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SB 115A
active subwoofer
user manual
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Musikhaus Thomann e.K.
Treppendorf 30
96138 Burgebrach
Germany
Telephone: +49 (0) 9546 9223-0
E-mail: info@thomann.de
Internet: www.thomann.de
27.09.2012
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Table of contents
1 General notes............................................................................................................................................... 4
2 Safety instructions..................................................................................................................................... 7
3 Features....................................................................................................................................................... 12
4 Installation.................................................................................................................................................. 13
4.1 Pin assignment.................................................................................................................................. 14
4.2 Tips on handling speakers............................................................................................................ 15
5 Connections and operating elements........................................................................................... 16
6 Technical specifications....................................................................................................................... 19
7 Protecting the environment.............................................................................................................. 21
Table of contents
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General notes
This user manual contains important information on safe operation of the device. Read and
follow all safety notes and all instructions. Save this manual for future reference. Make sure
that it is available to all persons using this device. If you sell the device to other users, be sure
that they also receive this manual.
Our products are subject to a process of continuous development. We therefore reserve the
right to make changes without notice.
This section provides an overview of the symbols and signal words used in this user manual.Symbols and signal words
General notes
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Signal word Meaning
DANGER! This combination of symbol and signal word
indicates an immediate dangerous situation
that will result in death or serious injury if it is
not avoided.
CAUTION! This combination of symbol and signal word
indicates a possible dangerous situation that
can result in minor injury if it is not avoided.
NOTICE! This combination of symbol and signal word
indicates a possible dangerous situation that
can result in material and environmental
damage if it is not avoided.
Warning signs Type of danger
Warning – high-voltage.
General notes
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Warning signs Type of danger
Warning – danger zone.
General notes
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Safety instructions
This device is intended to be used in a sound reinforcement system. Use the device only as
described in this user manual. Any other use or use under other operating conditions is consid‐
ered to be improper and may result in personal injury or property damage. No liability will be
assumed for damages resulting from improper use.
This device may be used only by persons with sufficient physical, sensorial, and intellectual
abilities and having corresponding knowledge and experience. Other persons may use this
device only if they are supervised or instructed by a person who is responsible for their safety.
DANGER!
Danger for children
Ensure that plastic bags, packaging, etc. are disposed of properly and are not
within reach of babies and young children. Choking hazard!
Ensure that children do not detach any small parts (e.g. knobs or the like) from
the unit. They could swallow the pieces and choke!
Never let children unattended use electrical devices.
Intended use
Safety instructions
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DANGER!
Electric shock caused by high voltages inside
Within the device there are areas where high voltages may be present. Never
remove any covers.
There are no user-serviceable parts inside.
DANGER!
Electric shock caused by short-circuit
Always use proper ready-made insulated mains cabling (power cord) with a pro‐
tective contact plug. Do not modify the mains cable or the plug. Failure to do so
could result in electric shock/death or fire. If in doubt, seek advice from a regis‐
tered electrician.
Safety instructions
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CAUTION!
Possible hearing damage
The device can produce volume levels that may cause temporary or permanent
hearing impairment. Over an extended period of time, even levels that seem to
be uncritical can cause hearing damage.
Decrease the volume level immediately if you experience ringing in your ears or
hearing impairment. If this is not possible, keep a greater distance or use suffi‐
cient ear protectors.
CAUTION!
Risk of injury due to heavy weight
Due to the heavy weight of the device, at least two persons are required for trans‐
port and installation.
Safety instructions
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NOTICE!
Risk of fire
Do not block areas of ventilation. Do not install the device near any direct heat
source. Keep the device away from naked flames.
NOTICE!
Operating conditions
This device has been designed for indoor use only. To prevent damage, never
expose the device to any liquid or moisture. Avoid direct sunlight, heavy dirt, and
strong vibrations.
Safety instructions
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NOTICE!
Power supply
Before connecting the device, ensure that the input voltage (AC outlet) matches
the voltage rating of the device and that the AC outlet is protected by a residual
current circuit breaker. Failure to do so could result in damage to the device and
possibly injure the user.
Unplug the device before electrical storms occur and when it is unused for long
periods of time to reduce the risk of electric shock or fire.
