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University Diffusicone Eight

Pair of University Diffusicone Eight8 inch Fullrange Drivers

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  Link To Fostex FP-203 Manufacturer's Datasheet

This is the specifications, given in "The Master" magazine  Link To University Diffusicone Eight Manufacturer's Datasheet

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

SPL Responce of University Diffusicone Eight at 1m on axis and 15 30 deg off axis

Frequency response at 1m with 2.83 V input RED - on axis, BLUE - 15 º off axis, GREEN - 30 º off axis

Second, Third and Fourth Harmonic ofUniversity Diffusicone Eight in 18 ltr sealed box

The second, third and fourth harmonic curves measured at 2.83V input RMS.

Burst decay Responce of University Diffusicone Eightat 1m in the Universal Horn

Burst decay response, measured at 1m on axis

The impedance ofUniversity Diffusicone Eight in 18 ltr seled box

The impedance curve in 18 ltr sealed box


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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