Specifications

W108B W308B W310B W312B
Size 20 cm (8") 20 cm (8") 25 cm (10") 30 cm (12")
Impedance 4 ohm 4 ohm 4 ohm 4 ohm
Nom. power (RMS) 100 W (max 150) 100 W (max 150) 120 W (max 200) 150 W (max 250)
Freq. range 30 Hz - 2 kHz 30 Hz - 2 kHz 25 Hz - 2 kHz 20 Hz - 2 kHz
Sensitivity 87 dB 87 db 89 dB 91 dB
Voice coil diameter 50 mm (2”) 50 mm (2”) 50 mm (2”) 50 mm (2”)
Voice coil height 22 mm (0,87”) 22 mm (0,87”) 22 mm (0,87”) 22 mm (0,87”)
Re 3,3 ohm 3,0 ohm 3,4 ohm 3,3 ohm
Voice coil inductance, 1 kHz 0,45 mH 1,5 mH 1,1 mH 1,1 mH
BL product 6,28 7,8 11,5 12,22
X-max +-5 mm (0,2”) +-5 mm (0,2”) +-5 mm (0,2”) +-5 mm (0,2”)
Suspension compliance CMS 586 491 349 317
SD- Effective piston area 181,5 cm
2
214 cm
2
314,6 cm
2
452,3 cm
2
Resonant freq. (Fs) 40 Hz 36,4 Hz 36 Hz 30 Hz
Vas (liters) 27,1 30,6 48,6 115
Vas (ft
3
) 0,96 1,08 1,72 4,06
Qms 1,81 3,55 2,49 3,26
Qes 0,57 0,45 0,32 0,36
Qts 0,43 0,40 0,28 0,34
Cone material Coated non-compress paper on all models
Magnet weight 40 oz (1,13 kg) 40 oz (1,13 kg) 40 oz (1,13 kg) 50 oz (1,42 kg)
Magnet diameter 4,7" (120 mm) 4,7" (120 mm) 5,7" (145 mm) 6,14" (156 mm)
Installation depth 3,94" (100 mm) 3,94" (100 mm) 4,4" (112 mm) 5,04" (128 mm)
Mounting hole 7,08" (180 mm) 7,08" (180 mm) 8,86" (225 mm) 10,8" (274 mm)
Outer diameter 10,31" (210 mm) 12,2" (210 mm) 10,08" (256 mm) 12,12" (308 mm)
Weigth 5,95 lb (2,7 kg) 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 W108B, W308B, W310B & W312B
VENTED ENCLOSURE
Subwoofer Volume (liters/ft3) Port Damping F3 Fb
W108B vol: 20,6 / 0,73 3” x 17 cm/6,7” Line inside 49,8 Hz 48,0 Hz
W308B vol: 18 / 0,64 3” x 27 cm/ 10,6” Line inside 49,9 Hz 45,0 Hz
W310B vol: 28,5 / 1,0 3” x 14 cm/5,5” Line inside 48,4 Hz 45,0Hz
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.
22