Sony SRS-X33 review: specs and price

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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A speaker driver is an individual transducer that converts electrical energy to sound waves. More drivers may result in better sound quality.

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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.

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

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

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

An amplifier is integrated into the device. An audio amplifier takes a small signal and makes it bigger without making any other changes in it which results in better sound, so any sound source can be connected to speakers.

A passive radiator is a type of driver (speaker) that doesn't have a voice coil and a magnet. The sound vibrations produced by a passive radiator depend on its mass and the size of its enclosure. It is usually used in combination with a woofer to produce deep bass tones.

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

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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.

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The battery can be recharged and used over again.

An indicator shows you when the device has low battery.

The manufacturer offers a branded wireless charging kit. To charge the device, you simply put it down on its charging base.

How much power the device consumes when it's switched on.

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You can use the device with standard batteries instead of a power supply.

How much power the device consumes when shut down but still plugged in.

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An auxiliary input allows you to play other audio sources by connecting them through a simple audio connection like a 3.5mm jack, i.e for MP3 or portable DVD/CD player.

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

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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.

With more USB ports, you are able to connect more devices.

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Wireless devices allow users more freedom of movement.