Class-leading headphone maker Sennheiser has released two cool-looking open-back headphones – the £30 HD 415 and £40 HD 435. The latter comes with an in-line volume control, a detachable single-sided cable and a protective pouch, but beyond that’s there’s not much between them. Bundled with both is a 3.5 mm gold-plated jack plug for portable use and a gold-plated 1/4″ screw-on jack adapter for home. The single-sided cable ensures tangle free wearing. Sennheiser cans have trademark drivers for a smooth bass response and treble, but don’t wear these babies and expect them to block out all sounds. Such super-comfy lightweights are intended for use in quiet environments.