Sennheiser ACCENTUM Wireless Headphones

Product Overview

The Sennheiser ACCENTUM are wireless, around-ear headphones designed for immersive audio experiences. They feature Active Noise Cancellation (ANC) and Transparency Mode, Bluetooth 5.2 connectivity, and a comfortable, adjustable design.

Key Components:

• 1. Earcup: The part that covers the ear.
• 2. Headband: Infinitely adjustable for a secure fit.
• 3. Headphone Housing: The main body of the headphone.
• 4. Microphone (x2): For voice calls.
• 5. LED Indicator: Displays status information.
• 6. USB-C Connector: For charging and wired audio/data connection.
• 7. Volume + Button: Increases volume.
• 8. Music/Sound Control Button: Controls music playback and calls.
• 9. Volume - Button: Decreases volume.
• 10. Main Button: Powers the headphones on/off, activates language assistant, and initiates Bluetooth pairing.
• 11. R/L Indicators: Mark the right and left earcups.
• 12. ANC Microphones: Two outward-facing and two inward-facing microphones for active noise cancellation.

Important Safety Instructions

General Safety:

• Read the entire user manual before use.
• Include the manual if transferring the product to a third party.
• Do not use if the product appears damaged or emits unusual sounds.
• Use only in environments permitting wireless Bluetooth transmission.
• Hearing Protection: Avoid listening at high volumes for extended periods to prevent hearing damage. Sennheiser headphones provide optimal sound quality at low to medium volumes.
• Magnets and Implants: This product generates a strong magnetic field. Maintain a minimum distance of 10 cm (4 inches) from pacemakers, ICDs, or other implanted medical devices.
• Keep the product, packaging, and accessories away from children and pets to prevent accidents (choking hazard).
• Do not use in environments requiring special attention (e.g., busy roads), as active noise cancellation may block important ambient sounds.
• Product Protection: Keep the product dry and away from extreme temperatures (0°C to 40°C operating range) to prevent corrosion or deformation. Do not submerge in liquid.
• Do not cover the ANC microphones, as this can cause unusual sounds and impair ANC performance.
• Use only accessories supplied or recommended by Sonova Consumer Hearing.
• Clean with a soft, dry cloth only.

Lithium Battery Safety:

• WARNING: Batteries may leak if not handled properly, risking explosion, heat, fire, smoke, gas, and health/environmental hazards.
• Use only approved rechargeable batteries and chargers.
• Do not charge unattended.
• Charge only between 10°C and 40°C, away from flammable materials.
• Do not charge in humid environments. Ensure the charging socket is dry and clean.
• Do not expose to temperatures above 60°C (140°F); avoid direct sunlight and do not dispose of in fire.
• Turn off the device after use.
• Recharge periodically (approx. every 3 months) if not in use for extended periods.
• Avoid prolonged skin contact with charging components while connected to mains power, as they may heat up and cause irritation.
• Dispose of damaged products and batteries at designated collection points for recycling.

Data Collection and Firmware Updates:

• The product stores settings like volume and paired devices for operation; this data is not sent to Sonova Consumer Hearing.
• Firmware can be updated via the Sennheiser Smart Control app or internet. Data sent for updates includes hardware identifiers, firmware version, OS, and app version.

Use in Humid Environments:

• Protect headphones from moisture (rain, humidity, sweat).
• Do not use in rain, snow, or while bathing. Avoid pools, saunas, or activities involving high humidity (e.g., dishwashing).
• Do not store in airtight containers with wet items or items that cause condensation.
• Never charge wet headphones. Ensure the charging port is dry.
• If headphones become damp or wet: Dry with a cloth and air dry for at least 24 hours at room temperature before use or charging. Do not use if damaged.

Correct Use:

• Headphones are for Bluetooth audio (music, calls). Misuse is defined as using them differently than described.
• Sonova Consumer Hearing is not responsible for misuse, unauthorized accessories, or damage from incompatible USB devices.
• Sonova Consumer Hearing is not liable for connection failures due to battery issues or Bluetooth range limitations.
• Comply with local regulations.

Package Contents

• ACCENTUM Wireless Headphones
• USB-C to USB-A Cable (approx. 1.2 m)
• Quick Guide
• Safety Guide
• Compliance Sheet

Detailed operating instructions and further information are available online at www.sennheiser-hearing.com/download. The Sennheiser Smart Control app is available for headphone settings and functions at www.sennheiser-hearing.com/smartcontrol. Accessories can be found at www.sennheiser-hearing.com/accentum.

Getting Started

1. Charging the Battery: The battery is not fully charged upon delivery. Charge fully before first use. Connect the USB-C cable to the headphones and the USB-A end to a power source. The LED indicator will show charging status.
2. Connecting to a Bluetooth Device: Pair the headphones with your smartphone or other Bluetooth device. When first activated with an empty pairing list, the headphones automatically enter pairing mode.
3. Smart Control App: Download and install the Sennheiser Smart Control app for full control over settings, EQ, and more. Connect your smartphone to the headphones via Bluetooth and launch the app.
4. Wearing and Adjusting: Adjust the headband for a comfortable and secure fit. Ensure the earcups fully cover your ears for optimal sound quality and noise isolation.

Using the Headphones

Battery and Charging:

• The headphones have a built-in battery that takes approximately 3 hours to fully charge.
• Charging time may vary based on the power source and ambient temperature.
• The LED indicator shows charging status: Red (0-20%), Yellow (20-90%), Green (90-100%). A solid green light for 5 minutes indicates a full charge.
• A "Recharge headset" voice prompt will alert you when the battery is low.
• You can listen to music or make calls while charging, though it may take longer.
• Use the supplied USB cable and a standard USB power supply.
• Dispose of the product and its battery separately at the end of their life.

