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1. Important Safeguards and Precautions All Ampeg products are designed for continuous safe operation as long as common sense is used and steps are taken to help avoid certain problems Abiding by the following rules can help prevent damage to your amplifier yourself and others e The amplifier is equipped with a three pronged AC power cord To reduce the risk of electrical shock NEVER remove or otherwise attempt to defeat the ground pin of the power cord e Connect the amplifier ONLY to a properly grounded AC outlet of the proper voltage for your amp e Avoid sudden temperature extremes rain and moisture Also avoid sudden and intense impact If the unit has been subjected to any of the preceding abuses have it looked at by an authorized service center e NEVER set the amplifier on a support that might give out under its weight e Always keep the total speaker impedance at or above the rated load e Unplug the amplifier before cleaning it NEVER spray liquid cleaners onto the amplifier Wipe it with a slightly dampened lint free cloth to remove dirt and film e Do not use the amplifier if it has sustained damage to the chassis controls or power cord Refer the unit to an authorized service center for inspection e Amplifiers capable of producing high volume levels are also capable of inflicting permanent hearing loss or damage if the exposure to such levels is prolonged Such damage is progressive and irreversible Consider using qualit
2. and the High Frequency Output jack 31 is the high frequency output of the bi amp crossover Preamp Output Jacks 32 8 34 The preamp output signal is available at these jacks Plugging in here will not interrupt the signal to the power amps allowing these outputs to drive additional power amps etc Power Amp Input Jacks 33 amp 35 The Power Amp Input jacks 33 amp 35 are direct inputs to the power amps Plugging in here will interrupt the normal connection of the preamp to the power amp The Power Amp inputs may also be used with the preamp outputs as effects loops In Mono Bridge mode the channel A power amp input 33 will drive both power amps and the channel B power amp input 35 will be automatically disconnected Speaker Jacks 37 42 The SVT 400T contains two separate power amps The power amps may be used independently slave each amp supplying power to its own set of speakers or in Mono Bridge mode both power amps working together to supply double the power to one set of speakers The mode of operation may be selected by pressing or releasing the Slave Mono Bridge switch 36 on the rear panel Each channel is provided with two Ya speaker jacks 37 40 and one set of binding posts 41 amp 42 In Slave mode both power amps working independently any load equal to at least 4 ohms may be connected to each channel If more than one jack is used in any one channel the total
3. these controls can be further expanded by the pull switches Incorporated into several of the tone controls Ultra High 9 and Ultra Low 6 boost frequencies above and below the range of the tone controls These functions may be activated by a gentie pull out on the knob and cancelled by a gentle push in The center point action frequency of the MID control 7 may be shifted between 350Hz and 1 2kHz by the use of the Mid Shift control 8 Note that the Mid shift will not be audible unless the contro is set to a boost or cut position away from the 12 o clock position Line Out Send Level 11 This control adjusts the output level of the Balanced and Unbalanced Line Output jacks un gt a r m ae A 28 amp 29 on the rear panel of the SVT 400T Stage Volume 12 The Stage Volume control 12 is used to set the overall listening level of the SVT 400T The SVT 400T contains power amp limiter circuits which are designed to limit maximum output power to just below the clipping point full undistorted power This limiter circuit can be turned off by gently pulling the Stage Volume contro 12 A limit indicator LED 13 is provided which is lit whenver the limiter is actually limiting the signal Bi Amp Controls 14 amp 15 The SVT 400T contains a bi amp crossover circuit which splits the preamp output signal into high and low frequency outputs 30 amp 31 on the re
