At only 52mm at its widest point when closed the X-Mini capsule speaker from XM-I adds some serious sound to your portable player in a very compact package. The X-Mini opens up with an accordion-like middle to 54.5mm tall to expose a patented vacuum bass chamber which is designed to “mimic the resonance of a sub-woofer,” according to the company.

It’s also built with s high-fidelity 2.4W speaker to give good sounds in the mid and high ranges as well. The X-Mini connects through a standard headphone jack and also …