Camco TECTON 38.4 User manual

TECTON USER MANUAL
USER MANUAL
TECTON POWER AMP SERIES P.1
INFORMATION FOR USE FOR TECTON
MODELS 38.4, 32.4, 24.4, 28.2, 22.2 and 14.2
TUM_GB_2004-2005-R1_04-2005
© Copyright 2005 by CAMCO Produktions- und Vertriebs- GmbH
für Beschallungs- und Beleuchtungsanlagen
Fischpicke 5, D-57482 Wenden, Germany
Telephone [phone]

IMPORTANT SAFETY INSTRUCTIONS
USER MANUAL
TECTON POWER AMP SERIES
P.2 USER MANUAL
TECTON POWER AMP SERIES P.3
IMPORTANT SAFETY INSTRUCTIONS
1) Read the information for use (user manual).
2) Please keep this user manual in a safe place during the lifetime of the ampli-
er. The user manual forms an integral part of the amplier. Reselling of the
amplier is only possible if the user manual is available. Any changes made to
the amplier have to be documentated in writing and passed on to the buyer
in the event of resale.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this amplier near water (for example, in damp rooms or near a
swimming pool).
6) Clean only with dry cloth.
7) Do not block any ventilation openings. Install in accordance with the user
manual.
8) Do not install near any heat sources such as radiators, heat registers, stoves, or
other apparatus that produce heat.
9) Protect the power cord from being walked on, pinched or damaged in any
other way. Pay particular attention to plugs and the point where they exit from
the amplier.
10) The amplier may only be used in accordance with the information provided
in the user manual. Before and during the usage of the amplier please ensure
that all recommendations, especially the safety recommendations as detailed in
the user manual, are adhered to.
The TECTON-Amplier is designed for the amplication of pulsed audio signals
and the amplier should only be connected to speakers with an average
impedance that is not lower than the impedances specied in points 3.8.3, 3.8.4
and 3.8.5.
11) Do not place this amplier on an unstable cart, stand,
tripod, bracket, or table. The device may fall, causing
serious injury, and serious damage to the device itself.
12) The amplier can only be disconnected from the power supply by removing
the plug, which must be freely accessible at all times. Unplug this amplier
during lightning storms or when unused for long periods of time.
13) Refer all servicing to qualied service personnel.
Servicing is required when
the power-supply cord or plug has been damaged,
liquid has been spilled or objects have fallen into the amplier,
the amplier has been dropped or damaged in any other way,
the amplier has been exposed to rain or moisture,
when the amplier exhibits a distinct change from its normal function or
performance.

CAUTION – RISK OF ELECTRIC SHOCK – DO NOT OPEN.
WARNING – TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS
AMPLIFIER TO RAIN OR MOISTURE.
CAUTION – HIGH VOLTAGE HAZARDS
EXIST WITHIN THIS PRODUCT.
REFER ALL SERVICING TO
AUTHORISED PERSONNEL.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
THE LIGHTNING FLASH WITH ARROW HEAD SYMBOL ALERTS
THE USER TO DANGEROUSLY HIGH VOLTAGE AT THE SPEAKON
CONNECTORS THAT COULD POTENTIALLY BE LIFE THREATENING.
THE LIGHTNING FLASH WITH ARROW HEAD SYMBOL, IS INTENDED TO
ALERT THE USER TO THE PRESENCE OF UNINSULATED DANGEROUS
VOLTAGE WITHIN THE PRODUCT’S ENCLOSURE.
THE EXCLAMATION MARK IS INTENDED TO ALERT THE USER
TO IMPORTANT INSTRUCTIONS ALSO FOR MAINTENANCE IN THE
LITERATURE ACCOMPANYING THE AMPLIFIER.
THE AMPLIFIER MAY ONLY BE CONNECTED
TO A SOCKET WITH A CONNECTION TO GROUND.
EXPLANATION OF SYMBOLS / SAFETY
USER MANUAL
TECTON POWER AMP SERIES
P.2 USER MANUAL
TECTON POWER AMP SERIES P.3
1. Read the information for use (user manual)
When shipping the TECTON amplier, always use the original shipping carton
and packing materials. For maximum protection, repack the unit as it was origi-
nally packed at the factory.
2. Environments
Use this amplier only in E1, E2, E3 or E4 environments according to EN55103-2
“Electro-magnetic compatibility – Product-family norm for audio, video and
audio-visual installations as well as for studio-and lighting-control installations
for professional applications – Part 2: Immunity“.
3. Ventilation
Slots and openings in the cabinet are provided for ventilation, to ensure reliable
operation of the amplier and to protect it from overheating. These openings
must not be blocked or covered. This amplier should not be operated unless
proper ventilation is provided or manufacturer’s instructions have been
adhered to.
4. Water And Moisture
Do not use this amplier near water (for example, in a wet basement or near a
swimming pool).
5. Cleaning
Unplug this amplier from the wall outlet before cleaning. Do not use liquid or
aerosol cleaners.
6. Power-cord Protection
Power-supply cords should be routed so that they are not likely to be walked on
or pinched by items placed upon them or against them, paying particular atten-
tion to cords and plugs, and the point where they exit from the amplier.

