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6. Channel 1 SIGNAL indicator
Green LED illuminates to indicate the presence of the signal at the amplifier channel 1 output.
7. Channel 2 SIGNAL indicator
Green LED illuminates to indicate the presence of the signal at the amplifier channel 2 output.
8. Channel 1 LIMIT indicator
Red LED illuminates when the channel's output is limited. When this LED flashes reduce the signal level of channel 1.
9. Channel 2 LIMIT indicator
Red LED illuminates when the channel's output is limited. When this LED flashes reduce the signal level of channel 2.
10. Channel 1 PROTECT indicator
Red LED illuminates when the channel 1 is in protect mode for one of the following reasons:
• There is a short circuit at the amplifier output wires.
• The amplifier output stages are faulty.
• VHF protection trips (self-excitation or long time feedback).
Consequently the channel is muted until the reason of fault is removed.
11. Channel 2 PROTECT indicator
Red LED illuminates when the channel 2 is in protect mode.
12. TEMP indicators
Yellow LED illuminates when the correspondent channel is in protect mode due to the fact that the heatsink reaches a
temperature above the normal working limit. Consequently the channel is muted until the temperature reaches again
normal levels.
REAR PANEL (FIG.5)
13. Fan cooling vent
Air cooling vent: always keep it clear from cables or other objects.
14. AC~ cord
This is the amplifier mains supply cord. Connect the power cord to an electrical outlet complying with the power supply
specifications indicated on the apparatus. Be sure your amplifier is turned off before you plug the mains supply cord into
an electrical outlet.
15. MAINS circuit breaker
The circuit breaker is used for the protection of the amplifier when over-current or short circuit occur. If the breaker reset
button is down this means that it is open. After troubleshooting, raise up the reset button to restore the power supply. If
a trip occurs again or the reset button doesn't stay up, please contact the nearest PROEL service center.
16. Specification Label
An adhesive label applied here shows the following information:
(1) Model Code
(2) Serial Numer of the apparatus
(3) Mains supply AC voltage requirements
(4) Maximum power supply consumption
17. Channel 1 XLR input
This is a XLR female connector, which accepts a XLR plug from almost any type of equipment with a balanced or
unbalanced line level outputs. The XLR input is wired as follows:
Pin 1 = shield or ground
Pin 2 = + positive or "hot"
Pin 3 = - negative or "cold"
This is the input of Channel 1 amplifier in STEREO mode, or the input of both channel amplifiers 1 and 2 in PARALLEL mode,
or the only input in BRIDGE mode.
NOTE: Whenever possible, use always balanced cables. Unbalanced lines may also be used but may result in noise over
long cable runs. In any case, avoid using a balanced cable for one channel and an unbalanced one for the other, or a
balanced cable for input and an unbalanced for link, as this would cause a considerable difference in channel levels and/
or noise.
18. Channel 2 XLR input
Same as above but for channel 2 input. It operates only in STEREO mode.
