Boss Audio Systems 624B User Manual page 7

EQ BUTTON (PRESET EQUALIZER)
DSP OFF->CLASSIC->POP->ROCK
At DSP off mode preset equalizer will be controlled by Bass / Treble setting.
LOUDNESS BUTTON
Use this LOUDNESS control to increase bass output.
ENCODER VOLUME KNOB
When the Menu function is not activated, rotate this knob to change the volume level.
When Menu function is activated, rotate this knob to navigate through different menu items.
SRC BUTTON
Press this button to select different sources , sequence as follow:
A) Tuner mode (Radio)
B) USB (only if a USB drive is inserted)
C) SD / MMC (only if a SD or MMC card is inserted))
D) AUX IN
E) BT MODE (only if unit is paired to a mobile phone)
SOURCES PRIORITY
Whenever a USB or SD/MMC is being inserted, unit will automatically switch to USB or
SD/MMC mode, does not matter the unit is currently in what mode.
When in USB or SD / MMC mode, if the USB or SD / MMC is being removed, unit will
automatically switch to radio mode.
FRONT AUX INPUT
Connect the external signal to the front 3.5mm earphone jack on front panel, then press
Mode button to select Aux mode. Press Mode button again to cancel Aux Mode and return
to previous mode.
INFO BUTTON
At Radio mode Press this button to view frequency of the station in listening and clock time .
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