SVT-4 PRO
Contents
1. 5 MMdS Block Diagram N 9 315 l ONOW T ONOW V LH9IM NE 5123443 t M 9 1431 AdWy 5193443 YIMOd O3M31S _ IB ONOW GN3S SL944434 HOLIMSLOOJd SSVdAH SSVdAG SSVdA8 6 23443 ONOW 15 1504 030315 1 odis ONOW3OGHS M N LO JTL TIT _ 100 INIT 3431 Wd e y ON ONOI V 1N0 INIT 1 TvaNN 1yg MO1 A PN T a 1504 1nO H IH TV8 Wd AON3IO3MJ e 7 uw g 1 IVAN VIVA 74431 HONYAGIN X HOLIMSLOOd J183Ml SSvg NOISS3MdWOO 310W d e NI 03 NIVO 1 P 1 NOISS3NdWO2 HOLIMSLOOS FOVIS NIYO E ino YINNL l1H9lM8 INOM4 VALIN VMLTO ag YINNL MV3d O LP zmaja azap SNA PRO Bass Guitar Amplifier SVT 4 PRO Technical Specifications Output Power Rating 2 x 900 watts rms 2 ohms 600 watts continuous 2 x 625 watts rms 4 ohms 490 watts continuous 2 x 350 watts rms 8 ohms 300 watts continuous Signal to Noise Ratio Compression Ratio Maximum Gain Tube Complement Tone Controls Graphic EQ Level Graphic EQ Range Bright Switch Ultra Hi Switch Ultra Lo Switch Footswitch Jack Power Requirements2. The Rear Panel 5 LOOP ZE e BAL RETURN RETURN SEND TUNER OUTPUT OUTPUT BAL PRE BAL UNBAL LEFT B X RIGHT A MONO Emme 00000 A _ di HE RISK OF FIRE 1 HOT 1 5 1 HOT 1 RETURNI 1 HOT 1 5 SC ES T m S A 1 O LOTES PE AND RATING SVT iv PRO M ga i 4 5 5 Aan AA AT TEINITIUIN UTILISER UN FUSIBLE DE vr 2 p AVIS ve cHoc execrmaue Nepas ouar RECHANGE SERIAL S f INI I P L POWER POWER mono snbce il qum If eevee f POWERAMPA FOOTSWITCH PREAMP EFFECTS OUTPUT BYPASS 2 OHMS MINIMUM LOAD PER IHANNEL 728 29 30 31 32 33 34 35 36 37 28 CIRCUIT BREAKER The SVT 4 PRO POWER AMP A employs an AC line circuit breaker to 350W rms 8 ohms help protect against damages due to 625W rms 4 ohms excessive current demands If the 925W rms 2 ohms amplifier stops working check the POWER AMP B circuit breaker 350W rms 8 ohms NOTE When the circuit breaker opens the 625W rms 4 ohms button will be protruding and showing a 925W rms 2 ohms contrasting color You may reset the circuit breaker by pushing it in until it latches The breaker must cool down for a short time before the button will latch If the circuit breaker opens repeatedly with no signal input have the amplifier checked by a qualified service person Each powe
3. 1 RETURNI 1 HOT 1 4 5 n A CAUTION A SAME 1Yi PI I I 38 SVT IV PRO 4 N 6 A ox ATTENTION uriuiser UN FUSIBLE DE 1 e P AVIS nepasoume RECHANGE SERIAL 4 4 I S POWER FOOTSWITCH POWER MONO BRIDGE POWER poweRAMP PREAMP POWERAMP preamp EFFECTS GRAPHIC EG PREAMP EFFECTS OUTPUT BYPASS 2 OHMS MINIMUM LOAD PER IHANNEL 728 29 30 34 2 33 34 35 36 37 31 STEREO MONO BRIDGE SWITCH from LOUD Technologies Inc Be sure to ask This switch sets the operating mode of for model AFP1 the amplifier In the out position the 37 GRAPHIC EQ MUTE amplifier is in Stereo Mode with the FOOTSWITCH Connect a dual switch In the Am position the amplifier footswitch to this jack for remote Mute is in Mono Bridged Mode and EQ On Off control On the stereo 32 34 POWER AMP IN These jacks 1 4 plug the tip controls Mute and connect directly to the internal power the ring controls EQ On Off The EQ amp for use with external preamps footswitch overrides the front panel When using external sources connect switch and the Mute function is the OUTPUT of the sources to these available from either location Jacks using shielded instrument cables to feed the signals into the power amp sections The internal signal is NOTE A footswitch may be purchased at your local Ampeg Deale
4. NO SOUND POOR SOUND Check bass cables POOR SOUND Check speaker s SPEAKER S OK POOR SOUND LEDs LIGHT LEDs DON T LIGHT Check AC outlet OUTLET OK NO POWER Check amp s power Check house fusebox cord circuit breaker or circuit breaker power switch Check amp controls check for signal from bass SPEAKER S DEFECTIVE Replace speaker s POOR SOUND Check speaker touch tip of cable SEE BELOW SEE BELOW If the problem isn t covered above or if the steps lead you here then contact your Ampeg dealer for service information Also you should refer the amp for servicing if it gets dropped has liquid spilled into it or sustains damage to its power cord Service Information If you are having a problem with your SVT 4 PRO you can go to our website www ampeg com and click on Support for service information or call Technical Support at 1 800 898 3211 Monday Friday during normal business hours Pacific Time to receive assistance If you are outside of the U S contact your local distributor for technical support and service The SVT 4 PRO is covered with sheet metal and aluminum not unlike robots spaceships and other cool things Clean with a dry lint free cloth Never spray cleaning agents on the SVT 4 PRO Avoid abrasive cleansers which would damage the finish Ampeg continually develops new products and improves upon existing ones For this reason the speci
