TW Audio C12 User manual

Operation manual C12

Operation manual C12
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Introduction
The C12 loudspeaker is a wedge loudspeaker in a low-profile enclosure. It therefore blends
perfectly into any environment. Inconspicuous. Elegant. Harmonious.
The coaxial loudspeaker use has a mid-high driver with 3“membrane/voice coil. The large
1.4“ mid-high horn ensures perfect dispersion characteristics in the mid-high tone range.
The passive crossover in the C12 loudspeaker sums up low and mid-range tones especially
accurately and phase-coherently. Thanks to the truly low takeover frequency of the mid-high
driver, the C12 loudspeaker sounds even more direct in the important voice range. And this
with standard amplifiers without additional corrections or expensive controllers.
The C12 loudspeaker is recommended for all applications where the concern is compact
size.
Instructions in this user manual
NOTE
CAUTION
WARNING
WARNING
Thank you for choosing a high-quality product “MADE IN GERMANY” from the brand
TW AUDiO.
If you lend your product to another party, inform that party of the safety-related operating pro-
cedures and hand over this assembly guide. If you require additional copies of this manual,
you can obtain them free of charge from TW AUDiO or download them from www.twaudio.de
Strictly adhere to the instructions contained in this operating manual that are marked as
follows:
This symbol in combination with the signal word “Warning” identifies a potentially hazardous
situation. Failure to comply with this safety instruction can lead to serious injury or even death.
This symbol in combination with the signal word “Warning” identifies a potentially hazardous
situation for persons with a pacemaker. Failure to comply with this safety instruction can lead
to serious injury or even death.
This symbol in combination with the signal word “Caution” identifies a potentially hazardous
situation. Failure to comply with this safety instruction can lead to light or moderate injury.
This symbol in combination with the signal word “Note” identifies a potentially hazardous
situation. Failure to comply with this safety instruction can lead to product damage.

Operation manual C12
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TIP
Notes on the products
Read manual
before use!
Before using the device, carefully read the operating manual and keep it with the C12 loudspe-
aker.
General information
Operation manual: OM-C12
Version 2.0 en, 01/2022
This symbol in combination with the signal word “Tip” identifies additional information or
notes that will simplify working with TWAUDiO products on the basis of practical experience.
© by TWAMBO 2022; all rights reserved.
All information contained in this operating manual was correct to the best of our knowledge
at the time of printing.
Quality warranties or assurance of suitability for a certain type of use based on the technical
specifications, dimensions and weights are not granted by TWAMBO.
TWAMBO also shall not assume liability for any secondary damage (property damage and/or
personal injury) nor for the failure to comply with this operating manual!
TWAMBO reserves the right to update this document based on recent developments.
TWAMBO GmbH
Karl-Hofer-Str. 42
14163 Berlin
Germany
Phone : + 49 (0) 71 41-48 89 89 0
Fax: + 49 (0) 71 41-48 89 89 99
E-Mail: [email protected]
WWW: www.twaudio.de

Operation manual C12
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Content
1. Safety | Intended use...................................................................................................... 5
2. Overview ........................................................................................................................ 7
2.1 Components ........................................................................................................... 7
2.2 Operating modes..................................................................................................... 8
3. Technical specifications .................................................................................................. 9
3.1 Data sheet............................................................................................................... 9
3.2 Connection diagram ................................................................................................ 9
4. Commissioning............................................................................................................. 10
4.1 Setup .................................................................................................................... 10
4.2 Rotating the HF horn ............................................................................................. 11
4.3 Operation .............................................................................................................. 12
4.4 Connecting the cable............................................................................................. 12
5. Transport and Storage.................................................................................................. 13
6. CE Conformity Declaration............................................................................................ 14
7. Disposal ....................................................................................................................... 15

Operation manual C12
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1. Safety | Intended use
The C12 loudspeaker was developed for use in professional sound systems. The loudspea-
ker may only be used by trained and qualified personnel.
WARNING
WARNING
WARNING
NOTE
NOTE
Please adhere to the following safety instructions to avoid risks when operating loudspeakers.
Note the operating modes described in this operating manual. Other uses are not permis-
sible.
Damage caused by improper use is not covered by TWAMBO.
Loudspeakers generate an electromagnetic field. Persons with pacemakers are not permit-
ted to remain in the immediate vicinity of loudspeakers as the electromagnetic fields can
cause pacemakers to malfunction.
When working with heavy loads exceeding 20 kg (44 lbs.), use suitable aids (dollies, hoisting
slings, etc.). Multiple persons may be required depending on the situation.
Ensure that the units are in a stable position and are firmly attached. A falling loudspeaker can
result in serious personal injury and property damage.
When using and assembling TW AUDiO loudspeakers, only use materials specified by
TW AUDiO. These tasks must be performed by qualified personnel. Adhere to the applicable
safety regulations.
When setting up loudspeakers, ensure that they are not exposed to the following ambient
conditions:
• Direct sunlight
• Humidity
• Jolting
• Dust
Keep away from the immediate vicinity of loudspeakers that are operated at high sound pres-
sure levels. These loudspeaker systems are capable of endangering your health. Sound levels
beginning as low as approximately 90dBSPL can lead to long-term hearing impairment.
Avoid:
• Feedback
• Distorted signals (clipping) and
• Peaks resulting from switching on devices, plugging in devices or unplugging devices during
operation.
Such signals can lead to loudspeaker overload and ultimately to loudspeaker failure.

