Oh, sure -- you've got at least 893.1 options (at last count, anyway) when it comes to noise cancelling headphones for your iDevice, but do any of those plug directly into the dock connector instead of requiring a separate battery? Exactly. That's the claim to fame for Blackbox's i10, a new set of earbuds that rely on power from your iPod or iPhone in order to achieve that active...
“I'm not a high-end hifi guy, but I own a few pairs of headphones and earbuds so I'm capable of telling my experience. The Carbo Tenore has a generally dark sound signature, but that doesn't mean anything sounds recessed. They have decent bass as BAs, the high is not sibilant, the mid is good. The soundstage is not large. For around 35 bucks, you can't go wrong with these if the sound signature...” --tonyjiang
“A mids-focused specialist with a little bass thump and smooth, relaxed treble (recessed, but still has some detail). Not an especially engaging sound (a little too relaxed maybe). Decent across genres, but tend to congestion during busy/noisy passages. I find them particularly useful for low volume podcast legibility, though with podcasts that are poorly leveled, subject to intrusive volume...” --Raketen