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KXB500 Control Panel
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1. Input: This is a ¼-inch input jack that is used to connect your bass to the amplifier's circuitry. It is designed to
accommodate passive or active instruments with up to 3 volts maximum RMS output (4.2 volts peak). It is optimized for
bass guitars but will accept other instruments as well.
2. Gain: Adjust this control clockwise as required to increase the amount of preamp gain. If your bass has powerful or
active pickups, you may need to reduce Gain to avoid unwanted distortion. Alternately, if your bass has low-output,
vintage-style pickups, you may need to turn the Gain control up. Start with this control set at 12:00 to determine if further
adjustment is required.
In general, set the Gain control as high as possible without generating audio distortion, unless of course you desire it.
3. Clip: This feature samples gain levels at multiple locations throughout the amp's circuitry and illuminates when
clipping (distortion) occurs. When this happens, turn down the Gain control until the Clip indicator only occasionally
lights up.
4. Mute: When this switch is depressed, it turns off the Speaker Outputs and Line Out so that you may tune up in silence
when using a tuner connected to the Tuner Out jack. This feature is also useful when you want to unplug and change
bass guitars during a live performance. When Mute is activated, its red L.E.D. will flash.
Mute also may be activated via a footswitch. When used with a double-function footswitch such as the Kustom Model
KACFS2B, the Mute function and the Effects Loop may individually be turned on and off.
5. Bass: This active shelving control adjusts the low-frequency equalization of the amplifier. It provides +/- 20dB boost or
cut at 40 Hz.
6. Middle: This active control adjusts the midrange frequency equalization of the amplifier. It provides +/- 12dB boost or
cut centered at 500Hz. To help dial-in the ideal midrange response, a Pull Shift function moves the midrange control to
operate at 700 Hz, +/- 12 dB. The result is a bigger, thicker low-end response when required. To activate, pull the Mid
knob outward.
7. Treble: This active shelving control adjusts the high frequency equalization of the amplifier. It provides +/- 20dB boost
or cut at 20KHz.
8. Master: This controls the overall volume level of the amplifier.
9. Aux In: This is a 1/8-inch, stereo jack that allows playback from a Compact Disc, MP3 player or other audio device.
The overall volume level will be determined by the audio device alone, so start with lower volume levels and increase as
needed. Note: All KXB500 controls are nonfunctional when a discrete audio device is connected to its Aux In jacks.
10. Headphones: This is a 1/8-inch input jack intended for headphone use. If a speaker cabinet is connected to the
KXB500, its speaker outputs will be silenced when headphones are plugged in. If both headphones and an external
audio device are simultaneously plugged in, both signals will be heard in the headphones alone, with no signal being
broadcast through the loudspeaker.
11. Power Switch: This dual-function component is both an On/Off power switch and a status indicator light. When
illuminated, it shows that your amplifier is ready to be played. To turn amplifier on, press switch upward. To turn amp off,
press switch downward.
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