21 S 4 PL

Subwoofer
Code: Z008424

Nominal overall diameter: 21″
Nominal voice coil diameter: 4″
Magnet material: Neodymium
Basket material: Aluminium Die-Cast
Power: 2400 W
Sensitivity: 98.8 dB
Frequency range: 35-500 Hz

Description

  • Rated Power measured with 2 hours test with pink noise signal, 6dB crest factor, loudspeaker in free air, power calculated on rated Zmin
  • Power on Continuous Program is defined as 3 dB greater than the Rated Power
  • Sensitivity calculated by Thiele and Small parameters, for SPL average in box refer to frequency response
  • Thiele and Small parameters measured with laser system after preconditioning test
  • Xmax measured with respect to a THD of 10%
  • Xvar value corresponding to a decay of the Force Factor, or Compliance, or both, equal to the 50% of the small signal value.
  • Due to continuing product improvement, the features and the design are subject to change without notice.

 

Additional information

General Specifications
Nominal Diameter

545 mm / 21 in

Nominal Impedance

8 Ω

Rated Power AES

1200 W

Continuos Program Power

2400 W

Sensitivity @ 1W/1m

98.8 dB

Voice Coil Diameter

100 mm (4")

Voice Coil Winding Depth

23 mm

Magnetic Gap Depth

17 mm

Flux Density

0.89 T

Magnet Weight

536 g

Net Weight

10.5 Kg

Constructive Characteristics
Magnet Type

Neodymium

Basket Material

Aluminium Die-Cast

Voice Coil Winding Material

Copper

Voice Coil Former Material

Fiberglass

Cone Material

Paper

Cone Treatment

Humidity Resistant Pulp

Surround Material

Treated Cloth

Dust Dome Material

Solid Paper

Mounting Information
Overall Diameter

545 mm

Baffle Cutout Diameter

497 mm

Mounting Holes

8 holes 13×9 on Ø520 mm

Total Depth

249 mm

Thiele/Small Parameters
Re

5.7 Ω

Qms

9.95

Qts

0.30

Cms

65 µm/N

Vas

255.0 l

X max

+/- 5.2 mm

N

3.29 %

Fs

34.6 Hz

Qes

0.31

Mms

325 g

Bxl

36.10 Tm

Sd

1661.9 cm²

X var

+/- 10.7 mm

Le (1KHz)

1.60 mH