Camco Q-Power 10 User manual

Q-POWER SERIES USER MANUAL
USER MANUAL
Q-POWER SERIES
P. 1
Q-POWER
SERIES
INFORMATION FOR USE FOR MODELS
Q-POWER 6 and Q-POWER 10
QUM_GB_2008-R1_01-2008
©Copyright 2007 by CAMCO Produktions- und Vertriebs- GmbH
für Beschallungs- und Beleuchtungsanlagen
Fischpicke 5, D-57482 Wenden, Germany
Telephone [phone]
Q-POWER
SERIES

IMPORTANT SAFETY INSTRUCTIONS
USER MANUAL
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P. 2
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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 am-
plifier. The user manual forms an integral part of the amplifier. Reselling of the
amplifier is only possible if the user manual is available. Any changes made to
the amplifier have to be documented 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 amplifier 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 amplifier.
10) The amplifier may only be used in accordance with the information provided
in the user manual. Before and during the usage of the amplifier please ensure
that all recommendations, especially the safety recommendations as detailed in
the user manual, are adhered to.
The Q-POWER Amplifier is designed for the amplification of pulsed audio signals
and the amplifier should only be connected to speakers with an average impe-
dance as indicated.
11) Do not place this amplifier 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 amplifier can only be disconnected from the power supply by removing
the plug which must be freely accessible at all times. Unplug this amplifier
during lightning storms or when unused for long periods of time.
13) Refer all servicing to qualified 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 amplifier,
the amplifier has been exposed to rain or moisture,
the amplifier has been dropped or suffered damage in any other way,
the amplifier 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 PROTECTIVE EARTH CONDUCTOR.
EXPLANATION OF SYMBOLS / SAFETY
USER MANUAL
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P. 3
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1. Read the information for use (user manual)
When shipping the Q-POWER amplifier 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
Usethis amplifieronlyinE1,E2,E3,E4orE5environmentsaccordingtoEN55103-2
“Electromagnetic compatibility – Product family standard for audio, video and
audio-visual and entertainment lighting control apparatus for professional use
– Part 2: Immunity”
3.Ventilation
Slots and openings in the cabinet are provided for ventilation to ensure reli-
able operation of the amplifier and to protect it from overheating.These open-
ings must not be blocked or covered. This amplifier should not be installed
unless proper ventilation is provided or manufacturer’s instructions have been
adhered to.
4.Water and Moisture
Do not use this amplifier near water (for example in damp rooms or near a
swimming pool.
5. Cleaning
Unplug this amplifier 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
attention to cords and plugs and the point where they exit from the amplifier.

SAFETY
USER MANUAL
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7. Lightning
For added protection of this amplifier during lightning storms or when it is left
unattended and unused for long periods of time, unplug it from the wall out-
let. This will prevent damage to the amplifier 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 amplifier through openings as they may
touch dangerous voltage points or short out parts that could result in a fire or
electric shock. Never spill liquid of any kind on the amplifier.
9. Accessories
Do not place this amplifier on an unstable cart, stand, tripod, bracket or table.
The amplifier may fall,causing serious injury and serious damage to the product.
Any mounting of the amplifier should follow the manufacturers instructions and
should use a mounting accessory recommended by the manufacturer.
10. Connecting
When you connect the amplifier 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 amplifier to prevent
sudden high levels of noise which may cause hearing or speaker damage.
(See also section 4.2.1 Volume control)
12. Damages that require service
Unplug this amplifier 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 amplifier
if the amplifier does not operate normally as described in the user manual,
operate the controls only as described in the user manual
if the amplifier has been dropped or damaged in any other way
when the amplifier exhibits a distinct change from its normal function or
performance
13. Servicing
Do not attempt to service this amplifier yourself. As opening or removing covers
may expose you to dangerous voltage or other hazards, the amplifier may only
be opened by qualified 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 specified by the manufacturer. The use of un-
authorized replacement parts may result in injury and/or damage through fire
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 amplifier is in proper
operating condition.
Recommendations on how to carry out the safety test can be found in
DIN VDE 0701-1“Maintenance, Modification and Test of Electronic Appliances“.

