Wharfedale 877, 539 Midrange Specifications, Tweeter Specifications, Crossover Specifications

Specifications 21/01/03 11:22 am Page 4

MIDRANGE SPECIFICATIONS

Part number	D.389
Dome material & size	75mm textile
Coil size & type	75mm aluminium
Magnet d1 x d2 x h	70 x 32 x 15
Magnet weight	248 gm
SPL 1w @ 1m	93dB
Fs	500Hz
Frequency range -3dB	400Hz – 5kHz
Distortion at 100dB @ 1m	typically <1%

TWEETER SPECIFICATIONS

FRONT TWEETER
Part number	D.390
Dome material & size	25mm textile
Coil size & type	25mm aluminium
Magnet d1 x d2 x h	50 x 37 x 30 alnico
Magnet weight	115 gm
SPL 1w @ 1m	92 dB
Fs	1kHz
Frequency range -3dB	800Hz – 40kHz
Upper frequency limit -10dB	45kHz
Distortion at 100dB @ 1m	typically <1%
TOP TWEETER
Part number	D.424
Dome material & size	25mm textile
Coil size & type	25mm aluminium
Magnet d x h	24 x 4 neodynium
Magnet weight	14 gm
SPL 1w @ 1m	92 dB
Fs	1kHz
Frequency range -3dB	800Hz – 40kHz
Upper frequency limit -10dB	45kHz
Distortion at 100dB @ 1m	typically <1%

CROSSOVER SPECIFICATIONS

Crossover sections	4 way
Type	Butterworth
Wiring	Monster cable XP
Connections	Mechanical Crimp
Crossover points at -6dB
Bass	180Hz at 12dB/oct
Bass/mid low	180Hz at 12dB/oct
Bass/mid high	700Hz at 12dB/oct
Midrange low	7000Hz at 12dB/oct
Midrange high	3.5kHz at 12dB/oct
attentuation	-2dB
Tweeter	3.5kHz at 12dB/oct
attentuation	-1.3dB
Super tweeter	9kHz at 12dB/oct