Ecler LPA6000 User Manual

Contents

74.3. IndicatorsThe LPA amplifiers provide a simple and effective system of indicators:• “PROTECT” indicators (2): They indicate the absence of a power signal in the loudspeaker output of theamplifier. They may be activated for various reasons:1. In the startup period, from when the power-on button is pressed until the startup time necessaryto stabilize the internal voltages of the amplifier has been completed (approximately 10 seconds).2. Due to the presence of a short-circuit in the output terminals of the amplifier (crossed cable,damaged loudspeaker, etc.).3. If the amplifier is supplying a continuous signal or a very low-frequency signal, which coulddamage the loudspeakers.CAUTION: If these indicators remain permanently switched on, even when all signal input andoutput cables have been disconnected from the amplifier, this could be a sign of a malfunctionwhich should be analyzed by the official Ecler technical support service.• “CLIP” indicators (3): They light up when the amplified signal present in the amplifier output is just belowthe level of clipping or saturation. This system always provides a true indication, regardless of thevariations in the mains voltage. When operating at high power levels, it is normal for the CLIP indicatorsto light up briefly at the moment of low frequencies, because it is the low frequencies which make thegreatest energy contribution in the audible spectrum. You must try to ensure that these indicators do notremain lit up permanently in the normal operating conditions of the amplifier.• “SIGNAL” indicators (4): They indicate the presence of a signal in the amplifier inputs. These indicatorslight up when the signal present in the input exceeds the threshold of –40 dB.5. CLEANINGThe front panel should not be cleaned with dissolvent or abrasive substances because silk-printingcould be damaged. To clean it, use a soft cloth slightly wet with water and neutral liquid soap; dry it with a cleancloth. Be careful that water never gets into the amplifier through the holes of the front panel.