TECHNICAL SPECIFICATIONS FOR DLS ULTIMATE SUBWOOFERS
SP12
SP15
SP15S
SP18S
Size
30 cm (12")
37,5 cm (15")
37,5 cm (15”)
45 cm (18”)
Impedance
2 x 2 ohm
2 x 2 ohm
4 x 2 ohm
3 x 2 ohm
Nom. power (RMS)
500 W (max 800)
500 W (max 800)
500 W (max 800 )
500 W (max 800 )
Maxiumum power for SPL use 1200 W
1200 W
2000 W
2000 W
Freq. range
20 Hz- 2 kHz
15 Hz-2 kHz
15 Hz - 1 kHz
13 Hz - 1 kHz
Sensitivity
97,3 dB
99,9 db
88,1 dB
90,5 dB
Voice coil diameter
75 mm (3”)
75 mm (3”)
75 mm (3”)
100 mm (4”)
Voice coil height
32 mm (1,26”)
32 mm (1,26”)
28 mm (1,1”)
32 mm (1,1”)
Re
1,27 ohm*
1,25 ohm*
1,8 ohm**
2,2 ohm**
Voice coil inductance, 1 kHz
0,52 mH
0,57 mH
0,96 mH
1,16 mH
BL product
8,73*
8,49*
9,53**
12,07**
X-max
+-12 mm (0,47”)
+-12 mm (0,47”)
+-12 mm (0,47”)
+-12 mm (0,47”)
Suspension compliance CMS
344
240
753
936
SD- Effective piston area
452,3 cm
2
754,8 cm
2
754,8 cm
2
Resonant freq. (Fs)
30,5 Hz
33,2 Hz
39 Hz
31,9 Hz
Vas (liters)
98,76
191,7
72,4
177
Vas (ft
3
)
3,48
6,77
2,55
6,25
Qms
4,42*
4,22*
6,94**
5,33**
Qes
0,25*
0,35*
1,07**
0,8**
Qts
0,24*
0,32*
0,92**
0,7**
Cone material
Paper
Paper
Paper
Paper
Magnet weight
200 oz (5,67 kg)
200 oz (5,67 kg)
200 oz (5,67 kg)
200 oz (5,67 kg)
Magnet diameter
8,7" (220 mm)
8,7" (220 mm)
8,7" (220 mm)
8,7" (220 mm)
Installation depth
5,71" (145mm)
6,89" (175 mm)
6,89" (175 mm)
8,66” (220 mm)
Mounting hole
11,22" (285 mm)
14,17" (360 mm)
14,17" (360 mm)
16,9” (430 mm)
Outer diameter
12,4" (315 mm)
15,35" (390 mm)
15,35" (390 mm)
18,3” (465 mm)
Weigth
28,66 lb (13 kg)
29,54 lb (13,4 kg)
29,54 lb (13,4 kg)
43,65 lb (19,8 kg)
* Data measured with VC connected in parallel
** Data measured on single voice coil
VENTED ENCLOSURES FOR SP12 & SP15
VENTED ENCLOSURE
Subwoofer
Volume (liters/ft3)
Port
Damping
F3
Fb
SP12 single VC
vol: 41,9 / 1,48
4” x 35 cm/13,8”
Line inside
38,1 Hz
38,6 Hz
SP12 par. VC
vol: 36,9 / 1,30
3” x 25 cm/9,84”
Line inside
30 Hz
32 Hz
SP12 ser. VC
vol: 40,4 / 1,43
4” x 17 cm/6,7”
Line inside
50 Hz
50 Hz
SP15 single VC
vol: 60 / 2,12
2x4” x 35 cm/13,8”
Line inside
53 Hz
45,0 Hz
SP15 ser. VC
vol: 60,55 / 2,14
2x4” x 37 cm/14,5”
Line inside
44,7 Hz
44,0 Hz
BANDPASS ENCLOSURES
SP12, single VC
Vb1
Vb2
Port Vb2
29,4
17,3
1x10,2x29 cm
1,04 ft
3
0,61 ft
3
1x4"x11,4" (US)
F3 Vb1: 40 Hz, Vb2: 102 Hz
SP15 , single VC
Vb1
Vb2
Port Vb2
52,8
58,3
2x16x25 cm
1,86 ft
3
2,05 ft
3
2 x 6" x 9,8" (US)
F3 Vb1: 50 Hz, Vb2: 111,6 Hz
Vb1=rear, Vb2=front
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 ENCLOSURE
SP15
: 54,5 liters, F3: 67,5 Hz
1,92 ft
3
(Use only one voice coil)
SEALED ENCLOSURE
FOR SP15
SPL ENCLOSURES FOR SP12, 15, 15S, 18S
The enclosure examples can be used only for the reproduction of normal
music. If you want to use these subwoofers for SPL competition, which
they are designed for, the design of an enclosure is more complicated.
The vehicle must be modified in many ways and the enclosure must be
individually designed for each vehicle type and also for the different
competition classes.
You are welcome to contact DLS for advices.
On our website www.dls.se /support you will find some helpful hints (PDF
document) regarding the build of SPL competition vehicles.
RUNNING-IN PERIOD
Allow the speaker to play for at least 15-
20 hours. After this time the
performance is correct.
