AKG K551Klipsch Reference S4i
Top 35%444 points
Top 35%
Top 30%476 points
Top 30%
AKG K551
Klipsch Reference S4i
vs
Top specs and features

AKG K551 vs Klipsch Reference S4i: 19 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.

2. lowest frequency

The lowest frequency at which the device produces audio. The lower the low-frequency response, the stronger and juicier the bass.

3. weight

293.1g lighter.

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.
AKG K551
Klipsch Reference S4i
49% 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.

6. sound pressure level

Devices with a higher sound pressure level are generally louder when supplied with any given audio source.

7. 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
Klipsch Reference S4i
73% have it

8. has an in-line control panel

There is a control panel on the cable, so you can easily operate the device without having to interact with it.
AKG K551
Klipsch Reference S4i
45% have it

9. can be folded

Folding devices are good for transporting as they take up less space in your bag.
AKG K551
Klipsch Reference S4i
31% have it

10. driver unit size

The driver unit is the component that produces sound in the device. Bigger drivers are more powerful and can produce better bass.

11. is used as a headset

A headset is one headphone or pair with a built-in microphone. Headsets can be used for applications which require communication i.e. Skype, games with voice chat, mobile phones etc.
AKG K551
Klipsch Reference S4i
34% have it

12. has stereo speakers

Devices with stereo speakers deliver sound that surrounds the user from left and right side, creating a richer sound and a better experience.
AKG K551
Klipsch Reference S4i
74% have it

13. has included ear pads

Allows you to change ear pads without buying new ones.
AKG K551
Klipsch Reference S4i
44% have it

14. has a straight plug

A straight plug is better when the jack is on the top or bottom of your player.
AKG K551
Klipsch Reference S4i
55% have it

15. travel bag is included

The device comes with its own special case or pouch, which is useful for safe transportation.
AKG K551
Klipsch Reference S4i
65% have it

16. number of microphones

More microphones result in better sound quality and enable the device to filter out background noise.

17. has an on-ear form

This device comfortably rests on top of your outer ears. As it doesn't block out everything from the outside world, it's preferred in places like office environments and recommended for outdoor activities.
AKG K551
Klipsch Reference S4i
22% have it

18. has an in-ear form

The in-ear device is ultracompact and lightweight, with little or no interference with earrings, spectacles, hats, or hairstyles. It is inserted in the ear canal itself and blocks out a lot of environmental noise. It has stronger bass tones and is unlikely to fall out of the ear.
AKG K551
Klipsch Reference S4i
33% have it

19. 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
Klipsch Reference S4i
87% have it

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