Table of Contents
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HD 450SE
Around-ear headphones
Model: SEBT4
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.com
Version: 05/21 A01
HD 450SE | 1
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Summary of Contents for Sennheiser HD 450SE
- Page 1 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.com Version: 05/21 A01 HD 450SE | 1...
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Page 2: Important Safety Instructions
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. ▷... - Page 3 This product stores individual settings such as the volume and the Bluetooth addresses of paired devices. This data is required for the operation of the product and is not transferred to Sennheiser or com- panies commissioned by Sennheiser and is not processed.
- Page 4 Sennheiser does not accept liability for damage arising from misuse or improper use of this product and its attachments/accessories. Sennheiser is not liable for damages to USB devices that are not con- sistent with the USB specifications. Sennheiser is not liable for damages resulting from the loss of con- nection due to flat or overaged rechargeable batteries or exceeding the Bluetooth transmission range.
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Page 5: Package Contents
• the Sennheiser Smart Control app for configuring the head- phones and for additional functions www.sennheiser.com/smart- control A list of accessories can be found on the HD 450SE product page at www.sennheiser.com. Contact your local Sennheiser partner: www.sennheiser.com/service-support. HD 450SE | 5... -
Page 6: Product Overview
Product overview Product overview HD 450SE model: SEBT4 Left Right Headband Ear cup joints Ear cups, steplessly adjustable On/off button for the headphones and the active noise cancellation ANC pressing for 4 seconds activates the Bluetooth pairing mode pressing 1x activates/deactivates ANC Input for analog audio cable;... - Page 7 Incoming call and the rechargeable flashes red battery of the headphones is almost empty If the LED does not light up immediately during charging, clean the charging socket and charge the headphones until the LED lights up again (> 11). HD 450SE | 7...
- Page 8 Rechargeable battery is empty. Recharge the headphones. Notes on beeps/acoustic signals The headphones output beeps/acoustic signals for the following functions. Acoustic signal Meaning/headphones... 2x low-pitched beep minimum volume is reached 2x high-pitched beep maximum volume is reached 8 | HD 450SE...
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Page 9: Getting Started
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. adjust the sound to your liking using the equalizer (> 15). - Page 10 Getting started 4. Putting the headphones on and adjusting the headband For good sound quality and best possible wearing comfort, the head- band can be adjusted to properly fit your head (> 17). 10 | HD 450SE...
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Page 11: Using The Headphones
(“Recharge headset”). Sennheiser recommends using the supplied USB cable and a com- patible standard USB power supply for charging the headphones. While the headphones are being charged, you can still listen to music or make phone calls. -
Page 12: Information On The Bluetooth Wireless Connection
If you pair the headphones with the ninth Bluetooth device, the saved connection profile of the least used Bluetooth device will be over- written. If you want to re-establish a connection with the overwritten Bluetooth device, you have to pair the headphones again. 12 | HD 450SE... - Page 13 Using the headphones Paired and connected Bluetooth device Paired Bluetooth device (currently not connected) HD 450SE | 13...
- Page 14 All active Bluetooth devices in the proximity of your Bluetooth device are displayed. 5. From the list of found Bluetooth devices, select “HD 450SE”. If necessary, enter the default pin code “0000”. 6. If pairing was successful, you hear the voice prompt “Connected”.
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Page 15: Installing The Smart Control App
Installing the Smart Control app To make full use of all the settings and functions of the headphones, you need to have the free Sennheiser Smart Control app installed on your smartphone. Download the app from the App Store or Google Play and install it on your smartphone. -
Page 16: Switching The Headphones On
If Bluetooth is activated and the headphones cannot find a paired Bluetooth device within a few minutes, you hear the voice prompt “Lost connection”. The LED flashes red 3x. The headphones switch to standby mode. 16 | HD 450SE... -
Page 17: Switching The Headphones Off
– your ears are comfortably covered by the ear pads, – you feel even, gentle pressure around your ears, – a snug fit of the headband on the head is ensured. For optimal sound quality, the ear pads must completely surround your ears. Left Right HD 450SE | 17... - Page 18 Voice prompt Meaning “Recharge headset” The rechargeable battery is empty. Recharge the rechargeable battery (> 11). “More than xx hours The remaining battery charge is playtime” displayed in hours. “Recharge headset“ “More than xx hours playtime“ 18 | HD 450SE...
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Page 19: Adjusting The Volume
When the maximum or minimum volume is reached, you hear a beep. You can also adjust the volume using the connected Bluetooth device. HD 450SE | 19... - Page 20 ANC is activated. To deactivate the active noise cancellation ANC: ▷ Press the on/off button 1x. If you are using Bluetooth: The LED flashes purple 3x. If Bluetooth is deactivated: The LED goes off. ANC is deactivated. 20 | HD 450SE...