EC DECLARATION OF CONFORMITY
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EC Declaration of Conformity in accordance to EC Directives:
electro-magnetic compatibility (Council Directive 2004/108/EC);
low-voltage electrical equipment (Council Directive 73/23/EEC )
Manufacturers Name:
CAMCO Produktions- und Vertriebs- GmbH
für Beschallungs- und Beleuchtungsanlagen
Manufacturers Address:
Fischpicke 5, D-57482 Wenden, Germany
Declares that the product with the model name:
CAMCO Power amplifier Q-POWER 6 and Q-POWER 10
Conforms to the following standards:
EN60065 Safety
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.
Wenden, 15.12.2007
Joachim Stöcker

CONTENTS
USER MANUAL
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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 Amplifier
2 FACILITIES
2.1 Q-POWER – The Front
2.2 Q-POWER – 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 Wiring
3.5.1 Input Connectors
3.5.2 Output Connectors
4 OPERATION
4.1 Indicators
4.1.1 On LEDs
4.1.2 Signal / Protect LEDs (multifunctional)
4.1.3 I-Out LEDs
4.1.4 Clip LEDs
4.2 Controls
4.2.1 Volume Control
4.2.2 Gain selector
4.2.3 Limiter Switch
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
4.5.2 Thermal Protection
4.6 Fans
4.7 Filter Cleaning
4.8 Mounting the Volume Control Security Cover
5 TROUBLESHOOTING
5.1 Problem: No Sound
5.2 Problem: Distorted Sound
5.3 Problem: Hiss
5.4 Problem: Squeals and Feedback
6 SPECIFICATIONS
7 MEASUREMENTS
8 WARRANTY INFORMATION
8.1 Summary Of Warranty
8.2 Items Excluded From This Warranty
8.3 What CAMCO Will Do
8.4 How To Obtain Warranty Service
8.5 CAMCO’s Product Improvement
9 SERVICE INFORMATION
10 MAINTENANCE INFORMATION / 11 DECOMISSIONING
COMPANY INFORMATION
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P. 3
P. 5
P. 6
P. 7
P. 8
P. 9
P. 10
P. 11
P. 12
P. 13
P. 15
P. 16
P. 17
P. 18
P. 19
P. 20
P. 22
P. 24
P. 27
P. 28
P. 29
P. 30

1 WELCOME
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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 amplifiers and sound
systems for use both on tour and in fixed installations.
The success of the LA, DL, DX, VORTEX and TECTON series of power amps has
made the CAMCO name synonymous with professional quality, high perform-
ance 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.
With its all-new Q-POWER amp series, CAMCO is pioneering a new dimension
in professional power amp construction. The seamless combination of ground-
breaking technology with proven safety elements is the hallmark of the new
series.
Welcome to the new world of professional power amplifiers –
WELCOME TO CAMCO!
1.2 Unpacking
Please unpack and inspect your new amplifier 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 amplifier 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 Q-POWER amplifier, always use the original shipping carton
and packing materials. For maximum protection, repack the unit as it was origi-
nally packed at the factory.

5 9 10
67 8 11
1234
12
1 WELCOME / 2 FACILITIES
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1.3 The Amplifier
The Q-POWER-series amplifiers offer a power output of:
Q-POWER 6 1,5 kW peak per channel @ 4 Ω,
using a Bipolar class H (2-step) high efficiency power ampli-
fier output stage
Q-POWER 10 2,5 kW peak per channel @ 4 Ω,
using a MOSFET class D high efficiency power amplifier output
stage
2 Facilities
The Q-POWER power amplifiers are both fitted with Switched Mode Power
Supplies (SMPS),which significantly reduces the weight and size (only 2U) of the
amplifier. Using SMPS, the symmetrical supply voltages of the power amplifier
are more stable than the power supplies used in conventional amplifiers.
2.1 Q-POWER – The Front
1 Clip LEDs
2 I-Out LEDs
3 Signal LEDs
4 On LEDs
5 Volume Control Channel A
6 Volume Control Channel B
7 Volume Control Channel C
8 Volume Control Channel D
9 Cooling Air Inlet Vents
10 Removable Air Filter System
11 On/Off Switch
12 Optional Volume Control Security Cover (included)

