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The Rear Panel:
17 18 19 20 222116 2423
16. AC LINE IN: Firmly insert the female
end of the supplied AC power cord into this
socket. The grounded power cord should
only be plugged into a grounded power
outlet that meets all applicable electrical
codes and is compatible with the voltage,
power, and frequency requirements stated
on the rear panel. Do not attempt to
defeat the safety ground connection.
17. CIRCUIT BREAKER: The circuit
breaker protects the unit from damage
caused by excessive current demands. If
the amplifier stops working, check the cir-
cuit breaker. If it has opened, the button will
protrude showing a contrasting color.
Reset the circuit breaker by depressing it
until it latches. The breaker must cool down
for a short time before the button will latch.
If the circuit breaker opens repeatedly,
have the amplifier inspected by a qualified
service person.
18. EFFECTS SEND: When using an
external effect, connect this jack to the
effect’s input by means of a shielded signal
cable.
19. EFFECTS RETURN: When using an
external effect, connect the effect’s output
into this jack by means of a shielded signal
cable.
20. LINE OUT: Use this 1/4” jack to send a
post-EQ line level signal to an external
amplifier, mixing console or recording
equipment.
21. LEVEL: Use this control to adjust the
level of the signal at the Transformer Bal.
Line Out jack (#22).
22. TRANSFORMER BAL. LINE OUT:
Use this XLR jack to send a line level sig-
nal to an external amplifier, mixing console
or recording equipment. The signal at this
jack may be pre or post-EQ, depending on
the setting of the Pre/Post switch (#23).
23. PRE/POST: This switch determines
whether the signal at the Transformer Bal.
Line Out jack (#22) is pre-EQ (switch out) or
post-EQ (switch depressed).
24. LIFT/GND: This switch, when de-
pressed, isolates the chassis from the
ground pin of the Transformer Bal. Line Out
jack (#22) . This may reduce residual hum
and buzz which is sometimes picked up by
line out signal cables.
PBC228
PortaBass Amplifier