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16. POWER: Use this switch to turn the amplifier on and off. The switch illuminates when the amplifier is on.
17. ELECTRONIC TUNER (top panel, not shown): The electronic tuner is active whenever the amplifier is turned on,
providing constant, “real-time” tuning. The bottom row of LEDs indicate which note (string) is being tuned. The top row of
LEDs provides directional queues to facilitate quick and precise tuning of your instrument. The indicated note (string) is
properly tuned when only the center LED is illuminated.
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The Rear Panel:
18. AC LINE CORD (not shown): The grounded power cord should only be plugged into a grounded power out-
let that meets all applicable electrical codes and is compatible with the voltage, power, and frequency require-
ments stated on the rear panel. Do not attempt to defeat the safety ground connection.
19. EXTERNAL SPEAKER: Use this jack to connect the amplifier to an external speaker cabinet. This jack is
wired in series with the internal speaker, which remains active when this jack is used. A 4 ohm external speaker
cabinet is recommended.
20. EXPANDER ON/OFF MUTE FOOTSWITCH: Connect a two-button footswitch (such as the Crate CFS-2)
here for remote control of the Expander and the Mute function.
21. EFFECTS LOOP SEND: Use this jack to connect an external signal processor to the amplifier by means of
a shielded signal cable. Connect the other end of this cable to the input jack of the external processor.
22. EFFECTS LOOP RETURN: Use this jack to connect an external signal processor to the amplifier by means
of a shielded signal cable. Connect the other end of this cable to the output jack of the external processor.
23. BALANCED LINE OUT: Use this XLR jack to send a balanced line level signal to an external power amplifi-
er, mixing board, or recording console.
24. PRE/POST: Use this switch to determine whether the Balanced Line Out signal is Post-EQ (switch depressed)
or Pre-EQ (switch in the out position).
25. GROUND LIFT: This switch, when depressed, lifts the ground connection at the Balanced Line Out jack (#23).
This may help reduce hum in the Balanced Line Out signal.
26. VOLUME: Use this control to adjust the signal level at the Balanced Line Out jack (#23).
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BT1000 Bass Amplifier