← Back to Scan-Speak - 1.3" Ellipticor Dome Tweeter - D3404/552000
Where the figures for D3404/552000 come from
I take every figure from Scan-Speak's own product page or datasheet where I can. This lists where each figure on the D3404/552000 page came from.
- 8 from Scan-Speak's product page
- 24 from Scan-Speak's datasheet
- 2 worked out from Scan-Speak's figures
- 3 from NB Audio's listing
General
| Driver type | Tweeter | NB Audio's listing |
|---|---|---|
| Nominal size | 1.3" | NB Audio's listing |
| Nominal impedance | 4Ω | Maker's datasheet |
| Series | Ellipticor | NB Audio's listing |
| Power handling (RMS) | 180 W | Maker's datasheet |
| Power handling (program) | 300 W | Maker's datasheet |
| Sensitivity | 97 dB | Maker's product page |
| Frequency range | 2,500 – 20,000 Hz | Maker's datasheet |
| Recommended crossover | 2. order HP Butterworth, 2.5 kHz | Maker's datasheet |
Thiele/Small parameters
| Resonant frequency (Fs) | 475 Hz | Maker's product page |
|---|---|---|
| DC resistance (Re) | 3 Ω | Maker's product page |
| Minimum impedance (Zmin) | 4 Ω | Maker's datasheet |
| Voice coil inductance (Le) | 0.01 mH | Maker's datasheet |
| Mechanical Q (Qms) | 5.25 | Maker's datasheet |
| Electrical Q (Qes) | 0.63 | Maker's datasheet |
| Total Q (Qts) | 0.57 | Maker's product page |
| Equivalent volume (Vas) | 0.04 L | Maker's product page |
| Compliance (Cms) | 0.2 mm/N | Maker's datasheet |
| Moving mass (Mms) | 0.57 g | Maker's datasheet |
| Mechanical resistance (Rms) | 0.32 kg/s | Maker's datasheet |
| Force factor (Bl) | 2.8 T·m | Maker's product page |
| Effective piston area (Sd) | 11.4 cm² | Maker's product page |
| Linear excursion (Xmax, one-way) | 0.25 mm | Maker's datasheet |
| Mechanical excursion (Xmech) | 2 mm | Maker's datasheet |
| Displacement volume (Vd) | 0.285 cm³ | Worked out from the maker's figures |
| Efficiency bandwidth product (EBP) | 754 | Worked out from the maker's figures |
| Effective piston diameter (D) | ~38 mm | Maker's datasheet |
| Impedance at resonance (Zo) | 30 Ω | Maker's datasheet |
Motor
| Voice coil size | 28 / 39 mm | Maker's datasheet |
|---|---|---|
| Voice coil height | 2.5 mm | Maker's datasheet |
| Air gap height | 3 mm | Maker's datasheet |
| Voice coil layers | 2 | Maker's datasheet |
Mounting
| Overall diameter | 120 mm | Maker's datasheet |
|---|---|---|
| Mounting depth | 35.5 mm | Maker's datasheet |
| Volume displaced by driver | 0.13 L | Maker's datasheet |
| Weight | 0.75 kg | Maker's datasheet |
Materials
| Magnet | Neodymium | Maker's product page |
|---|
Not on file: Cutout, Bolt circle, Flange thickness. Either the maker doesn't publish it or I haven't found it yet.
What the labels mean
- Maker's product page: copied from the maker's product page.
- Maker's datasheet: read off the maker's own datasheet or drawing.
- Worked out from the maker's figures: Vd = Sd × Xmax, EBP = Fs ÷ Qes.
- NB Audio's listing: how I've filed it in the store.
Check them yourself: Datasheet