Uber-high-end headphone manufacturer Etymotic is releasing a set of its personalised earphones for the iPhone and iPod. The hf2 Custom Fit headset integrates a microphone and 'answer call' button into the cord, so that you can use your iPhone without getting it out of your pocket.
A partnership with ACS (Advanced Communications Solutions) means that the headphones are custom-moulded to your ear. They stick a load of goo in your ear, which sets, and then produce a set of headphones the exact same shape as your inner ear.
That custom moulding ensures that a perfect fit is achieved, so the headphones are completely isolating. As a result, you can listen to music much more quietly and still get fantastic detail in the sound without damaging your hearing. They also stay put in your ear - they won't fall out if you're exercising.
I've tried the earphones myself, and they're incredible - I've spent the last couple of days obsessively listening to all the songs I love, because everything sounds so much better. It's amazing how much detail there is in songs that you're often unaware of, even if you're using a respectable pair of headphones already.
The custom-moulded headphones don't come cheap. The kit is £90, plus another £90 for the fitting session. But if you're an audiophile then that's cheap for what you're getting - almost perfect sound reproduction. Though, of course, you'll need to re-encode everything into Apple's lossless format to get the most out of it.
The hf2's will be available from April 28th.