University Diffusicone Eight
The University Diffusicone series introduces a new approach of integrating the whizzer, which is connected to the speaker cone by perforated surround. To achieve better performance in the high frequency range, this driver has aluminum dust cap, connected directly to the voice coil, which is made of aluminum alloy too.
This is the manufacturer's brochure
This is the specifications, given in "The Master" magazine
My Measurements
| Driver Properties | Thiele - Small Parameters | ||||
|---|---|---|---|---|---|
| Chassis material | Stamped steel | Parameter | Measured | Datasheet | |
| Membrane material | Paper | Fs | 94Hz | N/A | |
| Magnet System | AlNiCo | Re | 7.4 Ω | N/A | |
| Surround | Impregnated Paper | Qms | 2.67 | N/A | |
| Voice Coil Diameter | 38 mm | Qes | 0.87 | N/A | |
| Nominal Impedance | 8 Ω | Qts | 0.66 | N/A | |
| Sensitivity | 95 dB/W/m | Vas | 24 ltr | N/A | |
| Rated Power | 25W | Le | 0.25 mH | N/A | |
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 input RMS.
Burst decay response, measured at 1m on axis
The impedance curve in 18 ltr sealed box
Conclusion
Unlike the similar drivers with a metal dustcap, the University Diffucone Eight behaves calm in the midrange bandwidth. It gives very good results in a open baffle construction.
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