SAFETY
USER MANUAL
TECTON POWER AMP SERIES
P.4 USER MANUAL
TECTON POWER AMP SERIES P.5
7. Lightning
For added protection of this amplier during lightning storms, or when it is
left unattended and unused for long periods of time, unplug it from the wall
outlet. This will prevent damage to the amplier due to lightning and power-
line surges. Disconnection from the mains power supply can only be achieved
by removing the plug from the mains socket and by external disconnecting all
poles from the mains.
8. Interference of external objects and/or liquids with the appliance
Never push objects of any kind into this amplier through openings as they may
touch dangerous voltage points or short out parts that could result in a re or
electric shock. Never spill liquid of any kind on the amplier.
9. Accessories
Do not place this amplier on an unstable cart, stand, tripod, bracket, or table.
The amplier may fall, causing serious injury, and serious damage to the product.
Any mounting of the amplier should follow the manufacturers instructions,
and should use a mounting accessory recommended by the manufacturer.
10. Connecting
When you connect the amplier to other equipment, turn off the power and
unplug all of the equipment from the supply source. Failure to do so may cause
an electric shock and serious personal injury. Read the user manual of the other
equipment carefully and follow the instructions when making the connections.
11. Sound Volume
Reduce the volume to minimum before you turn on the amplier to prevent
sudden high levels of noise which may cause hearing or speaker damage. (See
also 4.1.1 Volume control)
12. Damages that require service
Unplug this amplier from the mains supply and refer to your dealer/distributor
or other authorised repair workshop if any of the following situations occur:
if liquid has been spilled, or objects have fallen into the amplier.
if the amplier does not operate normally as described in the user manual.
Operate the controls only as described in the user manual.
if the amplier has been dropped or damaged in any other way.
when the amplier exhibits a distinct change from its normal function or
performance.
13. Servicing
Do not attempt to service this amplier yourself. As opening or removing covers
may expose you to dangerous voltage or other hazards, the amplier may only
be opened by qualied personnel. Please refer to your dealer/distributor.
14. Servicing and Replacement Parts
All service and repair work must be carried out by a CAMCO authorised dealer.
When replacement parts are required, please ensure that the dealer/distributor
only uses replacement parts specied by the manufacturer. The use of un-
authorized replacement parts may result in injury and/or damage through re
or electric shock or other electricity-related hazards.
15. Safety Check
Upon completion of any service or repairs to this product, ask the dealer/
distributor to perform safety checks to determine that the amplier is in proper
operating condition.
Recommendations on how to carry out the safety test can be found in DIN VDE
0701-1 “Maintenance, Modication and Test of Electronic Appliances“.

