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All the new Sony Extra Bass speakers just announced - CNET
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Sony GTK-XB90 Portable Bluetooth Speaker -- Battery, Party Chain, NFC 27242904392 | eBay
Sony GTK XB7 Home Audio System - YouTube
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Amazon.com: Sony GTK-PG10 Portable Bluetooth Speaker: Wireless Indoor / Outdoor Bluetooth Speakers - Compact Party Stereo System with Cup Holders - Travel Speaker with FM Radio Tuner, Microphone Jack, USB Port : Electronics
