Ecler PAM1100 User Manual

Contents

Ecler PAM1100 User Manual Manual pdf 4 page image

41. IMPORTANT NOTICEWe thank you for trusting on us and choosing our PAM series power amplifier.In order to obtain the maximum performance and perfect operation, it is VERYIMPORTANT that you carefully read this manual before connecting the unit, taking specialattention to the marked safety warnings.We recommend our authorised Technical services if any maintenance task should beneeded so that optimum operation shall be achieved.1.1. PrecautionsThe amplifiers, specially the high power models, have a high power consumption andso, special care must be taken when sizing the mains wiring. We recommend a 2.5mm2 (orbigger) section for the PAM1100/2100 models and 4mm2 section for the PAM4100/6100models. The installation should also dispose of a multipole magnetothermic circuit breaker orswitch with a minimum contact separation of 3 mm between each pole and should handle atleast 10 A for PAM 1100/2100 and 25 A for PAM 4100/6100 models. These values are for oneamplifier and 220VAC; double the values if the amplifier operates at 110VAC.The amplifier must be linked to a proper earth connection which must also be isolatedfrom the machines not related to the audio chain (Earth resistance Rg=30 Ω or lower).The environment must be dry and dustless. Do not expose the unit to rain or watersplashes, and do not place liquid containers or incandescent objects like candles on top of theunit. Do not obstruct the ventilation shafts with any kind of material.WARNING! Always disconnect the amplifier from the mains supply before handlingand/or connecting or disconnecting it and for additional safety issues wait at least10 minutes in order to allow the power supply capacitors fully discharge. Neverconnect the loudspeakers while the amplifier is on! Remember that voltages as high as 400Vppand up to 150A currents can be present at these outputs. The output cabling should beconnected by a qualified technician. Otherwise only use pre-made flexible cables. There are nouser or serviceable parts inside the amplifier.2. INTRODUCTIONThe PAM amplifiers have been designed to fulfil the audio professionalrequirements of a tough and reliable power amplifier. The models PAM1100 and 2100represent the fifth generation of SPM Technology (Switching Power Mosfet), developed andpatented by ECLER - Laboratorio de Electroacústica S.A., incorporating further improvementsupon this technology first used in 1989. These components were only used in switchingapplications until today and their use in the audio field means a firm and spectacular progress inrelation to conventional systems.This advantages can be summarised as follows:a) The internal resistance is lower for the switching mosfets than for the bipolartransistors, meaning that the amplifier will operate colder and with strong and well controlledbass.The conventional audio mosfets have an internal resistance 4 to 7 times greater than theswitching mosfets.