Renowned British audio manufacturer Bowers & Wilkins has announced an entire refresh of its 700 Series floorstanding, bookshelf, and center-channel speaker lineup. A three-year development cycle has resulted in much of the technology originally developed for the brand’s flagship 800 Series Diamond speakers trickling down to a line that costs a whole lot less; well, relatively so. The 700 Series features eight new models: three floorstanders, three bookshelf models with optional stands, and two center channels for home-theater deployments, including one with a tweeter-on-top diaphragm. B&W is a…