← Back to Dayton Audio - 1⅛" Reference Aluminium Dome Tweeter - RST28A-4
Where the figures for RST28A-4 come from
I take every figure from Dayton Audio's own product page or datasheet where I can. This lists where each figure on the RST28A-4 page came from.
- 13 from Dayton Audio's product page
- 6 from Dayton Audio's datasheet
- 1 worked out from Dayton Audio's figures
- 1 not yet checked
- 3 from NB Audio's listing
General
| Driver type | Tweeter | NB Audio's listing |
|---|---|---|
| Nominal size | 1.125" | NB Audio's listing |
| Nominal impedance | 4Ω | Maker's product page |
| Series | Reference | NB Audio's listing |
| Power handling (RMS) | 80 W | Maker's product page |
| Sensitivity | 92.5 dB | Maker's product page |
| Frequency range | 1,500 – 20,000 Hz | Maker's product page |
Thiele/Small parameters
| Resonant frequency (Fs) | 775 Hz | Maker's product page |
|---|---|---|
| DC resistance (Re) | 3 Ω | Maker's product page |
| Voice coil inductance (Le) | 0.03 mH | Maker's product page |
| Mechanical Q (Qms) | 2.15 | Maker's product page |
| Electrical Q (Qes) | 1.65 | Maker's product page |
| Total Q (Qts) | 0.93 | Maker's product page |
| Effective piston area (Sd) | 6.6 cm² | Maker's product page |
| Efficiency bandwidth product (EBP) | 469.7 | Worked out from the maker's figures |
Mounting
| Overall diameter | 104.5 mm | Maker's datasheet |
|---|---|---|
| Cutout diameter | 73 mm | My earlier listing, not yet checked |
| Mounting depth | 42 mm | Maker's datasheet |
| Flange thickness | 4 mm | Maker's datasheet |
| Bolt circle diameter | 90 mm | Maker's datasheet |
| Mounting holes | 4 | Maker's datasheet |
| Mounting hole diameter | 4.5 mm | Maker's datasheet |
| Weight | 0.8165 kg | Maker's product page |
Materials
| Cone | Black Anodised Aluminium | Maker's product page |
|---|
Not on file: Vas, Xmax, Bl, Mms. 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.
- My earlier listing, not yet checked: from the listing I had before I started checking figures against makers. Treat it as a guide until it's checked.
- NB Audio's listing: how I've filed it in the store.
Check them yourself: Dayton Audio RST28A-4 Specification Sheet