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Page 21: Controlling Music Playback
Right Playing/pausing music ▷ Press the center of the 3-way multi-function button 1x. 3-way multi-function Function button Press 1x Plays or pauses music Playing the next track ▷ Slide the 3-way multi-function button backwards. HD 450SE | 21... - Page 22 3-way multi-function Function button Slide Plays the next track in the playlist backwards Playing the previous track ▷ Slide the 3-way multi-function button forwards. 3-way multi-function Function button Slide Plays the previous track in the playlist forwards 22 | HD 450SE...
- Page 23 ▷ Dial the desired number on your smartphone. If your smartphone does not automatically transfer the call to the headphones, select “HD 450SE” as the output device on your smartphone (see the instruction manual of your smartphone if necessary). 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.
- Page 24 Using the headphones 3-way multi-function button Function Press 2x Ends the active call and accepts an incoming call Press 2x Toggles between active call and call on hold 24 | HD 450SE...
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Page 25: Using The Voice Assistant/Voice Dialing
Amazon Alexa for the voice assistant button. 4. Start the Amazon Alexa app and select “Add Device”. 5. From the list of found devices, select “HD 450SE”. You can now use Amazon Alexa by pressing the voice assistant button on your headphones. HD 450SE | 25... -
Page 26: Adjusting Sound Effects/The Equalizer
• your audio source doesn't offer a Bluetooth connection. The functions for controlling music and/or calls or voice assistance are not possible. The active noise cancellation ANC can be fully used provided that the rechargeable battery is charged (> 20). 26 | HD 450SE... - Page 27 2. Pull the 2.5 mm jack plug straight out of the headphones' audio socket. 3. Pull the 3.5 mm jack plug of the audio cable straight out of the audio output of your smartphone. OFF ON Right 2.5 mm 3.5 mm Audio cable HD 450SE | 27...
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Page 28: Storing And Transporting The Headphones
Store the headphones in the carry case to prevent damage to the headphones when you are not using or transporting them. ▷ Fold up the headphones and place them in the carry case as shown in the illustration. 28 | HD 450SE... -
Page 29: Care And Maintenance
Do not return a product with a defective battery to your dealer or Sennheiser partner unless requested to do so. To find a Sennheiser partner in your country, search at www.sennheiser.com/service- support. -
Page 30: Installing Firmware Updates
Care and maintenance Installing firmware updates Firmware updates can be downloaded free of charge from the Inter- net using the Sennheiser Smart Control app. Sennheiser recom- mends to always install the latest firmware version to ensure the best performance of your product. - Page 31 If a problem occurs that is not listed in the FAQ section or if the prob- lem 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.sennheiser.com/service-support. Leaving the Bluetooth transmission range Wireless calling and streaming are only possible in the Bluetooth transmission range of your smartphone.
- Page 32 2. Simultaneously press and hold the on/off button and the 3-way multi-function button for 3 seconds. The LED flashes purple 3x. The Bluetooth pairing list is deleted. The headphones then stay in Bluetooth pairing mode. Hold Hold Hold “Pairing“ 32 | HD 450SE...
- Page 33 3. Insert the 3.5 mm jack plug of the audio cable into the audio output of your smartphone. The Bluetooth connection is deactivated. OFF ON Right 2.5 mm 3.5 mm Audio cable HD 450SE | 33...
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Page 34: Specifications
2,402 MHz to 2,480 MHz GFSK, π/4 DQPSK, 8DPSK Modulation Output power 12.6 mW (max) Profiles HSP, HFP, AVRCP, A2DP Codec aptX, aptX LL, AAC, SBC Device name HD 450SE LE-HD 450SE (Bluetooth Low Energy only) Number of active connections 34 | HD 450SE... -
Page 35: Manufacturer Declarations
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. In compliance with the following requirements •... - Page 36 Amazon, Alexa and all related logos are trademarks of Amazon.com, Inc. or its affiliates. Other product and company names mentioned in the user documen- tation may be the trademarks or registered trademarks of their respective holders. 36 | HD 450SE...
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Do you have a question about the HD 450SE and is the answer not in the manual?
Questions and answers
My headphones aren't recognised by my smartphone
The Sennheiser HD 450SE headphones may not be recognized by a smartphone due to several reasons:
1. Bluetooth Transmission Range: The headphones need to be within the Bluetooth transmission range (up to 10 meters with a clear line of sight). Environmental factors like wall thickness and composition can affect connectivity.
2. Firmware Issues: If the firmware update process fails or is incomplete, the headphones may not function properly. The Smart Control app should be used to check for and install firmware updates.
3. Improper Pairing: The headphones need to be correctly paired with the smartphone. If not connected properly via the Bluetooth settings, they may not be recognized.
4. App Configuration: If using voice assistants, the headphones may require setup in the corresponding app (e.g., Alexa or Google Assistant). Misconfiguration could lead to recognition issues.
If the problem persists, users should refer to the FAQ section on Sennheiser’s website or contact a Sennheiser support partner.
This answer is automatically generated