Ampeg_V-4BH_Users_Guide电路图.pdf

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1、Owners Guide for the V4BH Bass Amplifier Made in the U.S.A. by RadioFans.CN 收音机爱 好者资料库 V4BH Bass Amplifier 2 Table of Contents Important Safeguards and Precautions . . . . . . . . . . . . . .2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Features . . . . . . .

2、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . .3 The Front Panel Controls and Their Use . . . . . . . . . . . . .4 The Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Some Suggested Settin

3、gs . . . . . . . . . . . . . . . . . . . . . . . .6 Changing the Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Technical Specifications . . . . . . . . . . . . . . . . . .back cover Important Safeguards a

4、nd 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 prob- lems. Abiding by the following rules can help prevent damage to your amplifier, yourself and others. The amplifier is equipped with a three-pr

5、ong AC power cord. To reduce the risk of electrical shock, NEVER remove or otherwise attempt to defeat the ground pin of the power cord. Connect the amplifier ONLY to a properly grounded AC outlet of the proper voltage for your amp. If no grounded outlet is available, use only an approved method of

6、adapting to a two-prong AC source. 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.) NEVER set the amplifier on a support that might give out

7、 under its weight. Always keep the total impedance at or above the rated load. Unplug the amplifier before cleaning it. NEVER spray liquid cleaners onto the unit. Wipe the unit with a slightly dampened, lint-free cloth to remove dirt and film. Dont use the amplifier if it has sustained damage to the

8、 chassis, controls, or power cord. Refer the unit to an authorized service center for inspection. 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 irreversib

9、le! Caution is advised and ear protection recommended when playing at extremely loud levels. The chart below shows the U.S. Government Occupational Safety and Health Administration (OSHA) regulations which were in effect at the time of this publication for permissible noise exposure, per 29CRF1910,

10、Table G-16. According to OSHA, any exposure in excess of those listed above could result in some hearing loss. SOUND LEVEL dBADURATION PER DAY SLOW RESPONSEIN HOURS 908 926 954 973 1002 SOUND LEVEL dBADURATION PER DAY SLOW RESPONSEIN HOURS 1021-1/2 1051 1101/2 1151/4 or less IMPORTANT SAFETY INSTRUC

11、TIONS 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

12、. DO NOT USE THIS APPARATUS NEAR SPLASHING, FALLING, SPRAYING, OR STANDING LIQUIDS. CLEAN ONLY WITH LINT-FREE DAMP CLOTH AND DO NOT USE CLEANING AGENTS. ONLY CONNECT POWER CORD TO A POLARIZED, SAFETY GROUNDED OUTLET WIRED TO CURRENT ELECTRICAL CODES AND COMPATIBLE WITH VOLTAGE, POWER, AND FREQUENCY

13、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 MANUF

14、ACTURER FOR SAFE OPERATION AND TO AVOID INJURY. WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK OR FIRE, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. SERVICE MUST BE PERFORMED BY QUALIFIED PERSONNEL. OUR AMPLIFIERS ARE CAPABLE OF PRODUCING HIGH SOUND PRESSURE LEVELS. CONTINUED EXPOSURE TO HIGH SOUND P

15、RESSURE 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. WARNING: THIS UNIT REQUIRES A SAFETY GROUNDED OUTLET WIRED TO CURRENT ELECTRIC CODES HAVING THE LINE SUPPLY VOLTAGE, POWER, AND FREQUENCY IDE

16、NTIFIED ON THE REAR OF THE UNIT. THE OUTLET MUST REMAIN ACCESSIBLE TO DISCONNECT THE UNIT IF A FAULT SHOULD ARISE WHILE IN USE. THIS UNIT SHOULD BE UNPLUGGED WHEN NOT IN USE. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATU

17、S TO RAIN OR MOISTURE. TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. PRECAUCION RIESGO DE CORRIENTAZO NO ABRA PRECAUCION: PARA REDUCIR EL RIESGO DE INCENDIOS O DESCARGAS ELECTRICAS, NO PER- MITA QUE ESTE A

18、PARATO QUEDE EXPUESTO A LA LLUVIA O LA HUMEDAD. PARA DISMINUOIR EL RIESGO DE CORRIENTAZO. NO ABRA LA CUBIERTA. NO HAY PIEZAS ADENTRO QUE EL USARIO PUEDO REPARAR DEJE TODO MANTENIMIENTO A LOS TECHNICOS CALIFICADOS. ATTENTION RISQUE DELECTROCUTION NE PAS OUVRIR ATTENTION: PROTGEZ CET APPAREIL DE LA PL

19、UIE ET DE LHUMIDIT AFIN DVITER TOUT RISQUE DINCENDIE OU DLECTROCUTION. POUR REDUIRE DELECTROCUTION NE PAS ENLEVER LE COUVERCLE. AUCUNE PIECE INTERNE NEST REPRABLE PAR LUTILISATEUR. POUR TOUTE REPARATION, SADRESSER A UN TECHNICIEN QUALIFIE. IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MAN

