Features
A Digi-Wave system consists of at least one transceiver (DLT 400) and various combinations of transceivers and receivers (DLR 400 RCH or DLR 400 ALK). Combinations of one or more DLT’s and DLR’s can be used to facilitate different events, depending on what needs to be spoken and what needs to be heard. Typical scenarios include:
- Guided Tours – with one or more tour guides (2-way), with audience participation (2-way), or without audience participation (1-way)
- Language Interpretation – one or more interpreted languages transmitted to audience (1-way)
- Intercom – with up to six people able to speak simultaneously, and even more listening
- Hearing Assistance – featuring boosted audio for improved comprehension
DLR 400 ALK
| Dimensions: |
2.36″ W x 3.54″ H x 0.63″ D
(60 mm x 90 mm x 16 mm) |
| Weight: |
1.7 oz. (47 g) without batteries. |
| Frequency Band: |
2.4 GHz (ISM band) |
| Modulation: |
FSK |
| Case Material: |
Black ABS Plastic |
| Battery Type: |
2 x AAA Alkaline Batteries |
| Battery Life: |
Alkaline Disposable (BAT 010-2): Up to 30 hrs |
| Power Save: |
Auto Sleep Mode after 5 minutes of no RF signal from compatible devices |
Audio Frequency Response:
(-3dB level) |
Intercom Mode: 100 – 7,300 Hz
Interpretation and other modes: 100-11,200 Hz |
| SNR: |
74 dB (A-weighted) |
| THD: |
0.1% (typical) |
| Antenna: |
Internal |
| Range: |
Up to 900 ft (274 m) (depending upon environmental conditions) |
| Headphone Audio Output: |
3.5 mm TRRS jack with mono output for headphones, earphones, or neckloop
27 mW maximum @32 ohms |
| Display: |
LCD shows status: Battery Level, RSSI, Group/Channel # |
| Temp. Range: |
14° – 113°F (-10° to 45°C) |
| Compatible Units |
DLT 400, DLT 300 |
| Approvals: |
FCC, Industry Canada, RoHS 3, CE, WEEE, RCM, ANATEL, KC, Giteki |
| Warranty: |
5 years on parts and labor with product registration; 2 years standard without registration. Internal batteries are covered for 1 year and accessories for 90 days, regardless of registration.
Visit the Warranty and Registration page for details. |
NOTE: DLR 400 ALK units are not compatible with the special AIM features.
Warranty
5 years with registration - 2 years standard (90 days for accessories)
Digi-Wave 400 Receiver, Alkaline (DLR 400 ALK): FAQ
What is the DLR 400 ALK?
The DLR 400 ALK is a listen-only wireless receiver for Digi-Wave 400 systems, powered by two standard AAA alkaline batteries. Listeners use it to hear a presenter, guide or interpreter who is talking on a Digi-Wave transceiver. It’s used for tours, trainings, presentations and hearing assistance in houses of worship, classrooms and healthcare facilities.
What’s the difference between the DLR 400 ALK and the DLR 400 RCH?
The ALK runs on two replaceable AAA alkaline batteries, so there’s nothing to charge. The RCH has a built-in rechargeable battery and charges by USB-C or in a CHG 412 charger. The RCH also supports the Advanced Interpretation (AIM) and Advanced Comms (ACM) features. Choose the ALK for occasional use or when you don’t want to manage charging. Choose the RCH for daily use, large fleets or advanced interpretation features.
What batteries does it use, and how long do they last?
Two AAA alkaline batteries (BAT 010-2) last up to 30 hours of listening.
Can the listener talk back?
No. The DLR 400 ALK is receive-only. Anyone who needs to speak needs a DLT 400 transceiver or a DW T410 microphone transceiver.
What transmitters does it work with?
The DLR 400 ALK works with the DLT 400 transceiver and the older DLT 300. It also works with the DW T410 microphone transceiver.
Does it work with AIM or ACM systems?
No. The DLR 400 ALK does not support the special Advanced Interpretation Module (AIM) features, such as 24-channel interpretation and Q&A mode, and it isn’t listed as compatible with the Advanced Comms Module (ACM). For AIM or ACM systems, use DLR 400 RCH receivers with firmware 1.3.0 or later.
What does the display show?
The LCD shows battery level, signal strength and the group/channel number the receiver is tuned to.
What can I plug into it?
The 3.5 mm jack works with Williams AV earphones, headphones and the NKL 001 neckloop for T-coil hearing aid and cochlear implant users. Output is mono, up to 27 mW at 32 ohms.
What is the range?
Up to 900 ft (274 m) from the transmitter. Walls, crowds and other 2.4 GHz devices can shorten it.
Is the audio secure?
Yes. Digi-Wave uses frequency-hopping digital spread spectrum in the 2.4 GHz band, so the audio is private and resists interference from other devices.
Does it need a license or frequency coordination?
No. It runs in the license-free 2.4 GHz ISM band. It is approved for FCC, Industry Canada, CE, RCM, ANATEL, KC and Giteki markets.
What happens if I forget to turn it off?
The receiver goes to sleep on its own after 5 minutes without a signal from a transmitter, which saves the batteries.
What accessories are available?
- BAT 010-2: replacement AAA alkaline batteries
- CCS 060: silicone skin with lanyard and wrist strap
- Earphones: EAR 022 surround earphone, EAR 042 dual in-ear isolation earphones
- Headphones: HED 021 and HED 027 folding mono, HED 026 rear-wear mono, and HED 040 hearing-protector headphones for loud environments
- NKL 001: 18″ mono neckloop
Where can I find the manual?
The product page includes the DLR 400 ALK Quick Start Guide, the Digi-Wave 400 user manual in English and Spanish, the spec sheet, a brochure, a security features guide and a Digi-Wave comparison chart.
How big and heavy is it?
It measures 2.36″ W x 3.54″ H x 0.63″ D (60 x 90 x 16 mm) and weighs 1.7 oz (47 g) without batteries. It works in temperatures from 14° to 113°F (−10° to 45°C).
What’s the warranty?
The DLR 400 ALK is covered for 5 years on parts and labor if you register the product (2 years if you don’t). Accessories are covered for 90 days. Full terms are at williamsav.com/support/warranty-product-registration.
How do I get pricing?
Click “Request More Info” on the product page and the Williams AV team will follow up with a quote.
