Peavey XR 400 User's Manual
Contents
1. ttt el OD MONITOR Buss we aw our EoD erate ron at venroncsr aa EFFECTS OUT oP EFFECTS BUSS Ee te POWER AMP spka OUT 1 vm TO MAIN BUSS mv i REVERE RETURNI q REV FOOTSWITCH REVERB oniwe REVERB UNIT DANGER TO MAIN MIX BUSS EXPOSURE TO EXTREMELY HIGH NOISE LEVELS MAY CAUSE A PERMANENT HEARING LOSS INDIVIDUALS VARY CONSIDERABLY IN SUSCEPTIBILITY TO NOISE SOME HEARING IF EXPOSED TO SUFFICIENTLY INTENSE NOISE TOR A SUFFICIENT TIME INDUCED HEARING LOSS BUT NEARLY EVERYONE WILL LOSI THE US GOVERNMENT S OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION OSHA HAS SPECIFIED THE FOL DURATION PER DAY IN HOURS OWING PERMISSIBLE NOISE LEVEL EXPOSURES SOUND LEVEL ABA SLOW RESPONSE io we 0 ns ACCORDING TO OSHA ANY EXPOSURE IN EXGESS OF THE ABOVE PERMISSIBLE LIMITS COULO RESULT IN SOME HEARING LOSS EAR PLUGS OF PROTECTORS IN THE EAR CANALS OR OVER THE EARS MUST BE WORN WHEN OPERATING THIS AMPLIFICATION SYSTEM IN ORDER TO PREVENT A PERMANENT HEARING LOSS IF EXPOSURE IS IN EXCESS OF THE LIMITS AS SET FORTH ABOVE TO INSURE AGAINST POTENTIALLY DANGEROUS EXPOSURE TO HIGH ESUND PRESSURE EVELS 1T S RECOMMENDED THAT ALL PERSONS EXPOSED TO EQUIPMENT CAPABLE OF PRODUCING HIGH SOUND PRESSURE LE THIS AMPLIFICATION SYSTEM BE PROTECTED BY HEARING PROTECTORS WHILE THIS UNIT IS IN OPERATION TIO TS SUCHAS THIS AMPLIFIER HAS BEEN DESIGNED AND CONSTRUCTED TO P2. RAO OPERATING GUIDE CAUTION TO PREVENT ELECTRICAL SHOCK OR FIRE HAZARD DO NOT EXPOSE THIS INSTRUMENT TO RAIN OR MOISTURE BEFORE USING THIS INSTRUMENT READ BACK COVER FOR FURTHER WARNINGS GENERAL DESCRIPTION The new XR 400 represents our latest effort to combine professional features previously tound only in separate mixer equalizer power amp components into a single compact and rugged package The design ot ihe XR 400utlizes the latest advances in semiconductor technology and the overall circuitry has deen designed and optimized by use of the latest computer aided design techniques This unit s improved specifications have been made possible by a thorough and complete design elfort resulting in all new circuitry from the input jack through to the speaker output The XR 400 features four independent input channels and includes a separate pre monitor send active shelving type high and low equalization and a post elfects send orreach channel Master levelcontrols are provided for the main monitor and reverb return A full five bend raphicequalizer nas been buit ino tne systemand utilizes the most contemporary active filter circuitry available Additional ilxibilt is providedby ine XR 400 s patch panel enabling this versatile unit to be used in conjunction with an extremely wide range of auxiliary equipment The 100 watt power amplitier of the XR 400 utilizes four high voltage high speed TO 3 power devices bolted to a massi
3. tings while cut OO OO O00 Oh OO O O O OO OO sp Oo 66 60 960005 MASTER MONITOR LEVEL CONTROL I The master monitor control adjusts the gain of the moriter mixing buss and determines the evel of the signal available irom the monitor output jack P The operation of this control and its independent channel sends is identicalto that of the main with the exception thet its output is applied to the monitor line output jack instead of the main output jack MASTER REVERE RETURN CONTROL J The master reverb control determines the amount of delayed signal reverberation that is mixed back into the main mix buss Theaction of this control J is defeated by use of a remote switch being plugged into the footswitch jack M locatedon the patch panel tis important to note that no reverberation will occur unless the internal delay line is being ted signal from the channel effects send controls The master rovero return control does not afiect the level available from the effects output jack located on the patch parel 0 GRAPHIC EQUALIZER K The five band equalizer is of the latest active type and exhibits performance comparable to that foundin the finest commercial equipment The graphicequalizeris locatedin the circuit just before theinternal 100 watt power amplifier and provides very versatile and professionalequalization of the overall system Because of the flexibility built into the XR 400 several different modes of operatio
