Lab.gruppen fP 2200 - Manual (Page 13)

Channel A and B into two separate
Speakons
Channel A and B into one Speakon
(Stereo and Bi-amp) Bridge mono
Never connect either output terminal to ground or to some other output or input terminal.
For regular two-channel operation connect each speaker load across the output’s positive and negative
terminals. Pay attention to speaker polarity; loudspeakers connected out of polarity degrade sound
quality, and may be damaged as a consequence.
Keep the speaker cable leads as short as possible, and use a good quality stranded speaker cable. Do not
use shielded leads, such as microphone or guitar cable. Remember that the speaker cable robs the power
of the amplifiers in two ways: by increasing the load impedance, and by introducing resistive power
losses.
WARNING: To prevent from electrical shock, do not operate the amplifier with any
portion of the speaker wire’s conductor exposed.
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• Make sure that the power switch is set to “off” before connecting any input or output, or
operating the switches on the rear panel. See page 8 regarding installation.
• Make sure that the AC mains voltage is correct, and the same as the one printed on the rear
panel of the amplifier. See page 8 regarding operating voltage and power consumption.
• Make sure that the switches on the rear panel for operation modes, gain switch and clip limiter
switch are in the correct position. See page 7 regarding operation modes and page 13 regarding
clip limiters.
• It is always a good idea to turn down the gain controls during power-up to prevent from speaker
damage in case of a high signal being present at the input.
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When you power up the amplifier it takes a couple of seconds to check its circuits. This is known as the
"soft-start" or "slow-start" sequence. The fans first blow at high speed before going into "idle", and the
two bottom green LED’s illuminate to show that the amplifier is operational.
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The two input level attenuators on the front panel adjust the signal level for their respective amplifier
channel in all modes. They are calibrated in dB to assist the setup of active loudspeaker systems, or to cut
down unwanted noise from the input signal.
In bridge mode both controls must be in the same position, so that the speaker load will be shared equally
between the channels.
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