EC DECLARATION OF CONFORMITY
USER MANUAL
TECTON POWER AMP SERIES
P.4 USER MANUAL
TECTON POWER AMP SERIES P.5
EC Declaration of Conformity in accordance to EC Directives:
electro-magnetic compatibility (Council Directive 89/336/EEC,
as amended by Directives 92/31/EEC and 93/68/EEC);
low-voltage electrical equipment (Council Directive 73/23/EEC )
Manufacturers Name:
CAMCO Produktions- und Vertriebs- GmbH
für Beschallungs- und Beleuchtungsanlagen
Manufacturers Address:
Fischpicke 5, 57482 Wenden – Germany
Declares that the product with the model name:
CAMCO Power amplier TECTON-38.4, 32.4, 24.4, 28.2, 22.2 and 14.2
Conforms to the following standards:
EN60065 Security
EN55103-1 Emission
EN55103-2 Immunity
The operating conditions and application environments presupposed in the
information for use (user manual) are to be kept accordingly.
Please Note: The following formulations have been chosen: TECTON-38.4,
TECTON-32.4, TECTON-24.4, TECTON-28.2, TECTON-22.2 and TECTON-14.2
for the type plate and the EC Declaration of Conformity. TECTON 38.4, TECTON
32.4, TECTON 24.4, TECTON 28.2, TECTON 22.2 and TECTON 14.2 for the front
face of the appliance and for the text in the user manual.
Wenden, 09.12.2004
Joachim Stöcker

CONTENTS
USER MANUAL
TECTON POWER AMP SERIES
P.6 USER MANUAL
TECTON POWER AMP SERIES P.7
IMPORTANT SAFETY INSTRUCTIONS
EXPLANATION OF SYMBOLS / SAFETY
EC DECLARATION OF CONFORMITY
CONTENTS
1 WELCOME
1.1 Welcome to CAMCO
1.2 Unpacking
1.3 The Amplier
2 FACILITIES
2.1 TECTON – The Front
2.2 TECTON – The Rear
2.3 Factory Settings
3 INSTALLATION
3.1 Mains Supply
3.2 On/Off Switch
3.3 Mounting
3.4 Cooling
3.5 Ground Lift
3.6 Mode Indicators
3.7 Mode Selector
3.8 Wiring
3.8.1 E.U.I.2 and XLR Connection
3.8.2 Stereo Operation
3.8.3 Parallel-Mono Operation
3.8.4 Mono-Bridge Operation
3.8.5 SPEAKON Connection
4 OPERATION
4.1 Controls
4.1.1 Volume Control
4.1.2 Gain Selector
4.1.3 Gain and Input Sensitivity
4.1.4 Limiter Switch
4.1.5 HPF-Filter
4.2 Indicators
4.2.1 Output Current LEDs
4.2.2 Signal LEDs
4.2.3 Clip LEDs
4.3 Power Amp Protection Systems
4.3.1 Clip Limiter
4.3.2 SOA Protection
4.3.3 DC Protection
4.3.4 DC Servo
4.3.5 Over Current Protection
4.3.6 Thermal Protection
4.4 Mains Protections
4.4.1 Inrush Current Limitation
4.4.2 Mains Over Voltage Detection
4.4.3 Mains Failure Detection
4.4.4 Fuse Protection
4.5 Main SMPS Protections
4.5.1 Over Current Protection
4.6 Fans
5 OPTIONS
5.1 E.U.I.2 (Extended User Interface)
5.1.1 What Are The Possibilities
Using the E.U.I.2
6 TROUBLESHOOTING
6.1 Problem: No Sound
6.2 Problem: No Channel Separation
6.3 Problem: Distorted Sound
6.4 Problem: Hiss
6.5 Problem: Squeals and Feedback
7 SPECIFICATION
8 MEASUREMENTS
9 WARRANTY INFORMATION
9.1 Summary Of Warranty
9.2 Items Excluded From This Warranty
9.3 What CAMCO Will Do
9.4 How To Obtain Warranty Service
9.5 CAMCO’s Product Improvement
10 SERVICE INFORMATION
11 MAINTENANCE INFORMATION
12 DECOMISSIONING
COMPANY INFORMATION
P.2
P.3
P.5
P.6
P.7
P.8
P.9
P.10
P.11
P.12
P.13
P.14
P.15
P.16
P.17
P.18
P.19
P.20
P.21
P.22
P.23
P.26
P.31
P.32
P.33
P.34

