As the latest portable speaker system-slash-case from Portable Sound Laboratories, iMainGo XP ($119) is the company's first iPad-specific product, and is substantially different from its prior iPod- and iPhone-compatible speaker cases. iMainGo XP now packs four speaker drivers rather than two, and uses a fully hard plastic chassis with hinges that flip the speakers open to the left and right of the iPad's screen when viewed in landscape mode. A rechargeable battery pack provides six or more hours of audio playtime -- down somewhat from past iMainGo models -- while the case is designed to be held on an angle when used with an included Amzer plastic stand. iMainGo XP is designed to hold the original iPad inside its soft-lined body, but comes with a fully hard plastic frame that clips onto the iPad 2. A power supply is included in the package, along with an additional headphone port plug; iMainGo XP connects to the top of either iPad rather than the bottom, leaving the Dock Connector port open.