Page 1
ULTIMATE Nobelium
SERIES SUBWOOFERS
23456
7
L
+
-
C
Nobelium 10
Nobelium 12
Nobelium 15
Active filter Amplifier
Connection in mono bridge mode with an active x-over. Voice
coils connected in series. 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).
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.
Valid from 2005-07-04
WELCOME
Thank you for buying a DLS ULTIMATE Nobelium subwoofer.
The subwoofer must be installed correctly in order to work well.
This manual will show you how to install it like a pro. Please
read the entire manual before beginning the installation.
Install the subwoofer yourself if you feel confident with our
instructions and if you have the proper tools. However if you
feel unsure, turn over the installation job to someone better
suited to it.
The speakers are designed for enclosure mounting. In "open
air" installations the power handling capacity is reduced by 30%
from the nominal value. We dont recommend ”open air”
installations for Ultimate Nobelium subwooers.
CONNECTION OF SUBWOOFER
How to connect depends on what type of amplifier you use.
The best is to follow the instructions given in the manual for the
amplifier. Most amplifiers today have built-in lowpass crossover
and possibilities to connect your subwoofer in bridge mode.
Two 4 ohm subwoofers are often connected in stereo mode
since most amplifiers can´t handle bridge mode loads below 4
ohms.
The Iridium subwoofers have dual, four ohm, voice coils. Each
voice coil has an impedance of 4 ohms. If they are connected in
series the resulting impedance is 8 ohms. If they are connected
in parallel the resulting impedance is 2 ohms. Make sure to
connect in a way that don´t ruin the amplifier. If you have a DLS
Ultimate amplifier it´s possible to connect the voice coils in
parallel, these ampliers are 1 ohm stable.
We also recommend the use of a subsonic highpass filter. This
gives a better bass reproduction with less "rumble". In most
DLS amplifiers this feature is already built-in.
For wiring use high class speaker wires, min AWG13 (2.5 mm
2
).
For example DLS SC 2x4.
If you have an amplifier without built-in crossover you must use
a passive crossover between amplifier and subwoofer like in
this example, one crossover for each voice coil.
Component values are for 4 ohms.
SUBWOOFER ENCLOSURES, GENERAL
Build your enclosure in a stable and airtight material. The best
is MDF-board, 19 mm, or particle board, 22 mm. 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. The size is not critical, but
it can´t be too small. The speaker data such as Fs, Qts, Vas
and X-max decides the size of the enclosure.
Large speakers need larger boxes. Two speakers need a box
of the double size etc. The enclosure must be completely airtight.
A sealed enclosure should be filled with acoustic wool up to 75
- 100%.
A sealed enclosure has a lower efficiency than vented
enclosures but they can handle high power and are easy to
build.
A subwoofer in a sealed enclosure creates a tight bass suitable
for the audiophiles listening to classical music, jazz and soft
rock. The Nobelium subwoofers can be used in sealed
enclosures.
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), if so the power handling capacity drops.
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 Nobelium subwoofers can be usedl in vented boxes.
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. DLS Iridium
subwoofers can be used in bandpass enclosures.
IMPORTANT!
Think of the speaker weight when you install it. If you don´t
mount it properly it can come loose.
*Nobelium is a radioactive metal with atomic number 102. It is named after the Swedish scientist Alfred Nobel
Page 2
Technical specifications for DLS ULTIMATE Nobelium 10
Size 25 cm (10")
Impedance 2 x4 ohm
Nom. power (RMS) 500 W (max 800)
Frequency range 25 Hz - 2,5 kHz
