Peavey RHYTHM MASTER 400 User's Manual
Contents
1. t0 a Y cord must be used The tip portion of the 1 4 stereo jack serves as the channet send output while the ring portion will return the processedsignal to tne channel The sleeve portion serves as the ground Since this is a stereo jack configuration the first click on the jack may be usec as a preamp output with a meno 1 4 plug if desired This tirst click will not disturb the signal flow to the remainder of the ampas itis fed into the poweramp NOTE IF THE SECOND CLICK OF THE OUT IN JACK IS UTILIZED WITHOUT RETURNING ANY SIGNAL TO THE POWER AMP FROM AN EFFECTS DEVICE THE AMPLIFIER WILL BE DISABLED Of tAn FOOTSWITCH JACK The 1 4 footswitch jack allows ramote switching of the reverb system from the footswitch The footswitch isa simple single function unitthat merely defeats or cancels the internal reverberation capability LINE CORD 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 Ifit isnecess ry to use the amp without proper grounding receptacles a suitable crounding adaptors should be used Extraneous noise and the probability of shock hazard is greatly reduced when the unit is operated with properly grounded receptacles RHYTHM MASTER 400 SPECIFICATIONS REMOTE FOOTSWITCH Function Reverb defeat THE FOLLOWING SPECS MEASURED AT NOMINAL SUMMARY OF FUN2. BE WORN WHEN OPERATING THIS AMPLIFICATION SYSTEM IN ORDER TO PREVENT A BAS AANeNr LEARING COSR IF PxEOS INE IS INEXCESS OF THE LIMITS AS SET FORTHABOVE TO INSURE AGAINST POTENTIALLY DANGEROUS EXPOSURE To HIGH SOUND MMESSURE LEVELS Tr ISRECOMMENDED THAT AL PERSONS EXSOSED TOEOUIPMENT CAPABLE OF PRODUCING HIGH SOUND PRESSURE LEVELS SUCH AS SO Runtin CATION GvSTEM BE PROTECTED BY HEARING POTECTORS WHiCE THIS UNIT IS IN OPERATION CAUTION THIS AMPLIFIER HAS BEEN DESIGNED AND CONSTRUCTED TO PROVIDE ADEQUATE POWER RESERVE FOR PLAYING MODERN MUSIC WHICH MAY REQUIRE DEEASIONAL Bele POWER TO MANDLE OCCASIONAL PEAK POWER ADEQUATE POWER HEADROOM HAS BEEN DESIGNED INTO THIS SISTEM EXTENDEG SREARTON AT ABSOLUTE MAXIMUM POWER LEVELS IS NOT RECOMMENDED SINCE THIS COULD DAMAGE THE ASSOCIATED LOUDSPEAKER SYSTEM PLEASE BE Sian Tint MAXIMUM POWER CAN GE OBTAINED MTH VERY LOW SETTINGS OF THE GAIN CONTROLS IF THE INPLIT SIGNAL IS VERY STRONG Due to our efforts for constant improvement features and specifications listed herein are subject to change without notice Gh PEAVEY ELECTRONICS CORPORATION 711 A Street Meridian MS 39301 U S A 1983 Printed in U S A tonoa 833
3. Each channel of the Rhythm Master 400 has a single nigh impedance input approximately 220K ohms which features extremely wide dynamic range CHANNEL PRE GAIN CONTROLS Each channel features a pre gain control allowing individual volume adjustment for each instrument The pre gain control also features an integral pull switch which addsa significant boost 8 dB tothe high frequencies when activated This high frequency boost gives a nice edge to clean playing styles The boost is activated by pulling out on the pre gain control and defeated by simply pushing the knob inward CHANNEL EQUALIZATION Each channel of the Rhythm Master 400 employs a system of concentric stacked potentiometers consisting of three band active equalization and reverb send controls In each channel there are two sets of concentric potentiometers each serving a dual purpose The inner ring of the first set is the low frequency control while the outer knob is the mid control Likewise the second set of concentric pots are the high frequency control inner knob and reverb send control outer ring LOW FREQUENCY CONTROL The low frequency control is capable of 15 dB boost or cut at 80 Hz The action of this equalization control is conventional and should present no problem in operation Boost is obtained in the right hand clockwise position while cut is obtained in the left hand counterclockwise position The vertical 12 o clock position yields a
