Alto Professional TX308 Guide D'utilisation page 5

Setup
Volume Control (TX308 & TX310 only)
The TX308 and TX310 loudspeakers accept both line-level and mic-level audio sources.
Before connecting your audio source, turn the Volume knob to the minimum position (fully
counter-clockwise).
Line-Level Audio Source
When using an audio source such as a mixer, CD/MP3 player or audio preamp, follow the
outer/Line level band indicator.
If the Signal Limit LED is lit red constantly or the sound is distorted, do not advance the
Volume knob any further. Doing so may damage your TX3 loudspeaker. Reduce the
signal level of your sound source, or lower the volume with the Volume knob.
In most circumstances, you will not need to turn the volume beyond 0 dB.
If your audio source has unusually low output, you may turn the Volume knob past 0 dB, but
not past the Signal Limit indicator (as explained above).
Mic-Level Audio Source
Important: If you are using an instrument with active preamp, treat the instrument as a
line-level audio source (as explained above).
When using a microphone or instrument audio source, follow the inner/Mic level band
indicator.
Because the mic and instrument level is typically lower than a line level, you can use the
full rotation of the Volume knob.
As you turn up the Volume knob, please observe the Signal Limit indicator. If the Signal
Limit LED is lit red constantly or the sound is distorted, do not advance the Volume knob
any further. Doing so may damage your TX3 loudspeaker. Reduce the signal level of your
sound source, or lower the volume with the Volume knob.
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