Dayton Audio's ND25FN-4 compact soft dome tweeter element features high
output and smooth, low-distortion sound. The high-strength neodymium motor
features an aluminum heat sink for cool operation and reduced power
compression.
Highlights
1" treated silk dome diaphragm
Faceplate-free design enables versatile custom mounting
High-strength neodymium motor with heatsink and ferrofluid cooling
Extremely smooth and extended treble response beyond 22 kHz
Perfect for use with a waveguide or custom mounting plate
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"