Weight and Size—Weight shouldn’t really be a factor unless you plan to backpack with your portable speakers, but size is a consideration. Generally speaking, the larger the speakers, the better they’ll sound. Audio Quality—While portable speakers can’t rival larger speakers normally associated with home stereo systems, many offer amazing sound quality for their size. If possible, compare the specs for “harmonic distortion” (anything below 1% will be fine) and “frequency response,” which is usually shown in two numbers representing kilohertz (kHz). The smaller number will be the higher frequency and the larger number will be for the low-end (bass) frequency. Since the human ear cannot hear anything above 20 kHz, anything up to that number will be fine. For the lower, bass frequency, the larger the number the better.