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Operating your P7
P7 MULTICHANNEL POWER AMPLIFIER
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FRONT PANEL LAYOUT
The P7 front panel has a single control: a centrally located power on/off
button.
POWER
Switches the unit on and off. Note that the modules are turned on
individually to stagger the surge created when a powerful amplifier
is switched on (i.e., it provides a ‘soft start’). This reduces the surge
current drawn from the domestic power supply.
STATUS LEDS
A separate LED indicates the status of each of the seven channels of
the P7.
The LEDs cycle through red, orange, then green to indicate the status
from powered-up (initialised), stabilised and active respectively.
All LEDs are off in standby mode.
OPERATING PROCEDURE
Once the relevant connections have been made, the P7 can be
switched on using the central button on the front panel.
SWITCHING ON
It is recommended that you switch on your pre-amp or controller
before powering up the P7 power amp.
Normal powering up is indicated by the following sequence of front
panel LED indicators:
1. On pressing the power switch, all LEDs turn red.
2. After approximately half-a-second, the centre LED turns amber.
3. The LEDs continue turning amber from the centre to the edges
in pairs, with intervals of approximately one second.
4. The centre LED turns green and a relay ‘click’ is heard.
5. The LEDs continue turning green from the centre to the edges
in pairs, along with relay ‘clicks’, with intervals of approximately
one second.
If the LEDs do not follow this sequence when the P7 is powered up,
or behave abnormally at any time during use, then consult the table of
‘Fault status indicators’ on page 11 to discover why the amplifier is in
protection mode.
SWITCHING OFF
To shut down, switch the P7 power amp off first, followed by the pre-
amp or controller.
This eliminates the chance of any ‘thumps’ or power spikes being fed
through to the power amplifier and potentially causing damage to the
system.
NOTE: It is recommended that if the unit is switched off, then it
should not be switched on again for at least 20 seconds from when
it was turned off. This allows the amplifier’s power supply to discharge
fully before it is switched on again.