As an Amazon Associate, we earn from qualifying purchases. Home » AuraSound » NS18-992-4A Aurasound NS18-992-4A 18" Pro Subwoofer Driver 4 Ohm AuraSound . NS18-992-4A Gallery Attributes Brand name, Manufacturer name, Manufacturer, BrandAuraSound DimensionUnitinch Extra Product NameAurasound NS18-992-4A 18" Pro Subwoofer Driver 4 Ohm UPC848864022659 Weight51 WeightUnitlbs depth, length12.25 diameter, height, width18.75 height_Attrib, width_AttribOverall Outside Diameter length_AttribDepth moq, multiple1 MPN, ModelNS18-992-4A qtyInStock0 SKU, Part Number296-260 snippetAurasound NS18-992-4A 18" Pro Subwoofer Driver 4 Ohm. Part Number: 296-260 by AuraSound. Unit of MeasureEach Nominal Diameter18" Bolt Circle Diameter17.5 Power Handling (RMS)800 Watts Power Handling (MAX)1600 Watts Impedance4? Frequency Response20 to 1,500 HzHz Sensitivity89dB 2.83V/1m Voice Coil Diameter3.9" Resonant Frequency (Fs)20Hz DC Resistance (Re)3.1? Mechanical Q (Qms)7.7 Electromagnetic Q (Qes)0.5 Total Q (Qts)0.47 Compliance Equivalent Volume (Vas)11.37ft? Mechanical Compliance of Suspension (Cms)0.17mm/N BL Product (BL)17.65T?m Maximum Linear Excursion (Xmax)25mm Surface Area of Cone (Sd)1164cm? Cone Material, Voice Coil Wire MaterialAluminum Surround MaterialRubber Voice Coil FormerFiberglass Basket / Frame MaterialCast Aluminum Magnet MaterialNeodymium Overall Outside Diameter18.75" Baffle Cutout Diameter16.8" Depth12.25" # Mounting Holes8 Sealed Volume4.3ft? Sealed F335Hz Vented Volume8ft? Vented F323Hz Distributor offers SellerSKUMOQIn stockMultiplePrices parts-express.com296-26011