4. PIN ON THE POWER CORD OUTPUT POWER RATING TONE CONTROL RESPONSE INPUT IMPEDANCE MAXIMUM INPUT SIGNAL LEVEL ACCEPTED TOTAL SYSTEM GAIN SIGNAL TO NOISE RATIO i POWER REQUIREMENTS SIZE AND WEIGHT TECHNICAL SPECIFICATIONS 200 Watts RMS 5 THD Per Channel 4 ohm foad 120 VAC 400 Watts RMS 5 THD 8 ohm Mono Bridge Load 120 VAC Ultra Low Switch Low Control Mid Shift Controls High Control Ultra High Switch 62 Hz 150 Hz 325 Hz AS r D A 4 17 kHz 5 kHz Odb 220k ohms 15db 57k ohms 22 volts peak to peak 61db w tones flat 2db Boost 0 40 Hz 32dB Range 62 Hz 2248 Range 320 Hz thru 1 2k Hz 8048 Range 5kHz 12db Boost 10kHz barie 24db Range 22dh Range 20db Range 20db Range 22db Range 34db Range Ultra Low and Ultra High oft 75db w tones flat Ultra Low and Ultra High off Export 5A 240vac 50Hz Domestic 10A 120vac 60Hz 17W x 13 D x 5ta H 30 lbs Specifications subject to change without notice We would like to take this opportunity to thank you tor selecting an Ampeg product and to tell you of our commitment to the design and manufacture of only the finest musical instrument amplification equipment built for you the musician You have purchased one of the most innovative sound amplification devices available today Your Ampeg amplifier gives you more
5. performance features than ever before features that you the musician have asked for Your Ampeg amplifier is an American product manufactured at our factory in St Louis Missouri Only the finest available components and materials are used in the manufacture of each amplifier All Ampeg amplifiers are subject to seven or more inspection and testing steps to assure you of a high quality product The final test for each amp is conducted by a trained musician with the instrument the amp was designed for Any unit that does not meet the standards of his discriminating ear will not be passed Since all Ampeg products are designed developed and manufactured through the cooperative efforts of engineers and professional musicians the end result is a product that responds to the musician s audio requirements and a product that will serve your needs tor years to come SLM ELECTRONICS LIMITED WARRANTY SLM Electronics warrants this product to be free of defects in material and workmanship for a period of two 2 years from the original date of purchase to the original purchaser and Is not transferable Speakers tubes and meters carry a six 6 month warranty This warranty is subject to the conditions exclusions and limitations hereinafter set forth Excluded from this warranty are defects caused by wear and tear misuse neglect alterations and modifications or act of nature Such determinations will be made
6. CLEANING AGENTS ONLY CONNECT POWER CORD TO A POLARIZED SAFETY GROUNDED OUTLET WIRED TO CURRENT ELECTRICAL CODES AND COMPATIBLE WITH VOLTAGE POWER AND FREQUENCY REQUIREMENTS STATED ON THE REAR PANEL OF THE APPARATUS PROTECT THE POWER CORD FROM DAMAGE DUE TO BEING WALKED ON PINCHED OR STRAINED UNPLUG THE APPARATUS DURING LIGHTNING STORMS OR WHEN UNUSED FOR LONG PERIODS OF TIME ONLY USE ATTACHMENTS ACCESSORIES STANDS OR BRACKETS SPECIFIED BY THE MANUFACTURER FOR SAFE OPERATION AND TO AVOID INJURY THIS APPARATUS DOES NOT OPERATE NORMALLY AND REQUIRES SERVICE WITH ANY PHYSICAL DAMAGE FROM IMPACT OR ANY EXPOSURE TO MOISTURE SERVICE MUST BE PERFORMED BY QUALIFIED PERSONNEL OUR AMPLIFIERS ARE CAPABLE OF PRODUCING HIGH SOUND PRESSURE LEVELS CONTINUED EXPOSURE TO HIGH SOUND PRESSURE LEVELS CAN CAUSE PERMA NENT HEARING IMPAIRMENT OR LOSS USER CAUTION IS ADVISED AND EAR PROTECTION IS RECOMMENDED IF UNIT IS OPERATED AT HIGH VOLUME EXPLANATION OF GRAPHICAL SYMBOLS DANGEROUS VOLTAGE IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL EXPLICACION DE SIMBOLOS GRAFICOS VOLTAJE PELIGROSO A ES NECESARIO QUE EL USUARIO SE REFIERA AL MANUAL DE INSTRUCCIONES EXPLICATION DES SYMBOLES GRAPHIQUES DANGER HAUTE TENSION REFERREZ VOUS AU MANUAL DUTILISATION ampeg SVT AO0r Front Panel Features and Functions Input Jacks 1 amp 2 Your SVT 400T is equipped with two preamp input jacks
