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Dayton Audio ND140-8 5-1/4″ Aluminum Cone Midbass Neo Driver 8 Ohm

Dayton Audio’s ND140-8 midbass driver features an efficient, low-distortion Neo-Balanced motor that 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 Details

Brand Dayton Audio
Model ND140-8
Part Number 290-218
UPC 844632081491
Unit of Measure Each
Weight 0.95
Product Specifications

Nominal Diameter 5-1/4″
Moving Mass Of Diaphragm (Mmd) 10.4
Power Handling (RMS) 40 Watts
Power Handling (MAX) 80 Watts
Impedance 8Ω
Frequency Response 54 to 8,000Hz
Sensitivity 84.5dB 2.83V/1m
Voice Coil Diameter 1″
Thiele-Small Parameters

Resonant Frequency (Fs) 56.5Hz
DC Resistance (Re) 7.8Ω
Voice Coil Inductance (Le) 1.44mH
Mechanical Q (Qms) 5.01
Electromagnetic Q (Qes) 0.79
Total Q (Qts) 0.68
Compliance Equivalent Volume (Vas) 0.27ft³
Mechanical Compliance of Suspension (Cms) 0.76mm/N
BL Product (BL) 6.05T·m
Maximum Linear Excursion (Xmax) 4mm
Surface Area of Cone (Sd) 86.6cm²
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 5.43″
Baffle Cutout Diameter 4.72″
Depth 2.78″
# Mounting Holes 4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)

Sealed Volume 0.36ft³
Sealed F3 75Hz
Vented Volume 0.84ft³
Vented F3 37Hz