SubZero SZ-IEM Specifications, Tests and Review

Headphone type
In-ear
Connectivity
Wireless
Frequency Response
20 - 20000 Hz
Sensitivity
100 dB
Impedance
16 Ohm

Get the key specs, technical data, ratings and full review of SubZero SZ-IEM all in one place. Compare your selected model with other alternatives and give your decision on the best headphones a solid base with our comprehensive overview.

SubZero SZ-IEM Full Specifications and Details

design and dimensions sound quality cable battery and charging connections others

DESIGN AND DIMENSIONS SubZero SZ-IEM
Product Type Earphones - Bluetooth - wireless
Earpad Material Silicone, memory foam
Recommended Use Portable electronics

The wireless headphones SubZero SZ-IEM allow unrestricted movement, which increases the comfort of using the headphones. This feature is particularly popular with headphones for casual use. However, a certain limiting factor of wireless headphones compared to wired ones is a certain delay in sound transmission between the source and the headphones (but almost indistinguishable for the average user) and the need for regular charging. Unlike wired headphones, wireless headphones are charged separately.

The headphones are designed as in-ear headphones, which are inserted inside the ear to provide more or less isolation from ambient noise. The level of isolation may vary depending on whether the ambient noise isolation feature is present or not. One of the main advantages of these headphones compared to over-the-head ones is their stackability and easy portability.

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SOUND QUALITY SubZero SZ-IEM
Headphones Form Factor In-ear
Connectivity Technology Wireless
Wireless Technology Bluetooth
Noise Isolating Yes Better than 89 % of in-ear headphones rated.
Sound Output Mode Stereo
Frequency Response 20 - 20000 Hz Better than 53 % of in-ear headphones rated.
Max Input Power 2 mW
Sensitivity 100 dB Worse than 74 % of in-ear headphones rated.
Impedance 16 Ohm
Diaphragm 10 mm Better than 55 % of in-ear headphones rated.

The sound quality can be affected by many factors. When it comes to frequency range, a wider range will allow more detail to be heard during your listening session. However, it is important to note that the ability to perceive frequencies varies from person to person. The average person is able to hear frequencies in the range of 16 to 20 000 Hz. That is why headphone manufacturers usually focus on the 20 to 20 000 Hz range. If the lower values are lower, headphones are better able to reproduce bass tones, as these represent frequencies up to approximately 256 Hz. Conversely, values from 2 048 Hz upwards are treble. Thus, headphones with a high upper limit will provide a much more accurate reproduction of high tones. Headphones SubZero SZ-IEM have a frequency range of 20 - 20000 Hz. The SubZero SZ-IEM reaches the sensitivity values of 100 dB. The sensitivity of the headphones expresses the ability of the headphones to pick up the signal from the source and reproduce it with sufficient volume. The higher the sensitivity, the more easily the signal is converted to sound and the louder the headphones are able to play at a lower power consumption. It is important to remember that high listening volume can consume more energy from connected devices. So if you want to listen to music from your cell phone, it's better to choose headphones with low sensitivity to avoid draining your phone's battery too much. Headphones with a lower sensitivity value (around 85 dB) are better suited for listening in quiet environments, while medium values (around 90 dB) allow for quality listening in noisy environments such as public transport or cafes. Headphones with a high sensitivity value (100 dB or more) are designed for use in really noisy environments such as concerts

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. The maximum input power of these headphones indicates how many decibels they can receive from the device without any damage. For SubZero SZ-IEM, it is 2 mW.

The headphones are composed of many various components, one of the most important is the diaphragm. Diaphragm transforms the electrical signal into sound and therefore its quality affects the overall listening experience. There are three types of diaphragms: thin, medium-thick, and thicker. A thin 6 mm thick diaphragm responds quickly to high frequencies but less sensitively to bass. The medium-thick 10 mm diaphragm provides a balanced sound profile, allowing you to enjoy both bass and treble. The thicker 20 mm diaphragm is more sensitive to higher frequencies but has a poorer bass response. These headphones are equipped with the 10 mm.

You will also definitely appreciate the special design of the construction that creates a seal that further blocks out ambient noise and which contributes to undisturbed music listening.

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CABLE SubZero SZ-IEM
Cable Type Headphones cable - 1.2 m
Cable Length 1.2 m
Plated Connector Gold
BATTERY AND CHARGING SubZero SZ-IEM
Battery Type Headphone battery rechargeable
Battery Life 6 hour(s) Worse than 52 % of in-ear headphones rated.
Standby Time 100 hours Worse than 81 % of in-ear headphones rated.

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 SubZero SZ-IEM reaches up to 6 hour(s).

The standby battery life quoted by the manufacturer is 100 hours.

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CONNECTIONS SubZero SZ-IEM
Connector Type Headphones (mini-phone stereo 3.5 mm)
OTHERS SubZero SZ-IEM
Included Accessories Hard case, USB charging cable, 2 pairs of silicone ear tips, 2 pairs of foam ear tips
Service & Support Limited warranty - 2 years

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