7. The Odb input 1 accepts low to line levelinputs The 15db input 2 is padded to accept hotter inputs such as active type basses Gain 3 The gain control 3 is used to compensate for various input signal levels and playing styles by varying the amount of gain for the preamp A peak indicator LED 4 is provided which is lit at signal levels of 6 db below preamp clipping For the most efficient clean output the gain control should be set such that the peak indicator 4 flashes occasionally Sustain 5 The sustain control provides a compression limiting effect With the sustain control set at 0 no effect will be noticed As the sustain control is turned towards 10 limiting will begin to occur The limiting keeps the signal from going above a given level set by the sustain control The overall volume level will decrease as the sustain control is turned clockwise If more volume is desired at higher settings of the control simply turn up the stage volume control This un limiting effect allows the player to obtain a smooth even sound level with more sustain If even more sustain is desired the gain control may be increased Tone Controls 6 9 The SVT 400T incorporates sophisticated active tone control circuitry in a configuration designed for maximum tonal variation possibilities Four rotary tone controls allow you to boost or cut uencies in the range of 50Hz to 5kHz The range of
8. ar of the unit The Frequency control 14 determines the crossover frequency splitting point of the bi amp outputs The Bi amp Balance control 15 varies the relative levels of the bi amp outputs This allows matching the outputs to power amplifiers with different sensitivities or for adjusting the overall tonal balance The level of the bi amp outputs is adjusted by the stage volume control 12 in conjunction with the Bi amp Balance control 15 Graphic Equalizer Controls 17 23 The SVT 400T contains a switchable six band Graphic Equalizer which may be used to further tailor the overall tone The graphic equalizer may be switched into the circuit by a gentle pull on the Mid Control 7 and switched out by a gentle push of the control This function may also be performed by a remote foot switch by plugging a foot switch into the Ys footswitch jack 10 on the front panel When a footswitch is being used the pull EQ on functon of the Mid Control 7 is defeated The EQ indicator light 16 will be lit whenever the EQ Is switched into the circuit The Level control 23 sets the overall level of the EQ circuit The use of these controls allows you the possibility of remotely switching between two different tone settings and or volume levels as well as the ability to fine tune the tone of the amplifier Power Switch 25 The SVT 400T is turned on by depressing the 1 marked on the Power Switch The po
9. by SLM Electronics Warranty is also void if a The original retail purchase Is not made from an Authorized Ampeg dealer b The serial number affixed to the product is altered defaced or removed All parts costs will be borne by SLM Electronics within the warranty period Labor costs will be covered within the warranty period according to rate schedules established by SLM Electronics Warranty service may be done by SLM Electronics or an SLM Authorized Field Service Center Transportation charges involved in warranty service are the sole responsibility of the purchaser SLM Electronics warrants Speakers to be free from defects inmaterial and workmanship for a period of ninety 90 days from original date of purchase Speaker warranty will be subject to inspection of speaker by SLM Electronics or SLM Authorized Field Service Center Obvious overpowering will result in a warranty denial Realizing Speakers can be overloaded causing failure SLM Electronics will replace the spaker with a speaker of same or equal type ata price one half the then current suggested retail price of the new speaker for life regardless of reason Warranty repairs may be handled by your authorized dealer authorized SLM Service Center or SLM Electronics All units being returned to SLM Electronics must be accompanied by a detailed description as to needed repairs CAUTION To reduce the risk of electric shock do not remove chassis No user s
10. erviceable parts inside Refer all servicing to qualified service personnel To avoid the risk of fire or electric shock do not expose this appliance to rain WARNING This equipment is capable of producing sound pressure levels greater than 110 dB SPL Continued exposure to such high sound pressure levels can cause permanent hearing impairment or loss User caution Is advised and ear protection is recommended a copy of the original sales receipt and an SLM Electronics return authorization SLM Electronics reserves the right to repair or replace this piece of equipment at their option SLM Electronics is not liable for any incidental or consequential damages resulting from any defect or failure of this instrument other than the repair of the SLM Electronics product subject to the terms of this warranty This limited warranty gives you specific legal rights and you may have other tights which vary from state to state This warranty is expressly in lieu of all other agreements and warranties expressed or implied except as may be otherwise required by law
