User manual DLS SP15S

[. . . ] Larger enclosures must have bracing inside to avoid vibrations. The enclosure must be completely airtight. Use sealing compound in all joints, also around the cable terminals. The size of the enclosure is decided by the speaker data. SEALED ENCLOSURES Sealed enclosures are easy to build. [. . . ] Component values are for 4 ohms. VENTED ENCLOSURES A speaker in a vented enclosure has a higher efficiency (3 dB) and higher power handling capacity than in a sealed enclosure. In a vented enclosure the sound from the speaker and the port work together creating a higher sound level. The sound from the port must come out in the same phase as from the speaker otherwise the result is bad. The size of the vented enclosure is decided by the speaker data just as for the sealed one. The size of the vehicle often decides the practical size of the enclosure. A smaller enclosure has a higher resonant frequency than the larger one. The size of the enclosure should not be so big that the speaker plays below it´s own free air resonance (Fs), then it looses in power handling capacity. The port does not have to be fully inside the enclosure as long as the area and length are correct. Sometimes you need two or more ports in an enclosure. You can convert from one to two or more ports as long as the total port area is the same. All DLS subwoofers works well in vented boxes. + - Connected with a 12 dB passive low-pass x-over = 10 mH coil in series and a bipolar capacitor of 300 microFarad in parallel. Crossover frequency is 95 Hz. Active filter Connection in mono bridge mode with an active x-over. If you have a 1 ohm stable amplifier the voice coils should be connected in parallel for best performance (for example on a DLS monoblock). Valid from 2003-12-01 7654321 7654321 7654321 L C Amplifier BANDPASS ENCLOSURES In all bandpass enclosures the speakers are hidden inside the enclosure, all sound is coming out through the ports. There are different types of bandpass enclosures and they have in common that they are a bit more difficult to build. Most DLS subwoofers can be used in bandpass enclosures. IMPORTANT! The speaker cones of UR10, 12 & 15 are made of magnesium, a material of low weight with excellent acoustic qualitys. We recommend you NEVER to touch the cone body with you fingers. Remaining deformation of the cone body will occour if you push it with your fingers. Also think of the speaker weight when you mount it. If you don´t mount it properly it can get loose. TECHNICAL SPECIFICATIONS FOR DLS ULTIMATE SUBWOOFERS Revised data for UR10 valid from production date 2003-07-01. Revised data for UR12 valid from production date 2003-12-01. UR10 Size Impedance Nom. range Sensitivity Voice coil diameter Voice coil height Re Voice coil inductance, 1 kHz BL product X-max Suspension compliance CMS SD- Effective piston area Resonant freq. (Fs) Vas (liters) Vas (ft3) Qms Qes Qts Cone material Magnet weight Magnet diameter Installation depth Mounting hole Outer diameter Weigth 25 cm (10") 2 x 4 ohm 400 W (max 700) 25 Hz- 2 kHz 85, 6 dB 75 mm (3") 42 mm (1, 65") 1, 92 ohm* 0, 8 mH 13, 1 +-14 mm (0, 55") 80, 2 314, 6 cm2 42, 3 Hz 13, 9 0, 5 5, 62 0, 40 0, 37* (0, 7 with single VC) Magnesium 180 oz (5, 1 kg) 7, 1" (180 mm) 5, 24" (133 mm) 9, 29" (236 mm) 10, 39" (264 mm) 20 lb (9, 1 kg) UR12 30 cm (12") 2 x 4 ohm 500 W (max 800) 20 Hz-2 kHz 87, 2 db 75 mm (3") 42 mm (1, 65") 1, 6 ohm* 0, 89 mH 16, 1 +-14 mm (0, 55") 82 452, 3 cm2 36, 1 Hz 24 0, 85 4, 98 0, 32 0, 3* (0, 6 with single VC) Magnesium 200 oz (5, 67 kg) 8, 7" (220 mm) 5, 9" (150 mm) 11, 1" (282 mm) 12, 2" (310 mm) 28, 66 lb (13 kg) UR15 37, 5 cm (15") 2 x 4 ohm 500 W (max 800) 15 Hz- 2 kHz 90 dB 75 mm (3") 42 mm (1, 65") 1, 93 ohm* * Data measured with 0, 89 mH VC connected in parallel 13, 9 +-14 mm (0, 55") 146 854, 8 cm2 27, 5 Hz 116, 7 4, 12 4, 31 0, 40 0, 36* (0, 57 with single VC) Magnesium 200 oz (5, 67 kg) 8, 7" (220 mm) 6, 93" (176 mm) 14, 17" (360 mm) 15, 35" (390 mm) 29, 54 lb (13, 4 kg) RECOMMENDED ENCLOSURES FOR UR10, UR12 & UR15 RUNNING-IN PERIOD Allow the speaker to play for at least 1520 hours. [. . . ] The total length must be the same as for a straight tube. Make the measure in the center of the tube. The port opening inside the enclosure must not be closer to an interior wall than 3" (75 mm), otherwise it will have negative effects on the airflow. - The enclosure must be very steady and completely air-tight. [. . . ]