Sound
Williams AV Digi-Wave DLT 400
Plan speakers, listeners, language delivery and charging.
Ask about rental, purchase or integration
Tell us the use, date and venue, even with an approximate brief. GLMedia is an event production company and can evaluate rental, purchase or technical support, with equipment, integration and preparation within the agreed scope. Configuration, availability and terms are confirmed in the proposal.
What it is and when it helps
DLT 400 is a Digi-Wave transceiver: it transmits and receives. DLR 400 RCH only receives and cannot transmit spoken questions. This page covers standard DLT 400, not ACM or AIM.
Connections and components
Specify DLT units for guides/interpreters, DLR 400 RCH for listeners, compatible microphones/headsets and USB-C or approved station charging. Record generation, version, group and security; do not assume other series are interchangeable.
Guided tour or bilingual meeting
Separate route, speaking turns and language feeds. A tour with questions needs different roles and settings from an audience listening to interpretation. Label units and rehearse the actual route.
Proposal options
- Initial option: Portable guide/listener package with defined functions.
- Expand the scope: Bilingual configuration, headsets, charging, distribution and support.
- Another alternative: Fixed discussion system or IR distribution if better suited to the venue.
- For a quote: Date, duration, route, languages, listeners and who must speak.
Prepare before the event
- Identify models and choose tour or interpretation mode.
- Agree group, roles, language and security.
- Charge and check units, microphones and headsets before handover.
- Test a phrase per language and the route; start at low listening volume.
Tours, questions and interpretation: agree the workflow
Proposed scenario: a guide speaks and part of the group needs another language. Separate listening to the guide, listening to interpretation and asking questions. Giving everyone a DLR provides reception only; it does not create a question path.
In standard DLT 400 interpretation, the interpreter listens to original audio on channel 0 and transmits interpretation on another channel. Do not confuse standard bilingual mode with AIM module Q&A functions; those functions are not assigned to standard DLT 400.
For occasional questions, one option is to pause and use a question microphone feeding the original audio heard by the interpreter. For interactive bilingual conversation, assess a specific compatible setup or discussion system with interpreter and operation. Transceiver count alone does not establish that workflow.
Hand out by role and plan recovery
- Assign units and responsibility to guide, interpreter, listeners and questioners. Record mode, group and role on the technical sheet; do not publish the PIN on labels.
- Configure Master 1 first using the manual and avoid duplicating it within a group. Continuity depends on that unit: prepare a spare and rehearse configuration while the system is stopped, without two active Master 1 units.
- Before handout, test guide speech, interpreter listening and a question/answer. Check who hears what on every turn and which button each person should use.
- Agree duration, breaks, returns, cleaning and replacements. We can assess equipment, configuration, interpretation and operational support as defined services, starting with date, venue and approximate need.
Questions and answers
Does everyone need a DLT?
Listeners can assess DLR 400 RCH. Speaking requires a transceiver and a configuration allowing it; more receivers do not create more speakers.
Why can one unit not hear the guide?
Compare group, mode, security, charge and volume with a working unit. Check guide microphone and Talk too; do not erase the whole group’s settings.
Are language channel and group the same?
They serve different roles. Define the communicating group and the feed each person must hear for the selected mode; label languages before handover.
Does it translate automatically?
It does not create interpretation. Provide interpreter speech, floor monitoring and routing; test both directions for bilingual use.
Can older generations be used?
Compatibility depends on model and supported functions. Check the identified devices and versions against the manual; do not assign ACM/AIM functions to standard DLT.
How do we plan charging and safe listening?
Allow time with approved cables or chargers, check condition and prepare reserve units. Start at low volume; remove swollen or damaged batteries from service for qualified attention rather than opening them.
Can a listener ask questions through DLR 400 RCH?
It does not transmit speech. Provide a transceiver with a suitable mode, or a separate question-microphone path. The interpreter must also receive that question.
Can I enable AIM Q&A on a standard DLT 400?
Do not assume so. The manual separates AIM functions. Identify model and firmware and choose a supported workflow; do not copy AIM Q&A instructions onto the standard unit.
What happens if Master 1 leaves?
The manual states the group cannot continue without Master 1. Assign responsibility, power and recovery; a spare needs rehearsed configuration and must not duplicate that role during the session.
Official documentation
Sources consulted: October 23, 2026.
Help us improve this guide
Is an explanation missing, did you find an error, or did you solve something differently? Tell us on WhatsApp.
WhatsApp opens with an editable draft. Review it and send it if you choose. Do not include passwords, keys or client information. Contributions are reviewed before being added to guides; they are not published automatically.