Custom made and designed Subwoofer for the superb Voix MPX iPod Speaker system. The BX2 Sub adds an expansive bottom-end to the sound in any environment.Compatible with the Voix MPX speakersBX2 will add yet more dimension to your MPX unit delivering deep thumping bass when you want to get low! The design matches the modernity of the MPX speakers it's no boring box! Gloss black and charcoal surfaces make it stylish and understated and 70W of power gives the kick to back up the looks.It is simple to use and has bass adjustable controls on the main control interface.