Optimus Prime's Stereo Equipment Old School Audio - Old School Prices - Professionally Tested Product Description This Yamaha YST-SW011 is an active powered subwoofer in good used condition, featuring a front-firing driver with a distinctive silver dome and a black base platform. The unit powers on and produces bass as designed, with the volume control and power switch on the rear panel both functioning correctly. Cosmetically the cabinet shows light scuffs and marks consistent with normal use, visible in the photos. Please review all photos for details. Highlights At A Glance ✔ Fully tested and verified ✔ Good used condition with light scuffs and wear from normal use ✔ Fast, insured shipping, carefully packaged Testing & Verification This subwoofer was bench tested with a signal applied to the rear-panel input jack and confirmed to produce clean bass output with no distortion, rattles, or buzzing from the driver or cabinet. The rear-panel volume control was swept through its full range and operates smoothly. The power switch was cycled and the unit powers on and off correctly. Shipping Fast, insured shipping from Minnesota. Item is carefully packaged for safe delivery.