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DAYTON AUDIO ND90-4 Speaker Driver Full Range 20W 4 Ohm 86dB 80Hz - 15kHz Ø8.9cm
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Dayton Audio ND90-4
Speaker Driver Full Range 20W 4Ω 86dB 80Hz - 15000Hz Ø8.9cm
The compact Dayton Audio ND90-4 wide-range driver features an anodised aluminium cone and a rubber suspension for high linear excursion. Its low-distortion Neodymium magnet and suspended voice coil motor, combined with this excellent diaphragm, allows for a rich, dynamic reproduction with deep bass. Thus, the loudspeaker can be used either alone or in combination with other loudspeakers.
Technical characteristics
| Specifications | |
|---|---|
| Product type | Full range speaker driver |
| Nominal diameter | Ø8.9cm (3.5") |
| Power | RMS : 20W Max : 40W |
| Impedance | 4Ω |
| Frequency response | 80Hz - 15000Hz |
| Sensitivity | 85.7dB @ 2.83V/1m |
| Voice coil diameter | Ø19mm |
| Weight | 249g |
| Thiele-Small Parameters | |
|---|---|
| Resonant frequency (Fs) | 90.2Hz |
| DC Resistance (Re) | 3.6Ω |
| Voice coil inductance (Le) | 0.62mH @ 1kHz |
| Mechanical quality coefficient (Qms) | 5.10 |
| Electromagnetic quality coefficient (Qes) | 0.72 |
| Total quality coefficient (Qts) | 0.63 |
| Compliance equivalent volume (Vas) | 1.06L (0.037 ft.³) |
| Mechanical compliance of suspension (Cms) | 0.73mm/N |
| Force factor (BL) | 3.47Tm |
| Diaphragm mass inc. airload (Mms) | 4.3g |
| Maximum linear excursion (Xmax) | 4mm |
| Surface area of cone (Sd) | 31.2cm² |
| Volume of displacement (Vd) | 12.5cm³ |
| Materials | |
|---|---|
| cone | Anodized Aluminium |
| Surround | Rubber |
| Voice coil wire | Copper |
| Voice coil former | Kapton / Polyimide |
| Frame/Basket | Steel |
| Magnet | Neodymium |
| Shielding | |
| Mounting informations | |
|---|---|
| Total external diameter | Ø103.4mm (4.07") |
| Cutout diameter | Ø85.1mm (3.35") |
| Depth | 60.7mm (2.39") |
| Number of mounting holes | 4 |
| Optimum cabinet size (Measured with BassBox 6 Pro) | |
|---|---|
| Sealed volume | 0.1ft³ |
| Sealed F3 | 90Hz |
| Vented volume | 0.16ft³ |
| Vented F3 | 48Hz |
| Speaker Power (W RMS) | 20.0 |
| Speaker Type | Full range |
| Impedance (Ω) | 4 |
| Loudspeaker diameter (mm) | 89.0 |
| Diaphragm type | Aluminium |
| Efficiency / Sensitivity (dB) | 86.0 |
| Max Linear Excursion (Xmax) (mm) | 4.0 |
| Lowest frequency (Hz) | 80 |
| Highest frequency (Hz) | 15000 |
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