5. OSHA any exposure in excess of these per missible limits could result in some hearing loss To ensure 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 use hearing protectors while the equipment is in operation Ear plugs or protectors in the ear canals or over the ears must be worn when operating the equip ment in order to prevent permanent hearing loss if exposure is in excess of the limits set forth here Duration per Sound Typical Example day in hours Level dBA Slow Response Duo in small club Subway Train 3 0 25 or less Very loud classical music The boss screaming at his minions about manual deadlines c NIN n 115 Loudest parts at a rock concert NE PAS UTILISER PROCHE D UNE SOURCE DE CHALEUR ET NE PAS BLOQUER OU OBSTRUER LE SYSTEME DE VENTILATION SUR CET APPAREIL POUR UNE UTILISATION CONFORME CET APPAREIL NECESSITE ENVIRON 7CM D ESPACE BIEN VENTILE AUTOUR DE SON SYSTEME DE REFROIDISSEMENT AINSI QU UN COURANT D AIR FRAIS CONSTANT NE PAS UTILISER CET APPAREIL PROCHE D UNE SOURCE LIQUIDE NETTOYER SEULEMENT A L AIDE D UN CHIFFON DOUX ET SEC ET NE PAS UTILISER DE PRODUITS MENAGERS CONNECTER UNIQUEMENT LE CABLE D ALIMENTATION FOURNI SUR UNE PRISE AVEC MISE A LA TERRE ET COMPATIBLE AVEC LA TENSION L INTENSITE ET LA FREQUENCE REQUISES INDIQUEES SUR LA FACE ARRIE
6. ULTRA HI A BRIGHT BYPASS 300Hz FLAT 1kHz LO ULTRA LO GRAPHIC LIMIT EQ DEFEAT CROSSOVER COMPRESSION MIDRANGE FREQUENCY TREBLE LINE OUT LEVEL MASTER FREQUENCY BALANCE EFFECTS ULTRA HI te BRIGHT BYPASS 300Hz FLAT 1kHz LO ULTRA LO GRAPHIC LIMIT EO DEFEAT CROSSOVER COMPRESSION MIDRANGE FREQUENCY TREBLE LINE OUT LEVEL MASTER FREQUENCY BALANCE 12 EFFECTS ULTRA HI BRIGHT BYPASS 300Hz FLAT TkHz LO ULTRA LO GRAPHIC LIMIT EQ DEFEAT CHOSSOVER 15 O APor zga SVA PRO Bass Guitar Amplifier Rack Mounting When mounting the SVT 4 PRO into a rack the four bottom feet should be removed to maintain the three rack space height of the amplifier Be sure to keep the feet and their attachment bolts for future use If the feet are reinstalled never use screws which will protrude farther into the amplifier than the original hardware The rack must be a high quality enclosure capable of securely supporting the weight of the amplifier Tighten the mounting screws securely through the amplifier s face plate into the rack rails Check the rack and mounting screws occasionally to ensure a continually safe and secure installation Thermal Considerations The amplifier is fan cooled with one large fan Air is drawn through the rear panel vent to cool down the amplifier heatsink
7. e BAL RETURN RETURN SEND TUNER OUTPUT OUTPUT BAL PRE BAL UNBAL LEFT B X RIGHT A MONO Emme 00000 A _ di HE RISK OF FIRE HOT 1 1 HOT 1 RETURNI 1 1 4 5 SC ES T m S A 1 O LOTES PE AND RATING SVT iv PRO M ga i 4 5 5 Aan AA AT TEINITIUIN UTILISER UN FUSIBLE DE vr 2 p AVIS ve cHoc execrmaue Nepas ouar RECHANGE SERIAL S f INI I P L POWER POWER mono snbce il qum If eevee f POWERAMPA FOOTSWITCH AMP B MP EFFECTS OUTPUT BYPASS 2 OHMS MINIMUM LOAD PER IHANNEL 728 29 30 34 32 33 34 35 36 37 41 LINE OUT STEREO MONO SWITCH Post EO and is controlled and This switch is active only when the modified by the tone controls Pre Post switch 431 is in the post Graphic EO the Master level control the position engaged When active this effects loop and the Line Out Stereo switch governs the signals at the Line Mono switch Out jacks as follows 45 EFFECTS LOOP RETURN LEFT B Stereo Mode switch out When using stereo effects connect the e The Channel A line out jacks 43 44 effect s left channel output into this jack supply a signal from the Effects Do not use this jack with mono effects Loop Return Right A jack 46 46 EFFECTS LOOP RETURN RIGHT A e The Channel B line out jacks 39 40 us ds supply a signal from the Effec
8. 18 Domestic Export Mono Bridged 1600 watts rms 4 ohms 1200 watts continuous 396 THD Mono Bridged 1200 watts rms 8 ohms 900 watts continuous 396 THD 85 dB 3 3 THD THD THD 10 1 2 dB change in output for 20 dB change in input 50 mV to 500 mVI 68 dB 1 kHz tone controls centered bridged output 12AX7 3 Bass 12 12 dB 50 Hz Midrange 15 15 dB 220 Hz 450 Hz 800 Hz 1 6 kHz or 3 kHz Treble 14 19 dB 5 kHz 10 10 dB 33 Hz 4 15 15 dB 80Hz 8 8dB 150 Hz 8 8 dB 300 Hz 8 8 dB 600 Hz 8 8dB 900 Hz 8 8 dB 2 kHz 8 8 dB 5 kHz 9 9 dB 8 kHz 10 10 dB 6 dB 2 kHz 6 dB 5 kHz 2 5 dB 50 Hz 12 dB 560 Hz 1 5 dB 5 kHz Effects Bypass mono Graphic EQ On Off Mute On Off Tip Mute Ring EQ 100 120 VAC 50 60 Hz 1 4 kVA 1 4 kW 200 240 VAC 50 60 Hz 1 4 kVA 1 4 kW O Mr zga mage SVA PRO Bass Guitar Amplifier SVT 4 PRO Technical Specifications continued Size H x W x D 5 6in 142 mm with feet x 19 0 in 483 mm with ears 17 4 in 442 mm without ears x 15 5 in 394 mm Weight 39 5 Ib 17 9 kg approximately Troubleshooting In the unlikely event that your SVT 4 PRO should malfunction take a few minutes to troubleshoot it before you call for service You can save yourself time and money by doing it yourself and often the cure for the problem is something quite simple
