The latest pair of active-style, Bluetooth earphones to hit the market is Sony's DR-BT160 Wireless Stereo Headset, which comes in two models: the $130 BT160AS, which includes just the headphones, and the $180 BT160IK, which also throws in an iPod adapter. It's a pricey solution, but those who can get a good fit will be rewarded with good wireless sound quality.
About fit: the Sony DR-BT160 headphones are not adjustable, so it is going to be an issue for some users. This reviewer, with her abnormally small ears, certainly had a problem getting the headset to feel secure and comfortable. Other testers had better results, though.
The Bluetooth power and control modules are somewhat triangular in shape and rest behind each ear. The bottom of the left module houses a power-input port, while a call answer button resides on the bottom of the right module.
The right module also houses the controls: a pairing button, a power key, and a joystick that adjusts volume and skips tracks. The joystick may also be pressed in to play or pause tracks; this particular control is a bit awkward, but other than that, we found the toggle handy and responsive.
On the sound quality front, the Sony DR-BT160 headphones fair very well. Music sounds good, with nice mids and good clarity, with a reasonable amount of high-end detail. Bass response is not thumping, but there is a present low end. Call quality is only so-so.