4. LI chee se NO eee Designed Input Level 14 dBV 0 2 V RMS 0 1 dB 20 Hz to 20 KHz at 200 W RMS into 4 ohms Switching sterea jack providing patch output to patch TOTAL HARMONIC DISTORTION Input connection when gt used Less than 0 2 100 mW to 200 W AMS 20 Hz to 10 KHz 4 peame ouar FO a ohms typically below 0 1 UnAn PIN AVE post EQ sonal sen Eang pede TK erms or greater DDT DYNAMIC RANGE Nomina Oasu 0 dav TV RUS Maximum Output 18 dBV 8 V RMS DDT MAXIMUM THD Mn ae PRT man AIM FHB et 6 a9 overtone i 05 an Sor THID for 20 Se onions Foneon ign ievel post EQ signal return Impedance High Z 22K ohms HUM AND NOISE Beleren Tape Lever SV V PMS Sitar an 2 68 below rated power Sta ae pra aing preamp output to power amp POWER CONSUMPTION Domestic fant tandeta won Rot use SM Sen Me se ses AMP CAUTIONS EXPOSURE TO EXTREMELY HIGH NOISE LEVELS MAY CAUSE A FEAMANENT HEARING LOSS INDIVIDUALS VARY CONSIDERABLY IN SUSCEPTIBILITY TO NOISE REIES cana LOSE BUT NEARLY EVESYONE WILL LOSE SOME HEARING IF EXPOSED TO SUFFICIENTLY INTENSE NOISE FOR A SUFFICIENT TIME THE US GOVERNMENTS OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION OSHA HAS SPECIFIED THE FOLLOWING PERM SSIBLE NOISE LEVEL EXPOSURES SURATION PER DAY IN HOURS SOUND LEVEL JBA SLOW RESPONSE ACCORDING TO OSHA ANY EXPOSURE IN EXCESS OF THE AROYE PERMISSIBLE LIMITS COULD RESULT IN SOME HEARING LOSS EAR PLUGS OR PROTECTORS IN THE EAR CANALS OA OVER THE EARS MUST
5. flat no boost or cut response and is the position from which all tonal balancing should be started NOTE Overboosting of the low control may cause unwanted distortion at the loudspeaker and or engaging the DDT circuit on a constant basis This problem can be corrected by setting the control flat placing the control at zero or setting the control in the minus out positions MID FREQUENCY CONTROL The mid frequency control is capable of 15 dB boost or cut at 600 Hz with a peak notch type of filter response This middle EQ circuit enables control over the vital mid range frequencies The action of this middle filter is somewhat different than the high and low EQ since it is of the peak and notch type Thiskind of filter response is necessary to avoid undue interaction with the high and low equalizers CAUTION MUST BE EXERCISED IN ORDER TO AVOID OVERBOOSTING OR OVERCUTTING THE MID RANGE Experience has proven that for most applications a vary slight mid range cut tends to producea tight and well defined sound Generally large amounts of mid range boost are extremely unpleasant and probably will never be used except for special effects HIGH FREQUENCY CONTROL The high frequency control is capable of 15 dB boost or cut at 8 KHz The boost or cut action of this control is very similar to the low equalizer with the exception of its high frequency effect Boost is obtained in the right of the center position while cut is obtained in th
6. CTIONS Ai Four channels in twa pre EG patch Channels 1 amp 2 only e G preamp out Pull Bright three band EQ and rovorb sen each channel master reverb and mester level revero FREQUENCY RESPONSE o S Output footswitch 210 watt power amp with DDT Compression Grape ig preame out wi utp one premium 4 ohm 15 Black Widow speaker and 40 2 dB 40 Hz to 20 KHZ PLN oA tee PREAMP HUM amp NOISE PREAMP SECTION aay At chen operational THE FOLLOWING PREAMP SPECS ARE MEASURED S WITH ALL EQ FLAT AT 0 dB PULL BRIGHT OFF IN Channel in preamp out 40 Hz 20 Kitz at 1 V RMS MASTER LEVEL SET AT 10 MASTER REVERB SET AT 0 Less than 05 THD typically below 01 NOMIKAL SIGNAL LEVELS ARE WITH CHANNEL LEVEE EQUALIZATION CONTROLS SET AT S MINIMUM LEVELS ARE WITH POSA at G0 Tie and a Kite Shelving CHANEL LEVEL CONTROLS SET AT 10 TFS dE at e00 Beak hoist INSTRUMENT INPUTS PULL BRIGHT IMpsearee Hian 2220K ohms Poa arahe Nominal Input Level 18 dBV 120 mV RMS POWER AMPLIFIER SECTION Nenin Tipun Covet 46 08 10 ma Als POWER ANPLIFET SECT Maximum Input Level 14 dBV 5 V RMS 210 W RMS into 4 ohms with DDT Compression and LED PRE Fa PATCH OUTPUT Stereo Jack TIP ndentor ee ae POWER ann CLIPPING 090 Imi ANN re Typically at 5 THD 1 KHz 120 VAC Line komina Output 1 BV EA VEMS E 10 PRE EA PATCH INPUT Stereo Jack Ring 1 W RMS ing s ohn Fonction Cow eve alleos return Boe NOT seonmranded ee ares Mg 2
