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Once, all you needed to enter the receiver business was audio-engineering chops, competence in packaging efficiency, and a sharp pencil over the bottom line. That was then — before the digital audio/video revolution and the birth of the A/V receiver as we know it. Today, you need at least as much smartsin the computer, DSP, and software/firmware fieldsas you do in plain ol’ audio, a fact that has thinned,and continues to thin, the herd of receiver makers noticeably.

For a time, there was Kuro, and Kuro was king. Kuro made other TVs envious of its awesomeness. Then. . . there was no Kuro. TV reviewers wept; everyone else bought LCDs. Under-intelligenced “pundits” foretold the end of plasma TVs — but Panasonic, Samsung, and LG quietly coughed and politely said, “Umm, we still make plasmas.”

RSL Speaker Systems is the current manifestation of Rogersound Labs, a SoCal company that goes back a few years — 30 or so, in fact. Like many speaker makers, RSL got its start through garage tinkering, in this case by Howard Rodgers, owner of a well-known retail chain of the same name. (How the “d” got dropped from the company name is a story for another day.)

Despite a long, successful run, the original RSL, again like many other speaker companies, eventually faded away. But after regaining rights to the company name just last year, the firm was reincarnated after a long hiatus by its founder and his family.

My 13-year-old son is an avid skier, skateboarder, and longboarder. From time to time, he’ll document his activities with a Flip camera.

There are two issues with the Flip, however. First, you have to hold it in your hand. Second (and more important), Flip is out of business.