Specifications

TECHNICAL SPECIFICATIONS FOR DLS ULTIMATE SUBWOOFERS
SP12 SP15
Size 30 cm (12") 35 cm (15")
Impedance 2 x 2 ohm 2 x 2 ohm
Nom. power (RMS) 500 W (max 800) 500 W (max 800)
Maxiumum power for SPL use 1200 W 1200 W
Freq. range 20 Hz- 2 kHz 15 Hz-2 kHz
Sensitivity 97,3 dB 99,9 db
Voice coil diameter 75 mm (3”) 75 mm (3”)
Voice coil height 32 mm (1,26”) 32 mm (1,26”)
Re 1,27 ohm* 1,25 ohm*
Voice coil inductance, 1 kHz 0,52 mH 0,57 mH
BL product 8,73 8,49
X-max +-12 mm (0,47”) +-12 mm (0,47”)
Suspension compliance CMS 344 240
SD- Effective piston area 452,3 cm
2
754,8 cm
2
Resonant freq. (Fs) 30,5 Hz 33,2 Hz
Vas (liters) 98,76 191,7
Vas (ft
3
) 3,48 6,77
Qms 4,42 4,22
Qes 0,25 0,35
Qts 0,24 0,32
Cone material Paper Paper
Magnet weight 200 oz (5,67 kg) 200 oz (5,67 kg)
Magnet diameter 8,7" (220 mm) 8,7" (220 mm)
Installation depth 5,71" (145mm) 6,89" (175 mm)
Mounting hole 11,22" (285 mm) 14,17" (360 mm)
Outer diameter 12,4" (315 mm) 15,35" (390 mm)
Weigth 28,66 lb (13 kg) 29,54 lb (13,4 kg)
* Data measured with VC connected in parallel
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
SP12: We dont recommend the
use of sealed enclosure
SP15: 54,5 liters, F3: 67,5 Hz
1,92 ft
3
(Use only one voice coil)
SEALED ENCLOSURES
FOR SP12 & SP15
SPL ENCLOSURES FOR SP12 & SP15
The enclosures above 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.
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