The simplest form of a speaker, unimaginably, is a paper cup. From the looks of it, it does fit well amongst your working area, and especially so when accompanied with an iPod. And you shouldn't have any qualms about its capabilities in decibel levels, being in the shape of a loud-speaker. And of course, you wouldn't need to worry too much about killing another of your speakers over your incessant music blasts, as it certainly wouldn't hurt your pockets.