DLS Nobelium 10i Owner's Manual

ULTIMATE Nobelium
SERIES SUBWOOFERS
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
For example DLS SC 2x4.
ENCLOSURE DAMPING
Most enclosures should be damped inside with syntetic
(acoustic) wool or damping mat (line). Attach the damping ma-
terial on the wall opposite from the speaker and port. A sealed
enclosure should be filled up to 70-100% with acoustic wool.
RUNNING-IN PERIOD
Allow the speaker to play for at least 15-20 hours. After this
time the performance is correct.
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 e-mail
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.
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 a vented
enclosure, 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.
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
2
).
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 loose 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.
IMPORTANT!
Think of the speaker weight when you install it. If you don´t mount
it properly it can come loose.
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.
Nobelium 10i
Nobelium 12i
Nobelium 15
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