Owner’s Manual
DLS On-wall speakers
Flatsub Midi
audio for Life
since 1979
The information contained in this manual is subject to change without prior notice. The
most current version of this manual is available on our official website at:
www.dls.se
Introduction!
Please read this manual fully before unpacking and installing the product. It will help you to optimise the performance of your speakers.
Unpacking and maintenance
Your speaker should be treated with the same care you would treat a
piece of furniture. Use only a piece of soft cloth to clean the loudspeakers. After unpacking, we suggest you retain all packing material for
future transports.
Running-in period
The performance of the speaker will change subtly during the listening
period.
Please allow your new speakers to play about 20 hours of music at
normal listening level before doing any critical listening.
System
DLS Flatsub Midi is an efficient, active subwoofer with a built-in 150 Watt
digital power amplifier. The loudspeaker unit is a specially developed,
8”, long-stroke woofer with a powerful magnetic system.
DLS active subwoofers are designed to interact with Hi-Fi equipment,
surround installations and multi-media systems. The subwoofer allows
great freedom in placement. With the control you can adjust phase,
crossover frequency and level, which makes it easy to adjust for the
acoustics in your listening room.
Connecting power supply
The switch "Power" is the on/off switch for the subwoofer. Normal position is AUTO ON which makes the subwoofer start with the rest of your
system, POWER LED glows green. After a period without input signal
the amplifier atomatically reverts to standby, POWER LED glows red.
The power switch "OFF" position is used when the subwoofer should
not be used for some time.
CAUTION!
If you hear distortion when you increase the volume this is normally a
sign of overloading the subwoofer and you should immediately reduce
the level. We recommend that you use the volume control with care.
Service
Should your DLS loudspeaker system require service, or if you
have difficulty in achieving the fine performance of which your DLS
loudspeaker system is capable, consult the DLS dealer from whom
the system was purchased. Your dealer has the knowledge required
to provide expert advice and assistance. In case the DLS dealer is
unable to assist you, you are welcome to contact the DLS Technical
Department.
DESCRIPTION OF SUBWOOFER AMPLIFIER AF100
LINE LEVEL INPUT
RCA socket for line low level input
LINE LEVEL OUTPUT
For connection to another unit
POWER
Main power switch
POWER INPUT SOCKET
Power input socket with fuse holder
VOLTAGE SELECTOR SWITCH
To adjust amplifier for 115 or 230 V connection
POWER LED
Red for standby and Green for subwoofer active
VOLUM E
Control for adjusting subwoofer level to system
FREQUENCY
Control for adjusting the x-over frequency to
the subwoofer.
Warranty
This DLS loudspeaker is warranted to the original purchaser, against
factory defect in material or workmanship, for a period of one (1)
year from the date of original purchase. This warranty is valid only
in the country of purchase, to the original purchaser and is nontransferable.
DLS loudspeakers are music listening devices and should be used for
listening purposes only
They must not be connected to any other equipment than amplifiers
within the specified power range.
DLS cannot be held responsible for damage or injuries caused by
improper use, or use in violation with the recommendations in this
leaflet.
IMPORTANT!
Before connecting electricity to the power supply, it is important that
the POWER switch is OFF and check that the AC switch 115V - 230 V
is set at correct voltage for your country
Connect the subwoofers input signals before you switch the POWER
switch to AUTO ON.
Marking by the ”CE” symbol indicates compliance of
this device with the EMC (Electromagnetic Compatibility) and LVD (Low Voltage Directive) standards of the
European Community
This product must be returned to the separate collection system for electronic products. Do not dispose
this product together with general household waste.
Technical data for amplifier module AF100
Used in Flatsub Midi
Output power:
Woofer unit:
Cross-over frequencies:
Sensitivity, line in:
Phase:
Frequency range:
25 - 200 Hz when mounted on
150 Watts class D
8" / 20 cm
40-200 Hz
200 mV / 12 kohm
0° to180° continuously
wall or on the floor
IMPORTANT SAFETY INFORMATION!
1. The AC power cord must be connected to an AC outlet where it
can be easily disconnected from the power source. A fixed installation
of the power cord is not allowed.
2. The subwoofer must be connected to an AC outlet with protective
ground.
3. Do not use this subwoofer in damp areas and protect it from water.
4. Do not place objects filled with water, such as vases, on the
subwoofer.
5. Unplug the subwoofer during lightning storms or when unused for
long periods of time.
SOUND ADJUSTMENTS
1
2
3
B
Date Description ApprovalsIssue #
1
2
3
Date Description ApprovalsIssue #
VOLUME control
This control is used to adjust the balance between subwoofer and front or
satellite speakers. Once you have found a pleasant balance there should
be little need for further adjustments. Trust your ears and your personal
taste to find the correct setting.
LOW-PASS FREQUENCY control.
The active crossover network of the DLS Flatsub can be continuously adjusted from 40 to 200 Hz. This frequency is the split frequency between the
subwoofer and the front or satellite speakers. A higher crossover frequency
eases the load of the front speakers while a lower crossover improves the
stereo image. As with the level control you need to try out what suits your
equipment, room and ears the best.
PHASE control.
This control changes the phase of the subwoofer sound continuously from 0
to180°. Normal position is 0°, but for reasons of placement it could occur that
subwoofer and front speakers are out of phase at the crossover frequency.
You recognize this as weak bass reproduction that just barely can be adjusted with the level control. Instead you adjust the phase. Turn the control
slowly clockwise while playing music until you here the bass sound improve,
your ears are the proper instrument to decide when the sound is correct.
Placing in the room
The Flatsub subwoofers are designed for hanging on a wall, down near
the floor as in the photo, or any other position on the wall. A wall bracket
is included with the speaker. The wall bracket is attached on the wall
as in the drawing below.
Another way is to place it lying under a furniture, for example a sofa.
Wall
bracket
CONNECTION ALTERNATIVES:
- SURROUND SYSTEM CONNECTIONS
Surround amplifiers provide a separate subwoofer line output, use a "Line
Cable" from this output to LINE IN left (L), fig. 1. You can also use a "Split
Cable" to connect the subwoofer line output to both LINE IN, left (L) and
right (R), fig.2. The sensitivity then increases with 6 dB. This way to connect is to be preferred.
2-CHANNEL STEREO CONNECTIONS
-Line level input
Should your amplifier have separate pre-amplifier outputs, you should
connect those to LINE LEVEL INPUT, left (L) and right (R). Use a "Stereo
Line Cable". Your front speakers remain connected to the loudspeaker
outputs of the stereo amplifier.
Amplifier
Amplifier
fig 1
fig 2
Contact:
DLS Svenska AB
P.O. Box 13029,
SE-402 51 Göteborg
SWEDEN
Phone: +46 31 840060,
Fax: +46 31 844021
e-mail: info@dls.se, www.dls.se
Copyright© DLS Svenska AB. All rights reserved
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