29
30
13 14 21 22 18
17
15
24
26 2728
16 19
20
23
25
MODEL:
OUTPUT PWR PER CH/IMP:
MADE IN GERMANY
SER. NO. :
Q-POWER 6
120 / 230 V ~ 50 / 60 Hz 1600 W
1000 W / 4 Ohm
45800
2 FACILITIES
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2.2 Q-POWER – The Rear
13 Rating Plate
14 Cooling Air Outlet Vents
15 SPEAKON Outlet Channel A/B
16 SPEAKON Outlet Channel C/D
17 Barrier Strip Outlets Channel A B C D
18 XLR Input Channel A
19 XLR Input Channel B
20 XLR Input Channel C
21 XLR Input Channel D
22 Gain Selector
23 Euroblock Input Channel A
24 Euroblock Input Channel B
25 Euroblock Input Channel C
26 Euroblock Input Channel D
27 Clip Limiter Switch Channel A/B
28 Clip Limiter Switch Channel C/D
29 Barrier Strip Security Cover
30 AC Power Cable

567 8 11
MODEL:
OUTPUT PWR PER CH/IMP:
MADE IN GERMANY
SER. NO. :
Q-POWER 6
120 / 230 V ~ 50 / 60 Hz 1600 W
1000 W / 4 Ohm
45800
21
2627
2 FACILITIES
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2.3 Factory settings
Q-POWER amplifiers are delivered with the following factory settings:
Front panel:
11 On/Off Switch Off The amplifier is switched off.
5 - 8 Volume Control Off The volume is set to minimum.
Rear panel
21 Gain Selector 32 dB
26 Clip Limiter Switch Channel A/B Off
27 Clip Limiter Switch Channel C/D Off
Make sure that the switches are set to the configuration needed for each
particular application.

MODEL:
OUTPUT PWR PER CH/IMP:
MADE IN GERMANY
SER. NO. :
Q-POWER 6
120 / 230 V ~ 50 / 60 Hz 1600 W
1000 W / 4 Ohm
45800
MODEL:
OUTPUT PWR PER CH/IMP:
MADE IN GERMANY
SER. NO. :
Q-POWER 10
120 / 230 V ~ 50 / 60 Hz 1500 W
1800 W / 4 Ohm
45800
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3.1 Mains supply
When mounting or connecting the amp always disconnect it from mains.
Only connect the Q-POWER amplifier to an 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 120 / 230 V ~ 50/60 Hz.
Power Supply Data:
Voltage Mains Frequency Current Power Consumption
Q-POWER 6 120 / 230 V 50 / 60 Hz 22 / 12 A 1600 W
Q-POWER 10 120 / 230 V 50 / 60 Hz 21 / 11 A 1500 W
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 amplifier 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 will light up in red for a few seconds. To turn the amplifier
off, push in on the lower part of the switch.
The amplifier is switched on. The amplifier is switched off.
NOTE: This switch does NOT disconnect the amplifier from mains.
The switch initiates start-up by activating the current limiting function. As soon
as the power amplifier is connected to the mains power supply, a voltage is
supplied to both the line-filter and the fused input of the controllable rectifier.
Disconnecting the amplifier from the main power supply can only be achieved
by physically separating the amplifier 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 amplifier remains unused
or un-supervised for a prolonged period of time. Alternatively, you can discon-
nect the amplifier via an external all-pole disconnection from the mains.
If a power cut occurs while the amplifier is switched on, it will restart auto-
matically once the power supply has been restored. All settings prior operation
to the loss of power will be maintained.

433,00 mm
421,00 mm
412,00 mm
465,00 mm
88,10 mm
76,20 mm
10,50 mm
7,00 mm
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3.3 Mounting
Use four screws and washers when mounting the amplifier to the front rack rails.
For mobile use, the amplifier should also be secured using the 19” mounting
elements on the rear panel.