9. 9VT 4 PRO Bass Guitar Amplifier COMPRESSION MIDRANGE ULTRA HI ULTRALO 10 FHEQUENCY TREBLE 12345 GRAPHIC EQ LINE OUT LEVEL EFFECTS BYPASS 10 LIMIT FHEQUENCY BALANCI 300Hz FLAT 9 6 50Hz TkHz LO CROSSOVER Owner s Manual O Hf zmija SNA PRO Bass Guitar Amplifier TABLE OF CONTENTS Important Safety Instructions Introduction Features Hook up Diagrams The Front Panel The Rear Panel Suggested Settings Personal Settings Rack Mounting Thermal Considerations Block Diagram Technical Specifications Troubleshooting Service Information IMPORTANT SAFETY INSTRUCTIONS Read these instructions Keep these instructions Heed all warnings Follow all instructions Do not use this apparatus near water Clean only with a dry cloth OF BB C PY rn Do not block any ventilation openings Install in accordance with the manufacturer s instructions 8 Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat 9 Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outle
10. B cut at 500 Hz O Mr nm mage SVA PRO Bass Guitar Amplifier The Front Panel continued 10 BASS Use this to adjust the low 11 12 13 14 frequency level of the amplifier This provides up to 12 dB of boost or 12 dB of cut at 50 Hz The low frequency output is flat at the center position MIDRANGE Use this to adjust the midrange frequency level of the amplifier This provides up to 15 dB of boost or 15 dB of cut at the center frequency selected by the frequency control 12 The midrange frequency output is flat at the center position Rotate the control counter clockwise for a contoured sound more distant less midrange output or clockwise for a sound which really cuts through FREQUENCY This control allows you to select the center frequency for the midrange control 11 giving you a choice of five voices for the midrange The numbers correspond to the following center frequencies 12220 Hz 2 450 Hz 32800 Hz 421 6 kHz 523 kHz TREBLE Use this to adjust the high frequency level of the amplifier This provides up to 14 dB of boost or 19 dB of cut at 5 kHz The high frequency output is flat at the center position BRIGHT When this switch is engaged a more lively top end response 46 dB at 2 kHz is added to the input signal 16 17 18 19 20 GRAPHIC EQ When this switch is engaged the 9 band graphic EQ is enabled A footswitch overrides this switch LINE OU
11. CY 12345 9 FREOUENCY 12345 Setting 6 Downright Upright Done Right BASS MIDRANGE ULTRA HI OUT OUT ULTRA LO FREQUENCY 12345 TREBLE a O 10 BRIGHT OUT OUT GRAPHIC EQ TREBLE O 10 TREBLE o 10 TREBLE 10 OUT GRAPHIC TREBLE a 10 TREBLE OUT GRAPHIC ej SVT 4 PRO Bass Guitar Amplifier Personal Settings A note about the Graphic EQ The Graphic EQ may be used in two ways 1 To fine tune the sound make small adjustments at the desired frequencies and leave the EQ on throughout the entire session This is great for adapting to varying room acoustics when playing multiple venues and 2 For a completely different sound make larger adjustments and only activate the EQ when a second channel sound is required such as during bass solos COMPHESSION MIDRANGE FREQUENCY TREBLE LINE OUT LEVEL MASTER FREQUENCY BALANCE 12345 EFFECTS ULTRA HI BRIGHT BYPASS 300Hz FLAT TkHz LO ULTRA LO GRAPHIC LIMIT EQ DEFEAT CROSSOVER COMPRESSION MIDRANGE FREQUENCY TREBLE LINE OUT LEVEL MASTER FREQUENCY BALANCE EFFECTS ULTRA HI DA bis BRIGHT BYPASS 300Hz FLAT TkHz LO ULTRA LO GRAPHIC LIMIT EQ DEFEAT CROSSOVER COMPRESSION MIDRANGE FREQUENCY TREBLE LINE OUT LEVEL MASTER FREQUENCY BALANCE 12345 EFFECTS
12. MAINS plug or an appliance coupler is used as the disconnect device so the disconnect device shall remain readily operable 19 For the terminals marked with symbol of 4 may be of sufficient magnitude to constitute a risk of electric shock The external wiring connected to the terminals requires installation by an instructed person or the used of ready made leads or cords CAUTION AVIS RISK OF ELECTRIC SHOCK DO NOT OPEN RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER OR BACK NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL ATTENTION POUR EVITER LES RISQUES DE CHOC ELECTRIQUE NE PAS ENLEVER LE COUVERCLE AUCUN ENTRETIEN DE PIECES INTERIEURES PAR L USAGER CONFIER L ENTRETIEN AU PERSONNEL QUALIFIE AVIS POUR EVITER LES RISQUES D INCENDIE OU D ELECTROCUTION N EXPOSEZ PAS CET ARTICLE A LA PLUIE OU A L HUMIDITE The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons Le symbole clair avec point de fl che l int rieur d un triangle quilat ral est utilis pour alerter l utilisateur de la pr sence l int rieur du coffret de voltage dangereux non isol d ampleur suffisante pour constituer un risque d l ctrocuti
13. RE DE L APPAREIL S ASSURER DE NE PAS MARCHER PLIER OU TIRER SUR LE CABLE D ALIMENTATION DEBRANCHER L APPAREIL LORS D UNE TEMPETE OU LORS D UNE TRES LONGUE PERIODE DE NON UTILISATION UTILISER UNIQUEMENT DES ACCESSOIRES SPECIFIES PAR LE FABRICANT POUR UNE UTILISATION EN TOUTE SECURITE ET POUR EVITER DES BLESSURES ATTENTION AFIN DE PREVENIR TOUT RISQUE DE CHOCS ELECTRIQUES OU DE DEBUT D INCENDIE NE PAS EXPOSER CET APPAREIL A LA PLUIE ET A L HUMIDITE TOUT ENTRETIEN DOIT ETRE FAIT PAR UN TECHNICIEN QUALIFIE NOS AMPLIFICATEURS PEUVENT PRODUIRE DE TRES HAUTES PRESSIONS ACOUSTIQUES QUI PEUVENT CAUSER DES DOMMAGES AUDITIFS PERMANENTS OU L UTILISER AVEC UNE GRANDE PRECAUTION EST CONSEILLE ET DES PROTECTIONS AUDITIVES SONT RECOMMANDEES POUR UNE UTILISATION A FORT ATTENTION CET APPAREIL REQUIERT UNE PRISE MURALE AVEC MISE A LA TERRE AUX NORMES ACTUELLES ET COMPATIBLE AVEC LES SPECIFICATIONS ELECTRIQUES SE TROUVANT EN FACE ARRIERE DE L APPAREIL LA PRISE ELECTRIQUE DOIT RESTER ACCESSIBLE POUR DEBRANCHER L APPAREIL EN CAS DE DEFAUT PENDANT L UTILISATION CET APPAREIL DOIT ETRE DEBRANCHE SI IL N EST PAS UTILISE Elimination correcte du produit Ce symbole indique que ce produit ne doit pas tre limin avec les ordures m nag res comme le pr voiT la directive WEEE 2002 96 EC et votre loi nationale Ce produit doit tre remis un site de recyclage des d chets lectriques et des quipements lectroniques EEE Un m
