Dayton Audio
Dayton Audio - 1" Tweeter Silk - ND25FN-4
Dayton Audio - 1" Tweeter Silk - ND25FN-4
In stock
Stock status is updated regularly from my distributor. If the full quantity ordered isn’t available, I’ll get in touch.
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Description
Compact soft dome tweeter element with high output and smooth, low-distortion sound. The high-strength neodymium motor features an aluminium heat sink for cool operation and reduced power compression.
Dayton Audio’s ND25FN-4 is a versatile 1” tweeter element for use in highly customised 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!
Features
- 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 22kHz
- Perfect for use with a waveguide or custom mounting plate
Specifications
Specifications
General
| Driver type | Tweeter |
|---|---|
| Nominal size | 1" |
| Nominal impedance | 4Ω |
| Series | ND |
| Power handling (RMS) | 20 W |
| Power handling (program) | 40 W |
| Sensitivity | 90 dB |
| Frequency range | 2,500 – 20,000 Hz |
Thiele/Small parameters
| Resonant frequency (Fs) | 1,350 Hz |
|---|---|
| DC resistance (Re) | 3.2 Ω |
| Voice coil inductance (Le) | 0.04 mH |
| Mechanical Q (Qms) | 3.87 |
| Electrical Q (Qes) | 2.61 |
| Total Q (Qts) | 1.56 |
| Effective piston area (Sd) | 7.5 cm² |
| Efficiency bandwidth product (EBP) | 517.2 |
Motor
| Voice coil wire | Copper |
|---|
Mounting
| Overall diameter | 41 mm |
|---|---|
| Cutout diameter | 34 mm |
| Mounting depth | 21 mm |
| Voice coil diameter | 25 mm |
| Weight | 0.05897 kg |
| Mounting holes | 4 |
Materials
| Cone | Treated Silk Dome |
|---|---|
| Surround | Treated Silk |
| Voice coil former | Kapton® |
| Magnet | Neodymium |
- Sensitivity measured at 2.83V/1m.
Downloads
- ND25FN-4 Specification Sheet
- ND25FN-4 Data Files
- ND25FN-4 3D File
- ND25FN-4 Cutout & Recess Template (NB Audio) Every figure is straight off Dayton Audio's own spec sheet. Left out: no recess (flange outline not on file); no bolt holes (positions not on file). Check it against your driver before you cut.
Where do these figures come from? See the source of each one