Voice coil, diameter 75 mm (3”)
Voice coil, length 40 mm (1,57”)
X-max +-14 mm (0,55”)
SD 346 cm
2
Cone material Aluminium
Upper surround Rubber
Magnet weight 180 oz (5,1 kg)
Magnet, diameter 180mm (7,08”)
Installation depth 133 mm (5,24”)
Mounting hole 236 mm (9,29”)
Outer diameter 266 mm ( 10,47”)
Weight 9,5 kg (20,9 lb)
Size 30 cm (12")
Impedance 2 x4 ohm
Nom. power (RMS) 600 W (max 1000)
Freq. range 20 Hz - 2,5 kHz
Voice coil, diameter 75 mm (3”)
Voice coil, length 40 mm (1,57”)
X-max +-14 mm (0,55”)
SD 491 cm
2
Cone material Aluminium
Upper surround Rubber
Dual spiders Yes
Magnet weight 180 oz (5,1 kg)
Magnet, diameter 220mm (8,7”)
Installation depth 140 mm (5,51”)
Mounting hole 282 mm (11,1”)
Outer diameter 312 mm ( 12,28”)
Weigth 12,2 kg (28 lb)
Technical specifications for DLS ULTIMATE Nobelium 12
Data that can vary depending on how the voice coils are connected:
Single voice coil Voice coils in
4 ohm parallel 2 ohm
Re, DC-resistance 3,2 ohm 1,7 ohm
Z, impedance 4 ohm 2 ohm
Cms 143 143
Zo (Z max at Fs) 15,92 ohm 14,03 ohm
BL product 9,35 9,21
Sensitivity 85,6 dB 88,2 dB
Resonant freq. (Fs) 43,5 Hz 43,5 Hz
Vas (litre) 26,77 26,75
Vas (ft3) 0,95 0,95
Qms 3,72 3,72
Qes 0,93 0,51
Qts 0,75 0,45
Data that can vary depending on how the voice coils are connected:
Single coil, Voice coils in Voice coils in
4 ohm series, 8 ohm parallel, 2 ohm
Re, DC-resistance 3,5 ohm 7 ohm 1,9 ohm
Z, impedance 4 ohm 8 ohm 2 ohm
Cms 120,5 193,4 182,2
Zo, (Z max at Fs) 20,3 ohm 71,8 ohm 13,3 ohm
BL product 15,72 21,02 9,12
Känslighet (SPL at 1W) 85,6 dB 90,5 dB 88 dB
Resonant freq. (Fs) 32,2 Hz 34,6 Hz 33,8 Hz
Vas (litre) 41,25 66,1 62,3
Vas (ft3) 1,456 2,33 2,2
Qms 2,78 3,48 3,53
Qes 0,58 0,37 0,59
Qts 0,48 0,34 0,50
Size 37,5 cm (15")
Impedance 2 x4 ohms
Nom. power (RMS) 600 W (max 1000)
Frequency range 15 Hz - 2,5 kHz
Voice coil, diameter 75 mm (3”)
Voice coil, length 40 mm (1,57”)
X-max +-14 mm (0,55”)
SD 779 cm
2
Cone material Aluminium
Upper suspension Rubber
Magnet weight 200 oz (5,67 kg)
Magnet, diameter 220mm (8,7”)
Installation depth 176 mm (6,93”)
Mounting hole 360 mm (14,17”)
Outer diameter 390 mm ( 15,35”)
Weight 13,8 kg (30,4 lb)
Technical specifications for DLS ULTIMATE Nobelium 15
Data that can vary depending on how the voice coils are connected:
Single coil Voice coils in
4 ohm parallel 2 ohm
Re, DC-resistance 3,6 ohm 1,7 ohm
Z, impedance 4 ohm 2 ohm
Cms 142,5 142,5
Zo, Z max at Fs) 19,4 ohm 17,18 ohm
BL product 11,8 11,4
Sensitivity 90 dB 92,3 dB
Resonant freq. (Fs) 34,7 Hz 34,7 Hz
Vas (liter) 130,7 130,7
Vas (ft3) 4,6 5,6
Qms 3,62 3,77
Qes 0,82 0,49
Qts 0,67 0,43
Page 3
Nobelium12 (VC:s in parallel to 2 ohm)
Vb1 Vb2 Port Vb2
24,46 32,12 2 x10,2 x 27 cm
0,86 ft31,13 ft32 x 4" x 10,6" (US)
F3 Vb1: 45 Hz, Vb2: 94 Hz
Nobelium12 (Single VC, 4 ohm)
Vb1 Vb2 Port Vb2
23,95 22,37 1 x10,2 x 29 cm
0,84 ft30,79 ft31 x 4" x 11,4" (US)
F3 Vb1: 38,5 Hz, Vb2: 79 Hz
RECOMMENDED ENCLOSURES FOR Nobelium10, 12 and 15
VENTED BOX
Sub Connection Volume (litre/ft3) Port Damping F3 Fb
10” VC in parallel 31,65 / 1,1 3” x 18 cm/7,1” Line inside 39,3 Hz 39,0 Hz
12” Single VC 34,4 / 1,21 3” x 25,7 cm / 10” Line insida 33,7 Hz 33,0 Hz
12” VC in series 35,87 / 1,26 4” x 29 cm/ 11,4” Line inside 46,4 Hz 45,0 Hz
12” VC in parallel 46,10 / 1,1 4” x 32 cm / 12,6” Line inside 37,3 Hz 36,9 Hz
15” VC in parallel 56,5 / 1,99 2x4” x 40 cm / 15,7” Line inside 50,2 Hz 45,0 Hz
Nobelium10, single VC:
28 litres / 0,99 ft
3
F3: 52,7 Hz
Nobelium10, dual VC in parallel:
17,4 litres / 0,61 ft
3
F3: 73,4 Hz
Nobelium 12, single VC:
23,2 litres / 0,82 ft
3
F3: 51,9 Hz
Nobelium 12, dual VC in parallel:
43,72 litres / 1,54 ft
3
F3: 52,4 Hz
SEALED BANDPASS
Vb1=rear chamber,
Vb2=front chamber
SEALED BOX
RUNNING-IN PERIOD
Allow the speaker to play for at least 1520 hours. After this time the
performance is correct.