14. Return Left B jack Connect a shielded cable from the right output of the processor to the SVT 4 PRO s Effects Return Right A jack Now connect a speaker cable from the SVT 4 PRO s Power Amp A Speaker Output jack to the input jack s of the stage left speakers Finally connect a speaker cable from the SVT 4 PRO s Power Amp B Speaker Output jack to the input jack s of the stage right speakers Note For Speakon connectors pin 1 pin 1 Full SVT 4 PRO f 7 prelim 394 9 A 9 3 g Range Cabinets Bi amp Full Range Lows In this example the SVT 4 PRO s two internal power amplifiers will power both a full range cabinet and a low freguency cabinet The crossover point for the low freguency cabinet is determined by the Crossover Frequency control 21 Disengage the Stereo Mono Bridge switch Stereo position Connect a shielded cable from the SVT 4 PRO s Bramp Low Out jack to its Power Amp A Power Amp In jack Next connect a speaker cable from the SVT 4 PRO s Power Amp A Speaker Output jack to the input jack of the low frequency cabinet s Finally connect a speaker cable from the SVT 4 PRO s Power Amp B Speaker Output jack to the input jack of the full range cabinet s 6 SVT 4 PRO Bass Guitar Amplifier Hook up Diagrams continued SVT 4 PRO Bi amp Highs Lows Full Range Cabinet s In this example the SVT 4 PRO s two internal power amplifiers will power both a high freque
15. T LEVEL This controls the strength of the signal at the line out Jacks 40 41 44 45 EFFECTS BYPASS When this switch is engaged the effects loop is bypassed A footswitch overrides this switch LIMIT DEFEAT The SVT 4 PRO employs internal limiter circuits to help keep the power amplifier s output clean at extreme volume levels All amplifier s may begin to clip their output signals as they approach maximum output levels resulting in potentially speaker damaging distortion These circuits may be defeated by engaging this switch which may result in an increase in output power but with the possibility of distortion Use discretion whenever playing with the limit circuits defeated MASTER Use this to control the overall output level Use it wisely and turn it down when making connections or trying something new LIMIT LED This LED will flash any time the internal limit circuit is called upon to keep the amplifier s output signal clean This indicates that the amplifier is nearing full output and the limiter is keeping it from clipping the output signal 9 O Mr SNA PRO Bass Guitar Amplifier The Front Panel continued 21 CROSSOVER FREQUENCY This sets the crossover point between the High and Bi amp Low outputs when using the amplifier in bi amp mode see Hook up Diagrams pages 5 7 22 CROSSOVER BALANCE This adjusts the relative level between the low and high frequency bi amp s
16. auvais recyclage de ce type de d chet peut avoir de possibles impacts n gatifs sur l environnement et la sant humaine dus aux manations de substances Dans un m me temps votre coop ration un recyclage correct de ce produit contribuera la bonne utilisation des ressources naturelles Pour connaitre l endroit o il est possible de recycler ces quipements merci de contacter votre mairie les services de recyclages ou le service des d chets m nagers Correct disposal of this product This symbol indicates that this product should not be disposed of with your household waste according to the WEEE directive 2012 19 EU and your national law This product should be handed over to an authorized collection site for recycling waste electrical and electronic equipment EEE Improper handling of this type of waste could have a possible negative impact on the environment and human health due to potentially hazardous substances that are generally associated with EEE At the same time your cooperation in the correct disposal of this product will contribute to the effective usage of natural resources For more information about where you can drop off your waste equipment for recycling please contact your local city office waste authority or your household waste disposal service O Momm sm SVA PRO Bass Guitar Amplifier Introduction Congratulations You are now the proud owner of an Ampeg SVT 4 PRO bass guitar amplifier This
