1. Introducció
The Sennheiser CX Plus True Wireless Earphones (Model 509188) provide a high-quality audio experience with the convenience of true wireless technology. These earphones feature Active Noise Cancellation (ANC) for immersive listening and Transparent Hearing to stay aware of your surroundings. With customizable touch controls and a comfortable ergonomic design, they are suitable for various activities.

Imatge 1.1: Frontal view of the Sennheiser CX Plus True Wireless Earphones.
2. Configuració
2.1 Desembalatge i components inclosos
En obrir el paquet, assegureu-vos que hi hagi tots els components:
- Sennheiser CX Plus True Wireless Earphones (Left and Right)
- Estoig de càrrega
- Cable de càrrega USB-C
- Silicone Ear Adapter Sets (XS, S, M, L)
- Quick Guide and Safety Guide

Image 2.1: The product box for Sennheiser CX Plus True Wireless Earphones, showing the earphones and charging case.
2.2 Càrrega dels auriculars i l'estoig
Before first use, fully charge the earphones and the charging case. The earphones offer up to 8 hours of playback, with an additional 16 hours provided by the charging case, totaling up to 24 hours of battery life.
- Place the earphones into the charging case. Ensure they are correctly seated; magnetic contacts will guide them.
- Connecteu el cable de càrrega USB-C a la funda de càrrega i a una font d'alimentació.
- L'indicador LED de la caixa de càrrega mostrarà l'estat de càrrega.

Image 2.2: Earphones placed inside the charging case for charging.
2.3 Vinculació Bluetooth
Per connectar els auriculars a un dispositiu:
- Open the charging case. The earphones will automatically enter pairing mode (LEDs will flash blue and red).
- On your device (smartphone, tablet, etc.), go to Bluetooth settings and search for new devices.
- Select "Sennheiser CX Plus TW" from the list of available devices.
- Once connected, the earphones will confirm with an audible prompt.
2.4 Fitting the Earphones
Proper fit is crucial for sound quality and comfort. Experiment with the different sizes of silicone ear adapters to find the best seal for your ears.
- Introduïu suaument l'auricular al canal auditiu.
- Rotate the earphone slightly until it feels secure and comfortable.
- Ensure a good seal to maximize bass response and Active Noise Cancellation effectiveness.
3. Funcionament dels auriculars
3.1 Customizable Touch Controls
The CX Plus True Wireless Earphones feature customizable touch controls on each earbud. These controls allow you to manage audio playback, calls, and voice assistant functions. Default controls can be customized via the Sennheiser Smart Control app.

Image 3.1: A user wearing the Sennheiser CX Plus True Wireless Earphones, demonstrating their ergonomic design and touch control capability.
3.2 Cancel·lació activa del soroll (ANC)
Active Noise Cancellation reduces ambient noise, allowing for a more focused listening experience. This feature can be toggled on or off via the touch controls or the Smart Control app.
3.3 Transparent Hearing
Transparent Hearing allows you to hear your surroundings without removing the earphones. This is useful for situational awareness, such as hearing announcements or engaging in brief conversations. Activate or deactivate this mode using the touch controls or the Smart Control app.
3.4 Music Playback and Call Management
Use the touch controls to:
- Reproducció/pausa de música
- Saltar pistes (següent/anterior)
- Ajustar el volum
- Respondre / Finalitzar trucades
- Rebutja les trucades entrants
3.5 Assistent de veu
Access your device's voice assistant (Siri, Google Assistant) directly from the earphones using the customizable touch controls.
4. Manteniment
4.1 Neteja
Una neteja regular ajuda a mantenir un rendiment i una higiene òptims:
- Use a soft, dry cloth to wipe the earphones and charging case.
- Remove ear adapters and clean them with mild soap and water, then dry thoroughly before reattaching.
- Gently clean the charging contacts on the earphones and inside the case with a dry cotton swab.
4.2 Emmagatzematge
Quan no els utilitzeu, guardeu els auriculars a la seva funda de càrrega per protegir-los i mantenir-los carregats.
4.3 Resistència a l'aigua
The Sennheiser CX Plus True Wireless Earphones are rated IPX4 for splash resistance. This means they are protected against splashing water from any direction. They are not designed for submersion in water or exposure to heavy rain.
5. Solució De Problemes
Si teniu problemes, proveu els passos següents:
- Sense so o àudio intermitent:
- Assegureu-vos que els auriculars estiguin carregats.
- Comprova la connexió Bluetooth del dispositiu. Prova de tornar a emparellar-lo.
- Clean charging contacts if earphones are not charging.
- Apropa't més al dispositiu per evitar interferències.
- Auriculars no s'emparellan:
- Ensure earphones are in pairing mode (LEDs flashing blue/red).
- Desactiva i activa el Bluetooth al dispositiu.
- Oblida el dispositiu a la configuració de Bluetooth i intenta emparellar-lo de nou.
- Problemes de càrrega:
- Verify the USB-C cable is securely connected to both the case and power source.
- Prova un cable de càrrega o un adaptador de corrent diferent.
- Ensure charging contacts on earphones and case are clean and free of debris.
- Active Noise Cancellation Not Effective:
- Ensure a proper seal with the correct size ear adapters.
- Check if ANC is enabled via touch controls or the Smart Control app.
For further assistance, refer to the Sennheiser Smart Control app or the official Sennheiser support weblloc.
6. Especificacions
| Model | 509188 |
| Tecnologia de connectivitat | Sense fil (Bluetooth) |
| Col·locació de l'orella | A l'orella |
| Control de soroll | Cancel·lació activa del soroll |
| Resposta de freqüència | 21000 Hz |
| Sensibilitat | 114 dB |
| Format de micròfon | Integrat |
| Durada de la bateria (auriculars) | Fins a 8 hores |
| Durada total de la bateria (amb funda) | Fins a 24 hores |
| Temps de càrrega | Approximately 1.5 hours for full charge (earphones + case) |
| Nivell de resistència a l'aigua | IPX4 (resistent a esquitxades) |
| Pes de l'article | 47 grams |
| Material | Plàstic |
| Components inclosos | Cable, Ear Cushions, Wireless Charging Case |
7. Garantia i Suport
Sennheiser products are designed for reliability and performance. For detailed warranty information specific to your region and product, please refer to the warranty card included in your product packaging or visit the official Sennheiser weblloc.
For technical support, FAQs, and software updates, please visit the Sennheiser support portal:
You can also download the Sennheiser Smart Control app from your device's app store for additional features and customization options.