4. Effects and High and Low Equalization CHANNEL GAIN CONTROL C Tne channel gain contiol varies the gain of the input preampifier This input preamp is designed arounda variable negative feedback approach and provides optimum dynamic range as well as extremely low noise operation This control is used to set the level of the respective channels to achieve the main mix CHANNEL MONITOR CONTROL D The channel monitor control isa totally independent level adjustment used for deriving the proper monitor mix Itisimportant thatthe userbe aware thal th channel monitor send is totaly independent from all other channel controls and feeds directly into the monitor buss whose output is detemine by the master monitor control 1 CHANNEL EQUALIZATION CONTROLS The channel equalization controls are of the active shelving type and provide 15 dB of boost or cut in their respective frequency ranges These equalization controis are extremely effective and wil allow the user to achieve almost any blend of high s and low s with proper adjustment Since hese EQ controls are capable of a 30 cB range care shouid be taken to properly utilize their capabilities Excessive boosting of low s can Cause muffied or boomy sounds as well as tending to prematurely overload the power amp because of excessive low frequency power requirements Ove boosting the high s will tenc to cause a strident or screechy tonality as well as tending toemphasize residual pre
5. allowing the internal graphic power amp to be utilized as a monitor amp or for any other purpose the user may deem necessary lis input impedance is approximately 50K ohms at approximately 1 volt signal level for full power output at the speaker jacks REAR PANEL FUSE S The fuse is located within the cap of the fuseholder It is necessary thal the fuse be replaced with the proper type and value if it should failin order to avic damage to the equipment and to prevent voiding the warranty If your unit repeatedly blows tuses itshould be taken to a qualified service center tor repair POWER SWITCH T On domestic units the power switch is of the three position type with the center position being OFF This switch has two ON positions one of which is used to ground the amplifier properly One of the ON positions wil yield the lowest amount of residual hum or popping when the instrument is touched and this is the position that should be used On export models we utilize a simple on off switch that does not have multiple ON positions since the grounding earthing conditions in most foreign countries are positively made through standard tamper proof plug in systems LINE CORD U For your safety we have incorporated a three wire line mains cable with proper grounding facilities is not advisable to remove the ground pin under any circumstances i it is necessary to use the amp in a two pin plug system w
6. 48 equalization boost will be 200 watts You should always begin operation with the equalizers in the 0 or center position Itis wise to avoid excessive cutting of large segments of the audio passband since this tends to reduce the dynamic range of the system Also itis better to raise thelevelcontrolrather than to use the mejority of the equalizers in the boost position since overall signal to noise ratio will result As with any equalizer device careful experimentationand a little common sense will yield the desired result PILOT LED L The pilct LED indicates when the electrical supply is switched on and is actually deliveri XR 400 PATCH PANEL The patch panel of the XR 400 has been designed to allow use cf auxiliary accessories mixers power amps etc in conjunction with this unit FOOTSWITCH JACK M The footswitch jack provides an in present no operational problems AUXILIARY INPUT N The auxiliary input providos access to the main mixing buss for patching in signals from external devices such as delay linas or extra mixing channe s Its input impedance is 22K ohms and is designed for signal levels of approximately 1 volt RMS EFFECTS OUTPUT 0 The effects output has been designed to deliver output signal from the effects buss for driving various line level devices Caution should be observed when using accessory devices with the relatively high output sional level available from the effects out Overall signal levelis determined by the s
