Scan-Speak 18W/8542-00
Scan-Speak 18W/8542-00 is the last model from the Classic series in current production, used the famous Nylonfiber Paper Cone. It is well known to the audiophiles as the midwoofer driver of the legendary ProAc Studio 100 loudspeakers.
This is the manufacturer's brochure
My Measurements
| Driver Properties | Thiele - Small Parameters | ||||
|---|---|---|---|---|---|
| Chassis material | Die Cast Magnesium Alloy | Parameter | Measured | Datasheet | |
| Membrane material | Air Dried Paper/Nylon Fibre | Fs | 30Hz | 36 Hz | |
| Magnet System | Ferrite | Re | 6.6 Ω | 6.6 Ω | |
| Surround | Coated Foam | Qms | 1.7 | 1.7 | |
| Voice Coil Diameter | 42 mm | Qes | 0.26 | 0.32 | |
| Nominal Impedance | 8 Ω | Qts | 0.32 | 0.27 | |
| Sensitivity | 89 dB/W/m | Vas | 47.9 ltr | 39 ltr | |
| Rated Power | 70W | Le | 0.2 mH | 0.2 mH | |
Frequency response at 1m with 2.83 V input RED - on axis, BLUE - 15 º off axis, GREEN - 30 º off axis
The second, third and fourth harmonic curves measured at 2.83V and 8V input RMS.
Burst decay response, measured at 1m on axis
The Cumulative Spectral Decay
Conclusion
An excellent driver with smooth frequency response usable up to 2,5 KHz, suitable for small bookshelf-sized boxes or three-way systems as a midrange.
To The Top