17. ctronics or high output pickups Use this pad if you notice that the peak LED 6 comes on regularly It will reduce the chance of overdriving the preamplifier stage and allow more usable range and fine adjustment of the gain control 8 GAIN This varies the amount of signal driving the preamplifier If a small clockwise rotation from minimum leads to overloading and the peak LED 6 illuminating try engaging the 15 dB pad 4 This will give more usable range with the gain control PEAK LED This red warning LED will come on if the input signal is too high the gain control 5 is set too high or there is too much boost from the bass 10 midrange 11 and treble 13 controls If it comes on regularly even when these controls are low try engaging the 15 dB pad 4 COMPRESSION This controls the amount of signal compression At the fully counterclockwise position there is no compression at the fully clockwise position the compression ratio is 10 1 The sonic effect of compression is reduced dynamics increased sustain and a more consistent output level regardless of how light or hard the strings are played The compressor is very transparent that is there is very little effect on the tone of your instrument ULTRA This switch when engaged enhances the amount of high frequency output by 6 dB at 5 kHz ULTRA LO This switch when engaged enhances the amount of low end output by 2 dB at 40 Hz and 10 d
18. ds An independent level control allows you to adjust the Graphic EQ volume page 10 e TUNER OUT JACKS Two jacks one on the front panel one on the rear panel allows connection to an electronic tuner and provides an always live monitor feed even when the output is muted pages 8 13 e SPEAKON JACKS For more reliable connections at higher outputs and for mono bridged connections in addition to 1 4 speaker out jacks page 11 e TRANSFORMER BALANCED LINE OUTPUTS Independent level control Two trans former balanced XLR and two balanced unbalanced 1 4 output jacks switchable stereo or mono one wet one dry signal pre or post EQ page 12 e STEREO EFFECTS LOOP Connect effects here for increased intensity and quieter operation page 13 e POWER AMP IN AND PREAMP OUT Two separate loops one for each channel a separate preamp may be connected to the Power Amp In jack and the Preamp Out jack may be connected to a slave amp page 12 e FOOTSWITCH CONTROL Use a footswitch to bypass activate the Effects Loop and to activate the Graphic EQ and the Mute feature page 12 e CIRCUIT BREAKER PROTECTION A heavy duty resettable circuit breaker provides protection against fault conditions page 11 SVT 4 PRO Bass Guitar Amplifier Hook up Diagrams Full Range Cabinet s SVT 4 PRO Mono Bridged In this example the SVT 4 PRO s two internal power amplifiers are bridged together to produce maxi
19. fications and information in this manual are subject to change without notice Ampeg is a registered trademark of LOUD Technologies Inc All other brand names mentioned are trademarks or registered trademarks of their respective holders and are hereby acknowledged www ampeg com 2014 LOUD Technologies Inc 16220 Wood Red Road NE Woodinville WA 98072 19 Part SW0915 Rev C 05 14 099 A TVe 1oitilqmA 107100 HANSFORMER BALANCED LINE OUTPUT EFFECTS LOOP CHANNEL A STEREO WET MONO MONO ox RETURN SEND LEFT B RIGHT A MONO MONO OUTPUT OUTPUT 1 1 RETURN 4 CAUTION To REDUCE THE RISK OF FIRE REPLACE FUSE WITH SAME TYPE AND RATING ATTENTION UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE 7 SVT IV PRO POWER POWER FOOTSWITCH POWER AMP POWER EFFECTS GRAPHIC EG INPUT OUTPUT INPUT OUTPUT BYPASS MUTE AC LINE IN SPEAKER OUTPUTS 1600 WATTS 4 OHMS M NO BRIDGE 2 OHMS MINIMUM LOAD PER HANNEL IsunsM
20. fier s heatsinks in the IN position the signal is 13 O Mr rm SNA PRO Bass Guitar Amplifier Su Since so many variables affect the actual sound of any system the following settings are offered as starting points to help you find the exact sounds your playing demands When using the SVT 4 PRO please keep in mind the following points e Gain control should be adjusted until the peak LED flashes on strong signals This level will vary depending on the instrument and playing style e The Compressor control may be adjusted to control the dynamic response of the instrument Adjust it according to your preference e Graphic EQ may be used to further fine tune these basic suggested settings to extend the frequency response of the cabinet being used to compensate for room acoustics or to act as a second channel 14 ested Settings Setting 1 Classic Ampeg BASS an 0 10 10 Setting 2 Funky Thing MIDRANGE ULTRA HI OUT OUT ULTRA LO MIDRANGE ULTRA HI ULTRA LO Setting 3 Ethereal Fretless BASS SN 0 10 0 10 Setting 4 Jaco MIDRANGE ULTRA HI OUT OUT ULTRA LO BASS o 10 O 10 Setting 5 R amp B Groove MIDRANGE ULTRA HI OUT OUT ULTRA LO BASS O 10 10 MIDRANGE ULTRA HI OUT OUT ULTRA LO FREQUENCY 12345 FREOUENCY 12345 m FREQUENCY 12345 A FREQUEN
