Ecler Ampack2-20 User Manual

Contents

83.5. Input/Output optionsThe AMPACK2-70 allows the following operating modes:• Stereo: channels 1 and 2 are separately amplified and respectively sent to outputs 1 and 2 (theMono/Stereo switch, labelled as MONO 1 +2 on the front panel, must NOT be engaged)• Parallel (Mono): the Mono/Stereo switch, labelled as MONO 1+2 on the front panel, must beengaged. Channels 1 and 2 are summed and sent to the amplifier channels 1 and 2, eachchannel having an independent output volume• Bridged: the switch should also be engaged, as in the previous case. Observe the output wiringguidelines indicated on the device when it operates in bridged mode. Channels used in bridgedmode should have their "VOL" attenuators set at the same position, preferably at maximumlevel.The AMPACK4-70 allows the following operating modes:• Independent: channels 1, 2, 3 and 4 are independently amplified and respectively sent tooutputs 1, 2, 3 and 4• Parallel: to operate in this mode, you must connect the same input signal to multiple channelsof amplification, each channel having an independent output volume• Bridged: this mode can operate with channel pairs 1-2 and/or 3-4. This requires connecting thesame input signal to channels 1-2 (and/or 3-4) and wiring outputs as indicated on theequipment for operating in bridged mode. Channels used in bridged mode should have their"VOL" attenuators set at the same position, preferably at maximum level.4. OPERATION AND USAGE4.1. Start upThis can be done using the power switch (1) and immediately the ON led (3) will startlightning. We highly recommend the "safe power up sequence": First the sound sources, then mixer,equalizers, active filters, processors and, finally, power amplifiers. Powering off should be done byfollowing the exact reverse sequence in order to avoid any possible peaks reaching the next device,and consequently protecting the loudspeakers, which are specially sensitive to these peaks.4.2. Input attenuationThese are rotary potentiometers, one per channel, located on the front panel (9) and labelledas VOL.These attenuators allow connection of different sound source types, independent levelcontrol per channel of amplification and connection of speakers handling less power than theamplifier can provide at full capacity (avoiding damage by negligence when setting the sound sourcevolume).An independent level adjustment can be done using a screwdriver or another appropriatetool.