CNET Reviews staff

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At its 2007 line show, Sony unveiled three new shelf systems, all featuring Bluetooth connectivity, which will enable the systems to play digital audio files from other Bluetooth devices, such as computers, MP3 players, and cell phones. The three shelf systems--the CMT-BX5BT, CMT-HX7BT and CMT-DH7BT--will cost between $150 and $300 and be available in April.

The CMT-HX7BT is the step-up model to the CMT-BX5BT and has many of the same features, including a CD player, MP3 playback, an AM/FM tuner with 30 presets, and a sleep timer. In addition to those features, the CMT-HX7BT is also XM-ready, which means you'll need only to connect an XM Mini-Tuner to get reception--and have a subscription, of course. The CMT-HX7BT also has an upgraded digital amplifier, which Sony claims can deliver 50 watts per channel.

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