Operation manual C12
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WARNING
NOTE
NOTE
Ensure that the loudspeaker is not exposed to permanent thermal overloads. Thermal over-
loads may cause a fire and result in serious personal injury and property damage.
Note that TWAMBO does not provide a warranty for damage that can be attributed to this type
of overload and therefore cannot be held liable for any secondary damage.
A permanent magnetic field is present in the immediate vicinity of loudspeakers. Ensure that
objects which react sensitively to magnetic fields are not located in the immediate vicinity of
the loudspeaker. In particular, this applies to magnetic storage media, magnetic stripe cards
such as debit cards and CRT displays. A distance of approximately one meter is sufficient to
avoid damage.
Check loudspeakers and accessory parts regularly for visible wear. This is essential to ensure
continuing fault-free operation. Worn parts should be replaced immediately. Spare parts are
available from TWAUDiO.

Operation manual C12
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2. Overview
2.1 Components
1. Rotating horn with 1.4“ compression driver
2. Acoustic baffle
3. Cutout for feet for safely stacking loudspeakers
4. Ergonomic carrying handles (left and right)
5. SpeakON® connectors (3 pieces)
6. Top rigging track
7. Side rubber feet (4 pieces)
8. Bottom rigging track with integrated cabinet flange
9. Selection switch for operating mode (biamp / passive)
10. Bottom rubber feet (4 pieces)
11. Rear rigging track
12. Type label
Figure 2.1 - Overview
2
3
1
5
6
4
7
8
59
4
10
11
12

Operation manual C12
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2.2 Operating modes
The C12 loudspeaker has a selection switch for switching between two different operating
modes in the side cut-out of the connector panel (Pos. 9 - Figure 2.1).
Figure 2.3 - selector switch
NOTE
Never change the operating mode while the loudspeaker is connected. In addition to setting
the switch, the corresponding preset on the amplifier must be changed.
Operating with an incorrect preset can damage parts of the loudspeaker.
In the „PASSIVE“ mode, the loudspeaker is operated on a passive audio crossover with a
single amplifier channel.
In „Biamp“ mode, the woofer (1×12“) and high frequency path (1×1.4“) are operated with
separate amplifier channels. The high pass filter for the high frequency driver and low pass
filter for the low frequency driver remain operational in the signal path and in circuit even in
„Biamp“ mode (Figure 3.2 on page 9.)

Operation manual C12
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3. Technical specifications
3.1 Data sheet
Operating mode
Biamp Passive
Drivers 1x 12“ LF / 1x 1,4“ HF
Frequency response 62 - 17000 Hz
Power handling (program/Peak) 700 / 1400 W LF
280 / 560 W HF 700 / 1400 W
Impedance 8 Ω LF
20 Ω HF 8 Ω passive
Coverage angles (h x v) In wedge operation 55° x 70° HF horn, rotating
Max. SPL / 1m 132 dB
Dimensions (h x w x d) 348 x 445 x 525 mm [13,70 x 17,52x 20,67 in]
Weight 19,6 kg [43.2 lbs]
Surface Warnex textured paint
3.2 Connection diagram
Figure 3.2 - Connection diagram
LF 12" + HF 1,4"
PASSIVE
X-OVER
PIN 1+
PIN 1-
PIN 2+
PIN 2-
8 OHM
parallel
BIAMP / PASSIVE
PIN 1+
PIN 1-
PIN 2+
PIN 2-
1,1 kHz
PIN 1+
PIN 1-
PIN 2+
PIN 2-
parallel
HP
TP
(PASSIVE is ON)

Operation manual C12
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4.1 Setup
The C12 loudspeaker is designed for horizontal operation as a monitor as well as standing,
vertical operation. TWAUDiO provides a wide range of accessories to securely attach the
loudspeaker.
NOTE
WARNING
4. Commissioning
WARNING
Make sure that all system structures are located on a firm, level surface and that the surface
can bear the total weight!
TW AUDiO recommends using only the accessories specified by TWAUDiO for securing and
mounting loudspeakers.
Make sure the speakers are securely fastened to prevent personal injury and property damage.

