Dayton Audio ND90-4 3-1/2″ Aluminum Cone Full Range Neo Driver 4Ohm

Dayton Audio ND90-4 3-1/2″ Aluminum Cone Full Range Neo Driver 4Ohm Overview:Dayton Audio’s ND90-4 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:Full-range 80 Hz to 15 kHz performanceRubber-edged aluminum alloy coneLarge excursion capability—4 mm Xmax, 20 mm peakSelf-shielded Neo-Balanced motor structure3/4″ 4-layer underhung voice coil with polyimide former20 watts RMS power handling Product Details:BrandDayton AudioModelND90-4Unit of MeasureEachWeight0.55 Product Specification:Nominal Diameter3-1/2″Power Handling (RMS)20 WattsPower Handling (MAX)                            40 WattsSensitivity85.7dB 2.83V/1mVoice Coil Diameter0.75″Frequency Response                    80 to 15,000HzImpedance                              4Ω Thiele  Small Parameters:Resonant Frequency (Fs)90.2HzDC Resistance (Re)3.6ΩVoice Coil Inductance (Le)0.62mHMechanical Q (Qms)5.1Electromagnetic Q (Qes)0.72Total Q (Qts)0.63Compliance Equivalent Volume (Vas)0.037ft³Mechanical Compliance of Suspension (Cms)0.73mm/NBL Product (BL)3.47T·mDiaphragm Mass Inc. Airload (Mms)4.3gMaximum 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 Diameter4.07″ Baffle Cutout Diameter3.01″Depth2.39″# Mounting Holes4 Dayton Audio ND90-4 SpecificationsDayton Audio ND90-4 Klippel Test Results