OPERATING INSTRUCTIONS
Contents
1. I T XIN oco vsn dcr uy 919 610 e A001 I zo Os X JSI AST vr SAA Ora Doc BL2085 REDBACK A 4020 30 Watt Amplifier SPECIFICATIONS POWer OUtDUt ette rex ied 30 watts RMS OUTPUT CONNECTORS DISTOFHOTU i osse entere Peintre 0 5 1kHz ci ccu Screw terminals Output liie ii tenets caves eere 100V MUTING SIGNAL TO NOISE RATIO All volume controls min typically 72dB below rated out put All inputs display same S N ratio FREQUENCY RESPONSE Ni oec 52Hz 10kHz 3dB LING RETE TET 40Hz 10kHz 3dB INPUT SENSITIVITY MIC In pU iecore irme einn 2 6mV balanced Line Inputs ait trie te inet dus 150mV CONTROLS Volume 1 Controls mic 1 line 1 Volume 2 Controls line 2 BASS 10dB 100Hz Treble 13dB 10kHz POWEYM L cccccccceesececetecsessceeeeteeeeseeeeeseneaneeees On off switch TROUBLE SHOOTING NO POWER Power LED light does not illuminate Check mains fuse Only replace with M205 240V AC 0 5A rated fuse DISTORTED OUTPUT Check that the speaker type is correct for the output that you are using Check for any short circuits on the speaker line VERY LOW OUTPUT Make sure that the input is the correct level check for short ed connectors Check for any short circuits on the speaker line CONTINUALL2. Y BLOWS FUSES Make sure that the speaker line is not shorted Check also speaker types ratings and if on correct output AMPLIFIER KEEPS ON CUTTING IN amp OUT Make sure that there is adequate ventilation around the amplifier Check the vent slots on the case are not covered or blocked Check also speaker types ratings and for any short circuits on the speaker line Page 4 VOX only 79dB INPUT CONNECTORS MIC 3 pin XLR balanced Line inputs RCA stereo socket bridged mono 240V AC IEC power connector Power Supply eire 240V AC INGICALOMNS DD cts Power Fuse protection 500mA AC 3A x 2 DC internal SIZE 300W x 220D x 74H mm Weight e 4 8kg Colour cic Black Input Balanced lt q From Microphone Input Unbalanced lt q From Microphone b Microphone Connections Connector Type XLR 3Pin Female Pin Yann mmm Earth Pin2 eene Signal Inphase hot Signal Out of Phase cold FIGURE 1 Doc BL2085
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4. n bass and treble to midway point 2 Turn all volume controls to zero 3 Turn power switch on Power indicator should illu minate 4 Turn on microphone or auxiliary input source and adjust appropriate volume control to desired level The microphone and auxiliary for input 1 are mixed together Both the mic and auxiliary inputs can be run together but note there is only the one volume control for both of these Distributed by Altronic Distributors Pty Ltd Perth Western Australia Phone 1300 780 999 Fax 1300 790 999 Internet www altronics com au Proudly Assembled in Australia Doc BL2085 E T lt Ci lt S Q aa Doc BL2085 ZN o XX 9 9907 _ Om z 9907 AA arn EAA yz SeA f E3 X c E Y dt X D ES am ow c arn at 1 3001 b AR fe en T X SH pud M EH up 71 Shir _ sio aca em J 8g V 10 1001 MU eo eur qo q PIOS SAL a 97 X01 ii a m R Ds IAA d 2 8 i z 858 M La 99 IHXIIN OL C INANI p XIN LTA NOININOO OL I INANI e P AR A A
5. www altronics com au 30W Public Address Amplifier OPERATING INSTRUCTIONS A 4020 30W Desk Mount Amplifier FEATURES 1 balanced microphone input 2 auxiliary inputs Bass and treble controls on both microphone and auxiliary inputs Full 30W RMS output 100V Protection against over voltage over current thermal run away and short circuit load Internationally accepted IEC mains socket 240 AC operation only Stereo RCA sockets for all auxiliary inputs config ured to mono internally allowing standard stereo equipment to be directly connected Ten year warranty CONNECTING UP THE UNIT Microphone One Microphone inputs are connected via balanced XLR 3 pin socket For connection to the 3 pin XLR sockets refer to Fig 1 Auxiliary Inputs Both auxiliary inputs are connected via standard RCA sockets Speaker Outputs Screw terminals are provided for 100V outputs Minimum impedance for 100V loads is 333Q When only the 100V output is used If more than 30W is used then the unit may shut down due to overloading VOX Muting Adjustments VOX can be selected ON or OFF on the board via the internal jumper This is factory set in the OFF position VOX sensitivity is adjusted via trimpot on rear of unit Once VOX muting is activated input 1 will override input 2 Both mic 1 and aux 1 inputs will activate the vox mut ing OPERATION Once all inputs and outputs are connected 1 Tur
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