While I think that the most important thing about headphones is how they reproduce sounds, I have to say that to start off with, these Klipsch M40s look good on the surface too. The design isn’t too chunky, and the overall headphones have a nice style about them.
The Klipsch M40s are the first active noise-canceling headphones from the brand, designed to drown out distracting background sounds like jet engines and subway rattle. They feature dynamic dual 40mm woofers and 15mm tweeter drivers in order to provide solid sound. They are powered by a single AAA battery, and each is supposed to last for about 45 hours. One cool thing is that they don’t need batteries to provide sound. Some noise-canceling headphones, like the Dr. Dre Beats Studio, have no sound when the battery runs out. These continue running, and only the noise-canceling is deactivated.
The ear pads use a low repulsion foam (like in Tempur-Pedic pillows), making them good to keep on for long periods of time. One of the cables comes with a remote control and a built-in microphone. For those of you buying on specs, frequency response is rated from 20Hz to 20kHz, sensitivity is 97.5dB@1mW, at an impedance of 32Ω.
The new Klipsch M40 active noise-canceling headphones sell for $349.99(USD) at various online retailer and on the Klipsch website.