Pronomic MC4-600/MC6-400 power amplifier
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2. Power switch
Use this switch to turn the unit on or off. Turn the level controls to 0 before switching on. A
momentary mute is normal when the amplifier is switched on or off.
Attention: Always switch on the power amplifier after all other connected devices. Always
switch off the power amplifier before all other connected devices.
3. Level control
These controls adjust the level of each channel. Turn these knobs counterclockwise when
the clip LEDs are constantly lit, as this indicates that the input signal is toostrong.
4. Mains connection
Use this connector to supply power to the power amplifier.
5. Loudspeaker channel outputs
Use these Speakon compatible connectors to connect to external speakers.
6. Crossover switch
This switch allows you to select the filter type for each channel.
Off = No filters, full range signal is output.
HPF - High Pass Filter. Frequencies below the cut-off frequency (100 Hz) are cut off.
LPF - Low Pass Filter. Frequencies above the cut-off frequency (100 Hz) are cut off.
7. Mode selector switch
This switch on the back of the unit lets you choose between the three operating modes
"Stereo" and "Input Parallel" and "Bridge".
To do this, slide the switch to the appropriate position.
- Stereo mode: Both channels (e.g. channel 1 and 2) work independently.
- Input Parallel: The input signal from one channel pair (e.g. channel 1 and 2) is forwarded to
the other. If a signal is present at channel input 1, it is forwarded to channel input 2.
- Bridged mode (MC6-400 only): In this mode, the power of a pair of channels (e.g., channel
1 and 2) is combined to drive a single speaker. Therefore, make sure in advance that the
speaker, connections and cabling are suitable for this power, otherwise damage may occur.
ATTENTION: Note the minimum load of 8 Ωand the output power of 1200watts in this
mode.
8. Balanced channel inputs
These XLR jack combo jacks are balanced. Balanced connections are recommended
because they are less susceptible to signal interference. For longcable runs, an output
impedance of less than 600 ohms is required to avoid signal loss. For stereo operation, both
channel inputs of the channel pairs (e.g. channel 1 and 2) are used, while for bridged mono
operation only channel inputs 1, 3 and 5 are used.