Input B Input A
In C In A
132132132132
In BIn D
Input CInput D
+-+-+-+-
Input B Input A
In C In A
2
3
12
3
1 2
3
12
3
1
In BIn D
Input CInput D
+-
+-+-+-
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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 efficiency of the cooling will depend on the immediate environment (e. g.
an enclosed rack, direct sunlight) and on whether the front filter is clogged. 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 achived a forced ventilation system has to be used.
3.5 Wiring
3.5.1 Input Connectors
XLR: Pin 1 = Ground
Pin 2 = Hot (inphase, +)
Pin 3 = Cold (out of phase, -)
Euroblock connector: Pin 1 = Hot (inphase, +)
Pin 2 = Ground
Pin 3 = Cold (out of phase, -)
Make sure to always use high-quality symmetrical (balanced) shielded cable to
ensure maximum audio quality.
Take special care not to use the two XLR and Euroblock input connectors of a
specific channel at the same time. This could lead to volume and audio quality
loss and could damage the connected signal sources.
3.5.2 Output Connectors
The two SPEAKON connectors are connected to the channel A to D power ampli-
fier outputs. The pin configuration of the SPEAKON-connectors is as follows:
Top Right: Pin 1+ Channel A signal +
Pin 1- Channel A signal -
Pin 2+ Channel B signal +
Pin 2- Channel B signal -
Top Left: Pin 1+ Channel C signal +
Pin 1- Channel C signal -
Pin 2+ Channel D signal +
Pin 2- Channel D signal -

2+ 1+
2- 1- 2+ 1+
2- 1-
A
B
C
D
2+ 1+
2- 1- 2+ 1+
2- 1-
D C B A
-
+
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The pin configuration of the Barrier Strip connector is as follows:
Top row from left to right:
(all signal +) Channel D - Channel C - Channel B - Channel A
Bottom row from left to right:
(all signal -) Channel D - Channel C - Channel B - Channel A
The Q-POWER 6 and Q-POWER 10 amplifiers are optimised for a loudspeaker
impedance of 4 Ω. Attaching lower impedances might affect audio quality and
overall performance of the amplifier.
To connect any custom speaker cable wiring to the Barrier Strip connectors re-
move the security cover which is held by two screws. Take care to reinstall the
security cover after all connections are made, and be cautious to avoid short-cir-
cuits between the speaker wires and the security cover or chassis (for example
due to damaged or clamped cable isolations).
NOTE / IMPORTANT:
The Q-POWER 10 uses a bridged power amplifier output stage.This implies
that the amplifier outputs will not be referenced to ground. Please make
sure to always attach the loudspeakers between the signal + and the
signal - pins of the same channel on the SPEAKON or Barrier Strip connec-
tors.
Any damage to the loudspeaker or amplifier due to wrong cabling and/or
inter-channel short circuits will not be covered by warranty.
For reasons of safety and performance, only use high-quality fully insulated
speaker cables of stranded copper wire. Use the largest wire size that is eco-
nomically and physically practical and make sure that the cables are no longer
than necessary.
WARNING !
SPEAKON connectors marked with the lightning flashes 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 carried out by qualified personnel.
To prevent electric shock, do not operate the amplifier with any of the con-
ductor portion of the speaker wire exposed.

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4.1 Indicators
4.1.1 On LEDs
Under normal operation, after the amp has started, the green power LEDs are
permanently lit.
4.1.2 Signal / Protect LEDs (multifunctional)
The green Signal LEDs are illuminated when the voltage level at the output
reaches approx. 4 V; this corresponds to a power of approx. 4 W into a 4 Ohm
load.The channel signal LEDs are illuminated red when the amplifier is in Protect
Mode (Mute), for example because of persistent DC-voltage at the outputs or
overheating.
4.1.3 I-Out LEDs
The brightness is proportional to the output current in the channel. Output cur-
rent of approx. 1 A lights up the LED at its lowest brightness level, while full
brightness corresponds to the maximum rated current.
4.1.4 Clip LEDs
This LED indicates an overloading of the amplifier when the power output level
is to high.