1 WELCOME
USER MANUAL
TECTON POWER AMP SERIES
P.6 USER MANUAL
TECTON POWER AMP SERIES P.7
1.1 Welcome to CAMCO
Established in 1983, CAMCO has gained worldwide experience with professional
sound reinforcement technology. Within the audio market, CAMCO specialises
in the production and marketing of high quality power ampliers and sound
systems for use both on tour and in static installations.
The success of the LA, DL, DX and VORTEX series of power amps has made the
CAMCO name synonymous with professional quality, high performance and
utterly reliable power amps.
CAMCO’s commitment to research and development, seen not just in the area
of materials and technology but also most importantly in its highly skilled and
motivated workforce, is one of the keys to its ongoing success.
Welcome to the new world of professional power ampliers –
WELCOME TO CAMCO!
1.2 Unpacking
Please unpack and inspect your new amplier for any damage that may have
occurred during transit. If damage is found, notify the transportation company
immediately. Only you, the consignee, may initiate a claim for shipping damage.
CAMCO will be happy to cooperate fully as needed. Please save the shipping
carton as evidence of damage for the shipper’s inspection.
Even if the amplier has arrived in perfect condition, save all packing materials
so you will have them if you ever need to transport the unit.
NEVER SHIP THE AMPLIFIER WITHOUT THE ORIGINAL
PACKING MATERIALS.
When shipping the TECTON amplier, always use the original shipping carton
and packing materials. For maximum protection, repack the unit as it was origi-
nally packed at the factory.

1 WELCOME
USER MANUAL
TECTON POWER AMP SERIES
P.8 USER MANUAL
TECTON POWER AMP SERIES P.9
1.3 The Amplier
The TECTON is a Class-H power amplier with a power output of:
TECTON 38.4 1900 W per channel @ 4 Ω
3800 W in Mono-Bridge @ 8 Ω
3800 W in Parallel-Mono @ 2 Ω
TECTON 32.4 1600 W per channel @ 4 Ω
3200 W in Mono-Bridge @ 8 Ω
3200 W in Parallel-Mono @ 2 Ω
TECTON 24.4 1200 W per channel @ 4 Ω
2400 W in Mono-Bridge @ 8 Ω
2400 W in Parallel-Mono @ 2 Ω
TECTON 28.2 1420 W per channel @ 2 Ω
2840 W in Mono-Bridge @ 4 Ω
2840 W in Parallel-Mono @ 1 Ω
TECTON 22.2 1140 W per channel @ 2 Ω
2280 W in Mono-Bridge @ 4 Ω
2280 W in Parallel-Mono @ 1 Ω
TECTON 14.2 730 W per channel @ 2 Ω
1460 W in Mono-Bridge @ 4 Ω
1460 W in Parallel-Mono @ 1 Ω
TECTON ampliers are tted with Switched Mode Power Supplies (SMPS), which
signicantly reduces the weight and size (only 2U) of the amplier. Using SMPS,
the 2 symmetrical supply voltages (1 symmetrical supply voltage for TECTON
22.2 and TECTON 14.2) of the power amplier are more stable than the power
supplies used in conventional ampliers.
The TECTON has been designed as an intelligent and powerful product for
performing specialised tasks within a complex audio system. Users can adapt
the power amp to meet their specic audio requirements before use. Controls
mounted on the front and the rear of the TECTON allow access to the functio-
nality.
Since some of the externally mounted controls have multiple functions, it is
important that users should familiarise themselves thoroughly with the entire
range of controls.
If you have any questions regarding features and/or functions of your TECTON,
CAMCO will be pleased to provide you with further information. Alternatively,
contact your dealer or distributor.

