This is the original SVS 25-31 PC cylinder subwoofer. This sub is tuned to 22 hrz. This unit contains the upgraded driver (a $129 value). Mechanically sound. Cosmetically very good, with the note of three one inch scratches on the rim of the top metal enclosure (nothing that some touch-up paint won't cover). Asking $500. I do not have the original box, but the price includes professional packing. I'll accept MO from national bank or US Postal check. I'll also would ship COD via UPS for additional cost. Ron Boster [email protected] PS: Long time member here and avs forum. Seller here and audiogon under "rboster."