Electronics / Headphones Earbuds
Sennheiser RS 120-W Wireless Headphones User Guide
Quick start guide for the Sennheiser RS 120-W wireless headphones, covering transmitter connection, battery installation, charging, pairing, and sound mode settings.
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This document provides essential instructions for setting up and operating the Sennheiser RS 120-W wireless headphone system. It covers the initial connection of the transmitter, battery management, charging procedures, and basic operation including pairing and sound mode selection.
Connecting the transmitter
The transmitter (TR 120-W) must be connected to both a power source and an audio source:
- Power: Connect the provided power supply unit (Model: NT9-3AW) to the transmitter and a wall outlet.
- Audio: Connect the transmitter to your audio source (e.g., TV) using either the 3.5 mm jack or RCA/Cinch cables.
Battery installation and charging
The headphones (HDR 120-W) require two AAA size rechargeable NiMH batteries.
- Installation: Open the battery compartment on the left earcup (Left L) and insert the batteries according to the polarity markings.
- Charging: Place the headphones on the transmitter cradle. The LED indicates charging status.
- Charging times: Initial charge takes approximately 24 hours; regular charging takes approximately 18 hours.
Operation and settings
- Switching on/off: Use the power button on the headphones. The LED indicator confirms the status.
- Adjusting volume: Use the volume control buttons located on the right earcup (Right R).
- Sound modes: Select between Neutral, Music, or Speech modes using the mode switch to optimize audio performance.
- Pairing: To pair additional headphones, ensure the transmitter is on and place the new headphones within 30 cm (11 inches) of the transmitter.
Support
For further assistance, manuals, and video tutorials, visit www.sennheiser-hearing.com/download or www.sennheiser-hearing.com/how-to-videos.
Official resources from the manual
Manufacturer information
Sennheiser
Practical help
Common problems
Headphones not charging
Ensure the headphones are correctly placed on the transmitter cradle and the transmitter is connected to power.
No sound
Check that the transmitter is properly connected to the audio source and that both the transmitter and headphones are switched on.
Before use
- Ensure you have 2 AAA rechargeable NiMH batteries.
- Connect the transmitter to a power outlet.
- Connect the transmitter to your audio source (TV/Audio device).
- Install batteries in the left earcup.
- Charge the headphones fully before first use.
Specs in practice
- Initial charging time
- Approximately 24 hours required for the first charge.
- Regular charging time
- Approximately 18 hours for a full charge after initial use.
- Pairing distance
- Headphones must be within 30 cm (11 inches) of the transmitter during the pairing process.
Images and diagrams
- The transmitter features an LED indicator to show power and connection status.
- The left earcup contains the battery compartment.
- The right earcup contains the volume controls and sound mode switch.
Model compatibility
- Compatible with 3.5 mm and RCA/Cinch audio outputs.
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.