13
19 2017 18
1415121110
89
16
23
OUTPUT B OUTPUT A
2221
1324
5 76
2 FACILITIES
USER MANUAL
TECTON POWER AMP SERIES
P.8 USER MANUAL
TECTON POWER AMP SERIES P.9
2.1 TECTON – The Front
1 On/Off Switch
2 Volume Control – Channel A
3 Volume Control – Channel B
4 Operating Mode LEDs (multifunctional)
5 Clip LEDs
6 Output Current LEDs
7 Signal LEDs (multifunctional)
2.2 TECTON – The Rear
8 AC Power Cable
9 Cooling Air Outlet Vents
10 Input Ground Lift Switch
11 High Pass Filter B
12 Mode Selector
13 Clip Limiter Switch
14 High Pass Filter A
15 Gain Selector
16 Extended User Interface
(E.U.I. 2)
17 XLR – Line Input B
18 XLR – Line Input A
19 XLR – Line Link B
20 XLR – Line Link A
21 SPEAKON Outlet B
22 SPEAKON Outlet A
23 Rating Plate

13
19 20
17 18
14
15
12
11
10
16
2 FACILITIES
USER MANUAL
TECTON POWER AMP SERIES
P.10 USER MANUAL
TECTON POWER AMP SERIES P.11
2.3 Factory Settings
TECTON ampliers are delivered with the following factory settings
Front panel:
On/Off Switch Off Amplier is switched off
Rear panel:
10 Input Ground Lift Grounded
11 High Pass Filter channel B Off
12 Mode Selector Stereo
13 Limiter Off
14 High Pass Filter channel A Off
15 Gain Selector 26 dB
Make sure that the switches are set to the conguration needed for each par-
ticular application. For more detailed information, see sections 3.5, 3.7 and 4.1.

TECTON-22.2
230 V~ 50/60 Hz 10,6 A 1120 W
1100 W / 2 Ohm
xxxxxxx
TECTON-24.4
230 V~ 50/60 Hz 10,5 A 1060 W
1600 W / 2,7 Ohm
xxxxxxx
TECTON-28.2
230 V~ 50/60 Hz 9,5 A 1002 W
1400 W / 2 Ohm
xxxxxxx
TECTON-32.4
230 V~ 50/60 Hz 9,8 A 1010 W
1600 W / 4 Ohm
xxxxxxx
TECTON-14.2
230 V~ 50/60 Hz 7,4 A 712 W
700 W / 2 Ohm
xxxxxxx
TECTON-38.4
230 V~ 50/60 Hz 11,3 A 1220 W
1900 W / 4 Ohm
xxxxxxx
3 INSTALLATION
USER MANUAL
TECTON POWER AMP SERIES
P.10 USER MANUAL
TECTON POWER AMP SERIES P.11
3.1 Mains Supply
When mounting or connecting the amp always disconnect it from mains.
Only connect the TECTON amplier to a appropriate AC circuit and outlet,
according to the requirements indicated in the second line on the rating
plate.
Exemplary rating plates for a mains supply of 230 V AC 50/60 Hz.
Power supply data:
Voltage Mains Frequency Current Power Consumtion
TECTON-38.4 120 V 50/60 Hz 22,6 A 1220 W
TECTON-38.4 220 V 60 Hz 11,3 A 1220 W
TECTON-32.4 120 V 50/60 Hz 19,6 A 1010 W
TECTON-32.4 220 V 60 Hz 9,8 A 1010 W
TECTON-28.2 120 V 50/60 Hz 19 A 1002 W
TECTON-28.2 220 V 60 Hz 9,5 A 1002W
TECTON-24.4 120 V 50/60 Hz 21 A 1060 W
TECTON-24.4 220 V 60 Hz 10,5 A 1060 W
TECTON-22.2 120 V 50/60 Hz 21 A 1120W
TECTON-22.2 220 V 60 Hz 10,6 A 1120 W
TECTON-14.2 120 V 50/60 Hz 14,8 A 712 W
TECTON-14.2 220 V 60 Hz 7,4 A 712 W
NOTE: Even under normal conditions the mains current can reach levels
up to 60 A (230 V) and 120 A (120 V), respectively; this could cause lamps
to icker if connected to the same mains as the amp. The impedance of
the AC circuit should be less than 0,157 Ohms to avoid icker according
to EN61000-3-11 “Electromagnetic compatibility – Part 3-11: Limits
– Limitation of voltage changes, voltage uctuations and icker in the
public low-voltage supply systems – Equipment with rated current more
than 75 A and subject to conditional connection”. If in any doubt, consult
your local power provider. Never attempt to measure this impedance level
with your ohmmeter. This may damage your meter and expose you to the
risk of electric shock!

