Sony MDR EX81SL/B Specifications, Tests and Review

Headphone type
Over-the-ear mount
Frequency Response
16 - 22000 Hz
100 dB/mW

Complete technical specifications, details, expert ratings and review of Sony MDR EX81SL/B. 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.

Sony MDR EX81SL/B Full Specifications and Details

design and dimensions sound quality cable connections others

Product Type Headphones - wired - 3.5 mm jack
Series Fontopia
Weight 13 g Better than 50 % of in-ear headphones rated.
Colour Black

The Sony MDR EX81SL/B are wired headphones. In the case of studio and professional DJ headphones, a wired connection is a standard and a necessity. In this case, connecting via cable reduces audio transmission delays and prevents unwanted battery drain as it would be in case of wireless headphones. The same is de facto true for gaming headsets. In case of headphones for normal music listening, the cable is rather a relic, although it still has its fans. However, the wireless option is much more popular for everyday use in today’s world. The weight of the headphones is 13 g.

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Headphones Form Factor Over-the-ear mount
Headphones Technology Dynamic
Connectivity Technology Wired
Sound Output Mode Stereo
Frequency Response 16 - 22000 Hz Better than 69 % of in-ear headphones rated.
Sensitivity 100 dB/mW Worse than 68 % of in-ear headphones rated.
Diaphragm 9 mm Worse than 65 % of in-ear headphones rated.
Magnet Material Neodymium

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 EX81SL/B offers a frequency range of 16 - 22000 Hz. The sensitivity parameter determines how sensitively the headphones can receive the signal from the source. The higher the sensitivity value, the louder the headphones will be able to play with less power consumption. In general, a higher listening volume also means a higher power load for the connected device. So if you're buying headphones to listen to music from your mobile phone, for example, this is relevant to think about as you don't want to drain your phone's battery too much. Lower values around 85 dB are more suitable for listening in more quiet environments (for example, at home or in the office). Medium values of around 90 dB can provide good listening quality in noisier environments (for example, on public transport or in cafés). Headphones with high sensitivity values of around 100 dB or more are designed for really noisy environments, such as concerts. The Sony MDR EX81SL/B has 100 dB/mW.

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 9 mm.

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Cable Type Headphones cable - 1 m
Plated Connector Gold
Connector Type Headphones (mini-phone stereo 3.5 mm)
Included Accessories Headphones earpads

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