7. ROVIDE ADEGUATS POWER RESERVE FOR PLAYING MODERN MUSIC WHICH MAY REQUIRE BCGASIONAL PEAK POWER TO RANDLE OCCASIONAL PEAK POWER ADEQUATE POWER HEADROOM HAS BEEN DESIGNED INTO THIS SYSTEM EXTENDED OPERATION AT ASSOLUTE MAXIMUM POWER LEVELS IS NOT RECOMMENSED SINCE THIS COULD DAMAGE THE ASSOCIATED LOUDSPEAKER SYSTEM PLEASE BE ENARE THAT MAXIMUM POWER CAN B OBTAINED WITH VERY LOW SETTINGS OF THE GAIN CONTROLS IF THE INPUT SIGNAL I5 VERY STRONG Read ali satety ane operating instructions betore Using this product All satety and operating instructions should be Obey ail cautions in tne operating instructions Sng on me back of the uni AII operating instruetions should be followed This product should not be used near water ie a patr tun sink swimming poo wet Baservent etc This produet snouie ve tocated so thatits position dosa not intortero wiin ts proper vention It Should not bo places fat against a wall or placed in a built in enclosure that will impede tne low of cooling air This product should not ba placed noar a source Gl heat such asa stove heater radiator or anothor hes producing ampir EEI 8 Comec only to a power supply of the type marked on tre unit adjacent to the Dower supaty cord Never break olf the ground pin an the power supply cord For more information on grounding tune Yor our Iree booklet Shock Hazard and Grounding Power supply cords shouid always be handled carotuiy Never walk oF place equ
8. amp noise and susceptibility to acoustic teodback Care should be observed when using excessive cutin either frequency rangesince excessive cutting may degrade the dynamic range capabilities of the input preamp and create poor tonality These channel equalization controls have been pravidedto achieve tonal balance as well 2s feedback control in the individual channels for the main mix only All oxporimentation should begin with these controls set in the flat 0 straight up or 12 00 position Use of the individual channe Controls in conjunction with the master graphic equalizer is vital to provide the user with optimum equalization CHANNEL LOW EQUALIZATION CONTROL E The low equalization control determines whether the low froquencios willbe boosted or cut Boost occurs in the clackwis occurs in the counterclockwise settings Flat response is obtained in the 0 or vertical position CHANNEL HIGH EQUALIZATION CONTROL F The high equalization control determines whether the high frequencies will be boosted or cut Boost occursin the clockwise settings while cut occurs in the counterclockwise settings Flat response is obtained n the O or vertical postion CHANNEL EFFECTS CONTROL G The channel effects send control adjusts the signal level applied to the effects mix buss which feeds the internal reverberation system as well as the effects output on the patch panel The overall settings of the channel effects send controls determine the amou
9. etting of the various effects send controls of the respective channels This output is of relatively low impedance and is capable of approximately 4 volts into 600 ohms or 8 volts into higher load impedances power to the amplifier utto accommodate the optional remote revert cUlot pedal This footswitch jack is conventional and shouid MONITOR OUTPUT P The monitor output provides a signal for an external monitor system and is of relatively low output impedance capable ot over 4 volts nto 600 ohms or over 8 volts into higher load impedances The level is controlled by settings of the individual channel monitor sends as well as the master monitor level control MAIN OUTPUT 0 The main quiput provides output fram the main mixing buss This output is of relatively low impedance and is capable of over 4 volts RMS ino 600 ohms or over 8 volts into higher load impedances The output level is determined by the gain and equalization settings of the individual channels as well as the master gain control GRAPHIC INPUT R The graphic input jack provides a means to allow patching into the internal graphic equalizer power amp This jack is of the switching type that normally picks up the signal trom the main outputjack Q When a plug is inserted into the graphic input the circuit path is broken and this input may owe plugged into other devices or any of the output jacks of the XA 400 The graphic input provides much greater llexibilty in
