OPERATIONStandby ModeVena will be in standby mode when powered on. The indicator on front panel is lit. Press button to bring Vena out ofstandby. Vena will automatically go into standby mode when there is no signal input or operation for 30 minutes. Vena will beswitched to the Bluetooth source input when unit is activated for the first time, and switched to the last input source used afterthat.Protection ModeVena is protected by a thermal switch which interrupts the AC Power supply if the amplifier is grossly overloaded for a period oftime. To restore operation, simply press the button on the front panel. It is thus fully protected against gross overload, short-circuited output etc, but not necessarily against seriously inadequate ventilation.Mute ModeVena will go into Mute mode with no sound output for 3 seconds when the unit is switched on and all indicators will flash 3times. After 3 seconds the indicators will stop flashing and Vena will exit from Mute mode.Users can also press to bring Vena in or out of Mute mode when playing music.Volume knobVena has a volume control knob on the front panel. Users can decrease or increase the music level with this volume knob. Pleasealways turn up the volume gradually.Playing Music via Analog InputsConnect the analog signal of a source unit to Vena’s AUX1 or AUX2 input. Press AUX1 or AUX2 button on the front panel.AUX1 or AUX2 indicator will be lit and music will start playing.Playing Music via Digital InputsConnect coaxial SPDIF signal of source units to the digital in COAX jack on Vena’s rear panel. Press COAX button on the frontpanel, COAX indicator will be lit and music will start playing.Connect optical (TOSLink) signal of source units to Vena’s OPT1 or OPT2 jack on Vena’s rear panel. Press OPT1 or OPT2button on the front panel. OPT1 or OPT2 indicator will be lit and music will start playing.Playing Music via USB inputConnect a Mac or PC via the B-type USB interface on Vena’s rear panel. Press USB button on the front panel. USB indicatorwill be lit, and then click Play on your music player software to play audio files stored on your computer.