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NHP25F-4 1" Soft Dome High Power Neodymium Tweeter 4 Ohm

Quick Overview

The Dayton Audio compact NHP25F-4 1" soft dome tweeter uses a high temperature neodymium motor, Ferrofluid cooling, and rear mounted heatsink for improved heat dissipation making this tweeter suitable for higher output systems and even professional line arrays. In addition, the flat response and high efficiency makes the NHP25F-4 an amazing value.

Product Highlights

  • Attached heatsink and ferrofluid cooling for increased power handling
  • Over 95 dB efficient is perfect for use in higher output designs
  • Compact cast aluminum faceplate minimizes center to center distance
  • High temperature neodymium motor allows high output for extended periods
  • Extremely smooth response makes for easy transition to midrange diver

Product Manuals / Spec Sheets / Downloads

Dayton Audio NHP25F-4 Specification Sheet
Dayton Audio NHP25F-4 Data Files

Dayton Audios versatile NHP25F-4 is a 1" titanium-dome tweeter that offers the performance of more expensive tweeters in a compact and stylish package. The small yet powerful high temperature neodymium motor with attached aluminum heatsink and Ferrofluid-filled magnetic gap reduces power compression and improves long-term power handling. In addition, the carefully designed titanium diaphragm provides accurate treble response up to 20 kHz, excellent off-axis dispersion, and superb sonic detail.

The NHP25F-4 includes a 2.5" cast aluminum faceplate, however Dayton Audio does offer an optional 4.09" (104 mm) and 4.33" (110 mm) faceplate allowing this tweeter to be used as a drop in replace for many common sized tweeters.

104mm Cast Aluminum Face Plate for NHP Tweeters

110mm Cast Aluminum Face Plate for NHP Tweeters

Speaker Series ND Series
Model Number NHP25F-4
List Price $39.99
Color Black
Unit of Measure Each
UPC 848791004759
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 0.25
Speaker Type Tweeter
Nominal Diameter 1"
Power Handling (RMS) 40 watts
Power Handling (max) 80 watts
Continuous Program Power --
Impedance 4 ohms
Sensitivity 95 dB 2.83V/1m
Frequency Response


000 - 20

Voice Coil Diameter 25.4 mm
Magnet Weight --
DC Resistance (Re) 3.18 ohms
Voice Coil Inductance (Le) 0.03 mH
Resonant Frequency (Fs) 1689 Hz
Mechanical Q (Qms) 3.75
Electromagnetic Q (Qes) 2.04
Total Q (Qts) 1.32
Diaphragm Mass Inc. Airload (Mms) --
Moving Mass Of Diaphragm (Mmd) --
Mechanical Compliance of Suspension (Cms) --
Surface Area Of Cone (Sd) --
Volume of Displacement (Vd) --
BL Product (BL) --
Compliance Equivalent Volume (Vas) --
Maximum Linear Excursion (Xmax) --
Drivers Mechanical Losses (Rms) --
Cone / Diaphragm Material Silk
Entry / Exit Diameter --
Surround Material --
Voice Coil Wire Material Copper
Voice Coil Former Aluminum
Basket/Frame Material Aluminum
Magnet Material Neodymium
Overall Outside Diameter 63.75 mm
Overall Depth 27.2 mm
Baffle Cutout Diameter 40.1 mm
Mounting Hole Diameter --
Bolt Circle Diameter --
Product Weight --