Dayton Audio DS215-PR 8″ Designer Series Passive Radiator

Dayton Audio DS215-PR 8″ Designer Series Passive Radiator Overview:The Dayton Audio Passive Radiators are excellent general-purpose passives suitable for replacement or for new construction. The Dayton Audio Passive Radiators are excellent general-purpose passives suitable for replacement or for new construction. A built-in mass disc offers a good starting point for most designs, and a convenient M5 threaded hole (screw included) allows different types of weights to be added if desired. Cosmetically and mechanically, the passives match the Shielded DVC line of subwoofers, with a poly coated paper cone and medium-roll rubber surround for clean excursion and long life. The possibilities with these passives are endless, from floor standing two-ways to small active/passive subwoofer systems. Key Features:Long-throw suspension system for clean excursionDurable coated paper cone and rubber surroundM5 threaded hole simplifies adding mass for lower tuning frequencyCosmetically and mechanically matches the Designer Series line of drivers Product Details:BrandDayton AudioModelDS215-PRUnit of MeasureEachWeight1 Product Specification:Nominal Diameter8″  Thiele-Small Parameter:Resonant Frequency (Fs)23.3HzMechanical Q (Qms)7.34Compliance Equivalent Volume (Vas)1.52ft³Mechanical Compliance of Suspension (Cms)0.68mm/NDiaphragm Mass Inc. Airload (Mms)11mmSurface Area of Cone (Sd)211.2cm² Materials of Construction:Cone MaterialPaperSurround MaterialRubberBasket / Frame MaterialSteel Mounting Information:Overall Outside Diameter8.5″Baffle Cutout Diameter7.125″Depth2.28″# Mounting Holes5