Ecler HZA4-70F User Manual

Contents

84.2. Front panel LED indicatorsThe HZA4-70F is equipped with the following front panel LEDs: STBY indicator (1): illuminates when the amplifier is in standby (low consumption mode), afterapproximately two minutes without any input signal detected. When an input signal is re-detected,the amplifier automatically switches back to normal operating mode. Signal Presence indicators, SP (2, 7, 12, 17): warn of the presence of signal at the amplifier inputs.These indicators illuminate when the input signal exceeds -35dB. Overload indicators, OVL (3, 8, 13, 18): illuminate when the channel reaches its maximum powercapacity, due to a too low load impedance. CLIP indicators (4, 9, 14, 19): illuminate when the speakers output signal is close to the actualclipping level. The CLIP system takes into account possible fluctuations in the supply voltage ifthey exist, always giving a real indication. It is normal when you work at high power levels thatCLIP indicators illuminate to the beat of the low frequencies, which are those with the higherenergy content. Make sure this doesn’t permanently illuminate indicators during normal operatingmode. Thermal protection indicators, TH (5, 10, 15, 20): indicate that the channel over-temperatureprotection has been activated; normal operation will be restored when the temperature returns tothe correct operating temperature range. MERGE Indicators: they indicate whether the FLEXIPOWER function that links two adjacentchannels has been activated with the switches on the rear panel or not.4.3. Front panel volume controlsThe front panel features four volume knobs, one per channel, allowing independent adjustment ofthe maximum output level for each amplifier channel.Remote control ports also allow to adjust the volume of each amplifier channel from a WPmseries panel, a potentiometer or other external hardware device; the actual volume of each channel isthe result of the two volume controls position (front panel and remote control).In the device packaging, you’ll find a bag with clear caps to be inserted on the front panel knobs.They protect the input attenuation settings from unsolicited tampering. Once inserted, you must use aflathead screwdriver or a similar tool to remove them.4.4. AUTO STBY ON/OFF switchSwitch (39) that enables/disables the auto standby mode (sleep or low consumption mode). If thisfunction is activated, the amplifier will switch to standby after approximately two minutes without anyinput signal detected. When an input signal is re-detected, the amplifier automatically switches back tonormal operating mode.5. CLEANINGThe front panel should not be cleaned with dissolvent or abrasive substances becausesilk-printing could be damaged. To clean it, use a soft cloth slightly wet with water and neutral liquidsoap; dry it with a clean cloth. Be careful that water never gets into the amplifier through the holes of thefront panel.