ND65-4 2-1/2" Aluminum Cone Full-Range Driver 4 Ohm

Rubber-edged aluminum alloy cone

RRP $35.65
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Dayton Audio's compact ND65-4 aluminum cone driver demonstrates the latest advances in high-excursion design processes.

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.


Sealed Volume 0.05 ft.³
Sealed F3 102 Hz
Vented Volume 0.08 ft.³
Vented F3 53 Hz
* Enclosure volume/F3s based on BassBox "optimum" calculations


• Rubber-edged aluminum alloy cone
• Large excursion capability
• Self-shielded Neo-Balanced motor structure
• 4-layer underhung voice coil with polyimide former
• High power handling

Speaker Series ND Series
Model Number ND65-4
Color Black
Unit of Measure Each
UPC 844632081460
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 0.4000
Speaker Type Full-Range
Nominal Diameter 2.50"
Power Handling (RMS) 15 watts
Power Handling (max) 30 watts
Continuous Program Power --
Impedance 4 ohms
Sensitivity 83 dB @ 2.83V/1m
Frequency Response 85 - 20,000 Hz
Voice Coil Diameter 19 mm
Magnet Weight --
DC Resistance (Re) 3.5 ohms
Voice Coil Inductance (Le) 0.44 mH @1 kHz
Resonant Frequency (Fs) 89.5 Hz
Mechanical Q (Qms) 5.56
Electromagnetic Q (Qes) 0.68
Total Q (Qts) 0.61
Diaphragm Mass Inc. Airload (Mms) 2.5g
Moving Mass Of Diaphragm (Mmd) --
Mechanical Compliance of Suspension (Cms) 1.26 mm/N
Surface Area Of Cone (Sd) 15.6 cm²
Volume of Displacement (Vd) 5.4 cm³
BL Product (BL) 2.68 Tm
Compliance Equivalent Volume (Vas) 0.53 liters
Maximum Linear Excursion (Xmax) 3.5 mm
Driver's Mechanical Losses (Rms) --
Cone / Diaphragm Material Black Anodized Aluminum Cone
Entry / Exit Diameter --
Surround Material Rubber
Voice Coil Wire Material Copper
Voice Coil Former Kapton® / Polyimide
Basket/Frame Material Steel
Magnet Material Neodymium
Overall Outside Diameter 64 mm
Overall Depth 48 mm
Baffle Cutout Diameter 52 mm
# Mounting Holes 4
Mounting Hole Diameter --
Bolt Circle Diameter --
Product Weight --
SKU 844632081460
Model # ND65-4
Brand Dayton Audio
Shipping Weight 0.1816kg
Shipping Width 0.095m
Shipping Height 0.070m
Shipping Length 0.095m
Shipping Cubic 0.000634m3
Assembled Length 0.095m
Assembled Height 0.070m
Assembled Width 0.095m

Dayton Audio ND65-4 2-1/2" Full Range Driver

By: on 22 September 2016
After reading the information on the web site I had high hopes for this tiny little speaker driver. They were exceeded. The application is a Bluetooth enabled active speaker and the results are extraordinary. It really does perform better than many speakers twice its size.

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