ND140-8 5-1/4" Aluminum Cone Midbass Driver 8 Ohm

Quick Overview

Dayton Audios ND140-8s compact aluminum cone demonstrates the latest advances in high-excursion design processes. Its compact size and high output make it perfect for your next point-source or line array speaker project.

Product Highlights

  • Extended-range 54 Hz to 8 kHz performance
  • Rubber-edged aluminum alloy cone
  • Large excursion capability 4 mm Xmax, 20 mm peak
  • Self-shielded Neo-Balanced motor structure
  • 1" 4-layer underhung voice coil with polyimide former
  • 40 watts RMS power handling

Product Manuals / Spec Sheets / Downloads

Dayton Audio ND140-8 Specification Sheet
Dayton Audio ND140-8 Data Files

Buying Options

Dayton Audios ND140-8s 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 0.36 ft.³
Sealed F3 75 Hz
Vented Volume 0.84 ft.³
Vented F3 37 Hz
* Enclosure volume/F3s based on BassBox "optimum" calculations

Speaker Series ND Series
Model Number ND140-8
Color Black
Unit of Measure Each
UPC 844632081491
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 0.95
Speaker Type Midrange
Nominal Diameter 5.25"
Power Handling (RMS) 40 watts
Power Handling (max) 80 watts
Continuous Program Power --
Impedance 8 ohms
Sensitivity 84.5 dB @ 2.83V/1m
Frequency Response 54 - 8,000 Hz
Voice Coil Diameter 25 mm
Magnet Weight --
DC Resistance (Re) 7.8 ohms
Voice Coil Inductance (Le) 1.44 mH @ 1 kHz
Resonant Frequency (Fs) 56.5 Hz
Mechanical Q (Qms) 5.01
Electromagnetic Q (Qes) 0.79
Total Q (Qts) 0.68
Diaphragm Mass Inc. Airload (Mms) 10.4g
Moving Mass Of Diaphragm (Mmd) --
Mechanical Compliance of Suspension (Cms) 0.76 mm/N
Surface Area Of Cone (Sd) 86.6 cm²
Volume of Displacement (Vd) 34.6 cm³
BL Product (BL) 6.05 Tm
Compliance Equivalent Volume (Vas) 7.74 liters
Maximum Linear Excursion (Xmax) 4.0 mm
Drivers 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 138 mm
Overall Depth 70.5 mm
Baffle Cutout Diameter 120 mm
# Mounting Holes 4
Mounting Hole Diameter --
Bolt Circle Diameter --
Product Weight --