ND25FW-4 1" Soft Dome Neodymium Tweeter with Waveguide 4 Ohm

Quick Overview

Dayton Audio has added a waveguide faceplate to the popular ND25 soft dome to create the ND25FW-4 tweeter. The waveguide faceplate controls dispersion and minimizes ceiling and wall reflections, which increases efficiency across most of the passband.

Product Highlights

  • Waveguide-loaded 1" treated silk dome
  • Waveguide provides controlled directivity and higher efficiency
  • High-strength neodymium motor with heatsink and ferrofluid cooling
  • Low Fs of 1,350 Hz can accommodate crossover points as low as 2,500 Hz
  • Standard 104 mm tweeter cutout for easy integration into many existing systems
  • Included foam gasket ensures a good seal to the enclosure

Product Manuals / Spec Sheets / Downloads

Dayton Audio ND25FW-4 Specification Sheet
Dayton Audio ND25FW-4 Data Files

Buying Options

The Dayton Audio ND25FW-4 tweeter features a unique integrated round waveguide faceplate that provides a controlled directivity transition at high frequencies, reducing the effect of room reflections on the speakers tonal balance. Unlike conventional flat-faceplate dome tweeters whose directivity does not match the midwoofer driver near the crossover frequency, the ND25FW-4s waveguide is curved to maintain consistent directivity at the transition. The waveguide also acts as a low-compression horn, lowering distortion. Waveguide-loaded dome tweeters are embraced within the industry for providing directivity control and mild horn loading without the negative effects of compression loading such as impulse smear and throat distortion where high levels are not needed. The waveguide profile used in the ND25FW-4 provides a minimum dispersion angle of about 90 degrees, and maintains directivity control to about 2,000 Hz, but the round waveguide will install easily into the same 104 mm standard tweeter cutout used commonly by dome tweeters with larger ferrite motors.

Speaker Series ND Series
Model Number ND25FW-4
Color Black
Unit of Measure Each
UPC 848791002014
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 0.35
Speaker Type Tweeter
Nominal Diameter 1"
Power Handling (RMS) 20 watts
Power Handling (max) 40 watts
Continuous Program Power --
Impedance 4 ohms
Sensitivity 91 dB @ 1W/1m
Frequency Response 2,500 - 20,000 Hz
Voice Coil Diameter 1"
Magnet Weight --
DC Resistance (Re) 3.2 ohms
Voice Coil Inductance (Le) 0.04 mH
Resonant Frequency (Fs) 1,350 Hz
Mechanical Q (Qms) --
Electromagnetic Q (Qes) --
Total Q (Qts) --
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) --
Entry / Exit Diameter --
Surround Material --
Voice Coil Wire Material --
Voice Coil Former --
Basket/Frame Material --
Magnet Material --
Overall Outside Diameter 4.12"
Overall Depth 1.7"
Baffle Cutout Diameter 3"
Mounting Hole Diameter --
Bolt Circle Diameter --
Product Weight --