Celestion CF1840JD 4 OHM Twin Demodulation Rings Subwoofer Speaker Ships Free! Balanced airflow venting provides enhanced cooling Twin demodulation rings Optimised double suspension Specifications: Nominal Diameter: 457mm/18in Power Rating: 1200W Continuous Power Rating: 2400W Rated Impedance: 4? Sensitivity: 97dB Frequency Range: 30Hz-2500Hz Magnet Type: Ferrite Voice Coil Diameter: 100mm Chassis Type: Cast aluminium Magnet Weight3.18mm/112oz Voice Coil Material: Round copper Former Material: Glass fibre Cone Material: Kevlar loaded paper Surround Material: Cloth-sealed Additional Impedances: 4 Suspension: Double Xmax: 10mm/0.39in Gap Depth: 10mm/0.39in Voice Coil Winding Width: 30mm/1.18in ---------------------------------------------------------------------------------------------------------------- Echotone Music LLC is an experienced E-commerce Audio Visual Equipment dealer since 1998. We take pride in selling Pro Audio gear for musicians, sound engineers, production companies and broadcast applications. Shipping --Items are well packed and shipped USPS, UPS or Freight Service. Items purchased on Friday may not ship until Monday or until the projected processing period. We are working hard to get your unit Built ( if needed), processed and shipped. Processing Times do vary Returns/Refunds- If there is truly a manufacturing defect a return tag will be provided, otherwise customer pays for return shipping costs. Returned items must be sealed/unopened in original, brand-new condition, showing no signs of wear or use such as mount marks, plug marks, scratches, scuffs, dings or scrapes, screw mount marks or collateral material damage.. Items must also include all original packaging, manuals, warrantees accessories or your return may be subject to a return handling charge. Refunds are for the Item cost only. If the item was listed as free shipping then the cost of the shipment will be deducted from the units original cost. Gear returned with out all its original packaging, warranty cards and accessories or that shows signs of wear from use, will be subject to an additional service/restocking fee. This item is now used and it would be unfair to resell to another customer as new. The following products cannot be returned - Clearance items, Custom Builds, items identified as non-returnable, discontinued items, used or NOS items, electronic software downloads, demo gear, strings, computers, vacuum tubes, earbuds, earplugs, recorders, harmonicas, raw-frame speakers, drumheads, drumsticks, turntable cartridges, fog fluids, clothing/footwear, cleaners, polishes polishing cloths, software/sound ware, books, CDs, DVD's, vinyl records, and videos.