Peavey XR 400 User's Manual
Contents
1. as tending to emphasize residual preamp noise and susceptibility to acoustic feedback Care should be observed when using excessive cut in either frequency range since excessive cutting may degrade the dynamic range capabilities of the input preamp and create poor tonality These channel equalization controls have been provided to achieve tonal balance as well as feedback control in the individual channels for the main mix only All experimentation should begin with these controls set in the flat 0 straight up or 12 00 position Use of the individual channel 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 frequencies will be boosted or cut Boost occurs in the clockwise settings while cut 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 cul Boost occurs in the clockwise settings while cut occurs in the counterclockwise settings Flat response is obtained in the 0 or vertical position 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 The2. overall settings of the channel effects send controls determine the amount 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 is a post type adjustment which is located in the circuit after the channel gain and equalization controls The user should be aware that 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 rnaster 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 the input of the graphic equalizer power amplifier Itis generally good practice to operate the master level control somewhere in the middle of its operating range to allow maximum flexibility in adjusting overall levels i e it is poor practice to run the individual channe gains way up and the master control way down since this l
3. AMIC RANGE 3 V RMS Jack A 6 V RMS Jack B MAXIMUM GAIN 56 dB with channel Gain full CW 70 dB with channel Gain and Main Level full CW INPUT IMPEDANCE 220K ohms Jack A 44K ohms Jack B Master 12 00 All EQ flat 20 Hz 20 kHz unweighted 1 channel Gain 12 00 shorted input 84 dB 1 channel Gain 12 00 22K ohms source 82 dB All channel Gains 12 00 22K ohms source 78 dB CHANNEL EQUALIZATION 15 dB 80 Hz amp 8 kHz Shelving Characteristic MASTER GRAPHIC EQUALIZATION 15 dB 100 Hz 350 Hz 1 kHz 3 kHz and 8 kHz Peak Notch Characteristic Average Q of 1 5 TOTAL SYSTEM FREQUENCY RESPONSE 2 dB 60 Hz 25 kHz All EQ flat LINE OUTPUTS Main Monitor and Effects MAXIMUM OUTPUT 8 V RMS into 10K ohms 18 dBV or 4 V RMS into 600 ohms 14 dBM RATED POWER 100 W RMS into 4 ohms load POWER CLIPPING 1 THD 1 kHz 120 V VAC line Typically 80 W RMS into 8 ohms 120 W RMS into 4 ohms 2 ohm load not recommended FREQUENCY RESPONSE 0 1 dB 30 Hz 30 kHz 100 W RMS into 4 ohms TOTAL HARMONIC DISTORTION Less than 0 2 100 mW to 100 W RMS 50 Hz 10 KHz 4 ohms Typically below 0 1 INTERMODULATION DISTORTION Less than 0 2 100 mW to 100 W RMS 60 Hz amp 5 kHz 4 ohms Typically below 0 1 MONITOR TO MONITOR BUSS MON AMP GAIN TYPICAL OF 4 CHANNELS EFFECTS GAIN MASTER LO HI crane i im gt Ny i MAIN OUT 5 BAND GRAPHIC MAIN BUSS guy MO
4. GNED AND CONSTRUCTED TO PROVIDE ADEQUATE POWER RESERVE FOR PLAYING MODERN MUSIC WHICH MAY REQUIRE OCCASIONAL PEAK POWER TO HANDLE OCCASIONAL PEAK POWER ADEQUATE POWER HEADROOM HAS BEEN DESIGNED INTO THIS SYSTEM EXTENDED OPERATION AT ABSOLUTE MAXIMUM POWER LEVELS IS NOT RECOMMENDED SINCE THIS COULD DAMAGE THE ASSOCIATED LOUDSPEAKER SYSTEM PLEASE BE AWARE THAT MAXIMUM POWER CAN BE OBTAINED WITH VERY LOW SETTINGS OF THE GAIN CONTROLS IF THE INPUT SIGNAL IS VERY STRONG Read all safety and operating instructions before 8 using this product Connect only to a power supply of the type 13 marked on the unit adjacent to the power supply All safety and operating instructions should be cord retained for future reference Obey all cautions in the operating instructions and on the back of the unit All operating instructions should be followed This product should not be used near water i e a bathtub sink swimming pool wet basement etc This product should be located so thatits position does not interfere with its proper ventilation It should not be placed flat against a wall or placed in a built in enclosure that will impede the tlow of cooling air This product should not be placed near a source of heat such as astove heater radiator or another heat producing amplitier Never break off the ground pin on the power supply cord For more information on grounding write for our free booklet Shock Hazard and Grounding Power sup
5. NITOR SUM MONITOR OUT Z gt A Nee T S WHO MONITOR BUSS EFFECTS OUT ll REVERB RETURN SUM EFFECTS BUSS REVERB DRIVE GAIN REVERB UNIT DANGER TO MAIN BUSS V TO EFFECTS BUSS POWER AMP SPKA OUT yoo TO MAIN BUSS q REV FOOTSWITCH TO MAIN MIX BUSS EXPOSURE TO EXTREMELY HIGH NOISE LEVELS MAY CAUSE A PERMANENT HEARING LOSS INDIVIDUALS VARY CONSIDERABLY IN SUSCEPTIBILITY TO NOISE INDUCED HEARING LOSS BUT NEARLY EVERYONE WILL LOSE SOME HEARING IF EXPOSED TO SUFFICIENTLY INTENSE NOISE FOR A SUFFICIENT TIME THE U S GOVERNMENT S OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION OSHA HAS SPECIFIED THE FOLLOWING PERMISSIBLE NOISE LEVEL EXPOSURES DURATION PER DAY IN HOURS 4 or less SOUND LEVEL dBA SLOW RESPONSE 90 92 95 97 100 102 105 110 115 ACCORDING TO OSHA ANY EXPOSURE IN EXCESS OF THE ABOVE PERMISSIBLE LIMITS COULO RESULT IN SOME HEARING LOSS EAR PLUGS OR 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 SOUND PRESSURE LEVELS IT IS RECOMMENDED THAT ALL PERSONS EXPOSED TO EQUIPMENT CAPABLE OF PRODUCING HIGH SOUND PRESSURE LEVELS SUCH AS THIS AMPLIFICATION SYSTEM BE PROTECTED BY HEARING PROTECTORS WHILE THIS UNIT IS IN OPERATION CAUTION THIS AMPLIFIER HAS BEEN DESI
