ND25FA-4 1" Soft Dome Neodymium Tweeter 4 Ohm

Quick Overview

Compact, ultra-smooth soft dome tweeter with excellent detail and high power handling. The small faceplate and tiny neodymium motor make it easy to keep center-to-center distance to a minimum for improved off-axis response, and the exceptionally flat response above 3kHz makes crossover design an absolute breeze!

Product Highlights

  • Exceptionally flat treble response with low distortion
  • Compact round faceplate design is simple to install
  • High-strength neodymium motor with heatsink and ferrofluid cooling
  • 1" diameter voice coil for good off-axis dispersion
  • Clean, modern styling and appearance

Product Manuals / Spec Sheets / Downloads

Dayton Audio ND25FA-4 Specification Sheet
Dayton Audio ND25FA-4 Data Files

Buying Options

This tweeter is smooth! The Dayton Audio ND25FA-4 is a 1” soft-dome tweeter that combines an exceptionally flat response above 3 kHz with a compact round faceplate for a clean, modern appearance that integrates easily into any design. The tiny yet powerful neodymium motor structure features an aluminum heatsink and ferrofluid cooling for low power compression and improved long-term power handling. A copper pole cap within the motor further reduces distortion and inductance effects.

Choose the ND25FA-4 when you need detail that that doesn’t become fatiguing or shrill at high volumes, for a highly refined presentation. The compact faceplate allows for close center-to-center spacing of drivers, making these tweeters perfect for line array use or D’Appolito (MTM) configurations with wide dispersion.

Speaker Series ND Series
Model Number ND25FA-4
Color Black
Unit of Measure Each
UPC 848791000850
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 0.2
Speaker Type Tweeter
Power Handling (RMS) 20 watts
Power Handling (max) 40 watts
Continuous Program Power --
Impedance 4 ohms
Sensitivity 90 dB @ 2.83V/1m
Frequency Response 2,500 - 20,000 Hz
Voice Coil Diameter 25 mm
Magnet Weight --
DC Resistance (Re) 3.2 ohms
Voice Coil Inductance (Le) 0.03 mH
Resonant Frequency (Fs) 1,350 Hz
Mechanical Q (Qms) 3.87
Electromagnetic Q (Qes) 2.61
Total Q (Qts) 1.56
Diaphragm Mass Inc. Airload (Mms) --
Moving Mass Of Diaphragm (Mmd) --
Mechanical Compliance of Suspension (Cms) --
Surface Area Of Cone (Sd) 7.5 cm²
Volume of Displacement (Vd) --
BL Product (BL) --
Compliance Equivalent Volume (Vas) --
Maximum Linear Excursion (Xmax) --
Drivers Mechanical Losses (Rms) --
Cone / Diaphragm Material Soft Dome
Entry / Exit Diameter --
Surround Material --
Voice Coil Wire Material Copper
Voice Coil Former Kapton®
Basket/Frame Material --
Magnet Material Neodymium
Overall Outside Diameter 66 mm
Overall Depth 35.9 mm
Baffle Cutout Diameter 45 mm
# Mounting Holes 4
Mounting Hole Diameter --
Bolt Circle Diameter --
Product Weight --
Cone / Dome Diameter 1"