10. in ano main Lova ful CW INPUT IMPEDANCE 220K ohms Jack A 44K ohms Jack B SIGNAL TO NOISE RATIO Master 12 00 All EO let 20 Hz 20 kHz unweighted 1 Shane Gain 12 00 shorted input 84 4B channel Gain 12 00 22K chime souroo 82 dB All ohannel Gains 1200 22K ohms source 78 a8 CHANNEL EQUALIZATION 15 dB 80 Hz amp 8 kHz Shelving Characteristic MASTER GRAPHIC EQUALIZATION 3 18 GE 100 Hz 350 Hz 1 kHz 3 kHz and 8 khz Peai Notch Characteristic Average Q of 1 5 TOTAL SYSTEM FREQUENCY RESPONSE 2 dB 60 Hz 25 kHz All EQ Aist UNE OUTPUTS Main Monitor and tects MAXIMUM OUTPUT BV AMS into 10K obs 118 JBV of 4 V AMS into 600 ohms 14 ABM POWER AMP SPECIFICATIONS RATED POWER 100 W RNS into 4 ohms load POWER CLIPPING 11 THD 1 KHZ 120V VAC line Typically 20 WANS Ineo 8 ohme 120 W RMS into 4 ohms 2 onm load not fecommonses FREQUENCY RESPONSE 10 1 dB 30 He 30 kHz 100 W RMS into 4 ohms TOTAL HARMONIC DISTORTION Lees thar 0 2 100 MW to 100 W RMS 50 Hz 10 KHZ 4 hms Typically below 0 1 INTERMODULATION DISTORTION Less than 02 100 mW to 100 W AMS 60Hz amp 5 kH 4 ohms Typically below 0 1 MONITOR MON AMP TYPICAL OF 4 CHANNELS GAIN e Ei MAIN AMP MASTER Eo EFFECTS 0 w m oraemon TO MONITOR BUSS GAIN i ame TO MAIN BUSS TO EFFECTS BUSS O MAIN BUSS SUM MONITOR
11. ipment or Bower supply cords Periodically enost coras for Guts or signs of stress especially at tne plug anc no point whore the cord exit 1na UMIT The power supply cora shouia ve unplugase wnon tho unit e to bo unusod for long porloas oF Metal paris can be cleanog with a damp rag The Vinyl covering used on some unita can be cleance wth a damp ag of anammonia based household Cleaner necessary PEAVEY ELECTRONICS CORP 711 A Street Meridian MS 39301 U S A 13 Garo snouia bo takon so that objects do not tal and auias are not spilled into the unit Iouan the ventilation holes or any other apanings This unitshouls be checked by aqualtied service technician t A The power supply cord ar plug has been damaged B Anyihing has fallen or been spilled into the c The unit aves not operate correctly D Theunitnae baen cropped or neenciosure camaged Tne user should not attempt to service this eguipment An sorvico work shoul be done by avalies servico technician ue to ouretforts for constant improvement specifications are subject to change without notice 21682 Printed in USA 10 83 80322005
12. ithout proper grounding facilities suitable grounding adaptors should be used Much less noise and greatly reduced shock hazard exists when the unitis operated with the proper groundedreceptacles SPEAKER OUTPUTS V The speaker output jacks are of the standard 4 type Both the oulput jacks are wired in parallel and either or both may be used when connecting your speaker system The 200H module has been optimized for a 4 ohm load but has adequate performance te drive loads both above and below therecommended 4 chm impedance Extreme care should be used when operating a unit at below 4 chms since lower loadimpedances tend to overload the power amplifier and may cause premature activation of the power amp s short circuit protection system and or thermal fault protection circuitry LINE MAINS CORD RETAINER W We have provided two large molded line cord retainers on the rear panel t allow storage of the mains cable for travel In operation the cable should be completely unwrapped to allow maximum heat dissipation from the rear nanel heatsink XR 400 SPECIFICATIONS CHANNELS 4 INPUTS 5 High Z 4 boina high gain 4 being paddod 6 dB Graphic input Auxiliary input SENSITIVITY Master Channel Gain Vertical 12 00 setting All EO fiat 180 mu into High Gain Input or 100 W RMS speaker output into 4 ohms 42 0B Gain MAXIMUM DYNAMIC RANGE 3V AMS Jack ABV AMS Jack B MAXIMUM GAIN 56 cB wiin channel Gain full CW 70 dB Ga
