Kef Cresta 10 Bookshelf Speakers - Black Ash - The Cresta 10, a compact stand-mount or bookshelf speaker matches the 25mm tweeter with a 130mm (51/2”) mid/bass driver, housed in a reflex ported 8.5 litre cabinet to give amazingly low frequency reproduction. Design: 2 way bookshelf Drive units: HF: 25 and more Home HiFi Systems