Safety instructions
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Features
n 1 × 15" woofer
n Output power: 300 W
n Frequency range: 35…260 Hz
n Adjustable high pass filter
n XLR type input and output connectors
n Trapezoidal housing with tripod mounting flange
Features
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Installation
Unpack and check carefully there is no transportation damage before using the unit. Keep the
equipment packaging. To fully protect the device against vibration, dust and moisture during
transportation or storage use the original packaging or your own packaging material suitable
for transport or storage, respectively.
Establish all connections as long as the unit is switched off. Use the shortest possible highquality cables for all connections.
NOTICE!
Possible property damage by magnetic fields
Loudspeakers produce a static magnetic field. Therefore, maintain an appropriate
distance to devices that can be adversely affected or damaged by an external
magnetic field.
Installation
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4.1
Pin assignment
You can use XLR plugs with balanced or unbalanced wiring. In the following we will give you
an overview of the various options.
XLR mounting sockets are used for signal inputs. XLR mounting plugs provide the output sig‐
nals. Drawing and table indicate the XLR pin assignment.
Balanced wiring:
1 Ground, shielding
2 Positive signal (+)
3 Negative signal (–)
XLR connections for signal in
and outputs
Installation
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Unbalanced wiring:
1 Ground, shielding
2 Signal
3 Bridged to pin 1
4.2
Tips on handling speakers
We recommend you to set up the speakers in a way, that the sound signals can reach the audi‐
ence unobstructedly. It will often be helpful to mount the speakers on tripods. Thus, the sound
will be evenly spread with maximum range throughout the audience area.
Always use high grade cable to connect your equipment. Otherwise you won't reach max‐
imum sound quality.
If you notice distortion during operation, the active speaker is overloaded. This may perma‐
nently damage the device. Always reduce the volume as soon as you hear distortion.
Installation
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Connections and operating elements
Connections and operating elements
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1 VOLUME
Volume control. Turn the knob clockwise to increase the volume or counterclockwise to decrease the volume.
2 HIGH CUT
Control knob to adjust the high pass filter frequency in a range from 80 to 250 Hz.
3 LED ACTIVE
Status LED which lights up during operation.
4 LED LIMIT
Indicates clipping. If this LED flashes or lights up, the input signal level is too high.
5 INPUT
Line input for connecting the woofer to the PA system.
6 OUTPUT
Line output for connecting a mid-range speaker or tweeter to the woofer (XLR type).
Connections and operating elements
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7 ON | OFF
Use the mains switch to power the unit on or off.
8 IEC chassis connector with fuse holder for operating voltage supply.
9 115V/60Hz | 230V/50Hz
Mains voltage selector. Before turning the unit on, make sure that this selector is set correctly for the actual supply
voltage available at the operating location!
Connections and operating elements
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Technical specifications
System Active subwoofer with high pass filter
Speaker 1 × 15" woofer
Connectors 1 × XLR type input
1 × XLR type output
Frequency range 40 Hz … 180 Hz (–3 dB)
35 Hz … 260 Hz (–10 dB)
Maximum SPL at 1 m 120 dB
Output power 300 W (RMS)
Harmonic distorsion 0.02 %
Impedance 4 Ω
Housing Polypropylene, trapezoidal, black
Technical specifications
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Dimensions (W × H × D) 485 × 700 × 460 mm (19.1 × 27.6 × 18.1 inches)
Weight 30.5 kg (67.2 lbs)
Technical specifications
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Protecting the environment
For the transport and protective packaging, environmentally friendly materials have been
chosen that can be supplied to normal recycling.
Ensure that plastic bags, packaging, etc. are properly disposed of.
Do not just dispose of these materials with your normal household waste, but make sure that
they are collected for recycling. Please follow the notes and markings on the packaging.
This device is subject to the European directive 2002/96/EC.
Do not dispose of the device with your normal household waste.
Dispose of this device through an approved waste disposal firm or through your local waste
facility. When discarding the device, comply with the rules and regulations that apply in your
country. If in doubt, consult your local waste disposal facility.
Disposal of the packaging mate‐
rial
Disposal of your old device
Protecting the environment
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Notes
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Musikhaus Thomann e.K. · Treppendorf 30 · 96138 Burgebrach · Germany · www.thomann.de
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