SENNHEISER CX Plus Wireless Earbuds Manual
Important safety instructions
- Read this instruction manual carefully and completely before using the product.
- Always include this instruction manual when passing the product on to third parties.
- Do not use the product if it is obviously defective or makes loud, unusual (whistling or beeping) noise.
- Only use the product in environments where Bluetooth wireless transmission is permitted.
Preventing damage to health and accidents
- Protect your hearing from high volume levels. Permanent hearing damage may occur when headphones are used at high volume levels for long periods of time. Sennheiser headphones sound exceptionally good at low and medium volume levels.
- Do not insert the earphones too deep into your ears and never insert them without ear adapters. Always remove the earphones slowly and carefully from your ears.
- The product generates stronger permanent magnetic fields that could cause interference with cardiac pace- makers, implanted defibrillators (ICDs) and other implants. Always maintain a distance of at least 3.94″/10 cm between the product component containing the magnet (earbuds and charging case) and the cardiac pacemaker, implanted defibrillator, or other implant.
- Keep the product, accessories and packaging parts out of reach of children and pets to prevent accidents. Swallowing and choking hazard.
- Do not use the product in an environment that requires your special attention (e.g. in traffic). Especially the product’s active noise cancellation can make ambient noise inaudible or drastically change the perception of acoustic warning signals.
WARNING
If abused or misused, rechargeable batteries may leak. In extreme cases, they may even present a risk of:
- explosion,
- fire development,
- heat generation,
- smoke or gas development.
Package contents
Online you can find:
- this detailed instruction manual and additional information (www.sennheiser.com/download)
- the Sennheiser Smart Control app for configuring the head-phones and for additional functions (www.sennheiser.com/smartcontrol)
Product overview
Charging case
Model: CXPLUSTW1 C
- LED displays the charging process/charge status of the rechargeable battery of the charging case or of the earbuds (when inserted into the charging case).
- Input for USB-C connector for charging the rechargeable batteries
- Built-in rechargeable battery for charging the earbuds on the go
- Type plate
- Charging compartment for the left earbud L
- Magnetic holders
- Charging compartment for the right earbud R
- Charging contacts
- Touch control panel
- Changeable silicone ear adapters
- Left earbud L
- Status LED
- Infra-red carrying senor
- Magnetic holders
- Charging contacts
- Microphones for the active noise cancellation ANC, for the perception of ambient noise (“Transparent Hearing”) and for phone calls
- Right earbud R
- Built-in rechargeable battery
Getting started
- Waking up the earbuds and the charging case and charging the rechargeable batteries.
Upon delivery, the rechargeable batteries of the earbuds and the charging case are in sleep mode and have to be woken up by connecting them to a power source once.- Insert the earbuds into the charging case.
- Connect the USB-C cable to the charging case and to a USB power source (> 14). The earbuds and the charging case are woken up and the rechargeable batteries are being charged. The earbuds are now ready for use.
Upon delivery, the rechargeable batteries of the earbuds and the charging case are in sleep mode and have to be woken up by connecting them to a power source once.Using the earbuds
Information on the rechargeable battery, the charging process and the first use The earbuds and the charging case each have a built-in rechargeable battery. The charging case allows you to store the earbuds safely at all times while they are being charged.
| LED | Charging case WITH earbuds inserted | Charging case WITHOUT earbuds inserted | |
| pulses yellow | … earbuds and charging case are being charged | … charging case is being charged | |
| lights up green | … earbuds and charging case are fully charged | … charging case is fully charged | |
|
| flashes red | … a charging error/ battery error has been detected in at least one earbud (> 33) | … a charging error/ battery error has been detected in the charging case (> 33) |
NOTE:
If the LED does not light up:
- Clean the contacts on the earbuds and in the charging case (> 32).
- Charge the rechargeable batteries of the earbuds and the charging case (at least 30 minutes) until the LED lights up again.
Care and maintenance of the earbuds/charging case
CAUTION
Liquids can damage the electronics of the product. Liquids entering the housing of the product can cause a short-circuit and damage the electronics.
