B&C Speakers 15PK40 specifications 15 PK 40 Woofer, Specifications, Thiele & Small Parameters4

15 PK 40 Woofer

High efficiency 15" woofer with a very flat frequency response up to 2 kHz and high power handling (800W). Good LF performance, smooth voice response, and compatibility with compact bass-reflex enclosures, the 15 PK 40 achieves perfect balance in two-way systems.

Speakers HPL Coaxials HF Compression drivers Horns

Specifications

Nominal Diameter	380 mm (15 in)
Nominal Impedance	8 Ω
Minumum Impedance	6.2 Ω
Power Handling
(50 –500 Hz)
Nominall	400 W
Continuous Program2	800 W
Sensitivity (1W/1m)3	99 dB
Frequency Range	50-2000 Hz
Voice Coil Diameter	76 mm (3 in)
Winding Material	Copper
Former Material	Glass Fibre
Winding Depth	16 mm (5/8 in)
Magnetic Gap Depth	9 mm (11/32 in)
Flux Density	1.1 T
Also available in 4 Ω, data upon request

Thiele & Small Parameters4

Fs	47 Hz
Re	5.1 Ω
Qes	0.33
Qms	5.1
Qts	0.31
Vas	140 dm3 (4.9 ft3)
Sd	855 cm2 (132.5 in2)
η0	4.2%
X max	± 4 mm
X var	± 6 mm
Mms	84 g
Bl	19.7 T·m
Le	2.3 mH

Mounting and Shipping Information

Overall Diameter	394 mm (15.5 in)
Bolt Circle Diameter	374 mm (14.6 in)
Baffle Cutout Diameter	355 mm (13.9 in)
Depth	162 mm (6.4 in)
Flange and Gasket Thickness	16 mm (5/8 in)
Net Weight	8.3 kg (18.3 lb)
Shipping Weight	9.6 kg (21.1 lb)
Shipping Box	450x450x200 mm
	(17.7x17.7x8 in)

12 hours test made with continuous pink noise signal (6 dB crest factor) within the specified range. Power calculated on rated minimum impedance. Loudspeaker in free air.

2 Power on Continuous Program is defined as 3 dB greater than the Nominal rating. 3 Applied RMS Voltage is set to 2.83V for 8 ohms Nominal Impedance. Average SPL from 200 to 2000Hz.

4 Thiele-Small parameters are measured after a high level 20 Hz sine wave precon- ditioning test.