Store return. Product functions like new and will show minimal, if any, signs of wear. What's included: - Subwoofer - Mounting tape Comes in non-retail packaging. Manuals and documentation can be found on the Manufacturer's support site. Features: MRC Honeycomb Subwoofer Diaphragm Our acclaimed Mica Reinforced Cellular (MRC) diaphragm material is further enhanced via a honeycomb fiber structure, for unmatched rigidity and responsiveness. Enhancements over the years of MRC material development have produced a driver 10x more rigid than conventional PP Matrix cones, for natural low-distortion sound and a wide frequency response. Separated Notch Edge Surround The woofer surround features another proprietary Sony technology, with distinctive curved notches improving the vertical amplitude symmetry, for dramatically reduced distortion and enhanced clarity. Progressive Height Rate Spider The acoustically optimized spider allows for higher power handling and airflow, with a profile designed for more rapid and precise cushioning of the speaker cone. To increase signal integrity and prevent sound interference, the lead wire from the voice coil is also sewn to the spider, reducing wire movement. Gold-Plated Input Terminals Gold-plated spring terminals allow up to AWG#10 speaker cables. Five-Beam Frame Structure Dynamic Air Diffuser The Five-beam Frame design disperses resonance while the integrated Dynamic Air Diffuser ensures efficient air circulation for smooth cone travel and cooling of the voice coil.