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
The speaker is installed in Vb1
playing into chamber Vb2 where the
port(s) are installed.
SEALED ENCLOSURES
VENTED ENCLOSURES
Nobelium10 (VC:s in parallel to 2 ohm)
Vb1 Vb2 Port Vb2
20,1 17 2 x6,8 x 27,6 cm
0,71 ft30,60 ft32 x 3" x 10,8" (US)
F3 Vb1: 44,8 Hz, Vb2: 86,6 Hz
Nobelium 15, single VC:
45 litres / 1,59 ft
3
F3: 51,5 Hz
Nobelium 15, dual VC in parallel:
40 litres / 1,41 ft
3
F3: 64,5 Hz
Page 4
THE SUBWOOFER
upper
suspension
voice coil
pole plate
magnet
spider
chassis
dust cap
cone
T-yoke
B
H
ÖD
ND
HINTS & TIPS FOR ”DO IT YOURSELF” ENCLOSURE BUILDERS
ABOUT THE RECOMMENDED ENCLOSURES
The performance of these recommended enclosures will vay
from vehicle to vehicle. It is more difficult to get a tight and well
defined bass in a SEDAN vehicle because of the tightness
between trunk and interior of the vehicle. In this case a bandpass box could be a better choise.
- All volumes are inside measures.
- Volumes occupied by speaker and ports have already been
added to the given enclosure volumes.
- Use conical bass ports for best result. (DLS BP-75 or BP-
110). If the ports are too long for the box you can use a bend.
Either cut the tube and glue it together in angle, or use factory
made tube bends. It´s easier to use the factory made ones. 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.
Use 22 mm particle board or 19 mm MDF-board. The particle
board has a self resonant frequency of 14 Hz while the MDF
has a resonant frequency of approx. 400 Hz. It´s important to
do some type of bracing inside the enclosure to avoid vibrations.
Volume taken up by bracing should be added to the enclosure
volumes.
ENCLOSURE DAMPING
Most enclosures should be damped inside with syntetic
(acoustic) wool or damping mat (line). Attach the damping material on the wall opposite from the speaker and port. A sealed
enclosure should be filled up to 70-100% with acoustic wool.
In a vented enclosure the speaker and port should be on the
same side, otherwise a fade-out of some frequencies can occour.
In most vehicles, except for SEDAN cars, the speaker and port
should be directed backwards for best result.
ENCLOSURE PLACING IN DIFFERENT TYPES OF
VEHICLES
In small vehicles like VW Golf, Peugeot 306 and similar the
bass box should be installed with both speaker and port directed
backwards. Alternatively booth speaker and port can be directed
upwards. This way of mounting is valid for all types of vehicles
where the trunk is incorporated with the inner compartment.
In sedan vehicles with the passenger compartment separated
from the trunk, the enclosure should be installed with booth
speaker and port directed towards the rear seat. Some cars
have an opening in the middle of the rear seat for loading skis
etc. You can install the enclosure behind this opening and direct
speaker or port through this opening. There must be some free
space in front of the port, (between the rear seat and the port
opening).
In large vehicles like station wagons the best sound is achieved
with the enclosure installed behind the rear seat with booth speaker and port directed backwards. Alternatively you can install
the enclosure on one side of the luggage compartment.
CALCULATE YOUR ENCLOSURE
Box volumes:
When caculating the volume of an enclosure you simply multiply
the width (W) x heigth (H) x depth (D).
Use measures in dm and you will get the answer in liters.
A trapezoid box is calulated as below:
Vol=width (W) x heigth (H) x upper depth (UD) + lower depth (LD)
2
Be sure to measure the
inside dimensions.
WARRANTY SERVICE
This speaker is covered by warranty, depending on the
conditions in the country where it is sold. If the speaker is returned for service, please include the original dated receipt with
the product.
Technical Assistance
For technical assistance ask the shop where the product was
sold or the distributor in your very country.You can always phone
the DLS Helpdesk in Sweden + 46 31 840060 or send an email to info@dls.e
Information can also be found on our WEB-site www.dls.se
We follow a policy of continuous advancement in development.
For this reason all or part of specifications & designs may be
changed without prior notice.
DLS Svenska AB
P.O. Box 13029
SE-40251 Göteborg, Sweden
Tel: +46 31 840060
Fax: +46 31 844021
E-mail: info@dls.se
www.dls.se
Loading...