104.5. AUTO STANDBY functionThe AUTO STANDBY functionality allows flexible installation of the AMPACK series in lessaccessible places, since you can leave the device indefinitely connected to mains supply, its activationor deactivation automatically depending on the presence of an input signal.If the signal present at any of the device inputs remains under -35dBV for more than 2minutes, the AMPACK automatically enters in STANDBY mode. This is well indicated by the front panelON indicator turning from green (ON) to red (STANDBY).When in STANDBY mode, the power consumption of the AMPACK2-70 and theAMPACK4-70 is lower than 9W.When the signal level becomes higher than -35dBV the device will automatically switch to ONmode.4.6. IndicatorsThe "SP" LED (8) indicates signal presence at the amplifier input. It lights up when theinput level exceeds the set detection threshold.The "CLlP" LED (10) lights up when the signal delivered to the speakers is nearly really toclipping or amplifier saturation. This system considers possible variations of the mains voltage,always giving a real indication independent of the mains voltage. Care should be taken whenadjusting input levels. The CLIP indicators (saturation or clipping) should never stay permanently lit,but only (and at the most) at the rhythm of the sound sequence lowest frequencies. Otherwise thesignal feeding the power stages would suffer high distortion levels and have low acoustic quality andintelligibility.