The hottest accessories for your MP3

Seven new devices to enhance your digital player - all made by small companies

Portable Sound Laboratories' iMainGo, $50
Portable Sound Laboratories' iMainGo, $50
iMainGo's battery-powered portable speaker case has received positive reviews from the magazine MacWorld and rapper Mos Def. Tim Jacobus, 47, and Jorge Ragde, 44, both private wealth managers, invested in the Chatsworth, Calif. start-up when they were impressed with the full-bodied sound from the nine-ounce speakers. The year-old company, which is selling its gear in Virgin Megastores, will introduce an upgraded version of the system with 25% more audio output and titanium speakers in January.

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Most stock quote data provided by BATS. Market indices are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer. Morningstar: © 2018 Morningstar, Inc. All Rights Reserved. Factset: FactSet Research Systems Inc. 2018. All rights reserved. Chicago Mercantile Association: Certain market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. Dow Jones: The Dow Jones branded indices are proprietary to and are calculated, distributed and marketed by DJI Opco, a subsidiary of S&P Dow Jones Indices LLC and have been licensed for use to S&P Opco, LLC and CNN. Standard & Poor's and S&P are registered trademarks of Standard & Poor's Financial Services LLC and Dow Jones is a registered trademark of Dow Jones Trademark Holdings LLC. All content of the Dow Jones branded indices © S&P Dow Jones Indices LLC 2018 and/or its affiliates.