20、UAL “ES NECESARIO QUE EL USUARIO SE REFIERA AL MANUAL DE INSTRUCCIONES.” REFERREZ-VOUS AU MANUAL DUTILISATION EXPLANATION OF GRAPHICAL SYMBOLS: EXPLICACION DE SIMBOLOS GRAFICOS: EXPLICATION DES SYMBLES GRAPHIQUES: DANGEROUS VOLTAGE “VOLTAJE PELIGROSO” DANGER HAUTE TENSION = RadioFans.CN 收音机爱 好者资料库 V

21、4BH Bass Amplifier 3 An Introduction to your new Ampeg V4BH Bass Amplifier The harmonically rich sound and legendary performance of the classic AMPEG SVT are redefined in the V4BH. This dynamically powerful bass amp delivers a thunderous 100 watts of unsurpassed quality, reliability and tonal flexib

22、ility. It also provides the classic vibrance of tubes as well as contemporary features. The features and controls of your V4BH are covered in detail within the pages of this owners guide. We recommend going over them before you use the amplifier. Features In true Ampeg tradition, your new V4BH offer

23、s you more power, performance and flexibility than any other bass ampli- fier in its class. Below are some of the outstanding features of your new amplifier features which set it apart from the competition! Additional information on these features can be found on the pages indicated. -15dB INPUT: Th

24、is feature is perfect for “active” basses (page 4) ULTRA LO AND ULTRA HI SWITCHES: These enable you to tailor your sound in many different ways at the touch of a button (page 4) 5-POSITION FREQUENCY SELECTOR: Take your pick from the five center frequency points to get just the right midrange voice (

25、page 4) SLAVE OUT: Use for powering another amp from the V4BHs preamp (page 5) System Block Diagram 0dB INPUT GAIN ULTRA LO MID FREQUENCY MASTER BUFFER PREAMP OUT PWR AMP INPUT SLAVE OUT BAL OUT SPEAKER OUT EXT. SPEAKER OUT POWER AMP PWR/STDBY LED ULTRA HI -15dB INPUT BASS TREBLE 4 OHMS8 OHMS IMPEDA

26、NCE SPEAKON* JACK 1+ 2+ 1-2- *Speakon is a registered trademark of Neutrik U.S.A. RadioFans.CN 收音机爱 好者资料库 4 The Front Panel Controls and Their Use V4BH Bass Amplifier GainBassMidrangeFrequencyTrebleMasterStandbyPower HiHi LoLo Ultra Hi / LoUltra Hi / Lo 15dB15dB0dB0dB 010 5 4 3 2 19 8 7 6 010 5 4 3

27、2 19 8 7 6 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 5 4 3 1 2 010 5 4 3 2 19 8 7 6 12345678910121113 Standby/ Standby/ Power Power 1. 0dB INPUT: The signal output from an instrument (active or passive typically passive) or a line level signal may be con- nected here by means of

28、 a shielded instru- ment cable. The signal at this jack is sent into the preamp at full strength. 2. -15dB INPUT:The signal output from an instrument (active or passive typically active) or a line level signal may be con- nected here by means of a shielded instru- ment cable. The signal at this jack

29、 is padded 15dB before it is sent into the pre- amp. 3. GAIN: This control adjusts the basic level of signal in the preamp. 4. ULTRA HI: This switch boosts high frequencies. 5. ULTRA LO: This switch, when depressed, provides emphasis to the low frequencies by boosting the low frequencies and selecti

30、vely cutting the mid frequencies. 6. BASS: This is the primary low fre- quency control. It allows for 12dB of cut or boost at 40Hz. 7. MIDRANGE: This is the primary midrange control. It allows for 20dB of cut or 10dB of boost at the center fre- quency selected by the Frequency control (8). 8. FREQUE

31、NCY: Allows you to select the center frequency for the Midrange control (7), giving you a choice of five “voices” for the Midrange. The numbers correspond to the following center fre- quencies as indicated: 1=220Hz, 2=450Hz, 3=800Hz, 4=1.6kHz, 5=3kHz. 9. TREBLE: This is the primary high frequency co

32、ntrol. It allows for 20dB of cut or 15dB of boost at 4kHz. 10. MASTER: This controls the signal level to the power amp and therefore the overall listening level. It also controls the level to the Preamp Out jack (20). 11. STANDBY/POWER LED: This is a dual-function LED. In Standby Mode, it glows red.

