Polk Ultra-Marine Source Unit

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The waterproof Polk Ultra-Marine source unit (UM1) offers superior sound quality and a variety of connection capabilities, says distributor ASA Electronics. With a maximum power of 200 watts, it is Bluetooth-enabled (up to 100 feet) and SiriusXM-ready. The unit features a dual USB port, two auxiliary audio inputs, an AM/FM radio, a weatherband tuner and a microphone feature when used with the UMZC4 zone control module. $599. ASA Electronics, Elkhart, Indiana, (574) 266-3193. www.asaelectronics.com

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October 2014 issue