7. WARNING TO PREVENT ELECTRICAL SHOCK OR FIRE HAZARD DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE BEFORE USING THIS APPLIANCE READ BACK COVER FOR FURTHER WARNINGS RHYTHM MASTER 400 OPERATING GUIDE Congratulations on your purchase of the Peavey Rhythm Master 400 This amplifier features four totally independent channels with a 210 watt power amp DDT compression and an efficient 4ohm Black Widow Super Structure 15 speaker combined in a solid 3 4 thick wood cabinet covered with 34 oz heavy duty tolex The preamp has four separate channels each of which features a high gain input pre gain with pull bright three band EQ low mid high and reverb send Channels 1 and 2 also feature pre EQ send and return with allows effects devices to be intertaced before the equalization so maximum coloration may be achieved The master reverb contro affects all four channels and sets the amount of reverb return or overall reverb level The master level control also affects all four channels by setting the overall gain of the amplifier This system has been designed for those who play more than one instrument and need the portability afforded by a single unit package The flexibility achieved with the wide range EQ premium three spring reverb unit and pre EQ patch combined with our rugged 210 watt power amp DDT compression and premium 15 Black Widow speaker should fill a need which has long been unfulfilled CHANNEL INPUTS
8. e left of the center position Flat response is obtained in the center 12 o clock position REVERB SEND CONTROL The send control gets the signal level from each channel which is routed through the internal reverb unit CLOCKWISE ROTATION INCREASES THE AMOUNT OF SEND SIGNAL NOTE EXCESSIVE SEND LEVELS CAN OVERLOAD THE REVERB DRIVE CIRCUITRY AND CAN CAUSE REVERB DISTORTION MASTER REVERB CONTROL The master reverb control determines the desired amountof reverberation from the internal reverb system Clockwise rotation increases the reverb effect and counterclogkwise decreases the effect sors COMERE SHON rn naoa center or zero position You may encounter somesituations when audible hum and or noise will come from the loudspeaker If this situation arises position the ground switch to either positive or negative or or untilthe noise is minimized NOTE Should the noise problem continue consult your authorized Peavey dealer the Poavey factory or a qualified service technician DO NOT UNDER ANY CIRCUMSTANCES REMOVE THE GROUND PIN ON THE MAINS POWER CABLE THE GROUND SWITCH IS NOT FUNCTIONAL ON EXPORT MODELS ON OFF SWITCH The on off power switch is a two postion rocker type and should present no problem in operation In the on position a red LED indicator will illuminate showing that power is being supplied to the unit NOTE When the unit is turned on the DDT compression LED may momentarily illumi
9. nate Although we recommend that the gain controls pre and post gain should be at their zero position before the power switch is turned on the actual lighting of the DDT LED in this instance should be considered normal REAR PANEL PREAMP OUT POWER AMP IN The Rhythm Master 400 features a stereo out in jack to facilitate the use of various auxiliary units chorus flanging tape digital analog dolays equalizers ete in line To utilize this unique system a stereo plug ring tip sleeve to a V cord must be used The tip portion of the 1 4 stereo jack serves as the preamp send output while the ring portion will eturn the processed signal to the power amp The sleeve portion serves as the ground Since this is a stereo jack configuration the first click on the jack may be used as a preamp output with amono 1 4 plug itdesired This first click will not disturb the signal flow to the remainder of the amp asit is fed into the power amp NOTE IF THE SECOND CLICK OF THE OUT IN JACK IS UTILIZED WITHOUT RETURNING ANY SIGNAL TO THE CHANNEL FROM AN EFFECTS DEVICE THE AMPLIFIER WILL BE DISABLED PRE EQ PATCH Channel 1 amp 2 The Rhythm Mester 400 features a stereo out in jack on Channels 1 and 2 to facilitate the use of various auxiliary units chorus flanging tape cigital enalog delays equalizers etc in line To utilize this unique system a stereo plug cing tip sleeve
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