33、 In the On mode (when high voltage is applied to the tubes) it glows green. If it does not turn green in the On mode, there is no high voltage present and the unit needs servicing. 12. STANDBY: The Standby mode allows the tubes to warm up or remain warm without high voltage being applied to them. Th

34、is extends tube life. This switch should be OFF when first turning the amplifier on. Allow the unit to warm up for 20 seconds before switching to the ON position. During short periods of non-use, the amp should be put into Standby mode. 13. POWER: This supplies AC power to the unit. Turn this switch

35、 on before turning on the Standby switch (12), as explained above. 5 The Rear Panel V4BH Bass Amplifier 141817161920222115 14. FUSE: This protects the unit from damage due to overload conditions or power line surges. If the fuse blows, replace it only with the same size and type. 15. AC LINE IN: Fir

36、mly insert the sup- plied AC power cord into this socket until it is fully seated. Plug the male end of the cord into a grounded AC outlet. DO NOT DEFEAT THE GROUND PRONG OF THE AC PLUG! 16. PREAMP OUT: This jack carries the post-Master (10) signal. Using this jack does not break the path to the pow

37、er amp. This signal can be used to feed an external power amplifier, mix- ing console or house PA system. 17. POWER AMPIN:This jack accepts a signal to be sent to the power amp and the Slave Out jack (18). Using this jack breaks the path from the signal that was present at the Preamp Out jack (16).

38、This can be used as a post-Master (10) patch point. 18. SLAVE OUT: This jack receives the same signal that is being sent to the power amp. It is useful for power- ing another amp (slave) from this units preamp. It can also be used as an “unbalanced” version of the Balanced Out (19) signal. 19. BALAN

39、CED OUT: This XLR jack is the preamp output. Thus, it will include any processing done in the Preamp Out/Power Amp loop (16,17). This sig- nal can be used to feed an external power amplifier, mixing console or house PA system. 20. PRESENCE SWITCH: When this switch is depressed a high fequency boost

40、is added to the output signal. This helps compensate for a speaker cabinet with no high frequency driver, adding a glassy top end to the sound. 21. SPEAKER OUT: Two 1/4” phone jacks are provided for connecting speakers to the unit. These jacks are wired in parallel. Use the jack on the right (“Main”

41、) first. The jack on the left should only be used to connect a sec- ond speaker cabinet. NOTE: In some areas 1/4” speaker jacks are not acceptable for use on amplifiers with high output power levels. For this reason the 1/4” jacks on your amplifier may be sealed. If this is the case, use the Speakon

42、jack to connect the amplifier to your speaker cabi- net. Use a heavy duty speaker cable termi- nated with the proper connectors. 22. IMPEDANCE SELECTOR: Use this switch to match the output imped- ance of the amp to the speaker(s) being used (4 or 8 ohms). For help in deciding the total impedance of

43、your system, consult the chart below. CabinetNumber ofTotal ImpedanceCabinetsImpedance 4 ohms14 ohms 8 ohms18 ohms 8 ohms24 ohms 16 ohms28 ohms 16 ohms44 ohms Speakonis a registered trademark of Neutrik U.S.A. V4BH Bass Amplifier GainBassMidrangeFrequencyTrebleMaster Hi Lo Ultra Hi / Lo Hi Lo Ultra

44、Hi / Lo 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 5 4 3 1 2 010 5 4 3 2 19 8 7 6 GainBassMidrangeFrequencyTrebleMaster Hi Lo Ultra Hi / Lo Hi Lo Ultra Hi / Lo 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19

45、8 7 6 010 5 4 3 2 19 8 7 6 5 4 3 1 2 010 5 4 3 2 19 8 7 6 GainBassMidrangeFrequencyTrebleMaster Hi Lo Ultra Hi / Lo Hi Lo Ultra Hi / Lo 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 5 4 3 1 2 010 5 4 3 2 19 8 7 6 GainBassMidrangeFrequencyTre

46、bleMaster Hi Lo Ultra Hi / Lo Hi Lo Ultra Hi / Lo 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 010 5 4 3 2 19 8 7 6 5 4 3 1 2 010 5 4 3 2 19 8 7 6 IN IN IN IN 6 Some Suggested Settings FUNK: JAZZ: ROCK: COUNTRY: The setting of the Gain control depends on your p

47、articular instrument. The Master should be set to produce the appropriate output volume level. V4BH Bass Amplifier Changing the Tubes The performance characteristics of tubes are degraded in direct proportion to how often and under what conditions the amplifier is used. Power tubes should be checked

48、 at least once a year - more frequently if you use the amplifier nearly every day. When power tubes wear out, the amplifier will begin to grow weak, lack punch, fade up and down, or lose highs and lows. Power tubes work together in a push/pull configuration and should all be replaced at the same tim

49、e with matched or balanced tubes. Your dealer can recommend the best replacement tubes for your amplifier. Preamp tubes typically last longer than power tubes. When a preamp tube wears out, the amplifier may squeal, get noisy, lose gain and sensitivity, or just quit working. A service center can determine which tube(s) may need replacing. To gain access to the power tubes in the V4BH, the rear panel must be removed. Tube replacement should only be performed by a qualified service person. Turn the amp off, unplug it and let it cool for at least 5 minutes. Remove the screw