Specifications

USB-80 Mixer Amplifier Owners Manual
8
Installation of the Amplifier
• Be certain that the power is removed from the amplifier
• Locate the amplifier in a suitable shelf or tabletop. If positioned with other components, it is not
recommended that other devices be located on top of the amplifier.
• Connect speakers as described in the previous pages
• Connect desired input sources such as microphones to the MIC inputs, or a line level device to the
AUX input
• Make certain that the volume controls for each of the #1~4 inputs are set to the minimum
• Make certain that the power switch is in the OFF (down) position
• Connect the amplifier to a suitable 12VDC or 120VAC power source. Note that at full output power,
this amplifier will require approximately 6A if connected to a 12VDC source.
• The amplifier is now ready for use
Operating the amplifier
• If this is the first time operating the amplifier, make certain that all volume adjustments are set to
the minimum position
• Be certain that the amplifier is connected to a suitable power source and speakers are properly
connected
• Turn the amplifier power switch to the ON (up) position
• The leftmost yellow OUTPUT indicator should light
• If microphones are connected, speak into the microphone and adjust the appropriate volume
control until the mic volume reaches the desired level
• If a line level device is connected to the AUX input. adjust the appropriate volume control until the
volume reaches the desired level
• Adjust the Bass and Treble controls to the desired level
• If an SD or MMC card, or USB thumb drive is inserted into the appropriate slot, the amplifier will
automatically begin playing the first music file (see details below)
• The AUX volume level control will simultaneously adjust the level of the AUX input and the MP
3
player
• The AUX volume control has an OFF detent in the full counterclockwise position. In this OFF
position, power is removed from the MP
3
player
• While audio is played through he amplifier, the LED OUTPUT indicator will show relative power
output
Operating the MP
3
Player
The built in media player is compatible with all MPP
3
and WMA audio files, and will play them automatically
when media is inserted into the player. It should be noted however that certain MP
3
files downloaded from
subscription services may contain copyright protection that will prevent them from being played in this
unit. Also, this unit
will not read iTunes files downloaded for the iPod. As with any MP
3
player, the most
reliable source for music files to play on this amplifier is MP
3
or WMA files created from ripping CD's or
copying vinyl on a standard PC.
Operation
• Make certain the amplifier power switch is in the ON position
• Make certain the AUX volume level is fully counterclockwise in the OFF position
• Insert a thumb drive, SD or MMC card containing desired music files
• Turn the MP
P
3
player on by rotating the AUX volume control clockwise to the 9 o'clock position
• The LCD display will remain blank while the MP
3
player determines the number of music files on the
inserted media. Depending upon the number of music files, this may take several seconds.
• The display will show 001 and begin playing the first song
• Adjust the AUX volume control to the desired level
• The MP
P
3
player will sequentially play each song and stop after finishing the last
• Songs may be manually repeated or skipped using the PREV and NEXT buttons
• Pressing the STOP button once will stop the song, pressing play again will start the current song
again from the point it was stopped
• Pressing the STOP button twice will cause the MP
3
player to revert back to the beginning of the list
• PLAY and PAUSE functions are both located on the same button
• Pressing play will begin the current song. Pressing while the song is playing will pause the song.
Pressing again will cause the song to resume from the point where it was paused
• REPEAT button toggles between two modes. R1 will continually repeat the song playing, R-ALL will
repeat all songs on the media device in order