OEM SYSTEMS COMPANY MODEL 500 500-Watt Subwoofer Amplifier<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Model 500: Subwoofer Amplifier，Frequency Response: 20-300Hz</li><li>Four independent controls offer flexibility to integrate nearly all subwoofers with the main speakers and the listening environment.</li><li>The MODEL 500 incorporates a unique subsonic filter adjustable from 20 – 35Hz that limits/extends power output to the lowest frequency the subwoofer driver is capable of reproducing.</li><li>The MODEL 500 incorporates stereo Line-Level inputs and outputs that permit the amplifier to be connected between a preamplifier and amplifier without the need for Y-connectors</li><li>A double-insulated， isolated-ground electrical supply prevents electrical ground loops and reduces the noise floor of the entire audio system.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/310Un3os5sL.jpg" noproxy>