6. R 400 several different modes of operation 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 from the monitor output to the graphic input using a short shielded patch cable When this patch is accomplished the signal from the main mixing buss is available only at the output jack P on the patch panel 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 are no 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 correct an acoustically bad room mike speaker arrangement or completely correct the response curve of a poor loudspeaker Please make sure that the power amplifier has adequate headroom to handle any boost that may be incurred If you boost 100 Hz by 3 dB your power requirement will double As an example if your norma performing lev
7. Teer MIR AD 0 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 found only in separate mixer equalizer power amp components into a single compact and rugged package The design of the XR 400 utilizes the latest advances in semiconductor technology and the overall circuitry has been 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 effort 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 effects send on each channel Master level controls are provided for the main monitor and reverb return A full five band graphic equalizer has been built into the system and utilizes the most contemporary active filler circuitry available Additional flexibility is provided by the 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 amplifier of the XR 400 utilizes four high voltage high speed TO 3 power devices bolt
8. ary to use the amp in a two pin plug system without proper grounding facilities suitable grounding adaptors should be used Much less noise and greatly reduced shock hazard exists when the unit is operated with the proper grounded receptacles SPEAKER OUTPUTS V The speaker output jacks are of the standard type Both the output 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 to drive loads both above and below the recommended 4 ohm impedance Extreme care should be used when operating a unit at below 4 ohms since lower load impedances 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 panel heatsink SIGNAL TO NOISE RATIO POWER AMP SPECIFICATIONS XR 400 SPECIFICATIONS CHANNELS 4 INPUTS 8 High Z 4 being high gain 4 being padded 6 dB Graphic input Auxiliary input SENSITIVITY Master Channel Gain Vertical 12 00 setting All EQ flat 150 mV into High Gain Input for 100 W RMS speaker output into 4 ohms 42 dB Gain MAXIMUM DYN
9. ed to a massive heatsink The internal power supply consists of a very large power mains transformer featuring a grain oriented silicon steel core and a high degree of magnetic shielding to minimize extraneous hum fields Silicon rectifiers connected in a full wave bridge feed power to large electrolytic filter 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 formerly available 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 to be handled When only one microphone is used the A input jack is more sensitive than the B input jack This high and low gain feature enables optimum microphone matching If a high output microphone is overloading the sensitive A input simply reconnect this mike into the low gain B jack When two inputs are used in each channel the input circuit automatically balances to equalize the gain in both A and B jacks This simple but effective switching system gives the user much greater flexibility in choice of input sensitivities and overload protection CHANNEL CONTROLS Each of the XR 400 s four independent channels contain five controls Ga
10. el requires 100 watts the power required after a 3dB equalization boost will be 200 watts You should always begin operation with the equalizers in the 0 or center position It is wise to avoid excessive cutting of large segments of the audio passband since this tends to reduce the dynamic range of the system Also it is better to raise the level control rather than to use the majority of the equalizers in the boost position since overall signal to noise ratio will result As with any equalizer device careful experimentation and a little common sense will yield the desired result PILOT LED L The pilot LED indicates when the electrical supply is switched on and is actually delivering power to the amplifier XR 400 PATCH PANEL The patch panel of the XR 400 has been designed to allow use of auxiliary accessories mixers power amps etc in Conjunction with this unit FOOTSWITCH JACK M The footswitch jack provides an input to accommodate the optional remote reverb cutoif pedal This footswitch jack is conventional and should present no operational problems AUXILIARY INPUT N The auxiliary input provides access to the main mixing buss for patching in signals from external devices such as delay lines or extra mixing channels lts 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
