The curved cabinets usually only found on much more expensive speakers help eliminate vibrations & dissipate standing waves. This ensures no loss of performance superior bass & a more focused image. The 9.CS speakers can also be bi-wired separating the signal paths to the high & low frequencies & so offering a cleaner more precise sound. With a strong tight bass & huge amounts of top-end detail the Wharfedale Diamond 9.CS centre speaker will give you hours of listening pleasure.