B&C 21SW152-4 21 Inch Speaker Rebuild Kit 4 Ohm

This item is brand-new, factory sealed.

4000 w continuous program power capacity
153 mm (6 in) split winding copper voice coil
30 - 1000 hz response
96 db sensitivity
60 mm peak-to-peak excursion before damage
neodymium magnet allows a very high force factor and linear excursion
double silicone spider with optimized compliance
ventilated voice coil gap for reduced power compression
aluminium demodulating ring for very low distortion

nominal diameter

4 ohm
nominal impedance

4.2 ohm
minimum impedance

4000 w
continuous power handling

2000 w
nominal power handling (aes)

96 db
sensitivity (1w/1m)

30 - 1000 hz
frequency range

153 mm (6 in)
voice coil diameter

copper
winding material

glass fibre
former material

neodymium ring
magnet material

30 mm (1.18 in)
winding depth

12 mm (0.5 in)
magnetic gap depth

1.2 t
flux density

design
triple roll
surround shape

radial
cone shape

neodymium ring
magnet type

double silicone
spider

t-pole
pole design

190 dm3 (6.71 ft3)
recommended enclosure volume

33 hz
recommended tuning frequency

parameters
32 hz
fs

3.4 ohm
re

0.31
qes

7
qms

0.3
qts

200 dm3 (7.00 ft3)
vas

1680 cm2 (260.40 in2)
sd

2.2 %
0

15 mm
xmax

16 mm
xvar

460 g
mms

32.5 txm
bl

1.5 mh
le

103 hz
ebp

mounting and shipping info
547 mm (21.5 in)
overall diameter

527 mm (20.7 in)
bolt circle diameter

508 mm (20 in)
baffle cutout diameter

261 mm (10.3 in)
depth

0.63 mm (16 in)
flange and gasket thickness

16 dm3 (0.56 ft3)
air volume occupied by driver

18.5 kg (40.7 lb)
net weight

20.9 kg (46 lb)
shipping weight

590x590x300 mm (23.2x23.2x11.8 in)
shipping box

service kit..Rck21sw152 [single]