11. he graphic input provides much greater flexibility in allowing the interna graphic power amp to be utilized as a monitor amp or for any other purpose the user may deem necessary Its 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 that the fuse be replaced with the proper type and value if it should fail in order to avoid damage to the equipment and to prevent voiding the warranty If your unit repeatedly blows fuses it should be taken to a qualified service center for 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 will 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 It is not advisable to remove the ground pin under any circumstances l it is necess
12. imits the headroom of the input stages and could cause distortion JOGOO AA AT OOOO 00 00 00 00 O9OOOO OOOE 000000 MASTER MONITOR LEVEL CONTROL 1 The master monitor control adjusts the gain of the monitor mixing buss and determines the level of the signal available from the monitor output jack P The operation of this control and its independent channel sends is identical to that of the main with the exception that its output is applied to the monitor line output jack instead of the main output jack MASTER REVERB RETURN CONTROL J The master reverb control determines the amount of delayed signal reverberation that is mixed back into the main mix buss The action of this control J is defeated by use of a remote switch being plugged into the footswitch jack M located on the patch panel Itis important to note that no reverberation will occur unless the internal delay line is being fed signal from the channel effects send controls The master reverb return control does not affect the level available from the effects output jack located on the patch panel O GRAPHIC EQUALIZER K The five band equalizer is of the latest active type and exhibits performance comparable to that found in the finest commercial equipment The graphic equalizer is located in the circuit just before the internal 100 watt power amplifier and provides a very versatile and professional equalization of the overall system Because of the flexibility built into the X
13. in Monitor Effects and High and Low Equalization CHANNEL GAIN CONTROL C The channel gain control varies the gain of the input preamplifier Thisinput preamp is designed around a 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 is a totally independent leve adjustment used for deriving the proper monitor mix It is important that the user be aware that this channel monitor send is totally independent from all other channel controls and feeds directly into the monitor buss whose output is determined by the master monitor contro 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 controls are extremely effective and will allow the user to achieve almost any blend of high s and low s with proper adjustment Since these EQ controls are capable of a 30 dB range care should be taken to properly utilize their capabilities Excessive boosting of low s can cause muffled or boomy sounds as well as tending to prematurely overload the power amp because of excessive low frequency power requirements Overboosting the high s will tend to cause a strident or screechy tonality as well
14. line leve devices Caution should be observed when using accessory devices with the relatively high output signal level available from the effects out Overall signa level is determined by the setting 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 MONITOR OUTPUT P The monitor output provides a signal for an external monitor system and is of relatively low output impedance capable of over 4 volts into 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 Q The main output provides output from the main mixing buss This output is of relatively low impedance and is capable of over 4 volts RMS into 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 thal normally picks up the signal from the main output jack Q When a plug is inserted into the graphic input the circuit path is broken and this input may now be plugged into other devices or any of the output jacks of the XR 400 T
15. ply cords should always be handled carefully Never walk or place equipment on power supply cords Periodically check cords for cuts or signs of stress especially at the plug and the point where the cord exits the unit The power supply cord should be unplugged when the unit is to be unused for long periods of time Metal parts can be cleaned with a damp rag The vinyl covering used on some units can be cleaned with a damp rag or an ammonia based household cleaner if necessary LG PEAVEY ELECTRONICS CORP 711 A Street Meridian MS 39301 U S A Care should be taken so that objects do not fall and liquids are not spilled into the unit through the ventilation holes or any other openings This unit should be checked by a qualified service technician if A The power supply cord or plug has been damaged B Anything has fallen or been spilled into the unit C The unit does not operate correctly D The unit has been dropped or the enclosure damaged The user should not attempt to service this equipment All service work should be done by a qualified service technician Due to our efforts for constant improvement specifications are subject to change without notice 1983 Printed in U S A 10 83 80322005
Download Pdf Manuals
Related Search