Rear Panel (Fig.5) - Proel Technology HPX900 Manuel De L'utilisateur

signal is not attenuated in any way, so is fed to the amplifier channel at the same level at which it arrives on input).
7. Channel 1 SIGNAL indicator
Green LED illuminates to indicate the presence of the signal at the amplifier channel 1 output.
8. Channel 2 SIGNAL indicator
Green LED illuminates to indicate the presence of the signal at the amplifier channel 2 output.
9. 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.
10. 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.
11. Channel 1 PROTECT indicator
Red LED illuminates when the channel 1 is in protect mode for one of the following reasons:
• The heatsink reaches a temperature above the normal working limit.
• 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.
12. Channel 2 PROTECT indicator
Red LED illuminates when the channel 2 is in protect mode.
13. PARALLEL mode indicator
Yellow LED illuminates when both the channels are in PARALLEL mode.
14. BRIDGE mode indicator
Yellow LED illuminates when both the channels are in BRIDGE mode.
NOTE: When the amplifier operates in BRIDGE mode SIGNAL, LIMIT and PROTECT LED indicators illuminate
simultaneously, the signal is sent to both amplifiers from channel 1 input only and controlled by channel 1 level control
only.

REAR PANEL (FIG.5)

15. Fan cooling vent
Air cooling vent: always keep it clear from cables or other objects.
16. MAINS ~ 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.
17. FUSE holder
Here is placed the mains protection fuse.
Please follow the instructions on page 9 of this manual to replace it.
18. 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
(5) Mains Fuse Ratings
19. 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.
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