Ampeg PF-350 - Manual (Page 7)

PF-350 / PF-500 / PF-800 Bass Guitar Amplifier
7
14. IEC POWER INPUT CONNECTOR: This
is where you connect the supplied AC
power cord.
Before plugging in the power cord, make
sure that the voltage selector switch
[15] is set to the same voltage as your
local AC mains.
15. VOLTAGE SELECTOR SWITCH:
Make sure the switch is in the correct
position for your local AC mains voltage
before you plug in the AC power cord.
Use a small flat screwdriver to slide the
switch if required.
16. POWER SWITCH: Use this switch to
turn the overall system power on or off.
Press the switch to the left to turn on
the power. Press the switch to the right
to put the amp into standby mode. It will
not function, but the circuits are still live.
To remove AC power, either turn off the
AC mains supply, or unplug the power
cord from the amplifier and the AC
mains supply.
17. VENTILATION: Make sure that the
ventilation openings are not obscured in
any way. This will allow the flow of
cooling air to the power
amplifier’s heatsinks. See “Fault/Thermal
Considerations” on page 18 for more
information.
18. SPEAKER OUTPUTS: These 1/4" TS
output jacks supply speaker-level power
to the speaker cabinet. The rated power
output is 250 watts rms into 8 ohms or
350 watts rms into 4 ohms.
The two identical outputs are wired in
parallel, and you can use either one, or
use both. Make sure the total speaker
impedance load is 4 ohms or greater.
For example, you could connect:
Two 16 ohm speakers (an 8 ohm load),
Two 8 ohm speakers (a 4 ohm load)
or one 4 ohm speaker.
Use speaker cables with 1/4" TS ends
to make the connections. Do not use
instrument cables as they may overheat.
19. XLR LINE OUT JACK: Typically, you
would connect this balanced output to
the balanced input of an external mixer,
or a recorder. In this way, you do not
have to mic the speaker cabinet in order
to add it to the main mix, or to record.
The output is not affected by the volume
control [8].
This output can connect to external
power amplifiers, or powered
loudspeakers, as long as they have their
own input controls to adjust the volume
level.
Balanced connections allow long cable
runs to be used, as hum and noise
pickup in the line is minimized.
14 15 16 17 18 18 19 20 21
250W rms @8
350W rms @4
speaker outputs XLR line out fx loop
return
send
power
PF 350
PF-350 Rear Panel