Complete technical specifications, details, expert ratings and review of Sony MDR RF920RK. Find out how your chosen headphones stack up against the competition and whether they are the ones that best meet your expectations with the headphone comparison feature.
design and dimensions sound quality remote control cable battery and charging wireless link connections others
DESIGN AND DIMENSIONS Sony MDR RF920RK |
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Product Type | Headphones - wireless | |
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Weight | 270 g | Worse than 77 % of headphones rated. |
Recommended Use | Home audio | |
Bluetooth Range (Operating Distance) | 46 m | Better than 64 % of headphones rated. |
The Sony MDR RF920RK are wireless headphones. The wireless connection allows absolute freedom of movement and with that increases the comfort of using the headphones. This feature is very popular, especially when using headphones every day. The limiting factor of wireless headphones is a certain delay in the sound transmission between the source and the headphones (almost indistinguishable for a normal user), as well as the need to charge them (in the case of wired headphones, the headphones are recharged by connecting the cable itself). The maximum range of the headphones is up to 46 m. This range represents the distance from the sound source at which the headphones with wireless sound transmission can be used. However, the maximum range may be affected by obstacles such as walls or people, etc.
The design of the headphones is around the ears. Because of this design, the headphone envelops the entire ear and isolates the ear better from surrounding noise when listening compared to for example on-ear headphones. With that, they offer high-quality listening without interference. However, they are most likely heavier by design and less practical for frequent carrying. The weight of the headphones is 270 g.
SOUND QUALITY Sony MDR RF920RK |
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Headphones Form Factor | Full size | |
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Headphones Technology | Dynamic | |
Connectivity Technology | Wireless | |
Sound Output Mode | Stereo | |
Frequency Response | 20 - 20000 Hz | Better than 64 % of headphones rated. |
Diaphragm | PET - 30 mm | Worse than 76 % of headphones rated. |
Magnet Material | Ferrite |
The sound quality can be affected by many factors. When it comes to frequency range, the wider it is, the more detail you will hear when listening. However, the range a person can perceive is highly individual. The average person is able to perceive frequencies in the range of 16 to 20 000 Hz. So the most common frequency range you will see on the market is 20 to 20,000 Hz. Lower frequencies up to approximately 256 Hz are considered bass frequencies. Therefore, the lower the bottom value is, the better the headphones will reproduce bass. Conversely, values from approximately 2 048 Hz upwards are treble. That is why headphones with a high upper value will provide a much more accurate reproduction of high notes. Sony MDR RF920RK offers a frequency range of 20 - 20000 Hz.
An important part of these headphones is the diaphragm, which, simply put, converts the electrical signal into a sound. The thin diaphragm that is around 6 mm thick can react quickly to changes in the audio signal and improves high-frequency listening. However, it is less sensitive to bass. The medium-thick diaphragm of around 10 mm provides a fairly balanced sound profile, allowing you to enjoy both bass and treble. A thicker diaphragm of around 20 mm cannot react so quickly to changes in the sound signal, thus impairing bass listening. However, it is more sensitive to higher frequencies. This model features the PET - 30 mm.
REMOTE CONTROL Sony MDR RF920RK |
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Controls | Volume |
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CABLE Sony MDR RF920RK |
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Cable Type | Audio cable - 90 cm |
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BATTERY AND CHARGING Sony MDR RF920RK |
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Battery Type | Battery - AAA type - rechargeable - Nickel Metal Hydride | |
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Battery Life | 18 hour(s) | Better than 63 % of headphones rated. |
Power Device | Power adapter - external |
In terms of headphone battery life as a significant factor in the purchase decision, it depends on what you want to use the headphones for and potentially how often you will be able to recharge them. Headphones with up to a few hours of battery life are more suitable for home use as they will require more frequent charging. Headphones with a battery life of around 10 hours or more are already more suitable for commuting and shorter journeys. However, nowadays you can also find headphones on the market that have a battery life in the higher tens to hundreds of hours. In this case, you do not have to worry about your headphones simply running out of power on longer journeys, and you will not have to deal with constant recharging. The battery life of the Sony MDR RF920RK reaches up to 18 hour(s).
Show moreWIRELESS LINK Sony MDR RF920RK |
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Transmission Range | 46 m | Better than 59 % of headphones rated. |
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Modulation Type | FM | |
Radio Channel Qty | 3 | |
Radio Frequency Range | 913.5 - 914.5MHz |
CONNECTIONS Sony MDR RF920RK |
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Connector Type | Audio line-in |
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OTHERS Sony MDR RF920RK |
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Included Accessories | Transmitter unit |
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