Koss Pro4S
Koss Pro4S
Top 51%646 points
Top 51%
Top specs and features

Koss Pro4S review: 12 facts and highlights

1. highest frequency

The highest frequency at which device produces audio. The higher the high-frequency response, the clearer and crispier the treble.
25000Hz
Sony MDR-Z1R: 120000Hz

2. lowest frequency

The lowest frequency at which the device produces audio. The lower the low-frequency response, the stronger and juicier the bass.
10Hz
Sony MH1CBLK: 1Hz

3. weight

181g
Sony MDR-EX150AP: 3g

4. has sound isolation/passive noise reduction

The device sits tightly in place, creating an acoustic seal which reduces background noise and prevents your music from leaking out.
Koss Pro4S
45% have it

5. impedance

Impedance is the device’s electrical resistance to the current being pushed through it. The lower the impedance, the easier it is to get higher volume and requires less power.
35 Ohms
Flips Solo 2 Social: 4 Ohms

6. sound pressure level

Devices with a higher sound pressure level are generally louder when supplied with any given audio source.
99dB/mW
AKG K553 Pro: 144dB/mW

7. has a detachable cable

With a detachable cable you can use alternative cables, and if the cable is pulled it will pop out instead of breaking.
Koss Pro4S
38% have it

8. can be folded

Folding devices are good for transporting as they take up less space in your bag.
Koss Pro4S
30% have it

9. has an over-the-ear form

Comfortable full-size form with earcups that fully enclose your ears. This model is loved for its increased sound isolation and the fact that it won't leak sound to your neighbors. It offers potential for maximum bass and loudness levels.
Koss Pro4S
39% have it

10. travel bag is included

The device comes with its own special case or pouch, which is useful for safe transportation.
Koss Pro4S
64% have it

11. cable length

A long cable ensures more freedom of movement.
1.4m
Pioneer SE-A1000: 6m

12. has a coiled cord

A coiled cord typically offers more flexibility as it can be extended, and taken outside for example.
Koss Pro4S
7% have it

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