USB-80 Mixer Amplifier
Owners Manual
3
Front Panel Description
1. Output Power Meter
Displays relative output level of the amplifier. Left most yellow indicator acts as power indicator for the
amplifier and will remain continuously lit when power is turned on.
2. Input #1~3 Level Controls
Adjusts individual level input for the three mic inputs. Fully counterclockwise position is off for each input.
This adjustment affects all inputs as fed to the amplifier and the REC output.
3. Input #4 Level Control
Adjusts input level for the AUX input as well as the MP
3
player. Fully counterclockwise position includes a
detent off position which turns power off to the MP
3
player. This adjustment affects all inputs as fed to the
amplifier and the REC output.
4. Treble control (master)
This control adjusts high frequencies centered at 10KHz at a rate of ±10dB. This adjustment affects all
inputs as fed to the amplifier, but not to the REC output.
5. Power Switch
Rocker type switch turns on the amplifier when in the UP position.
6. Microphone #1~3 Inputs
Each 1/4" female jack accepts balanced mic level input.
7. AUX #4 Input
1/4" female jack accepts unbalanced line level input. Signal fed to this input will be mixed with the
program material from the MP
3
player, with the level of both being the same.
8. Bass control (master)
This control adjusts low frequencies centered at 100Hz at a rate of ±10dB. This adjustment affects all
inputs as fed to the amplifier, but not to the REC output.
9. LCD Display
Upon insertion of the flash memory, the player will determine the total number of music files present, and
then automatically begin playing the first file. The display shows a numeric value for each file, from 1 to
the total number of files present, up to 999.
10. Previous File Select
During song play, depressing this button will revert back to the previous file on the thumb drive or flash
memory. From that point, each time the Previous File Select button is depressed, the player will increment
back one file on the play list. Once the first file is reached, depressing the button will jump to the last song
on the play list.
11. Next File Select
Depressing this button will advance to the next file on the thumb drive or flash memory. From that point,
each time the Next File Select button is depressed, the player will increment forward one file on the play
list. Once the last file is reached, depressing the button will return to the beginning of the play list.
12. Stop
Depressing this button will stop the play of the current file.
