Manual of product HA-KD9BT
Editorial note
The JVC HA-KD9BT headphones stand out for their excellent sound quality, thanks to a sensitivity of 85 dB and a frequency range of 20 to 20,000 Hz, providing an immersive and enjoyable listening experience. Their 12-hour battery life is a considerable asset for users wishing to enjoy their music without interruption. Additionally, the Bluetooth 4.2 connectivity ensures a fast and stable connection, offering appreciated freedom of movement. However, several drawbacks deserve mention. The absence of a standard 3.5 mm audio connector limits compatibility with certain devices, and the microphone without noise cancellation may hinder call quality, especially in noisy environments. The 3-hour charging time may seem long for some users, and the fact that these headphones are not foldable complicates their transport and storage. Regarding design, their lightweight of 120 g is an advantage for comfort during travel, although their lack of foldable functionality may pose a problem. Overall, the value for money is fair, considering the features offered, but the mentioned limitations may affect users' overall satisfaction.Score details
User experience
The user experience is very satisfactory thanks to the child-friendly design, offering safety and comfort, as well as convenient wireless connectivity.
Performance
The audio performance is excellent with a sensitivity of 85 dB and a frequency range of 20 to 20,000 Hz, providing clear and powerful sound.
Battery life
The 12-hour battery life is appreciated for extended use, although the 3-hour charging time may seem long for some users.
Design
The lightweight design of 120 g is convenient for transport, but the lack of a foldable feature can complicate storage.
Features
The Bluetooth 4.2 connection ensures good stability, but the absence of a standard 3.5 mm audio jack and noise-canceling microphone limits certain functionalities.
Value for money
The value for money is fair, considering the features offered, although some drawbacks may affect overall satisfaction.
Advantages
Clear and powerful sound quality
Up to 12 hours of battery life
Stable Bluetooth 4.2 connectivity
Secure design for children
Lightweight and easy to carry
Disadvantages
No 3.5 mm audio connector
Lack of noise-canceling microphone
3-hour recharge time
Non-foldable model for transport
Risk of hearing damage at high volume
Technical Specifications HA-KD9BT
Headphones/Earphones
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Headset sensitivity85 dB
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Impedance20 Ohm
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Reading unit30 mm
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Type of magnetFerrite
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Headphone frequency20 - 20000 Hz
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Ear couplingCircum-aural
Battery
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Streaming audio playback12 h
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Battery recharge time3 h
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Rechargeable batteryYes
Connectivity
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Bluetooth ProfilesA2DP
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Bluetooth modelAVRCP
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Wireless router rangeHFP
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Connectivity technologyHSP
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RF Connectivity4.2
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RF Connectivity10 m
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RF ConnectivityWireless
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BluetoothNo
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RF ConnectivityNo
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No
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Yes
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No
Representation / realization
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Designed for childrenYes
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Designed for childrenYes
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Product colorBlue, Red
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Volume orderTactile
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FoldableNo
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Portable headset styleArc
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Product typeHeadphones
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Recommended useMusic
Other features
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USB charger includedYes
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2.5 mm connectorNo
Weight and dimensions
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Weight120 g
Microphone
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Noise-cancelling microphoneNo
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Microphone typeUnavailable
Frequently Asked Questions
When does the volume become too high?
Is it possible to make hands-free calls with my headphones?
What is meant by noise cancellation?
What does Bluetooth technology consist of?
What is the weight of the JVC HA-KD9BT model?
What is the charging time for the JVC HA-KD9BT battery?
Is the JVC HA-KD9BT manual available in French?
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Presentation of product HA-KD9BT specifications from brand JVC
General Information
The JVC HA-KD9BT headphones, manufactured by the JVC brand, are designed to provide a quality audio experience. This model, referenced under the designation HA-KD9BT | HAKD9BTAE, is recognized for its optimal performance and user-friendly ergonomics, especially for young users. The EAN code 4975769455018 allows for unique identification of this product in the distribution system.
Headphones/Earphones
With a sensitivity of 85 dB, the JVC HA-KD9BT delivers clear and powerful sound, perfect for immersive listening sessions. Their impedance of 20 Ohm and their driver unit of 30 mm ensure superior audio quality. Thanks to the use of ferrite magnets, these headphones offer optimal acoustic efficiency. Covering a frequency range of 20 to 20,000 Hz, they allow for rich and varied sound reproduction. The in-ear design ensures sound immersion and prolonged comfort during use.
Battery
The JVC HA-KD9BT stands out with its impressive battery life, providing up to 12 hours of continuous playback, allowing you to enjoy your music without interruption. The 3-hour charging time is reasonable, and the rechargeable battery contributes to more sustainable and economical use.
Connectivity
Equipped with Bluetooth 4.2 technology, these headphones ensure a quick and stable connection with various devices thanks to a range of 10 meters. Supported Bluetooth profiles include A2DP, AVRCP, HFP, and HSP, facilitating compatibility with many devices. However, it is important to note that the JVC HA-KD9BT does not have standard audio connectors like 3.5 mm or 6.35 mm, which may limit their use with certain devices.
Representation / Performance
Featuring a built-in power button, the JVC HA-KD9BT is easy to use. Specifically designed for children, they ensure safety and comfort. Available in blue and red, their modern design catches the eye. The digital volume control allows for precise adjustment, although these headphones are not foldable, which may complicate their storage and transport. They are ideal for listening to music on a PC or laptop.
Other Features
A USB charger is included with the JVC HA-KD9BT, making them easy to use. However, these headphones do not have a 2.5 mm connector, which may restrict certain connection options.
Weight and Dimensions
Weighing 120 g, the JVC HA-KD9BT are lightweight and easy to wear, ensuring optimal comfort during use.
Microphone
These headphones are not equipped with a noise-canceling microphone, which may affect call quality in noisy environments. The type of integrated microphone is unspecified, but it remains practical for conversations without additional clutter.