21. ignals when using the amplifier in the b amp mode 23 9 BAND GRAPHIC EQ These sliders control the output frequencies indicated above each control The center position of each control is flat no boost or cut The Graphic EQ may be used in two ways 1 To fine tune the sound make small adjustments at the desired frequencies and leave the EQ on throughout the entire session This is great for adapting to varying room acoustics when playing multiple venues and 2 For a completely different sound make larger adjustments and only activate the EQ when a second channel sound is required such as during bass solos 10 25 26 27 LEVEL This slider is the output volume control for the Graphic EQ and only affects the signal when the EQ is engaged If the EQ d signal is too soft slide the level control up if it s too loud Slide this control down POWER LED This LED illuminates green when the power switch 27 is up ACTIVE LED This LED illuminates when the Graphic EQ switch 15 is engaged POWER SWITCH Use this switch to turn the overall system power on or off Press the top of the switch to turn on the power Press the bottom of this switch to put the amp into standby mode It will not function but the circuits are still live To remove AC power either turn off the AC mains supply or unplug the power cord from the speaker and the AC mains supply O Mr n rm mag SVA PRO Bass Guitar Amplifier
22. mum output power Engage the Stereo Mono Bridge switch Mono Bridge position Connect a heavy duty speaker cable terminated with a Speakon connector pin 1 pin 1 from the SVT 4 PRO s Mono Bridge Output jack to the input jack of a speaker cabinet capable of handling the extremely high output power Note Be absolutely certain that the cabinet s are able to handle the extremely high output power of the amp in this mode Full Range alle Cabinets SVT 4 PRO Dual Mono In this example the SVT 4 PRO s two internal power amplifiers will each power a set of full range cabinets Disengage the Stereo Mono Bridge switch Stereo position Connect a speaker cable from the SVT 4 PRO s Power Amp A Speaker Output jack to the input jack s of a set of full range speakers Next connect a speaker cable from the SVT 4 PRO s Power Amp B Speaker Output jack to the input jack s of another set of full range speakers Hook up Diagrams continued Stereo Effects Procesor Stage Stage Left Right Cabinet s Cabinet s In this example the SVT 4 PRO s two internal power amplifiers will each power a set of full range cabinets in stereo Disengage the Stereo Mono Bridge switch Stereo position Connect a shielded cable from the Effects Send of the SVT 4 PRO to the input of a stereo effects processor Next connect a shielded cable from the left output of the processor to the SVT 4 PRO s Effects
23. ncy cabinet and a low frequency cabinet The crossover point for the cabinets is determined by the Crossover Frequency control 21 Disengage the Stereo Mono Bridge switch Stereo position Connect a shielded cable from the SVT 4 PRO s Br amp High Output jack to its Power Amp B Power Amp In jack Connect a shielded cable from the SVT 4 PRO s Bi amp Low Output jack to its Power Amp A Power Amp In jack Next connect a speaker cable from the SVT 4 PRO s Power Amp A Speaker Output jack to the input jack of the low frequency cabinet s Finally connect a speaker cable from the SVT 4 PRO s Power Amp B Speaker Output jack to the input jack of the high frequency cabinet s SVT 4 PRO Bi amp with a Second Amp Full DV ur BRIDGE ET Range IN Cabinet s ERIAL 5000128 In this example the SVT 4 PRO s two internal power amplifiers are bridged together and will power the low frequency cabinet s A second amplifier will be used to power the high frequency cabinet s The crossover point for the cabinets is determined by the Crossover Frequency control 21 Engage the Stereo Mono Bridge switch Mono Bridge position Connect a shielded cable from the SVT 4 PRO s Bi amp High Output jack to the input jack of the High Frequency power amplifier Connect a shielded cable from the SVT 4 PRO s Bi amp Low Output jack to its Power Amp A Mono Bridge Input jack Next connect the high frequency power amp s Speaker Output jack to the in
24. on The exclamation point within an equilateral triangle is intended to alert the user of the presence of important operating and maintenance servicing instructions in the literature accompanying the appliance Le point d exclamation l int rieur d un triangle quilat ral est employ pour alerter les utilisateurs de la pr sence d instructions importantes pour le fonctionnement et l entretien service dans le livret d instruction accompagnant l appareil WARNING To reduce the risk of fire or electric shock do not expose this apparatus to rain or moisture NOTE This eguipment has been tested and found to comply with the limits for a Class B digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This eguipment generates uses and can radiate radio freguency energy and if not installed and used in accordance with the instruc tions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interfer ence to radio or television reception which can be determined 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 or relocate the receiving antenna Increase the separation between the eq
