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CHAMP Series owner‘s manual © Zeck Audio 2000
K000001A01
Cooling fans
The fan outlets must never be covered.
7
8
Input connector
All input connectors are 1⁄4“/XLR compound recepta-
cles with balanced signal wiring. The pin configuration
is as follows:
XLR
1/4“
2
tip
Signal -
3
ring
Ground
1
sleeve
9
PARALLEL OUTPUT
(2-channel models only)
This balanced XLR output is parellel-wired to the input
connectors and can be used for linking of more power
amplifiers.
10
MODE Switch
This switch is used to switch the amplifier to STEREO,
PARALLEL or BRIDGE mode.
Attention: In BRIDGE mode, the speakers must be
connected only to the SIGNAL terminals with no
ground connection.
11
Binding post speaker terminals
The red speaker terminals always carry the output
signal, the black terminals are always connected to
ground. In BRIDGE mode, the speakers must be con-
nected only to the red terminals.
12
Speakon output connectors
The pin configurations of the Speakon connectors vary
between amplifier models and channels. See chapter
3 a detailed description of each model.
13
Automatic power circuit breaker
This automatic power circuit breaker becomes trig-
gered when the current intake of the amplifier exceeds
its upper allowed limit. The circuit breaker can be reset-
ted by pushing its button. If the reset fails, the ampli-
fier should be sent in for servicing.
14
Mains power input connector
15
Speakon connector for BRIDGE MODE
(CHAMP 4.250X only)
These Speakon output connectors are specially pro-
vided for speaker connection in BRIDGE MODE. These
connectors use only terminals 1+ and 1-.
17
Selector switch for crossover
(CHAMP 4.250X only)
In the left position of the switch, the crossover circuit
is bypassed for a linear frequency response of all
channels. The middle position activates the crossover
at the separation frequency that is printed on the
adjustment knob scale (60Hz to 250Hz). In the right
postion of the switch the value of the knob scale has
to be multiplied by 10 (600Hz to 2.5kHz).
Attention: When the crossover is activated, the MODE
switch (10) of channels 1+2 must be in its “Stereo“
position.
16
Control potentiometer for crossover frequency
(CHAMP 4.250X only)
This control is used to adjust the crossover frequency
between high- and lowpass of the internal 2-way
crossvers. The internal crossoverers are activated or
bypassed by means of the slide switch (17) below the
control potentiometer. When the crossover is activated,
channels 1 and 2 are assigned to the highpass filter,
channels 3 and 4 to the lowpass filter.
1.3 Models of the Champ series
The CHAMP series models are available in 5 versions:
Model
Nominal output power
into 4 ohms
into 8 ohms
Champ 2.250
2 × 250 W
2 × 150 W
Champ 2.350
2 × 350 W
2 × 220 W
Champ 2.500
2 × 500 W
2 × 330 W
Champ 4.125
4 × 125 W
4 × 80 W
Champ 4.250X
4 × 250 W
4 × 170 W
2. Instructions for all models
2.1 Placement of amplifier
The built-in cooling fans provide a steady front-to-rear flow of
cooling air inside the amplifier. When setting up the amplifier,
always care for sufficient clearance of the amplifier front and
rear to assure unhindered airflow. In addition, always observe
paragraphs 4, 5 and 6 of the safety instructions.
2.2 MODE SWITCH (10)
Before connecting the amplifier, use the MODE SWITCH of
the amplifier to switch the amplifier to its desired operational
mode. All CHAMP series amplifiers can be operated in 3 modes
which are described below. The 4-channel models (CHAMP
4.120 and CHAMP 4.250X) have two mode switches (channels
1/2 and 3/4).
STEREO
In this mode, all channels of the amplifier work independently.
This is the standard setting for two-channel or four-channel
operation. Attention: When the built-in crossover is activated
(CHAMP 4.250X only), the MODE switch (10) of channels 1+2
must be in “Stereo” position.
PARALLEL
In this mode, two inputs are wired in parallel. If only one input
is used, both outputs carry identical signals. The output levels
can be adjusted individually.
Caution:
In this mode, the inputs
of the channels are wired in parallel, not the outputs. Parallel-
wiring of amplifier outputs will inevitably lead to destruction
of the amplifier.
BRIDGE MODE
This mode provides considerably more output power by
linking two channels in monaural push-pull configuration
(see chapter 4 for available output power). This mode is
especially recommended for driving high-power subwoofer
cabinets that do not neccessarily require a stereo signal. In
addition to that, the BRIDGE mode can be used to directly
drive transformer-equipped speaker cabinets in a constant-
voltage network.
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