inout HA4V-R User Manual page 7

2.2 Front panel description
1) Headphones stereo jack connectors
2) "Device ON" LED, powered device.
3) Two-colour LED with indication purpose:
LED
off
green
red
Yellow
(POWER ON)
4) Channels 1-2-3-4 volume adjustment knobs
HA4V-R User Manual v.1.0
Description
= input signal not present or too low
= input signal present
= input signal too high
= When blinking indicates that the input
channels 2-3-4 are switched on the
channel 1 signal input
Pag. 6
Indicating
SIGNAL
PEAK
CH1 SUM