HD 250BT On-ear headphones Instruction manual Use the search function, the navigation (left) or the following links: Start “Product overview” “Getting started” “Using the headphones” “FAQ/If a problem occurs ...” “Specifications” Sennheiser electronic GmbH & Co. KG Am Labor 1 30900 Wedemark Germany www.sennheiser.
Important safety instructions 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.
Important safety instructions Only use rechargeable batteries and chargers recommended by Sennheiser. Only charge the product / rechargeable batteries at ambient temperatures between +10 °C to +40 °C/50 °F to 104 °F. Do not heat the product / rechargeable batteries above +70 °C/140 °F. Avoid exposure to sunlight and do not throw the product / rechargeable batteries into fire. When not using the product / rechargeable batteries for extended periods of time, charge them regularly (about every three months).
Important safety instructions Intended use/Liability These headphones have been designed as an accessory for Bluetooth compliant devices. They are intended for wireless audio communication such as music playback and phone calls via Bluetooth wireless technology. It is considered improper use when the product is used for any application not named in the corresponding product documentation.
Package contents Package contents HD 250BT on-ear headphones USB cable with USB-C connector Quick guide Safety guide Online you can find: • this detailed instruction manual and additional information www.sennheiser.com/download • the Sennheiser Smart Control app for configuring the headphones and for additional functions www.sennheiser.com/smartcontrol A list of accessories can be found on the HD 250BT product page at www.sennheiser.com. Contact your local Sennheiser partner: www.sennheiser.
Product overview Product overview Model: HD 250BT 1 3 2 2 Right R Left L 4 5 9 6 7 8 Headband Ear cups Ear pads Microphone USB-C socket for charging Volume – button (volume down) On/off button pressing for 3 seconds activates the Bluetooth pairing mode Volume + button (volume up) LED 6 | HD 250BT
Product overview Overview of the LED display During operation LED Meaning; the headphones 3x 3x flashes blue are switched on flashes blue 3x are connected to a device via Bluetooth flashes red/ blue are in Bluetooth pairing mode flashes red 3x are not connected to a device via Bluetooth or the connection has been lost During phone calls LED Meaning flashes blue Incoming call flashes purple Incoming call flashes red Incoming call and the rechargeable battery of the headphones is almost emp
Product overview Notes on voice prompts The headphones output voice prompts for various functions (see examples below).
Getting started Getting started 1. Charging the rechargeable battery The headphones' rechargeable battery is not fully charged upon delivery. Before using the headphones for the first time, charge the rechargeable battery for a complete charging cycle without interruption (> 10). USB-C USB-A 2. Installing the Smart Control app on your smartphone The Sennheiser Smart Control app allows you to use all functions and settings of the headphones and to e.g.
Using the headphones Using the headphones Information on the rechargeable battery and the charging process The headphones have a built-in rechargeable battery. A complete charging cycle takes up to 3.5 hours. Before using the headphones for the first time, charge the rechargeable battery for a complete charging cycle without interruption. When the headphones are being charged, the LED lights up red (> 7). Once the headphones are fully charged, the LED lights up blue.
Using the headphones You can speed up the charging process by charging the headphones when they are switched off. Connecting the headphones to a Bluetooth device To be able to use the Bluetooth connection, you must register both devices (headphones and e.g. smartphone) once. This process is called pairing. If operation differs from the steps mentioned, also refer to the instruction manual of the Bluetooth device you are using.
Using the headphones Pairing the headphones with a Bluetooth device 1. Switch the headphones on (> 14) and place them close to the Bluetooth device (max. 20 cm). 2. Press and hold the on/off button for 4 seconds until you hear the voice prompt “Pairing”. The LED flashes red and blue. The headphones are in pairing mode. 3. Activate Bluetooth on your Bluetooth device. 4. Via the menu of your Bluetooth device, start the search for new Bluetooth devices.
Using the headphones Disconnecting the headphones from a Bluetooth device ▷ Via the menu of your Bluetooth device, disconnect the connection to the headphones. The headphones are disconnected from the Bluetooth device. You hear the voice prompt “Lost connection”. The headphones switch to standby mode. To delete the Bluetooth pairing list of the headphones, > 23.
