B&C Speakers Woofer 18 PS 46 User Manual

Speakers HPL Coaxials HF Compression drivers Horns
Specifications
Nominal Diameter 460 mm (18 in)
Nominal Impedance 8 Ω
Minumum Impedance 6.2 Ω
Power Handling
(40 –400 Hz)
Nominal
1
700 W
Continuous Program
2
1400 W
Sensitivity (1W/1m)
3
96.5 dB
Frequency Range 30-2000 Hz
Voice Coil Diameter 100 mm (4 in)
Winding Material Copper
Former Material Glass Fibre
Winding Depth 21 mm (13/16 in)
Magnetic Gap Depth 8 mm (9/16 in)
Flux Density 1.1 T
Also available in 4 Ω, data upon request
Thiele & Small Parameters
4
Fs 28 Hz
Re 5.3 Ω
Qes 0.33
Qms 7.6
Qts 0.31
Vas 386 dm
3
(13.6 ft
3
)
Sd 1134 cm
2
(175.8 in
2
)
η
0
2.4%
X max ± 6 mm
X Var ± 5 mm
Mms 153 g
Bl 20.8 T·m
Le 2.4 mH
Mounting and Shipping Information
Overall Diameter 460 mm (18 in)
Bolt Circle Diameter 440 mm (17.3 in)
Baffle Cutout Diameter 422 mm (16.6 in)
Depth 191 mm (7.5 in)
Flange and Gasket Thickness 16 mm (5/8 in)
Net Weight 10.3 kg (22.7 lb)
Shipping Weight 12.1 kg (26.6 lb)
Shipping Box 520x520x240 mm
(20.5x20.5x9.4 in)
1
2 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.
18 PS 46 | Woofer
Long excursion 18" woofer with 1400W power handling for subwoofer
applications where reproduction of the lowest frequencies is mandatory.
A special 4" voice coil using proprietary high temperature adhesives and
an optimized magnet assembly guarantee robust LF output, low power
compression and a very low distortion figure. A bass-reflex enclosure is
recommended for best performance.

B&C Speakers Woofer 18 PS 46 Specifications

General

Type	Woofer
Nominal Diameter	18 inches
Nominal Impedance	8 Ohm
Sensitivity (1W/1m)	97 dB
Sensitivity	97 dB
Voice Coil Diameter	4 inches
Minimum Impedance	6.4 Ohm

Summary

Speaker Specifications

Nominal Diameter

Specifies the speaker's overall diameter.

Nominal Impedance

Indicates the speaker's electrical resistance.

Minimum Impedance

The lowest impedance the speaker presents.

Nominal Power Handling

Continuous power capacity within the specified frequency range.

Continuous Program Power Handling

Peak power capacity for short durations.

Sensitivity

Sound pressure level produced by 1W input at 1m distance.

Frequency Range

The operational frequency spectrum of the speaker.

Voice Coil Diameter

Diameter of the coil within the magnetic gap.

Winding Material

Material used for the voice coil windings.

Former Material

Material of the voice coil former.

Winding Depth

The height of the voice coil windings.

Magnetic Gap Depth

The depth of the space where the coil moves.

Flux Density

The magnetic field strength in the gap.

Thiele & Small Parameters

Fs (Resonant Frequency)

Resonant frequency of the speaker in free air.

Re (DC Resistance)

DC resistance of the voice coil.

Qes (Electrical Q Factor)

Electrical Q factor.

Qms (Mechanical Q Factor)

Mechanical Q factor.

Qts (Total Q Factor)

Total Q factor.

Vas (Equivalent Volume)

Equivalent volume of air with the same compliance as the suspension.

Sd (Cone Surface Area)

Surface area of the speaker cone.

η₀ (Reference Efficiency)

Reference efficiency.

X max (Maximum Linear Excursion)

Maximum linear excursion of the cone.

X Var (Variable Excursion Limit)

Variable excursion limit.

Mms (Moving Mass)

Effective mass of the cone and moving parts.

Bl (Force Factor)

Force factor.

Le (Voice Coil Inductance)

Voice coil inductance.

Mounting and Shipping Information

Overall Diameter

Specifies the speaker's overall diameter.

Bolt Circle Diameter

Diameter of the circle on which mounting bolts are placed.

Baffle Cutout Diameter

The diameter of the hole required for mounting in a baffle.

Depth

The total depth of the speaker.

Flange and Gasket Thickness

Thickness of the mounting flange and gasket.

Net Weight

The weight of the speaker itself.

Shipping Weight

The total weight including packaging.

Shipping Box Dimensions

The dimensions of the box used for shipping.