B&C Speakers manual 21SW150 Subwoofer, Specification, Thiele & Small Parameters

Models: 21SW150

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21SW150 Subwoofer

3000 W continuous program power capacity

150 mm (6 in) copper voice coil

30 – 1000 Hz response

95 dB sensitivity Ventilated voice coil and aluminium demodulating ring 60 mm peak-to-peak excursion before damage Double silicone spider with optimized compliance

LF Drivers LF Nd Drivers Coaxials HF Drivers Horns

Specification

Nominal Diameter

530 (21) mm (in)

Nominal Impedance (1)

4 Ohm

Minimum Impedence

4 Ohm

Nominal Power Handling (2)

1500 W

Continuous Power Handling (3)

3000 W

Sensitivity (1W/1m) (4)

95 dB

Frequency Range

30 - 1000 Hz

Voice Coil Diameter

150 (6) mm (in)

Winding Material

Copper

Former Material

Glass Fibre

Winding Depth

30 (1.18) mm (in)

Magnetic Gap Depth

12 (1/2) mm (in)

Flux Density

1.2 T

Thiele & Small Parameters

Fs

29 Hz

Re

3.3 Ohm

Qes

0.27

Qms

8.1

Qts

0.26

Vas

254 (8.9) dm3 (ft3)

Sd

1680 (260.4) cm2 (in2)

Eta Zero

2 %

Xmax

+/- 15 mm

Xvar

+/- 16 mm

Mms

494 g

Bl

32.6 Txm

Le

1.3 mH

 

Mounting and Shipping Info

 

 

Overall Diameter

547 mm (21.5 in)

Bolt Circle Diameter

527 mm (20.7 in)

Baffle Cutout Diameter

508 mm (20 in)

Depth

250 mm (8.2 in)

Flange and Gasket Thickness

15.5 mm (5/8 in)

Net Weight

18 kg (40 lb)

Shipping Weight

20.4 kg (44.9 lb)

Shipping Box

590x590x300 mm

 

(23.2x23.2x11.8 in)

1For different impedances, please ask.

22 hours test made with continuous pink noise signal (6 dB crest factor). Power calculated on rated minimum impedance.

3Power on Continuous Program is defined as 3 dB greater than the Nominal rating.

4Applied RMS Voltage is set to 2.83V for 8 ohms or 2.0V for 4 ohms Nominal Impedance

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B&C Speakers manual 21SW150 Subwoofer, Specification, Thiele & Small Parameters, Mounting and Shipping Info

21SW150 specifications

B&C Speakers has established itself as a leader in the audio industry, renowned for its commitment to quality and innovative design. Among its superior line of products is the 21SW150, a powerful subwoofer driver that excels in both professional and home audio applications.

The 21SW150 is a 21-inch subwoofer designed for high output and deep bass performance. Its robust construction ensures durability, making it suitable for both mobile and fixed installations in concert venues, cinemas, and large events. Weighing approximately 60 kg (around 132 lbs), this driver is built to withstand the rigors of demanding audio environments.

One of the standout features of the 21SW150 is its impressive power handling capabilities. With a continuous power rating of 4,000 watts and a peak power handling of 8,000 watts, this driver can deliver exceptional sound pressure levels. This makes it an ideal choice for live sound applications where powerful bass response is essential.

The driver incorporates a state-of-the-art 4-inch voice coil, which enhances its thermal and mechanical performance. This design minimizes distortion, allowing for clean and precise reproduction of low frequencies. The voice coil’s high-temperature capability ensures that audio engineers can push the limits without fear of failure, even in high-stress situations.

Another distinguishing feature is the custom-designed, pressed paper cone. This cone not only contributes to the driver’s lightweight construction but also ensures optimal pistonic motion, reducing unwanted resonance and coloration. The cone’s design allows for smooth and continuous bass response, making it an excellent choice for genres that rely on deep, impactful low-end frequencies.

The 21SW150 also boasts a sophisticated double suspension system which improves linearity and provides better control over the driver’s movement. This technology ensures that the driver performs accurately across a wide range of frequencies, maintaining clarity and depth even at high volumes.

In addition, the driver utilizes a powerful neodymium magnet structure that enhances its magnetic efficiency. This not only contributes to a lightweight design but also allows for increased sensitivity, enhancing the overall output without requiring excessive power input.

In summary, the B&C Speakers 21SW150 is a powerhouse in the realm of subwoofer drivers. With its robust construction, high power handling, advanced technologies, and exceptional acoustic performance, it stands as a top choice for audiophiles and sound engineers alike, ensuring impactful low-end sound for any audio application.