Using the headphones Switching the headphones on WARNING Danger of hearing damage due to high volume levels! Listening at high volume levels can lead to permanent hearing defects. ▷ Before putting the headphones on, adjust the volume to a low level (> 17). ▷ Do not continuously expose yourself to high volume levels. 1. Press and hold the on/off button for 3 seconds. The LED flashes red/blue. If Bluetooth is activated on the headphones, you hear the voice prompts “Power on” and “Connected”.
Using the headphones Switching the headphones off 1. Press and hold the on/off button for 3 seconds. 2. You hear the voice prompt “Power off” and the LED flashes red 3x. The headphones switch off. “Power off“ Hold 3s Putting the headphones on and adjusting the headband For good sound quality and best possible wearing comfort, the headband can be adjusted to properly fit your head. ▷ Wear the headphones so that the headband runs over the top of your head.
Using the headphones Retrieving information on the battery charge status When the headphones are connected to your Bluetooth device, the battery charge status can be displayed on the screen of your smartphone (depending on the device and operating system used). The Smart Control app also displays the battery charge status. You can retrieve information on the battery charge status on the headphones by pressing the volume - button 1x.
Using the headphones Adjusting the volume WARNING Danger of hearing damage due to high volume levels! Listening at high volume levels can lead to permanent hearing defects. Toggling between the audio sources may cause enormous volume jumps that can permanently damage your hearing. ▷ Before putting the headphones on and before toggling between audio sources, adjust the volume to a low level. ▷ Do not continuously expose yourself to high volume levels.
Using the headphones Multi-function button Press 1x Function Plays or pauses music Playing the next track ▷ Quickly press the multi-function 2x. Multi-function button Press 2x Function Plays the next track in the playlist Playing the previous track ▷ Quickly press the multi-function 3x.
Using the headphones Accepting/rejecting/ending a call If your headphones are connected to a smartphone and you receive a call, you hear a ring tone in the headphones. If you are playing music when you receive a call, the music pauses until you end the call.
Using the headphones Adjusting sound effects/the equalizer To be able to use the sound effects/equalizer, you require the Smart Control app (> 13). ▷ In the Smart Control app, select the desired sound effects. You can use predefined presets or define your own settings. The sound effects are stored in the headphones. These sound settings are active even without using the Smart Control app, i.e. when you are using another Bluetooth device.
Care and maintenance Care and maintenance 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. ▷ Clean the parts of the product only with a soft, dry cloth. Replacing the ear pads For reasons of hygiene, you should replace the ear pads from time to time.
Care and maintenance Information on the built-in rechargeable battery Sennheiser ensures and guarantees that the rechargeable battery performs at its optimum upon purchase of the product. If, upon purchase or within the warranty period, you suspect that the rechargeable battery is obviously defective or if a charging error/battery error is displayed (> 7), stop using the product, disconnect it from the power supply system and contact your Sennheiser partner.
FAQ/If a problem occurs ... FAQ/If a problem occurs ... Current list of frequently asked questions (FAQ) Visit the HD 250BT product page at www.sennheiser.com/download 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.
FAQ/If a problem occurs ... Deleting the Bluetooth pairing list of the headphones 1. Deactivate Bluetooth on your smartphone. 2. Switch the headphones off. To do so, press and hold the on/off button for 3 seconds. 3. Switch the headphones on. To do so, press and hold the on/off button for 4 seconds. The LED on the headphones flashes red and blue. The headphones are in pairing mode. 4. Press and hold the volume + button for 3 seconds. The LED on the headphones flashes purple 3x. The pairing list is deleted.
Specifications Specifications Model: HD 250BT Wearing style Bluetooth® on-ear Ear coupling on-ear Transducer principle dynamic, closed-back Transducer 32 mm Frequency response 20 Hz to 22,000 Hz (-10 dB) Sound pressure level (SPL) 110 dB (1 kHz/0 dBFS) THD (1 kHz, 100 dB SPL) < 0.
Manufacturer Declarations 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.
Manufacturer Declarations aptX is a trademark of Qualcomm Technologies International, Ltd., registered in the United States and other countries, used with permission. Other product and company names mentioned in the user documentation may be the trademarks or registered trademarks of their respective holders.
