Manual of product MDR-RF4000K
Editorial note
The Sony MDR-RF4000K headphones stand out for their excellent sound quality, thanks to 40 mm speakers and a neodymium magnet, providing an immersive audio reproduction that will delight audiophiles. Their in-ear design also ensures prolonged comfort during use, although some people may experience discomfort during long listening sessions. In terms of battery life, these headphones offer up to 8 hours of continuous playback, which is satisfactory but may prove insufficient for those who wish to use them for extended periods without recharging. Additionally, while wireless connectivity is convenient with a range of 30 meters, the lack of RF connectivity limits compatibility with certain devices. The modern and sleek black design is an aesthetic asset, but it is unfortunate that this model is only available in this color. Finally, despite a good price-to-quality ratio, the nickel-metal hybrid (NiMH) battery technology may not meet the expectations of users accustomed to modern lithium-ion batteries. Overall, the Sony MDR-RF4000K are an excellent option for those seeking quality sound and listening comfort, while keeping in mind some of their limitations.Score details
User experience
The user experience is generally positive due to prolonged comfort of use, although some users may feel discomfort during long listening sessions.
Performance
The headphones offer excellent sound quality with a 40 mm speaker diameter and a neodymium magnet, ensuring immersive audio reproduction.
Battery life
The battery life is satisfactory with up to 8 hours of continuous playback, but this may be limited for users requiring extended use without recharging.
Design
The modern and sleek design in black is aesthetically pleasing, although it is only available in this color.
Features
The convenient wireless connectivity with a range of 30 meters is a plus, but the lack of RF connectivity may limit compatibility with some devices.
Value for money
The value for money is good, considering the audio performance and comfort, but the NiMH battery technology may not meet modern standards.
Advantages
Rich and immersive sound quality
Comfort for extended listening
Up to 8 hours of battery life
Wireless connectivity up to 30 meters
Modern and sleek design
Disadvantages
Battery life limited to 8 hours
Restricted RF connectivity for certain devices
Possible discomfort during long listening sessions
Available only in black
NiMH battery less efficient than lithium-ion
Technical Specifications MDR-RF4000K
General Information
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ModelMDR-RF4000K
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Brand
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Category
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Type
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SKU1213350
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MPN1213350
Battery
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Streaming audio playback8 h
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Battery technologyNickel-metal hydride (NiMH)
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Battery typeAAA
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Number of supported batteries2
Headphones/Earphones
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Reading unit40 mm
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Type of magnetNeodymium
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DHT, total harmonic distortion1 %
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Acoustic systemClosed
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Driver typeDynamic
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Headphone frequency10 - 22000 Hz
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Ear couplingSupra-aural
Connectivity
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Frequency band2.4 GHz
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Wireless router range30 m
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Connectivity technologyWireless
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RF ConnectivityYes
Representation / realization
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Product colorBlack
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Portable headset styleArch
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Product typeHeadphones
Frequently Asked Questions
At what level does the volume become excessive?
Is it possible to make hands-free calls with my headset?
What does noise cancellation mean?
What is Bluetooth?
Is the manual for the Sony MDR-RF4000K available in French?
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Presentation of product MDR-RF4000K specifications from brand Sony
General Information
The Sony MDR-RF4000K headphones, designed by the renowned brand Sony, are recognized for their superior sound quality and innovation in the audio field. This model, designated by the code MDR-RF4000K, promises remarkable performance and an enhanced listening experience. The EAN code, which includes several identifiers such as 0027242783591 and 4905524615937, allows for unique identification of the product in distribution systems.
Battery
The Sony MDR-RF4000K offers a continuous audio playback time of 8 hours, allowing users to enjoy their favorite tracks without frequent interruptions. Equipped with nickel-metal hybrid (NiMH) battery technology, these headphones combine performance and durability, making them suitable for daily use. They operate with two AAA batteries, ensuring prolonged use without compromising sound quality.
Headphones/Earphones
Featuring a 40 mm driver unit, the Sony MDR-RF4000K delivers immersive sound quality that will delight audiophiles. Thanks to neodymium magnets, these headphones ensure high-fidelity audio reproduction, with a total harmonic distortion of only 1%. Their closed acoustic system provides effective sound isolation, promoting total immersion in your music. With a frequency range of 10 to 22000 Hz and an in-ear coupling, these headphones offer prolonged comfort and an enriched listening experience.
Connectivity
The Sony MDR-RF4000K headphones operate on a frequency band of 2.4 GHz, ensuring effective and stable communication. Their wireless range reaches up to 30 meters, providing great freedom of movement without the constraints of cables. However, it is worth noting that these headphones do not support RF connectivity.
Representation / Realization
With their elegant black finish, the Sony MDR-RF4000K showcases a modern design that easily fits into a daily environment. These headphones are designed to provide an immersive audio experience while ensuring optimal comfort, whether at home or on the go.
