User Manual for Sennheiser RS 120-W Wireless TV Headphones

Quick Start Guide

The Sennheiser RS 120-W is a wireless TV headphone system. To get started, connect the transmitter to a power source and your audio device (TV, hi-fi, or home cinema). Insert the provided rechargeable NiMH batteries into the headphones. Charge the headphones for at least 24 hours before the first use. Once charged, switch on the transmitter and the headphones to begin listening.

Package Contents

• Headphones (Model: HDR 120-W)
• Transmitter (Model: TR 120-W) with stereo RCA audio cable
• Power supply unit (Model: NT9-3AW) with multi-country adapters
• Two rechargeable NiMH batteries (AAA)
• Adapter for 3.5 mm audio connection

Product Overview

Headphones

The headphones feature an adjustable headband, volume control on the right ear cup, and an ON/OFF switch. The battery compartment is located under the left ear pad.

Transmitter

The transmitter serves as both a signal source and a charging cradle. It includes an ON/OFF LED, a CHARGE LED, a sound mode switch, and connections for power and audio.

Getting Started

Setting up the Transmitter

Place the transmitter near your audio source. Ensure it is at least 50 cm away from other wireless devices and not near metal structures to maintain signal range. The transmitter can be wall-mounted at a maximum height of 2 meters.

Connecting to an Audio Source

The transmitter connects via RCA cables. If your device only has a 3.5 mm jack, use the included adapter. If your device only has digital optical output, an analog-to-digital converter (not included) is required.

Connecting to Power

Attach the appropriate country adapter to the power supply unit, connect it to the transmitter, and plug it into a wall socket. The ON/OFF LED will light up green when an audio signal is present.

Batteries and Charging

To insert or replace batteries, twist the left ear pad counterclockwise to remove it, insert two AAA NiMH rechargeable batteries observing correct polarity, and twist the ear pad back on until it clicks. Place the headphones on the transmitter cradle to charge. A full charge takes up to 18 hours, but the initial charge should be 24 hours.

Using the Headphone System

Switching On/Off

Switch the headphones on using the ON/OFF switch. If the audio source is off for 5 minutes, the system enters standby mode.

Pairing

The headphones and transmitter are factory pre-paired. To pair additional headphones, hold them within 30 cm of the transmitter while both are switched on.

Adjusting Volume and Sound Modes

Use the volume control on the right ear cup to adjust the level. Use the MODE switch on the transmitter to select between Neutral (unchanged), Music (boosted bass), or Speech (boosted frequency range for clarity) modes.

Care and Maintenance

Switch off and disconnect the transmitter before cleaning. Use only a soft, dry cloth. Clean charging contacts with a cotton swab. Replace ear pads periodically for hygiene; they can be twisted off and on in the same manner as the battery compartment cover.

Troubleshooting

If you experience issues, ensure the transmitter is connected to power and the audio source is active. If the sound quality deteriorates, you may be out of range (up to 60 meters). If the connection is lost, switch the headphones off and on again to re-establish the link.

Specifications

The system uses Bluetooth LE Audio technology with a range of up to 60 meters. The headphones provide up to 18 hours of operating time. The transmitter operates on 9V DC power.