W308B
W310B
W312B
Size
20 cm (8")
25 cm (10")
30 cm (12")
Impedance
4 ohm
4 ohm
4 ohm
Nom. power (RMS)
100 W (max 150)
120 W (max 200)
150 W (max 250)
Freq. range
30 Hz - 2 kHz
25 Hz - 2 kHz
20 Hz - 2 kHz
Sensitivity
87,1 db
89 dB
91 dB
Voice coil diameter
50 mm (2”)
50 mm (2”)
50 mm (2”)
Voice coil height
22 mm (0,87”)
22 mm (0,87”)
22 mm (0,87”)
Re
3,1 ohm
3,4 ohm
3,3 ohm
Voice coil inductance, 1 kHz
1,5 mH
1,1 mH
1,1 mH
BL product
7,8
11,5
12,22
X-max
+-5 mm (0,2”)
+-5 mm (0,2”)
+-5 mm (0,2”)
Suspension compliance CMS
478
349
317
SD- Effective piston area
214 cm
2
314,6 cm
2
452,3 cm
2
Resonant freq. (Fs)
36,3 Hz
36 Hz
30 Hz
Vas (liters)
30,5
48,6
115
Vas (ft
3
)
1,08
1,72
4,06
Qms
3,55
2,49
3,26
Qes
0,45
0,32
0,36
Qts
0,40
0,28
0,34
Cone material
Coated non-compress paper
Coated non-compress paper
Coated n-cp paper
Magnet weight
40 oz (1,13 kg)
40 oz (1,13 kg)
50 oz (1,42 kg)
Magnet diameter
4,7" (120 mm)
5,7" (145 mm)
6,14" (156 mm)
Installation depth
3,94" (100 mm)
4,4" (112 mm)
5,04" (128 mm)
Mounting hole
7,08" (180 mm)
8,86" (225 mm)
10,8" (274 mm)
Outer diameter
8,27" (210 mm)
10,08" (256 mm)
12,12" (308 mm)
Weigth
6,6 lb (3 kg)
8,38 lb (3,8 kg)
9,92 lb (4,5 kg)
TECHNICAL SPECIFICATIONS FOR DLS CLASSIC SUBWOOFERS
RECOMMENDED ENCLOSURES FOR W308B, W310B & W312B
W308B
Vb1
Vb2
port Vb2
8,02
4,93
1x6,8x33 cm
0,28 ft
3
0,17 ft
3
1x3"x13" (US)
F3 Vb1: 50 Hz, Vb2: 141,9 Hz
VENTED ENCLOSURE
Subwoofer Volume (liters/ft3)
Port
Damping
F3
Fb
W308B
vol: 18 / 0,64
3” x 30 cm/ 11,8”
Line inside
45,9 Hz
45 Hz
W310B
vol: 28,5 / 1,0
3” x 14 cm/5,5”
Line inside
48,4 Hz
45,0 Hz
W312B
vol: 41,6 / 1,47
4” x 32 cm/12,6”
Line inside
47,1 Hz
40,2 Hz
SEALED ENCLOSURE
We don´t recommend the use of
sealed enclosures for these
subwoofers
The speaker is installed in Vb1
playing into chamber Vb2 where
the port(s) are installed.
F3
= approximative lower frequency for
vented boxes in Hz. Often called F-3 dB point
= the point where the power is 50% lower.
Fb
= Box resonant frequency
SEALED BANDPASS
W310B
Vb1
Vb2
port Vb2
22,17
13,98
1x10,2x35,5 cm
0,78 ft
3
0,49 ft
3
1x4"x14" (US)
F3 Vb1: 40 Hz, Vb2: 118 Hz
W312B
Vb1
Vb2
port Vb2
32,84
37,23
2x10,2x19 cm
1,16 ft
3
1,32 ft
3
2 x 4" x 7,5" (US)
F3 Vb1: 45 Hz, Vb2: 99 Hz
Vb1=rear, Vb2=front
RUNNING-IN PERIOD
Allow the speaker to play for at least
15-20 hours. After this time the
performance is correct.
