Two speaker series
Our evaluation system came with two pairs of B&W's bookshelf speakers ($150 each) for the front and surround channels; a matching for the center channel ($220); and a 10-inch powered subwoofer ($450), which the company threw in even though it's technically not considered part of the 300 Series.
The DM303s and the LCR3 are very conventional-looking, especially compared to the company's Nautilus line, but it's worth noting that you can choose between maple and ash vinyl veneers. Each satellite has a 6-inch fiberglass woofer and a 1-inch metal-dome tweeter. Meanwhile, the LCR3 center channel uses two 4.5-inch woofers and the same 1-inch tweeter. To enhance the clarity of high-frequency sounds, the tweeters are mounted inside tapered tubes in a manner similar to that of Nautilus tweeters.
You're best off mounting these speakers on stands or shelves, because their rear-facing bass ports require a few inches of breathing room to work properly. Those bass ports are dimpled like the surface of a golf ball. According to B&W, this helps the air move without undue turbulence.
As far as connectivity goes, the speakers use standard-issue five-way binding posts that accept bare wire, spades, and banana plugs. However, there are no threaded sockets for wall mounting.
With the whole six-piece system hooked up, we noticed what seemed like a weakness in the 300 Series' ability to smoothly integrate high and midrange sounds with the lower frequencies. We took the ASW500 sub out of the system by changing the settings on our Pioneer Elite VSX-24TX receiver and ran all of the low-frequency sound to the other speakers. Surprisingly, the problem disappeared, resulting in as good of an audio experience as we've heard from speakers in this price range.