442 mm
330,7 mm
356,2 mm
347,2 mm
7 mm 76,2 mm
10 mm
466 mm
7 mm
10 mm
88,9 mm
76,2 mm
3 INSTALLATION
USER MANUAL
TECTON POWER AMP SERIES
P.12 USER MANUAL
TECTON POWER AMP SERIES P.13
3.2. On/Off Switch
The On/Off Switch is a rocker-type switch. It is located on the right side of the
front panel.
To turn the amplier on, push in on the upper part of the switch. This initiates
start-up by activating the inrush current limiter.
During power up the Clip and Signal LEDs from both channels will light up in
red for a few seconds.
To turn the amplier off, push in on the lower part of the switch.
Amplier is switched on Amplier is switched off
NOTE: This switch does NOT disconnect the amplier from mains.
Make sure the mains power socket or an alternative disconnect device is
near by and easily accessible.
The switch initiates start-up by activating the current limiting function.
As soon as the power amplier is connected to the mains power supply, a vol-
tage is supplied to both the line-lter and the fused input of the controllable
rectier. Disconnecting the amplier from the main power supply can only be
achieved by physically separating the amplier from the mains by pulling the
mains plug. The mains plug therefore has to be freely accessible. Disconnect
the mains plug from the mains during a lightning storm or when the amplier
remains unused or unsupervised for a prolonged period of time. Alternatively,
you can disconnect the amplier via an external all-pole disconnection from
the mains.
If a power cut occurs while the amplier is switched on, it will restart automati-
cally once the power supply has been restored. All settings operation prior to
the loss of power will be maintained.
3.3 Mounting
Use four screws and washers when mounting the amplier to the front rack rails.
For mobile use, the amplier should also be secured using the 19” mounting
elements on the rear panel.

DO NOT REMOVE MAINS CONNECTOR GROUND
IT IS ILLEGAL AND DANGEROUS
Lift Position Ground Position
to Pin 1
of the XLRs
3 INSTALLATION
USER MANUAL
TECTON POWER AMP SERIES
P.12 USER MANUAL
TECTON POWER AMP SERIES P.13
3.4 Cooling
Under normal operation of the power amp, overheating should never be a
problem. The air is taken in from the front and out through the back, it is of
course essential that while the power amp is running air is able to circulate
around it freely.
The efciency of the cooling will depend on the immediate environment (e.g.
an enclosed rack, direct sunlight). If the amp is installed in a case, the open area
at the back of the case must be at least 140 cm². This area should be in line with
the amp.
If this can not be achieved a forced ventilation system has to be used.
3.5 Ground Lift
The input signal ground (pin 1 for all 4 XLRs) is connected to the ground of the
mains supply. In order to avoid ground loops, this connection can be separated
via a resistor. The ground potential of the power amp and the ground of the
loudspeaker always remain connected to the ground of the mains supply
regardless of the setting of this switch.
Removing or taping the mains connector ground is illegal and dangerous.
3.6 Mode Indicators
On the front panel there are two yellow LEDs to indicate the mode that is set. In
stereo mode (2-channel) none of them will be lit. In Parallel-Mono the (PM) LED
will be lit and in Mono-Bridge, the (MB) LED will be lit.
Amplier in Parallel-Mono mode Amplier in Mono-Bridge mode

Input
Ground
Lift
Input Ground Lift in position:
grounded
LINK BInput
Channel B
3
12 2
3
11
3
2 2
3
1
To
Channel B
To
Channel A
Input
Channel A
LINK A
3 INSTALLATION
USER MANUAL
TECTON POWER AMP SERIES
P.14 USER MANUAL
TECTON POWER AMP SERIES P.15
3.7 Mode Selector
The switch on the rear panel changes the operating mode. Switch the power
switch to the Off position to make changes on the Mode Selector. When the
amplier is switched on again, the selected mode will operate.
3.8 Wiring
3.8.1 E.U.I. and XLR Connection
XLR: Pin 1 = Ground (or lifted via 15 Ω resistor) (See 3.5 Ground Lift)
Pin 2 = Hot (inphase)
Pin 3 = Cold (out of phase)
Always use symmetrical (balanced) shielded cable to connect the amplier.

