IRP PA-4020B Installation & Operation Manual Download Page 10

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Ground

Lift

On
LMT
Off

Bridge

Channel 2

Channel 1

-----

1 2
3

Input

Connector

Input

Connector

Figure 2 Rear Panel Input Connections

1 2
3

-----

N/
C

-----

Dual-Channel mode both Channel Inputs

1 2
3

N/
C

1 2
3

N/
C

-----

Bridged mode - Connection to Channel 1 Only

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

240V - 3 A

120V - 6A

√√√√√

Input Connections

Summary of Contents for PA-4020B

Page 1: ... net INST INST INST INST INSTALLA ALLA ALLA ALLA ALLATION TION TION TION TION OPERA OPERA OPERA OPERA OPERATIONS MANU TIONS MANU TIONS MANU TIONS MANU TIONS MANUAL AL AL AL AL P P P P PA SERIES PO A SERIES PO A SERIES PO A SERIES PO A SERIES POWER WER WER WER WER AMPLIFIERS AMPLIFIERS AMPLIFIERS AMPLIFIERS AMPLIFIERS P P P P PA 4020B A 4020B A 4020B A 4020B A 4020B ...

Page 2: ...f le of Contents Contents Contents Contents Contents List of Tables and Figures ii Important Notices 4 FCC Compliance 5 Product Description 6 Specifications 7 UnPacking 8 Mechanical Mounting 8 Connections 9 Trouble Shooting 13 Warranty Provisions 13 i ...

Page 3: ...output Connections 12 Figure 5 Bridged mode 70 7 volt output Connections 12 Table 1 Output Power versus Impedance 7 Table 2 Input Signal Characteristics Thermal Considerations 8 List of List of List of List of List of T T T T Ta a a a ab b b b bles and Figur les and Figur les and Figur les and Figur les and Figures es es es es ii ...

Page 4: ... e e e e The PA 4020B is enclosed in a chassis which is devoid of ventilation holes Consequently it is by and large impervious to happenstance s where liquid or other corrosive elements can be intro duced into the interior of the chassis However the external connections on the rear panel of the amplifier could be adversely effected by exposure to water or other liquids Hence as a general precautio...

Page 5: ...mined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient the receiving antenna Relocate the amplifier with respect to the receiver Move the amplifier away from the receiver Plug the amplifier into a different electrical outlet so that the amplifier and the receiver are on different electrical branch circui...

Page 6: ...most easily specified and installed amplifiers available This iis reflected in its overall design and feature set The amplifier is able to operate on 120 or 240 volt ac power at 50 to 60Hz With convection cooling when idling the unit draws very little power thus producing remark ably little heat Inasmuch as it utilizes signal de pendent switching power supplies the highly effi cient PA 4020B has o...

Page 7: ...icators Input channel connector 2 removable screw clamp connectors 2 XLR type 3 pin connec tor Output channel connectors each channel two 4 way binding posts each 2 Speakon connectors 1 Ground lift switch 1 Bridge mode switch 1 Ac line fuse 1 3 pole grounded male IEC connector Maximum audio power output see table Ac Power requirements 120 240V 10 50 60Hz draws 20 watts on idle 300 watts at 200 wat...

Page 8: ...ment Examine the dipswitch carefully for possible ship ping damage Verify that the Bridge Stereo switch is in the proper position for the intended service Mounting Mounting Mounting Mounting Mounting The PA 4020B is intended for mounting in a stan dard 19 equipment cabinet and will occupy 1 RU 1 75 of rack space The unit is attached to the equipment rack by using four mounting screws inserted thro...

Page 9: ...s Audio Input Connections Audio Input Connections Audio Input Connections Audio Input Connections All input connections are made on the rear panel of the PA 4020B Power Amplifier Each channel is equipped with a 3 pin screw clamp barrier strip type connector and a 3 pin XLR type con nector Choose which type of connector you plan to use and connect accordingly Connections may be made to either the t...

Page 10: ...ector Input Connector Figure 2 Rear Panel Input Connections 1 2 3 N C Dual Channel mode both Channel Inputs 1 2 3 N C 1 2 3 N C Bridged mode Connection to Channel 1 Only 240V 3 A 120V 6A Input Connections Input Connections Input Connections Input Connections Input Connections ...

Page 11: ...the PA 4020B will drive two output transformers to produce 350 watts at 70 7 volts When used in a constant voltage mode the sound system should have a high pass filter low frequency cut to prevent saturation of the constant voltage transformers A second order 12dB octave Butterworth filter at 40Hz or higher frequency is recommended A first order 6dB octave filter may be used if it is placed at 80H...

Page 12: ... 100 watts per Channel Output Output Connections Output Connections Output Connections Output Connections Output Connections DH 100 DH 100 NC DH 100 NC NC 1 2 1 2 2 3 4 3 4 70 7 volts 200 watts Fig 5 Bridged mode Constant Voltage 200 watts Total Output ...

Page 13: ...ries used therewith not of IRP manufacture IRP s obligation under this warranty as to any products or parts approved by IRP for remedy or exchange is limited at its option to replacing such products or parts in kind without charge to the original purchaser or to crediting the original purchaser with the purchase price of the returned defective products This warranty is in lieu of all other warrant...

Page 14: ...14 IRP professional sound products L P 1225 Greenbriar Drive Suite R Addison IL 60101 USA 800 255 6993 630 860 1993 FAX 630 860 1997 www irp net ...

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