Monacor SPH-300KE
SPH-300KE is the largest model of the Monacor Kevlar Series woofers. It has strong vented magnet system and cone made of real woven Kevlar.
This is the manufacturer's brochure
My Measurements
| Driver Properties | Thiele - Small Parameters | ||||
|---|---|---|---|---|---|
| Chassis material | Die Cast Aluminum Alloy | Parameter | Measured | Datasheet | |
| Membrane material | Kevlar | Fs | 22.8Hz | 22 Hz | |
| Magnet System | Ferrite | Re | 5.9 Ω | 6.2 Ω | |
| Surround | Rubber | Qms | 4.2 | 4.15 | |
| Voice Coil Diameter | 65.5 mm | Qes | 0.35 | 0.36 | |
| Nominal Impedance | 8 Ω | Qts | 0.32 | 0.33 | |
| Sensitivity | 90 dB/W/m | Vas | 182 ltr | 250 ltr | |
| Rated Power | 120W | Le | 0.79 mH | 1.5 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 impedance curve - free and in 38 ltr sealed box
Conclusion
This driver really has an excellent performance up to 2KHz (in this case a notch at 3300Hz is mandatory) and T/S parameters suitable for bassreflex cabinets.
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