25. put jack s of the high frequency cabinet s Observe the amplifier s minimum load rating Finally connect a heavy duty speaker cable terminated with a Speakon connector pin 1 1 from the SVT 4 PRO s Mono Bridge Output jack to the input jack of the low frequency speaker cabinet 7 O Mr SNA PRO Bass Guitar Amplifier The Front Panel INPUT The signal output from an instrument active or passive may be connected to this 1 4 input by means of a shielded instrument cable TUNER OUT This jack supplies the only live output when the mute switch 3 is engaged This allows for silent tuning through an electronic tuner or killing the house send with a monitor mixer send still active In addition this jack may also be used as a dB input when not connected to a tuner MUTE Press this switch in to mute all outputs except the tuner outs 2 49 The footswitch may also control mut ing if the mute switch 3 on the front panel is left in the out position The front panel switch is still active with the footswitch connected This is excellent for tuning your bass with an electric tuner without having to adjust any levels to turn down the sound The peak LED 6 will illuminate when this switch is engaged 15 dB Press this switch in to reduce the input signal by 15 dB and compensate for higher output sources This attenuation is suited for use with basses that have active ele
26. r amp is capable of achieving the power output ratings listed above per side individually you may use either side individually or both simultaneously Both power amp A and power amp B provide the choice of utilizing dual 1 4 TS outputs or a single Speakon 29 IEC POWER INPUT CONNECTOR output per side 1 1 u Is where connect the supplied When using the 1 4 TS outputs use POWE GONI only speaker cables with 1 4 TS ends DO NOT DEFEAT THE GROUND PRONG to make the connections Do not use OF THE AC PLUG instrument cables as they may overheat 30 SPEAKER OUTPUTS We recommend using the Speakon jacks MONO BRIDGE whenever playing at full output levels 1200W rms 8 ohms Make sure the total speaker impedance 1600W rms 4 ohms load is 2 ohms or greater This single Speakon output is for For example you could connect utilizing the full power output potential of the amplifier power amp A summed with power amp B for a single mono send Two 8 ohm speakers a 4 ohm load Stereo Mono operation is described on or one 2 ohm speaker the next page 31 Two 16 ohm speakers an 8 ohm load Speakon is a registered trademark of Neutrik AG 11 O DP ova pee age __SVT 4 PRO Bass Guitar Amplifier The Rear Panel continued EFFECT5 LOOP ZE ECL BAL RETURN RETURN SEND TUNER OUTPUT OUTPUT BAL PRE BAL UNBAL LEFT B X RIGHT A MONO Lob een ee E T HOT 1 4 1
27. r or ordered directly from LOUD Technologies Inc Be sure to ask disconnected when a plug is inserted In the Mono Mode Channel A Input TOE TOGEL UR In the Bi amp Mode Channel A Low or order model AFP3 which may be used frequency Input Channel B High for FX EQ and Mute frequency Input 38 BI AMP HIGH LOW OUTPUTS When 33 35 PREAMP OUT These jacks are used in the bramp mode the Bramp direct post master preamp outputs for High Out jack connects to the high use with external power amps mixers frequency power amplifier and the external effects etc Connect the Bi amp Low Out jack connects to the low external amp s input to these jacks frequency power amp See pages 5 7 using a shielded instrument cable 39 40 43 44 TRANSFORMER 36 EFFECTS BYPASS FOOTSWITCH BALANCED LINE OUTPUTS These Connect a single button footswitch jacks supply a balanced signal for to this jack for remote control of the connecting to a house mixing board Effects Loops The footswitch overrides recording console or external amplifiers the front panel Effects Bypass switch The signal level at these jacks is controlled by the front panel Line Out NOTE A footswitch may be purchased at Level control 16 and is governed by your local Ampeg Dealer or ordered directly the Stereo Mono switch 41 and the Pre Post switch 42 12 O Mr zga mage SVA PRO Bass Guitar Amplifier The Rear Panel continued 5 LOOP ZE
28. s and then expelled through the side panel vents When installing be sure to allow sufficient air space around the front sides and rear of the amplifier for adequate cooling for the heatsinks Leave at least one rack space above and below and at least six inches behind and in front of the chassis to allow proper ventilation The rear of the rack should be unobstructed and placed no closer than 10 from walls or other large obstructions When the amplifier is first turned on the fan runs at a low speed As the power output increases and the amp warms up the fan gradually increases in speed to provide additional cooling If the amplifier should overheat a thermal switch turns off the power amplifier allowing the heatsink to cool down Once the amplifier has cooled to a safe operating temperature the thermal switch resets and reactivates the amplifier If this should occur identify the cause of the problem and take corrective action For example Provide better ventilation nstall a fan in the rack to move more air e Make sure the amplifier is not overloaded with too low of a load impedance or by a short circuit on the speaker line 16 SVT 4 PRO Bass Guitar Amplifier a ino 8 NOXV3dS Mi H3MOd a 1 pada ONOW g NOMVAdS 100 2 AdS t ONOW V ONOW V NI dNV 43MOd v Movr v NOMV3dS 1no