Operation manual C12
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4.2 Rotating the HF horn
The horn of the C12 loudspeaker is positioned such that the horizontal coverage is 55° and
the vertical coverage is 70°. In some situations, it may be advantageous to switch the cover-
age of the high-frequency range. To do this, you can rotate the horn of the C12 loudspeaker.
Proceed as follows.
1. Place the C12 loudspeaker with the wedge inclined toward you with the grill facing up.
Ensure that the working surface is clean with a non-slip finish.
2. To remove the front grill of the loudspeaker, use a 3 mm hex key. Remove the four screws
on the top and bottom of the loudspeaker enclosure (two on each side).
3. Release the four screws of the horn using a 5 mm hex key.
4. Pull the horn upward out of the loudspeaker enclosure.
5. Now rotate the horn base by 90°. Ensure that you hold onto it firmly at all times. This will
prevent damage to the woofer membrane. Now screw the horn back on. For this purpose,
use a 6-Nm torque wrench.
6. Check that the foam between the grill and horn is properly seated.
7. Screw the front grill back on hand-tight.
NOTE

Operation manual C12
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4.4 Connecting the cable
The pin connections of the C12 loudspeaker can be found in section 3.2 (“Connection dia-
gram”) on page 9.
The internal wiring of the C12 loudspeaker allows for parallel connection of multiple loudspe-
aker units.
NOTE
4.3 Operation
TW AUDiO recommends operating the C12 loudspeaker on a DSP controller. For this purpose,
only presets developed by TWAUDiO are recommended. The TWAUDiO system racks are
ideally suited for this purpose.
Please note the technical data in section 3.1 on page 9.
NOTE
NOTE
Before connecting the loudspeaker to the amplifier, ensure that the right preset has been
loaded.
Using a wrong, out dated or a preset not provided by TWAUDiO can lead to destruction of
the speaker.
Make sure that the amplifier’s specifications meet the requirements. Using an amplifier that
doesn’t meet the specifications can destroy the loudspeaker.
To create a cable connection with an amplifier rack from TW AUDiO, proceed as follows.
Ensure that the cable cross sectional area is sufficient (at least 1.5 mm²) to avoid power losses.
TW AUDiO recommends using the loudspeaker cables available from TWAUDiO.
When connecting the cables to the loudspeaker, ensure that polarity (+/-) and pin assignment
(1/2) are correct. Incorrect connection can lead to a significant change in the loudspeaker’s
sound characteristics and may damage the driver.
Please note that parallel connections will decrease the total impedance of your loudspeaker
configuration.
The total impedance and the resulting power of the speaker configuration must match the
output power of the amplifier.

Operation manual C12
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5. Transport and Storage
NOTE
Due to the C12 loudspeaker weighing over 20 kg [44 lbs.], two persons are required to handle
and transport the unit.
To enable a single person to transport two C12 loudspeakers, TWAUDiO recommends
using the CaseC12.
• CaseC12 (flightcase for two C12)
When transporting and storing the unit, it is important to ensure that the surface and front
grill of the loudspeaker are not damaged. Moisture can penetrate through exposed wood
surfaces and cause the wood to swell. A bent or broken front grill will no longer adequately
protect the sensitive speaker membranes.
In addition, appreciable dust deposits may considerably impair the functionality of a loudspe-
aker membrane. For this reason, the loudspeakers should be transported and stored in a
safe, careful, dry and largely dust-free manner.
The following accessory parts for transport and storage are available from TW AUDiO:
The original packaging is unsuitable as permanent storage and transport packaging.

Operation manual C12
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as well as all model variants based on these, provided that they correspond to the original
factory models and have not been technically modified in any way.
Applicable directives:
• 2001/95/EG
• 2011/65/EU
Applicable national standards and technical specifications:
• DIN EN 18 800
• DIN EN ISO 12 100
• DGUV Vorschrift 17 und 18
• EN 50581: 2013-02
Berlin, Germany, January 1st, 2021
Bernhard Wüstner
5
This declaration applies to the following components
• C12
6. CE Conformity Declaration
Copy and translation of the original CE Conformity Declaration:
We hereby declare that the below-referenced components by virtue of their design and
construction, and in the configuration placed on the market by us, satisfy the safety and
health requirements of the applicable EC directives. This declaration becomes invalid in
case of modifications that have not been approved by us.

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7. Disposal
It is prohibited to dispose of used electrical equipment with household refuse.
All TWAMBOGmbH products are so-called B2B-products. This means that they are sold by
a commercial business to a commercial business. TWAMBO products that bear the trash can
symbol shown here may only be disposed of by TWAMBO.
The loudspeaker owner is legally responsible for proper disposal of used devices that do not
bear this symbol. This pertains to all products delivered prior to March 29, 2010. Nevertheless,
TWAMBO will also be happy to assist you in this case.
If you have any question regarding the disposal of used devices, please contact us under the
following telephone number:
+49 (0) 71 41 - 48 89 89 0
Thus, TWAMBO is in strict compliance with the Waste Electrical and Electronic Equipment
Directive (2012/19/EU) for the protection of our environment.
TWAMBO is registered under the following WEEE-reg.-no. with the German National Register
EAR as a B2B-manufacturer and distributor of electrical devices:
DE93295191
In countries outside of the European Union, comply with local regulations.

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TWAMBO GmbH
Karl-Hofer-Str. 42
14163 Berlin
Germany
Phone: + 49 (0) 71 41-48 89 89 0
Fax: + 49 (0) 71 41-48 89 89 99
E-Mail: [email protected]
WWW: www.twaudio.de