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B&W ZZ08613

Bowers Wilkins BW ZZ08613 6.5 inch mid-woofer Bowers Wilkins BW ZZ08613 6.5 inch mid-woofer

B&W ZZ08613 is a bass driver used in B&W Matrix 804 and CDM7 systems.    

My Measurements

Driver Properties Thiele - Small Parameters
Chassis material Die Cast Aluminum Alloy    Parameter Measured Datasheet
Membrane material Polypropylene Fs 33 Hz N/A
Magnet System Ferrite Re 5.0 Ω N/A
Surround Rubber  Qms 4.69 N/A
Voice Coil Diameter 38 mm Qes 0.34 N/A
Nominal Impedance 8 Ω Qts 0.32 N/A
Sensitivity 90 dB/W/m   Vas 32 ltr N/A
Rated Power N/A Le 0.42 mH N/A

                                       
Bowers Wilkins BW ZZ08613 SPL Responce 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


Bowers Wilkins BW ZZ08613 Second, Third and Fourth Harmonic in 38 ltr sealed box

The second, third and fourth harmonic curves measured at 2.83V and 8V input RMS.



Bowers Wilkins BW ZZ08613 Burst decay Responce at 1m in 38 ltr sealed box

Burst decay response, measured at 1m on axis


Bowers Wilkins BW ZZ08613 impedance in 38 ltr seled box

The impedance curve in 18 ltr sealed box


Conclusion

Although this driver is used by Bowers & Wilkins designers as a woofer only, it can cover a part of the midrange too up to 2.5 Khz. The Thiele-Small parameters are very good for compact bass-reflex or BVR enclosure.

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