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

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.

Product Specifications
Nominal Diameter
3-1/2″

Power Handling (RMS)
20 Watts
 
Power Handling (max)
40 Watts

Impedance
4 ohms
 
Frequency Response
80 to 15,000 Hz

Sensitivity
85.7 dB 2.83V/1m
 
Voice Coil Diameter
0.75″
Thiele-Small Parameters
Resonant Frequency (Fs)
90.2 Hz

DC Resistance (Re)
3.6 ohms
 
Voice Coil Inductance (Le)
0.62 mH

Mechanical Q (Qms)
5.10
 
Electromagnetic Q (Qes)
0.72

Total Q (Qts)
0.63
 
Compliance Equivalent Volume (Vas)
0.037 ft.³

Mechanical Compliance of Suspension (Cms)
0.73 mm/N
 
BL Product (BL)
3.47 Tm

Diaphragm Mass Inc. Airload (Mms)
4.3g
 
Maximum Linear Excursion (Xmax)
4 mm

Surface Area of Cone (Sd)
31.2 cm²
 
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
4.07″

Baffle Cutout Diameter
3.35″
 
Depth
2.39″

# Mounting Holes
4