Bang & Olufsen Beoplay H4 vs Bang & Olufsen Beoplay H9i

Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience. Show more

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.

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

Resistance to sweat makes it ideal for use while doing sports.

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The device comes with its own special case or pouch, which is useful for safe transportation.

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

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The highest frequency at which device produces audio. The higher the high-frequency response, the clearer and crispier the treble. Show more

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

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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.

The device's battery life (when in use) as given by the manufacturer. With a longer battery life you have to charge the device less often.

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The time it takes to fully charge the battery.

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The battery can be recharged and used over again.

An indicator shows you when the device has low battery.

The USB Type-C features reversible plug orientation and cable direction.

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The device can connect at a greater distance via Bluetooth or infrared to another device.

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Wireless devices allow users more freedom of movement.

A standard 3.5mm male connector is suitable for use with all MP3 players and computer sound cards.

Device supports fast Bluetooth pairing using NFC so it can communicate with other devices over Bluetooth. You can fastly pair devices without entering a code by simply holding one device next to the device with which it is to be paired.

The device can connect to Wi-Fi.

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A headset is one headphone or pair with a built-in microphone. Headsets can be used for apps that require communication i.e. Skype, games with voice chat, mobile phones, etc.

There is a control panel on the device body, so you can easily access the volume control or remote without having to interact with a cable or another device it's connected to.

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

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There is a control panel on the cable, so you can easily operate the device without having to interact with it.

An accelerometer is a sensor used to measure the linear acceleration of a device. A common application is detecting when a device changes between vertical and horizontal positions.

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