TECTON
A Z ≥ 2 *Zmin
TECTON
A
Zres ≥ 0.5 *Zmin
TECTON
A (L)
B (R)
Z ≥ *Zmin
Z ≥ *Zmin
3 INSTALLATION
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TECTON POWER AMP SERIES
P.14 USER MANUAL
TECTON POWER AMP SERIES P.15
3.8.2 Stereo Operation, 2 Channel Operation
Two fully independent amplier channels (normal operating mode).
3.8.3 Parallel-Mono Operation
Parallel operation of the two channels together.
The output terminals of the two channels are congured in parallel using an in-
ternal relay. The (single) load is connected either to the output of channel A or to
that of channel B (as if in stereo). While the total output of the amplier remains
the same and the output voltage level is also the same as in stereo operation,
the minimum impedance that can be connected is reduced by half due to the
fact that current capability is doubled. Only channel A-Input is active. The chan-
nel B-Input is inactive – turn the volume of channel B down to zero.
This mode is useful when, for example, 3 identical loudspeakers are to be
operated with the same power.
3.8.3 Mono-Bridge Operation
One-channel mono bridged operation.
The second channel processes the same input signal, but with reversed phase.
The (single) load is connected between the two positive channel outputs using
a suitable connected SPEAKON connector. While the total output of the ampli-
er remains the same, both the available output voltage and the minimum
impedance that can be connected are doubled, as compared with stereo ope-
ration. Only channel A-Input is active. A signal feeding channel B will have no
effect on the output. Turn the volume of channel B down to zero.
WARNING !
In Mono-Bridge mode RMS output voltages are as high as 230 V. Wiring
to the speaker loads must conform to NEC Class 3 safety standards or its
aquivalent that meets all national and local electric codes.
All customer specic cables may only be manufactured by qualied
suppliers/personnel. All cabling or rewiring work must be carried out by
qualied personnel.
* Zmin = 2 Ω for TECTON 28.2, 22.2 and 14.2
* Zmin = 4 Ω for TECTON 38.4, 32.4 and 24.4

Output B
Output A
Input
Channel A
Input
Channel B
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3.8.5 SPEAKON Connection
Both SPEAKON connectors are connected to channel A and channel B outputs.
The pin conguration of the SPEAKON connectors is as follows:
Output A: Pin 1+ Channel A signal
(View at the back) Pin 1- Channel A ground
Pin 2+ Channel B signal
Pin 2- Channel B ground
Output B: Pin 1+ Channel B signal
(View at the back) Pin 1- Channel B ground
Pin 2+ Channel A signal
Pin 2- Channel A ground
WARNING !
SPEAKON connectors marked with the lightning ash indicate high vol-
tages that are potentially life threatening.
Wiring to these terminals requires installation by an instructed person or
the use of ready-made leads or cords.
Custom wiring should only be made by qualied personnel.
To prevent electric shock, do not operate the amplier with any of the con-
ductor portion of the speaker wire exposed.
NOTE:
For reasons of safety and performance, use only high-quality fully insu-
lated speaker cables of stranded copper wire. Use the largest wire size that
is economically and physically practical, and make sure the cables are no
longer than necessary.
IMPORTANT:
When connecting speaker cabinets in parallel, always use all the contacts
in both SPEAKON connectors. If not, this may cause permanent damage to
the connectors and considerably reduce performance.

