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Dayton Audio ND25FN-4 1″ Silk Dome Neodymium Tweeter Element 4 Ohm

Dayton Audio’s ND25FN-4 is a versatile 1″ tweeter element for use in highly customized applications requiring smooth, clean treble output. The treated silk dome diaphragm delivers excellent detail and smoothness, while the high-strength neodymium magnet enables high output from an extremely compact size. The rear-mounted heatsink and ferrofluid-filled magnetic gap provide improved heat dissipation from the compact motor structure, for reduced power compression at high levels. A copper pole cap further reduces distortion and inductance effects.

This element is identical to the round-faceplate ND25FA-4 model, but with no faceplate installed. It’s perfect for installation into a waveguide or a custom mounting plate, or in limited clearance applications such as automotive A-pillars. Simply bond the unit in place from behind, and prepare to be surprised at the clean, detailed output!

Product Specifications
Tweeter Type
Soft Dome

Cone / Dome Diameter
1″
 
Impedance
4 ohms

Power Handling (RMS)
20 Watts
 
Frequency Response
2,500 to 20,000 Hz

Sensitivity
90 dB 2.83V/1m
 
Thiele-Small Parameters
Resonant Frequency (Fs)
1,350 Hz

DC Resistance (Re)
3.20 ohms
 
Voice Coil Inductance (Le)
0.04 mH

Mechanical Q (Qms)
3.87
 
Electromagnetic Q (Qes)
2.61

Total Q (Qts)
1.56
 
Mounting Information
Overall Outside Diameter
1.61″

Cutout Diameter
1.34″
 
Depth
0.83″