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

Quick Overview

Dayton Audios compact aluminum cone drivers demonstrate the latest advances in high-excursion design processes.

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 ND140-4 Specifications Sheet
Dayton Audio ND140-4 Data Files

Dayton Audios 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.

OPTIMUM CABINET SIZE *

Sealed Volume 0.78 ft.³
Sealed F3 65 Hz
Vented Volume 1 ft.³
Vented F3 34 Hz
* Enclosure volume/F3s based on BassBox "optimum" calculations

Speaker Series ND Series
Model Number ND140-4
List Price $39.99
Color Black
Unit of Measure Each
UPC 844632081484
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 1
Speaker Type Midrange
Nominal Diameter 5.25"
Power Handling (RMS) 40 watts
Power Handling (max) 80 watts
Continuous Program Power --
Impedance 4 ohms
Sensitivity 88.4 dB @ 2.83V/1m
Frequency Response

54 - 8

000 Hz

Voice Coil Diameter 1"
Magnet Weight --
DC Resistance (Re) 3.7 ohms
Voice Coil Inductance (Le) 0.79 mH @ 1 kHz
Resonant Frequency (Fs) 59.2 Hz
Mechanical Q (Qms) 5.35
Electromagnetic Q (Qes) 0.72
Total Q (Qts) 0.63
Diaphragm Mass Inc. Airload (Mms) 10.1g
Moving Mass Of Diaphragm (Mmd) --
Mechanical Compliance of Suspension (Cms) 0.71 mm/N
Surface Area Of Cone (Sd) 86.6 cm²
Volume of Displacement (Vd) 34.6 cm³
BL Product (BL) 3.9 Tm
Compliance Equivalent Volume (Vas) 7.22 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 --
Voice Coil Former Kapton Polyimide
Basket/Frame Material --
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 --
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