BZ 300 4 OHM

30 cm (12") subwoofer featuring a coated cone and a solidly constructed metal basket. To provide long cone strokes and high power handling, the driver is equipped with an extended rear pole-plate. Due to the 50 mm voice coil the BZ 300 is suited for high power operation. Suitable for free-air-operation as well as driver for band-pass and vented enclosures.
No longer available.

sketch

frequency- and impedance response

Technical Data:
Rated power	350 Watt
Maximum power	450 Watt
Nominal impedance Z	4 Ohm
Frequency response	fu - 4000 Hz
(fu: Lower cut-off frequency depending on cabinet)	.
Mean sound pressure level	92 dB (1W/1m)
Maximum cone displacement	20 mm
Resonance frequency fs	36 Hz
Height of front pole-plate	8 mm
Voice coil diameter	5 cm
Height of winding	1,4 cm
Cutout diameter	28 cm
Net weight	4,5 kg
D.C. resistance Rdc	3,6 Ohm
Mechanical Q factor Qms	5,46
Electrical Q factor Qes	0,53
Total Q factor Qts	0,4
Equivalent volume Vas	129 l
Effective piston area Sd	510 cm²
Dynamically moved mass Mms	53,3 g
Force factor Bxl	9,26 T · m
Inductance of the voice coil L	0,93 mH

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