Keep all liquids far away from the product.- Do not use any solvents or cleansing agents.
- Only clean the charging case with a soft, dry cloth.
- Clean the earbuds with a slightly damp cloth.
- You can clean the silicone ear adapters under lukewarm running water. Let the ear adapters air dry at room temperature for at least 12 hours before re-attaching them to the earbuds.
- Clean the charging contacts on the earbuds and in the charging case from time to time using e.g. a cotton swab.
Keep all liquids far away from the product.FAQ/If a problem occurs …
Current list of frequently asked questions (FAQ) Visit the CX Plus True Wireless product page at www.sennheiser.com. There you will find a current list of frequently asked questions (FAQ) and suggested solutions.
Your question has not been answered or the problem persists?
If a problem occurs that is not listed in the FAQ section or if the problem cannot be solved with the proposed solutions, please contact your Sennheiser partner for assistance. To find a Sennheiser partner in your country, search at www.sennhe-iser.com/service-support.
Leaving the Bluetooth transmission range
Wireless calling and streaming are only possible in the Bluetooth transmission range of your smartphone. The transmission range largely depends on environmental conditions such as wall thickness, wall composition etc. With a free line of sight, the transmission range of most smartphones and Bluetooth devices is up to 10 meters.
Specifications
CX Plus True Wireless
Model: CXPLUSTW1, CXPLUSTW1 C, CXPLUSTW1 L, CXPLUSTW1 R
| Wearing style | True Wireless stereo earbuds |
| Ear coupling | ear-canal |
| Frequency response | 5 Hz to 21 kHz |
| Transducer principle | dynamic |
| Transducer size | 7 mm |
| Sound pressure level (SPL) | 114 dB (1 kHz/0 dBs) |
| THD (1 kHz, 94 dB SPL) | ≤ 0.08 % (1 kHz, 94 dB) |
| Noise cancellation | ANC technology with one pick-up microphone |
| Microphone principle | MEMS |
| Microphone frequency response | 100 Hz to 10 kHz |
| Microphone pick-up pattern (speech and ANC) | 2-microphone beamforming array for active noise cancellation per earbud |
| Power supply | built-in lithium rechargeable batteries, 3.7 V earbuds: 55 mash charging case: 400 – 420 mash USB charging via USB-C socket of the charging case: 5 V , 600 mA |
| Operating time | 8 hrs. with rechargeable battery of the earbud 24 hrs. with rechargeable battery of the charging case (test conditions: iPhone within 1 m distance, Bluetooth AAC codec, volume level 50 %, Transparent Hearing off, ANC off, no EQ settings) |
| Charging time of rechargeable batteries | approx. 1.5 hours for full charge approx. 10 minutes for 1 hour of music playback |
| Temperature range | operation: 0 to +40°C storage: –20 to +60°C |
| Relative humidity | operation: 10 to 80 %, non condensing storage: 10 to 90 % |
| Magnetic field strength | earbuds: 0.7 MT charging case: 39 MT |
| Ingress protection of the earbuds | splash proof (IPX4) |
| Weight | earbuds: approx. 6 g each charging case: approx. 35 g Both earbuds and charging case: 47 g |
Bluetooth
| Version | Bluetooth 5.2 compatible, class 1 |
| Transmission frequency | 2,402 MHz to 2,480 MHz |
| Modulation | GFSK, π/4 DQPSK, 8DPSK |
| Profiles | HFP, AVRCP, A2DP |
| Output power | 10 maw (max) |
| Codec | apt®, apt adaptive®, AAC, SBC |
| Device name | CX Plus True Wireless |
Manufacturer Declarations
Warranty
Sennheiser electronic GmbH & Co. KG gives a warranty of 24 months on this product.
For the current warranty conditions, please visit our website at www.sennheiser.com or contact your Sennheiser partner.
In compliance with the following requirements
- General Product Safety Directive (2001/95/EC)
- Compliant to Sound Pressure Limits according to country specific requirement.
