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“THX tune-up” is an iOS app for iPad (2 and higher), iPad mini, iPhone (4 and higher), and iPod touch (Gen 4 and higher). To commemorate the Big Game and assist as many as possible of the 7.5 million people expected to purchase a new set just for the occasion, THX is offering the app as a free download from the iTunes store through Monday, February 4th. After that, it’ll cost $1.99. An Android version is expected to be released next spring.

Before your inner geek gets too worked up, neither the THX tune-up app nor any set-up disc...

I've dreamed of a bicycle sound system for years. I've tried several, even jury-rigged a few of my own, but always ended up discarding them 'cause they sounded lousy, fell apart, or were just a hassle to deal with. But two trends might make decent cycle-sound systems possible.

First there's Bluetooth, which lets you stream MP3s, Internet radio, and podcasts from your smartphone. Then there's the recent explosion in relatively high-quality miniature sound systems like the Soundmatters FoxL and the Jawbone Jambox.

The $99 NYNE Multimedia NB-200 is one of the first Bluetooth speakers designed specifically for cycling. Its driver layout-two 1.5-inch drivers with a 3- by 1.5-inch passive radiator-is somewhat similar to that of a FoxL. While you can get a bike mount for the FoxL, the NB-200 was designed from scratch as a bike speaker. The enclosure has slots that match up with a couple of handlebar clips.