ND90-8 3-1/2" Aluminum Cone Full-Range Driver 8 Ohm

Direct replacement for Aura NS3

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Looking for a small driver that punches above its weight class? This radical high performance full-range transducer exudes an aura of superiority.

Dayton Audio's compact aluminum cone drivers demonstrate 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 applications, or combined in multiples and line arrays.


Sealed Volume 0.1 ft.³
Sealed F3 96 Hz
Vented Volume 0.15 ft.³
Vented F3 50 Hz
* Enclosure volume/F3s based on BassBox "optimum" calculations


• Direct replacement for Aura NS3
• Rubber-edged anodized aluminum alloy cone
• Large excursion capability 4 mm Xmax, 20 mm peak
• Self-shielded Neo-Balanced motor structure
• Full-range 80 Hz to 15 kHz performance
• 3/4" 4-layer underhung voice coil with polyimide former
• 20 watts RMS power handling

Speaker Series ND Series
Model Number ND90-8
Color Black
Unit of Measure Each
UPC 844632077449
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 0.5500
Speaker Type Full-Range
Nominal Diameter 3.50"
Power Handling (RMS) 20 watts
Power Handling (max) 40 watts
Continuous Program Power --
Impedance 8 ohms
Sensitivity 81.4 dB @ 2.83V/1m
Frequency Response 80 - 15,000 Hz
Voice Coil Diameter 19 mm
Magnet Weight --
DC Resistance (Re) 7.5 ohms
Voice Coil Inductance (Le) 1.08 mH @ 1 kHz
Resonant Frequency (Fs) 70.7 Hz
Mechanical Q (Qms) 4.71
Electromagnetic Q (Qes) 0.75
Total Q (Qts) 0.65
Diaphragm Mass Inc. Airload (Mms) 4.2g
Moving Mass Of Diaphragm (Mmd) --
Mechanical Compliance of Suspension (Cms) 1.22 mm/N
Surface Area Of Cone (Sd) 31.2 cm²
Volume of Displacement (Vd) 12.5 cm³
BL Product (BL) 4.3 Tm
Compliance Equivalent Volume (Vas) 1.77 liters
Maximum Linear Excursion (Xmax) 4.0 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 103.5 mm
Overall Depth 60.8 mm
Baffle Cutout Diameter 85 mm
# Mounting Holes 4
Mounting Hole Diameter --
Bolt Circle Diameter --
Product Weight --
SKU 844632077449
Model # ND90-8
Barcode # 844632077449
Brand Dayton Audio
Shipping Weight 0.2500kg
Shipping Width 0.032m
Shipping Height 0.019m
Shipping Length 0.038m
Shipping Cubic 0.000023000m3
Assembled Length 0.038m
Assembled Height 0.019m
Assembled Width 0.032m

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