AKG K551Koss QZ Pro
Top 55%600 points
Top 55%
Top 61%514 points
Top 61%
AKG K551
Koss QZ Pro
vs
Top specs and features

AKG K551 vs Koss QZ Pro: 16 facts in comparison

1. highest frequency

The highest frequency at which device produces audio. The higher the high-frequency response, the clearer and crispier the treble.
28000Hz
Sony MDR-Z1R: 120000Hz
20000Hz

2. lowest frequency

The lowest frequency at which the device produces audio. The lower the low-frequency response, the stronger and juicier the bass.
12Hz
Sony MH1CBLK: 1Hz
40Hz

3. 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.
AKG K551
Koss QZ Pro
48% have it

4. 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.
32Ohms
Flips Solo 2 Social: 4Ohms
32Ohms

5. sound pressure level

Devices with a higher sound pressure level are generally louder when supplied with any given audio source.
114dB/mW
AKG K553 Pro: 144dB/mW
90dB/mW

6. no battery needed

This device works without batteries. It weighs less and you don't have to worry about recharging or replacing the battery.
AKG K551
Koss QZ Pro
73% have it

7. can be folded

Folding devices are good for transporting as they take up less space in your bag.
AKG K551
Koss QZ Pro
31% have it

8. 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.
AKG K551
Koss QZ Pro
42% have it

9. has stereo speakers

Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.
AKG K551
Koss QZ Pro
75% have it

10. has a straight plug

A straight plug is better when the jack is on the top or bottom of your player.
AKG K551
Koss QZ Pro
53% have it

11. travel bag is included

The device comes with its own special case or pouch, which is useful for safe transportation.
AKG K551
Koss QZ Pro
64% have it

12. has active noise canceling/noise reduction

This type of device allows you to listen at lower volume levels, causing less ear fatigue as you don't have to crank up the volume to overcome background noise. Ideal for plane rides and morning commutes.
AKG K551
Koss QZ Pro
13% have it

13. has a 3.5mm male connector

A standard 3.5mm male connector is suitable for use with all MP3 players and computer sound cards.
AKG K551
Koss QZ Pro
87% have it

14. cable length

A long cable ensures more freedom of movement.
1.2m
Pioneer SE-A1000: 6m
1.2m

16. has a removable battery

The battery is removable and can be replaced by the user if broken.
AKG K551
Koss QZ Pro
6% have it

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