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CHAMP Series owner‘s manual © Zeck Audio 2000
K000001A01
2.3 Connection of inputs
All CHAMP series amplifiers have balanced 1⁄4“/XLR compound
receptacles for input connectors. Although these connectors
accept balanced and unbalanced wiring, we strongly
recommend the use of balanced microphone cables for the
best in sound quality and lowest possible noise interference.
The input connectors are wired following the lastest industry
standard (1/4“ terminals in brackets):
1 (sleeve) = ground
2 (tip) =
3 (ring) = signal -
2.4 Connection of speakers
Attention: All CHAMP series amplifiers are capable of
producing hazardous voltages on their speaker output
terminals.
To avoid overheating of the speaker cables, choose cables
with a cross-section of at least 2 × 1,5 mm
2
. Especially for longer
distances, we strongly recommend the use of heavy speaker
cables to keep losses at a minimum. Speakon plugs must be
twisted clockwise after insertion until they snap into contact
position.
Different settings of the MODE SWITCH (10) may require
different wiring of the speaker cables and plugs. Before
switching on the amplifier, always make sure that all speaker
connections are properly done in correspondence with the
instructions for your particular amplifier model in chapter 3.
3. Instructions for particular CHAMP
models
3.1 Two-channel models
CHAMP 2.250 / CHAMP 2.350 / CHAMP 2.500
3.1.1 Connection of inputs
In Stereo mode (switch (10) in “Stereo” position), each input
channel is connected to an output of the source device.
In
Parallel mode (switch (10) in “Parallel” position) and in
Bridge mode (switch (10) in “Bridged” position), the input
signal must only be connected to input 1.
3.1.2 Parallel outputs
Each input connector has a parallel-wired male output XLR
connector for linking of more power amplifiers.
3.1.3 Connection of speakers
Each channel is equipped with Speakon (4-pole) and binding
post speaker connectors.
In Stereo mode, the Speakon connectors are wired so that
the output signal of each channel appears at two poles of
the assigned connector. The signal of the other channel also
appears at one pole of the conenctor. This feature allows to
use 4-pole speaker cables that carry both channel signals for
a versatile and convenient speaker wiring. If you want to use
4-pole speaker cables, make sure that the speaker cabinet
connectors are wired accordingly.
In Parallel mode, both inputs of the amplifier are internally
wired in parallel. The two output signals (Signal 1 and Signal 2)
carry the same information but can be volume-adjusted
individually.
In Bridge mode there is only one input signal and only one
monaural output signal with the terminals and Signal -,
appearing at both outputs. The speaker must be connected
‘floating’, which means with no ground connection.
If the binding post connectors are used in Bridge mode, only
the red terminals must be used.
3.1.4 Volume controls
In Stereo mode, each channel can be level-adjusted with the
assigned volume control.
In
Parallel mode, both channels carry the same signal. Each
channel can be level-adjusted with the assigned volume
control.
In
Bridge mode, the level of the monaural output signal is
adjusted with the volume control of channel 1 (channel 2
volume control full clockwise).
Fig.6: Required Speakon plug wiring for 2-channel models in
Stereo mode
Fig.7: Required Speakon plug wiring for 2-channel models in
Parallel mode
2+
2-
1-
1+
2
Ground Ground
2+
2-
1-
1+
1
Signal
Channel 1
Signal
Channel 1
Signal
Channel 2
Signal
Channel 2
Signal
Channel 2
Signal
Channel 1
2+
2-
1-
1+
2
Ground Ground
2+
2-
1-
1+
1
Signal 2 Signal 2
Signal 1 Signal 2
Signal 1 Signal 1
2+
2-
1-
1+
2
Do not use!
Signal -
Signal -
2+
2-
1-
1+
1
Fig.8: Required Speakon plug wiring for 2-channel models in
Bridge mode
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