dBu. Balanced or Unbalanced.
(2x Phoenix Terminal Block).
Required Loop Resistance
0.5Ω to 1.5Ω (DC)
Output Current (Loop)
One Loop, Output A or B: 12A rms.
Two Loops, Outputs A and B: 10A rms each
Output Power (Speaker)
50 Watts X 1 Channel @ 4 Ω (35 Watts @ 8 Ω). Class D.
Loop Frequency Response
100Hz to 10kHz @400mA (Output A or B)
Speaker Frequency Response
20Hz - 20kHz (Output A)
Speaker Dynamic Range
>90 dB; A-weighted, typical
0.07%; 50 watts into 4Ω @ 20-20kHz
<1% at nominal power output, 1kHz sine wave
Front LCD display menu access/adjustment via control dial.
Ethernet, USB, RS-232. Application “PC Mixer App" supports all 3 protocols.
Standard RJ-45 jack.
Standard DB-9 COM port connector.
Standard-B jack. USB 1.1, 2.0 or 3.0 supported.
CE, UL, ULC, FCC, Industry Canada, RoHS, WEEE, CB scheme
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.
(2) AA (1.5VDC) Alkaline or NiMH (rechargeable).
Up to 200 hours with Alkaline batteries.
Green LED indicates power on, flashes when batteries are low.
3.5mm stereo TRS jack works with mono or stereo headphones.
External switched thumb wheel controls power on/off and volume level.
Rotary control inside battery compartment (1kHz reference at 400mA/m input with Tone at mid position)
Maximum reception: receiver oriented vertically
35mW (max) into 33 ohms mono impedance
300Hz to 10KHz, -6dB
|Induction Loop System Design||Design Guides||English|
|Loop Brochure - Low Res||Brochures||English|
|Loop Brochure - High Res||Brochures||English|
|Loop System Quick Setup Guide||Manuals||English|
|White Paper - Crestron Control of DL210 Loop Amplifier||White Papers||English|
|Induction Loop Certification Form (IEC 60118-4)||Supplements||English|
|Williams Sound: Induction Loop Installation|
This video shows a typical loop installation in a conference room.