User Guide

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.