29. t consult an electrician for replacement of the obsolete outlet 10 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 11 Only use attachments accessories specified by the manufacturer 12 Use only with a cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoid injury from tip over PORTABLE CART WARNING 13 Unplug this apparatus during lightning storms or when unused for long periods of time 14 Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as 2 power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped 15 Do not overload wall outlets and extension cords as this can result in a risk of fire or electric shock 16 This apparatus shall not be exposed to dripping or splashing and no object filled with liquids such as vases or beer glasses shall be placed on the apparatus 17 This apparatus has been designed with Class l construction and must be connected to a mains socket outlet with a protective earthing connection the third grounding prong 18 The
30. ts connect t e effects rig t channel output Loop Return Left B jack 45 into this jack When using mono effects connect the effect s output into this jack MONO MOCE SWIECA M 47 EFFECTS LOOP SEND When using e The Channel A line out jacks 143 44 an external signal processor connect supply a wet mono preamp signal the INPUT of the effect to this jack any external effects are applied using a shielded instrument cable to to this signal The Effects Loop send the post EQ signal to the effect Left and Right returns 45 46 are for processing The effects loop may be summed together creating a mono bypassed by the front panel switch or by effects signal the use of a footswitch e The Channel B line out jacks 139 40 48 TUNER OUT This jack is provided for supply a dry mono preamp signal connection to an electronic tuner and is no external effects are applied always live even when the Mute switch to this signal 3 is engaged This allows for silent 42 POST EQ PRE EQ The signal at tuning as well as a monitor feed which the line out jacks can be set to either stays hot even when the house mix is Pre EQ or Post EQ with this switch muted With the switch in the OUT position OTHER Make sure that the ventilation the signal at the jacks is Pre EQ This openings are not obscured in any way This is a direct output not affected by any will allow the flow of cooling air to the power EQ or boost settings With the switch ampli
31. uipment and the receiver Connect the equipment into an outlet a circuit different from that to which the receiver is connected Consult the dealer or experienced radio TV technician for help CAUTION Changes or modifications to this device not expressly approved by LOUD Technologies Inc could void the user s authority to operate the eguipment under FCC rules This apparatus does not exceed the Class A Class B whichever is applicable limits for radio noise emissions from digital appara tus as set out in the radio interference regulations of the Canadian Department of Communications CONSIGNES DE SECURITE IMPORTANTES LIRE SUIVRE TOUTES LES INSTRUCTIONS ET LES PRECAUTIONS D UTILISATION ATTENTION Le pr sent appareil num rique n met pas de bruits radio lectriques d passant las limites applicables aux appa reils num riques de class A de class B selon le cas prescrites dans le r glement sur le brouillage radio lectrique dict par les ministere des communications du Canada Exposure to extremely high noise levels may cause 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 period of time The U S Government s Occupational Safety and Health Administration OSHA has specified the permissible noise level exposures shown in the following chart According to
32. versatile and powerful bass amplifier delivers up to 1600 watts of unsurpassed guality offering the classic vibrance of tubes as well as contemporary features The SVT 4 PRO amplifier is an ideal companion to the Classic Series Pro Series or PF cabinets available separately Like all Ampeg products your SVT 4 PRO amplifier is designed by musicians and built using only the best of components Each amplifier is tested to confirm that it meets our specifications and we believe that this amplifier is the absolute best that it can be In order to get the most out of your new amplifier please read this manual before you begin playing Best of luck in all of your musical endeavors Sincerely The dedicated team at Ampeg Features DUAL SEPARATE POWER AMPLIFIERS Operate in true stereo or mono bridged mode for even greater output power pages 5 6 12 e BI AMP CAPABLE Adjustable crossover frequency control and low to high frequency balance control allow you to fine tune the br amp abilities of the amplifier pages 6 7 10 5 POSITION MIDRANGE SELECTOR Take your pick from the five center frequency points available to get just the right midrange voicing page 9 e COMPRESSION CONTROL Allows you to control the dynamics of the tonal response characteristics from the power amp from punch to compressed page 8 9 BAND GRAPHIC EQ Use as a second channel for bass solos or to shape the sound to your own exacting standar
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