13. n are possible NORMAL MODE Under normal operating conditions no patch connections the equalizer is connected through the graphic input switching jack to the main output which is the signal derived from the main mixing buss and controlled by the master gain control MONITOR OPERATION The graphic equalizer and internal power amp may be used to power a monitor system by simply patching Irom the monitor output 10 the graphic input using a short shielded patch cable Wnen inis patch is accomplished the signal trom ine main mixing buss is available only at he output jack P on the patch pane to be used in conjunction with external power amps equalizers or other accessories MASTER EQUALIZATION The master graphic equalizer is designed to provide room equalization and overall system tone control It is important to note that there areno firm operating instructions that will result in the ideal EQ for each and every set of operating conditions Experimentation with adequate understanding of the graphic equalizer is necessary to achieve optimum results No amount of equalization will corect an acoustically bad room mike speaker arrangement or completely correct the response curve of a poor loudspeaker Please make sure that the power amplifierhes adequate headroom to handle any boost that maybe incurred If you boost 100 Hz by3 dB your power requirement will double As an example if your normal performing level requires 100 watts the power requiredafiera 3
14. nt of reverb drive as well as the signal output level available from the effects output jack It is important to note that the effects send control isa post typeadustment which is located in the circutt after the channel gain and equalization controls The user should be aware thai use of the internal reverberation system can only occur when the channel gain the channel effects send the master reverb return and the master gain controls are all properly adjusted MASTER SECTION The XR 400 master section contains the overall master level control the master monitor control and the reverb return to master control as well as a five band graphic equalizer and patch panel As the name implies the master controls operate as the final control element for their respective mixing busses and the master graphic EQ determines the final overall equalization MASTER LEVEL CONTROL H The master level control adjusts the gain of the main mixing buss and determines the level at the main line output jack Q as well as determining the signal level applied to tha input of the graphic equalizer poxer amplifier Itis generally good practice to operate the master level control somewhere in the middle of its operating range to allow maximum flexibility in adlusting overall levels ie it i poor practice to run the individual channel gains way up ard the master control way down since this limits the headroom ol the input stages and could cause cistortion
15. ve heatsink The Inernal power supply consists ofa very large power mains transformer featuring agrain oriented silicon stool core and a high degree of magnetic shielding 10 minimize extraneous hum fields Silicon rectifiers connected in a full wave bridge leed power to large electrolytic fiter banks and provide considerably more music power than the 100 watt RMS power rating would indicate Overall the XR 400 brings professional performance together in an extremely versatile and compact package offering features and specifications formerty avilable only with separate components in a single portable package FRONT PANEL INPUT JACKS A and B Each channel of the XR 400 is equipped with two input jacks which are connected in a unique circuit that allows a wide range of inputs tobe handie When only one microphone is used the A input jack is more sensitive than the B input jack This high end low gain feature enables optimum microphone matching If a high output microphone is overloading the sensitive A input simply reconnect thismike into the lowgain B jack When two inputs are used in each channel the input circuit automatically balances to equalize the gain in both Aand B jacks This simpie but effective switching system gives the user much greater flexibility in choice of input sensitiviies and overload protection CHANNEL CONTROLS Each of the XR 400 s four independent channels contain five controls Gain Monitor
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