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Dayton Audio ND65-4 2-1/2″ Aluminum Cone Full-Range Neo Driver 4 Ohm

Dayton Audio’s compact ND65-4 aluminum cone driver demonstrates the latest advances in high-excursion design processes. An efficient, low-distortion Neo-Balanced motor is combined with a rigid yet lightweight aluminum diaphragm, yielding impressive high-impact audio reproduction. Perfect for single point-source speaker applications, or combined in multiples and line arrays.

Product Details

Brand Dayton Audio
Model ND65-4
Part Number 290-204
UPC 844632081460
Unit of Measure Each
Weight 0.4
Product Specifications

Nominal Diameter 2-1/2″
Moving Mass Of Diaphragm (Mmd) 2.5
Power Handling (RMS) 15 Watts
Power Handling (MAX) 30 Watts
Impedance 4Ω
Frequency Response 85 to 20,000Hz
Sensitivity 83dB 2.83V/1m
Voice Coil Diameter 0.75″
Thiele-Small Parameters

Resonant Frequency (Fs) 89.5Hz
DC Resistance (Re) 3.5Ω
Voice Coil Inductance (Le) 0.44mH
Mechanical Q (Qms) 5.56
Electromagnetic Q (Qes) 0.68
Total Q (Qts) 0.61
Compliance Equivalent Volume (Vas) 0.03ft³
Mechanical Compliance of Suspension (Cms) 1.26mm/N
BL Product (BL) 2.68T·m
Maximum Linear Excursion (Xmax) 3.5mm
Surface Area of Cone (Sd) 15.6cm²
Materials of Construction

Cone Material Aluminum
Surround Material Rubber
Voice Coil Wire Material Copper
Voice Coil Former Kapton® / Polyimide
Basket / Frame Material Steel
Magnet Material Neodymium
Mounting Information

Overall Outside Diameter 2.52″
Baffle Cutout Diameter 2.05″
Depth 1.89″
# Mounting Holes 4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)

Sealed Volume 0.05ft³
Sealed F3 102Hz
Vented Volume 0.08ft³
Vented F3 53Hz