Dayton Audio ND90-8 3-1/2″ Aluminum Cone Full-Range Neo Driver 8Ohm

Dayton Audio ND90-8 3-1/2″ Aluminum Cone Full-Range Neo Driver 8Ohm Overview:Dayton Audio’s ND90-8 compact aluminum cone driver demonstrates the latest advances in high-excursion design processes. When teamed up with the matching ND series passive radiators this driver can produce incredible full sound from compact enclosures. Key Features:Direct replacement for Aura NS3Rubber-edged anodized aluminum alloy coneLarge excursion capability—4 mm Xmax, 20 mm peakSelf-shielded Neo-Balanced motor structureFull-range 80 Hz to 15 kHz performance3/4″ 4-layer underhung voice coil with polyimide former20 watts RMS power handling Product Details:BrandDayton AudioModelND90-8Unit of MeasureEachWeight0.55 Product Specification:Nominal Diameter3-1/2″Power Handling (RMS)20 WattsPower Handling (MAX)40 WattsSensitivity81.4dB 2.83V/1mVoice Coil Diameter0.75″Frequency Response80 to 15,000Hz Impedance8Ω Thiele  Small Parameters:Resonant Frequency (Fs)70.7HzDC Resistance (Re)7.5ΩVoice Coil Inductance (Le)1.08mHMechanical Q (Qms)4.71Electromagnetic Q (Qes)0.75Total Q (Qts)0.65Compliance Equivalent Volume (Vas)0.062ft³Mechanical Compliance of Suspension (Cms)1.22mm/NBL Product (BL)4.3T·mDiaphragm Mass Inc. Airload (Mms)4.2gMaximum Linear Excursion (Xmax)4mmSurface Area of Cone (Sd)31.2cm² Materials of Construction:Cone MaterialAluminumSurround MaterialRubberVoice Coil Wire MaterialCopperVoice Coil FormerKapton® / PolyimideBasket / Frame MaterialSteelMagnet MaterialNeodymium Mounting Information:Overall Outside Diameter                      4.07″Baffle Cutout Diameter                      3.01″Depth                      2.39″# Mounting Holes                        4 Dayton Audio ND90-8 SpecificationsDayton Audio ND90-8 Klippel Test Results