JVC HA FX66-A Specifications, Tests and Review

Headphone type
In-ear
Connectivity
Wired
Frequency Response
10 - 23000 Hz
Sensitivity
101 dB/mW
Impedance
16 Ohm

Complete technical specifications, details, expert ratings and review of JVC HA FX66-A. 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.

JVC HA FX66-A Full Specifications and Details

design and dimensions sound quality cable connections

DESIGN AND DIMENSIONS JVC HA FX66-A
Product Type Earphones - wired - 3.5 mm jack
Weight 4 g Better than 92 % of in-ear headphones rated.
Colour Blue
Recommended Use Portable electronics

The JVC HA FX66-A 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 headphones are designed as in-ear. In-ear headphones are plugged directly into the ear and they normally offer complete or at least partial isolation from surrounding noise. The degree of isolation also depends on whether the headphones have an ambient noise isolation function. Their indisputable advantage is that they are more compact than over-the-head headphones. The weight of the headphones is 4 g.

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SOUND QUALITY JVC HA FX66-A
Headphones Form Factor In-ear
Connectivity Technology Wired
Sound Output Mode Stereo
Frequency Response 10 - 23000 Hz Better than 81 % of in-ear headphones rated.
Sensitivity 101 dB/mW Worse than 65 % of in-ear headphones rated.
Impedance 16 Ohm
Diaphragm 8.5 mm Worse than 82 % 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. JVC HA FX66-A offers a frequency range of 10 - 23000 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 JVC HA FX66-A has 101 dB/mW.

The device connected to the headphones also plays a role most times. The lower impedance value (approximately 100 to 150 Ohms) is suitable for playback from mobile phones, laptops or other portable players that do not have a powerful enough amplifier. The lower impedance will ensure that the required volume level is achieved with less power, thus extending the life of the player. However, at the same time, with lower impedance, there is more distortion of the sound. Headphones with a higher impedance of around 250 Ohms and above are then more suitable for playback from really powerful signal sources or using a headphone amplifier, otherwise the sound coming out of them might not be loud enough. At the same time, higher-impedance headphones will also ensure less distortion in the sound. In the case of these headphones, the impedance reaches the 16 Ohm value.

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 8.5 mm.

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CABLE JVC HA FX66-A
Cable Type Headphones cable - 1 m
Plated Connector Gold
CONNECTIONS JVC HA FX66-A
Connector Type Headphones (mini-phone stereo 3.5 mm)

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