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4.2 Controls
4.2.1 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
practical applications. Each channel can be set individually.
Set the volume to zero before turning on the amplifier to prevent the occur-
rence of sudden high volume levels which may cause damage to your hearing
and/or the speakers.
4.2.2 Gain Selector
A switch on the rear of the Q-POWER amplifiers allows the maximum amplifica-
tion attainable to be set directly in the input stage.
The Q-POWER amplifiers have a 26 dB and 32 dB
voltage gain setting along with a 1,4 V sensitivity
setting.
4.2.3 Limiter Switch
This switch is located at the rear of Q-POWER amplifiers.It allows you to activate
the clip limiter function on the channels A/B and C/D respectively.
4.3 Power Amp Protection Systems
4.3.1 Clip Limiter
If the power amp is overdriven and the limiter is set to on (see section 4.2.3)
the clip detection triggers the Attack-Release-Circuit (ARC). The ARC delivers
the control voltage for the gain reduction.
4.3.2 SOA Protection
Whenever the power transistors leave their Safe Operation Area (SOA),the SOA-
protection will either switch back the current rail of the respective channel
(Q-POWER 6) or limit the maximum load current in the power transistors
(Q-POWER 10).
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-
fier will release mute and work as normal. If DC is applied for longer periods or
several short times the amplifier will switch to standby mode.
If this happens, switch off the amplifier, wait until all indicator LEDs extinguish
and switch the amplifier on again.
4.3.4 DC Servo
To prevent DC Offset at the speaker output the Q-POWER amplifiers are fitted
with a DC Servo.
4.3.5 Over Current Protection
Over current is permanently controlled in the output stage. In case of exessive
loading the maximum output current of the amplifiers is automatically limited.
This improves reliability without degrading sound quality when driving com-
plex loads.
4.3.6 Thermal Protection
There are sensors in each amplifier heatsink 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 proportionally to prevent further heating of
the amplifier. If the temperature exceeds approximately 100 °C, the main SMPS
is switched off(safety shut-off).

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4.4 Mains Protections
4.4.1 Inrush Current Limitation
Within approximately 2 seconds of the Q-POWER Amplifier being switched on,
the inrush current limiter will increase mains current smoothly from nearly zero
to nominal value. This value depends on program material, output level and
speaker loads.
4.4.2 Mains Over Voltage Detection
Mains Over Voltage Detection is always operative. When the mains voltage
exceeds approx. 265 V (230 V operation) or 136 V (120 V operation), the ampli-
fier will switch off. When the mains voltage returns to nominal value a soft start
occurs.
4.4.3 Mains Failure Detection
Mains Failure Detection is always operative.When the mains supply is interrupt-
ed for about 2 mains cycles,the amplifier will switch off.When the mains voltage
returns to a normal value a soft start occurs.
4.4.4 Fuse Protection
The fuse protection circuit prevents amplifier shut-down (e.g. by a blown mains
fuse or a triggered circuit breaker) during extremely hard use with all channels
working at very high output power. Without intelligent mains current monitor-
ing and control this could easily happen as the rated output power is several
times higher than the capabilities of the standard mains supply.
In order to prevent any shutdown in extreme situations the amplitude of the
input signals will be reduced which will in return also reduce the mains current
draw.
4.5 Main SMPS Protections
4.5.1 Over Current Protection
The main SMPS (Switched Mode Power Supply) transformer current of your
Q-POWER Amplifier is continuously monitored. If over current occurs the main
SMPS immediately stops working.Should there be an internal failure this feature
prevents other parts from being damaged.
4.5.2 Thermal Protection
If the temperature of the main SMPS transformer exceeds 90 °C, the main SMPS
is switched off (safety shut-off).
4.6 Fans
The fans mounted in your Q-POWER Amplifier operate permanently, but as long
as the temperature remains below 40 °C, they run at their slowest speed and can
hardly be heard. The highest detected temperature from any amplifier channel
controls the speed of the fans.Above 40 °C the speed is increased until it reaches
its maximum value.

1
2
3
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Q-POWER Filter Assembly
1 Foam Filter
2 Front Frame
3 Screw
4.7 Filter Cleaning
The air intake on the front of your Q-POWER Amplifier is fitted with a removable
filter system. If the filter becomes clogged, the unit will not cool as efficiently as
it should and may result in reduced output levels.
WARNING: Turn off the amplifier before removing the front frame.
To clean or replace the filter just slightly unscrew the fixing screw (3) without
completely removing it from the front frame (it is held back by a small plas-
tic spacer on the back side of the frame to avoid loosing the screw). Then shift
the front frame slightly to the right. Then you should be able to remove the
frame from the amplifier completely (pull gently to avoid any bending of the
front frame).