11. load considering both jacks must be at least 4 ohms This means that you may connect one 4 ohm cabinet or up to two 8 ohm cabinets or up to four 16 ohm cabinets etc per channel In Mono Bridge mode any load equal to at least 8 ohms may be connected by bridging the speakers across the two power amps This is done by connecting a speaker lead to each Red binding post and depressing the Mono Bridge switch 36 The binding posts provide a convenient way of connecting speakers to the SVT 400T Each set of binding posts consists of a red and black terminal which accepts bare wire banana plugs spade lugs and certain test probes External Fuse Holder 43 This fuse holder contains a fuse which acts as a safety valve for the SVT 400T If at any time the unit should fail to operate check this fuse If the problems persist after fuse replacement consult an authorized Ampeg service center Polarity Switch 44 Present on Domestic U S A model only If humming or buzzing occurs try different positions of this switch If it makes no difference to the buzzing leave the switch in its center position and check guitar cords etc Power Cord 45 Your SVT 400T is shipped connected for standard 120 volt 60 Hz power Be sure itis plugged into a properly wired grounded three pin power outlet before use CAUTION TO REDUCE THE RISK OF ELECTRICAL SHOCK NEVER BREAK OFF OR OTHERWISE DEFEAT THE GROUND
12. wer indicator LED 24 should be lit when the amp is on O fe Qo BALANCED FAL ANOET Wer SLM ELECTHONCEH JURON AVENE sr LOUIS MO HIS Rear Panel Features and Operation Effects Loop 26 amp 27 Effects Send 26 and Effects Return 27 jacks are provided on the rear panel of the SVT 400T These unbalanced jacks are designed to be used as a pre EQ line level external effects loop The Effects Send jack 26 can be connected to the line level input of an external effect device and the Effect Return jack 27 can be connected to the line level output of an external effect device This post gain configuration is helpful in obtaining optimum input signal levels to external devices and in reducing unwanted noise associated with external effects devices The ef ects send jack may also be used as a direct unbalanced send for recording etc Balanced Line Out 29 and Unbalanced Line Out 28 The Balanced Line Output provides a low impedance balanced output and the Unbalanced Line Output provides a high impedance output for connecting the SVT 400T to an additional power amplifier mixer tape deck etc The output level of these jacks s set by the Line Out Send Level control 11 on the front panel The line out level is independent of the stage volume level Bi Amp Outputs 30 31 The Low Frequency Output jack 30 is the low frequency outputof the bi amp crossover
13. y hearing protection devices CAUTION PRECAUCION ATTENTION RISK OF ELECTRIC SHOCK RIESGO DE CORRIENTAZO RISQUE D ELECTROCUTION DO NOT OPEN NO ABRA NE PAS OUVRIR WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE PRECAUCION PARA REDUCIR EL RIESGO DE INCENDIOS O DESCARGAS ELECTRICAS NO PER ATTENTION PROTEGEZ ET APPAREIL DE LA PLUIE ET DE L HUMIDITE AFIN D EVITER TOUT THIS APPARATUS TO RAIN OR MOISTURE TO REDUCE THE RISK OF ELECTRIC MITA QUE ESTE APARATO QUEDE EXPUESTO A LA LLUVIA O LA HUMEDAD PARA DISMINUOIR EL RISQUE DINCENDIE OU D ELECTROCUTION POUR REDUIRE D ELECTROCUTION NE PAS ENLEVER SHOCK DO NOT REMOVE COVER NO USER SERVICEABLE PARTS INSIDE REFER RIESGO DE CORRIENTAZO NO ABRA LA CUBIERTA NO HAY PIEZAS ADENTRO QUE EL USARIO LE COUVERCLE AUCUNE PIECE INTERNE N EST REPRABLE PAR L UTILISATEUR POUR TOUTE SERVICING TO QUALIFIED SERVICE PERSONNEL PUEDO REPARAR DEJE TODO MANTENIMIENTO A LOS TECHNICOS CALIFICADOS REPARATION S ADRESSER A UN TECHNICIEN QUALIFIE IMPORTANT SAFETY INSTRUCTIONS READ FOLLOW HEED AND KEEP ALL INSTRUCTIONS AND WARNINGS DO NOT OPERATE NEAR ANY HEAT SOURCE AND DO NOT BLOCK ANY VENTILATION OPENINGS ON THIS APPARATUS FOR PROPER OPERATION THIS UNIT REQUIRES 3 75CM OF WELL VENTILATED SPACE AROUND HEATSINKS AND OTHER AIR FLOW PROVISIONS IN THE CABINET DO NOT USE THIS APPARATUS NEAR SPLASHING FALLING SPRAYING OR STANDING LIQUIDS CLEAN ONLY WITH LINT FREE DAMP CLOTH AND DO NOT USE

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