Sennheiser has expanded its line of full-sized, portable HD headphones, including the HD 428, HD 438 and HD 448.

The top-of-the-range HD 448 model offers precise detail. The HD 438 also offers a natural sound signature, while the HD 428 is more focused on the lower frequencies and delivers powerful bass response.

Each model features a closed-back, around-the-ear design that provides good sound isolation, and each comes with a gold-plated quarter-inch stereo adapter.

Ergonomic designs and soft padding allow the HD models to fit comfortably even after many hours of wear.

The single-sided cable ensures freedom of movement and uncomplicated handling. The HD 448 comes with a 5.2-foot extension cable, and the HD 438 includes 4.6-foot and 10-foot detachable cables.

HD 428 - MSRP: $99.95
HD 438 - MSRP: $119.95
HD 448 - MSRP: $129.95

Sennheiser USA Website