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4.1 Controls
4.1.1 Volume Control
A volume control with 41 notched settings controls the audio signal. These
settings have been selected to correspond to human hearing characteristics
(logarithmically) and therefore guarantee an optimal range of settings for prac-
tical applications. Each channel can be set individually except when operating
in mono modes whereby only channel A is active.
Set the volume to zero before turning on the amplier to prevent the occur-
rence of sudden high volume levels which may cause damage to your hearing
and/or the speakers.
4.1.2 Gain Selector
A switch on the rear of the TECTON allows the maximum amplication attain-
able to be set directly in the input stage.
The TECTON amplier has a 26 dB and 32 dB
voltage gain setting along with a 1,4 V sensitivity
setting.
4.1.3 Gain and Input Sensitivity
The table shows input sensitivity per channel for a given gain and load. It also
shows the gain for the 1,4 V input sensitivty.
Model 26 dB 32 dB 1,4 V
38.4 4 Ω @1900 W
8 Ω @ 1100 W
4,37 V
4,70 V
2,19 V
2,36 V 36,52 dB
32.4 4 Ω @ 1600 W
8 Ω @ 915 W
4,01 V
4,29 V
2,01 V
2,15 V 35,72 dB
24.4 4 Ω @ 1200 W
8 Ω @ 700 W
3,47 V
3,75 V
1,74 V
1,88 V 34,56 dB
28.2 2 Ω @ 1420 W
4 Ω @ 920 W
2,67 V
3,04 V
1,34 V
1,52 V 32,74 dB
22.2 2 Ω @ 1140 W
4 Ω @ 660 W
2,39 V
2,58 V
1,20 V
1,29 V 31,29 dB
14.2 2 Ω @ 730 W
4 Ω @ 420 W
1,92 V
2,05 V
0,96 V
1,03 V 29,33 dB
4.1.4 Limiter Switch
This switch is located at the rear of TECTON. It allows you to set the mode of the
limiter. There are three modes. (See 4.3.1 Clip Limiter)
Right position: Middle position: Left position:
Clip Limiter: Fast Clip Limiter: Slow Clip Limiter: Off
Attack fast Attack slow

HPF OFF
HPF 30 Hz
HPF 50 Hz
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4.1.5 HPF Filter
(Channel A as example)
Left position: Middle position: Right position:
HPF: Off HPF: 30 Hz HPF: 50 Hz
Low frequency response curves
4.2 Indicators
4.2.1 Output Current LEDs
The brightness is proportional to the output current in the channel. Output
current of approx. 1 A lights up the LED at its lowest brightness level, while full
brightness corresponds to the maximum rated current.
4.2.2 Signal LEDs (multifunctional)
The channels Signal LED is illuminated green when the voltage level at the
output reaches approx. 4 V; this corresponds to a power of approx. 4 W at an
impedance of 4 Ohms. The channels Signal LED is illuminated red while the Amp
is in Protect Mode (Mute).

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4.2.3 Clip LEDs
If the power level is overloaded, the Clip LED will light up.
4.3 Power Amp Protection Systems
4.3.1 Clip Limiter
If the power amp is overdriven, the clip detection triggers the Attack-Release-
Circuit (ARC). The ARC delivers the control voltage for the gain reduction. Two
different attack modes (fast and slow) could be chosen with the Clip Limiter
switch (see 4.1.4 Limter Switch).
4.3.2 SOA Protection
Whenever the power transistors leave their Safe Operation Area (SOA), the
SOA-protection in stereo mode switches back the current rail of the respective
channel. In mono modes the rails of both channels are switched back.
4.3.3 DC Protection
Each output of the power amp is constantly monitored for persistent DC voltage
levels. If the 3 V thresholds are exceeded at any of the outputs, the correspond-
ing channel will be muted. If DC was only applied for a short moment, the ampli-
er will realase mute and work as normal. If DC is applied for longer periodes or
several short times the amplier will switch to stand by mode.
Switch off the amplier, wait until the power LED stops ashing and switch the
amplier on again.
4.3.4 DC Servo
To prevent DC Offset at the speaker output the TECTON is tted with a DC
Servo.
4.3.5 Over Current Protection
Over current is permanently controlled in the output stage. There are two limit-
ing levels of over current depending on output voltage. These limits will be set
automatically. This improves reliability without degrading sound quality when
driving complex loads.
4.3.6 Thermal Protection
There are several sensors in the amp in order to ascertain temperature data. If
a temperature of more than 85 °C is detected at the heat sinks, the input signal
on that channel is reduced. If the temperature exceeds 100 °C, the main SMPS
is switched off.