Bluetooth Wireless Connection:

• The headphones are compatible with Bluetooth 5.2. They support high-quality audio codecs like aptX HD and AAC.
• Paired devices connect automatically upon activation. The headphones can store up to six paired device profiles.
• Audio playback is only possible from one device at a time.
• To pair: Ensure headphones are off. Press and hold the main button for 3 seconds to turn on, then press and hold for 5 seconds to enter pairing mode (LED flashes white/red). Activate Bluetooth on your device, search for "ACCENTUM", and connect. A successful pairing is confirmed by voice prompts and a white LED flashing 3 times.
• If no connection is made within 2 minutes, pairing mode ends.

Changing Connections: Use the Smart Control app to switch audio connections between paired devices.

Disconnecting: Disconnect from your Bluetooth device's settings. A "No connection" prompt will be heard.

Smart Control App:

• Download the free Sennheiser Smart Control app from your device's app store.
• Connect headphones via Bluetooth and launch the app to access all features, including EQ, ANC settings, and firmware updates.

Turning On/Off:

• On: Press and hold the main button for 3 seconds.
• Off: Press and hold the main button for 3 seconds.

Active Noise Cancellation (ANC) and Transparency Mode:

• ANC: Reduces ambient noise for an immersive listening experience. Effective for constant, low-frequency sounds.
• Transparency Mode: Allows you to hear ambient sounds and conversations without removing the headphones. Useful for announcements or brief interactions.
• Switch between ANC and Transparency mode by pressing the main button twice.
• Advanced settings for ANC and Transparency Mode, including "Automatic pause" and wind noise reduction, can be configured in the Smart Control app.

Music Playback:

• Control playback (play/pause, next/previous track) using the music/sound control button.
• Functions are available via Bluetooth or USB connection.

Making Calls:

• Answer, end, or reject calls using the main button or music/sound control button.
• Mute the microphone by pressing the main button once during a call.
• Sidetone feature allows you to hear your own voice during calls, adjustable via the Smart Control app.

Voice Assistant:

• Activate your smartphone's voice assistant (Siri, Google Assistant) by pressing the main button once.

Sound Effects/Equalizer:

• Customize sound profiles using the equalizer in the Smart Control app.

Bluetooth/Airplane Mode:

• Turn off Bluetooth by pressing the main button 5 times. This activates Airplane Mode. Press again 5 times to re-enable Bluetooth.

Connecting via USB Cable:

• Connect via the included USB cable for audio playback and charging. Set the headphones as the default audio device on your computer or mobile.

Storing and Transporting:

• Store in a clean, dust-free place, away from sharp objects. Avoid carrying in bags with sharp items to prevent damage to earcups.

Maintaining and Caring:

• Clean with a soft, dry cloth. Avoid liquids and solvents.
• Keep the charging socket clean.

Replacing Earcups:

• Replacement earcup cushions are available for purchase. Follow instructions to remove old and attach new cushions.

Firmware Updates:

• Install firmware updates via the Sennheiser Smart Control app for optimal performance.

Troubleshooting

If you experience issues:

1. Reset: Press and hold the main button for 20 seconds.
2. Firmware Update: Connect to the Smart Control app and install the latest firmware.
3. Factory Reset: Reset headphones to factory settings via the Smart Control app.
4. FAQ: Consult the FAQ section on the Sennheiser website (www.sennheiser-hearing.com/download).
5. Contact Support: If problems persist, contact a Sonova Consumer Hearing partner.

Bluetooth Range: If you leave the Bluetooth range, the connection may be lost ("Lost connection" prompt). The connection will re-establish automatically when you return to range.

Technical Data

• Model: ACAEBT
• Type: Bluetooth® Around-ear, closed
• Driver: 37 mm
• Frequency Response: 10 Hz - 22,000 Hz (-10 dB)
• SPL: 106 dB (1 kHz/0 dBFS)
• Distortion: < 0.3% (1 kHz, 100 dB SPL)
• Microphone: MEMS, 50 Hz - 8,000 Hz, 2 omnidirectional mics
• Power: Built-in Li-ion battery (800 mAh, 2.96 Wh). USB charging: 5V, 700mA max.
• Battery Life: Up to 50 hours (music, ANC on).
• Charging Time: Approx. 3 hours.
• Operating Temperature: 0°C to +40°C.
• Bluetooth Version: 5.2, Class 1.
• Bluetooth Frequency: 2402 MHz - 2480 MHz.
• Supported Codecs: aptX™ HD, AAC, SBC.
• Weight: Approx. 222 g.

Manufacturer's Statements

Warranty: Sonova Consumer Hearing GmbH provides a 12-month warranty. Details are available at www.sennheiser-hearing.com/warranty.

Spare Parts and Service: Limited availability. Products are generally covered by a 2-year limited warranty. Refer to www.sennheiser-hearing.com/warranty-conditions for details.

Compliance: Meets EU General Product Safety Regulations, RoHS, and Radio Equipment Directives. Full EU declaration of conformity is available at www.sennheiser-hearing.com/download.

Disposal: Do not dispose of this product, batteries, or packaging with household waste. Follow local regulations for separate collection and recycling.

Trademarks: Apple, Siri, App Store are trademarks of Apple Inc. Android, Google Play are trademarks of Google Inc. Bluetooth® word mark and logos are registered trademarks of Bluetooth SIG, Inc. Qualcomm aptX™ is a product of Qualcomm Technologies International, Ltd. Other product and company names may be trademarks of their respective owners.