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KX-220 Stereo Keyboard Amplifier
The Rear Panel:
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23
22
21
24
20
15: Input Jacks (channel 1–3): Connection of an instrument,
drum machine, tape deck channel, microphone or other
high impedance (balanced or unbalanced) line level signal
with 1/4” plug can be made here. For stereo inputs use the
right/mono jack for the right channel input and the left jack
for the left channel input. For two mono inputs into one
channel, use the right/mono jack for one and the left jack for
the other. For a single mono input into one channel, use the
right/mono jack only.
16: Instrument Input Jack (channel 4): Connection of an instru-
ment (such as a bass guitar) can be made here.
17: Microphone Input Jack (channel 4): Connection of a low
impedance microphone can be made here. This XLR jack
carries +16 volts phantom power on pins 2 and 3.
18: Effects Loop: Connection of an external effects unit can be
made here. Plug a signal cable from the amplifier’s send jack
to the unit’s input jack. Plug another cable (or, for stereo
effects, a pair of cables) from the effect unit’s output jack(s) to
the amplifier’s return jack(s). (Mono effects connect into the
jack labeled right/mono.) The level of the effects can be con-
trolled by the channel rev/eff send controls (#3) and the
effects return control (#11).
19: Line Out Jacks: These pre-eq jacks allow connection to a
mixing board, recording unit, or house PA system. (These are
non-balanced output jacks.)
20: Preamp Out Jacks: These post-eq jacks allow connection to
an external power amp. When a plug is inserted into the left
preamp out jack, the amplifier’s left channel signal is inter-
rupted from its internal power amp and is routed only
through the jack. This allows you to achieve a true stereo
output if you connect your main KX-220’s left preamp out
jack to a second KX-220’s power amp input jack (see #21).
21: Power Amp Input Jack: Connection directly into the KX-
220’s internal power amplifier is possible through this jack.
The amp will ignore any other input signals, all control set-
tings and any external effects, and will only amplify the sig-
nal sent into the power amp input jack.
22: External Speaker Jack: Connection to an extension speaker
cabinet can be made here. The extension cabinet must have
a minimum impedance of 4 ohms. This jack is in parallel
with the internal speakers and using this jack does not dis-
connect them.
23: Power Switch: Turns the amplifier on (I) and off.
24: AC Line In: Connect the AC power cord here. Be sure the
cord is properly plugged into a safely wired, grounded 120
volt, 60Hz AC power outlet before use. (If your amplifier
was purchased outside the United States, refer to the rear
panel for power ratings.) For your safety, never attempt to
defeat the ground connection on this cord.