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EFFICIENCY SERIES ES 20

High Efficiency Power Amplifier
User Manual

stage accompany

ES 20 USER MANUAL

Summary of Contents for EFFICIENCY SERIES ES 20

Page 1: ...EFFICIENCY SERIES ES 20 High Efficiency Power Amplifier User Manual stage accompany R ES 20 USER MANUAL...

Page 2: ...n The Netherlands This manual is intended to provide information about the Stage Accompany ES 20 Every effort has been made to make this manual complete and as accurate as possible However no warranty...

Page 3: ...stage accompany R ES 20 USER MANUAL Table of Contents Quick Introduction to the ES 20 Introduction Connections Operation Recommendations Technical Specifications Warranty Overview...

Page 4: ...3 1 3 2 Audio Connections 3 4 3 3 Loudspeaker Connections 3 5 4 Operation 4 1 4 1 Input Attenuators 4 1 4 2 Bridge Mode Switch 4 1 4 3 Ground Lift Switch 4 2 4 4 Indicators 4 2 5 Recommendations for...

Page 5: ...receding equipment with the ampli fier switched on Important When combining ES 20s with a Stage Accompany Blue Box system you must take into account that the low frequency loudspeaker of the Blue Box...

Page 6: ...used The ES 20 is protected against the connection of speaker impedances less than 2 or even short circuiting of the output In these cases the output current is limited but the amplifier keeps workin...

Page 7: ...ernal EFN circuit with plug in modules extra functions can be added to the amplifier like cross over high low or band pass filtering equalisation and loudspeaker protection Special protection boards a...

Page 8: ...witching between mains voltages has to be done by an authorised Stage Accompany service centre Connecting to the wrong voltage is dangerous and may damage the amplifier Always ensure that you use a co...

Page 9: ...f the same type and value Current Table Below the current consumption of the ES 20 is tabulated for two selectable mains voltages The power consumption shown applies to 1 8 of maximum output power pin...

Page 10: ...mains cable length in meters given the cable gauge in square millimeters and the number of ES 20s supplied through the cable Maximum Length ML G 15 N Maximum Length ML G 60 N 110 120 V Cable Gauge mm...

Page 11: ...balanced input stages even in unbalanced situations use balanced signal cables and connect pin 3 to pin 1 at the output of the preceding equipment If this is not possible connect pin 3 to pin 1 at th...

Page 12: ...mic Damping Control terminals are linked together at the loudspeaker terminal The signal and DDC terminals are linked at the loudspeaker terminal A maximum damping is obtained with these connections I...

Page 13: ...abling the amplifier s feedback network signal gain will be almost infinite The smallest input signal will result in full power output with the possibility of square waves damaging your loudspeakers T...

Page 14: ...d DDC leads as soon as possible behind the output terminals of the ES 20 see figure 3 7 on this and figure 3 8 on the next page 2 2 1 1 SPEAKON NL4FC Figure 3 7 Try to avoid this way of connecting sev...

Page 15: ...ier output terminals solves these problems see figure 3 8 The DDC system corrects the performance loss due to connectors loudspeaker cables and so on However it cannot prevent loss of power So only us...

Page 16: ...loudspeaker cable power loss Per loudspeaker impedance a table is shown in tables 3 9 to 3 12 with the proportional power loss given the loudspeaker cable gauge in square millimeters and the cable len...

Page 17: ...2 8 1 7 1 1 30 14 5 9 3 7 8 6 0 4 1 2 5 1 6 40 18 5 12 0 10 2 7 8 5 4 3 3 2 1 50 22 1 14 5 12 4 9 6 6 6 4 1 2 6 100 36 2 25 4 22 1 17 5 12 4 7 8 5 0 Table 3 6 Proportional power loss as a function of...

Page 18: ...e counter clockwise position is 90 dB Warning For bridge mode operation always set the input attenuators in the same position If the attenuators are not in the same position either the amplifier can n...

Page 19: ...one channel does not affect the other channel In case of a continued overload of both channels it is possible that the power supply runs hot In that case both inputs are muted simultaneously DC the D...

Page 20: ...new one of the same type and value A different fuse can cause permanent damage to the amplifier All internal fuses are of an automatic type so they do not need to be replaced Always disconnect the ES...

Page 21: ...c Distortion THD 0 2 20 Hz 20 kHz more than 2 load at all powers 1 dB below clipping 0 01 1 kHz 100 W into 8 0 1 20 kHz 100 W into 8 Intermodulation Distortion IMD 0 1 200 Hz 10 kHz 0 3 10 kHz 20 kHz...

Page 22: ...ly Voltage internally switchable 110 120 220 240 VAC Power consumption typical Idle 1 8 Power pink noise 2 50 VA 1400 VA Weight 21 4 kg 47 lb Housing 19 in rack mount 3 HU high 410 mm 16 1 in deep beh...

Page 23: ...e first consumer purchase computers and associated peripherals six months from the date of the first consumer purchase To validate warranty the purchaser must always keep the original receipt of purch...

Page 24: ...the service centre or factory However New Stage Accompany B V will pay for the costs of return shipment to the customer if repairs are covered by warranty Caution Warranty work can only be performed a...

Page 25: ...8 Overview OVERVIEW stage accompany R ES 20 USER MANUAL 8 1...