Ampeg_B-4R_Users_Guide电路图.pdf

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1、Owners Guide for the B4R Bass Amplifier Made in the U.S.A. by RadioFans.CN 收音机爱 好者资料库 2 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 ru

2、les can help prevent damage to your amplifier, yourself and others. 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. Connect the amplifier ONLY to a properly grounded AC

3、 outlet of the proper voltage for your amp. 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

4、 give out under its weight. Whenever using tall or stacked speaker cabinets, use them ONLY on a level surface. NEVER set tall or stacked cabinets on a surface with more than a five degree incline since tipping or falling could occur, possibly causing seri- ous injuries. Always keep the total speaker

5、 impedance at or above the rated load. 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. Dont use the amplifier if it has sustained damage to the chassis, controls, or power cord. Refer

6、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 irreversible! CAUTION RISK OF ELECTRIC SHOCK DO NOT

7、 OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. ATTENTION RISQUE DELECTROCUTION NE PAS OUVRIR ATTENTION: POUR REDUIRE DELECTROCUTION NE PAS ENLEVER LE COUVERCLE. AUCUNE PIECE INTERNE NEST REPR

8、ABLE PAR LUTILISATEUR. POUR TOUTE REPARATION, SADRESSER A UN TECHNICIEN QUALIFIE. VORSICHT ELEKTRISCHE SCHLAGGEFAHR NICHT OFFENEN VORSICHT: ZUR MINIMIERUNG ELEKTRISCHER SCHLAGGEFAHR NICHT DEN DECKEL ABENHMEN. INTERNE TEILE KONNEN NICHT VOM BENUTZER GEWARTET WERDEN. DIE WARTUNG IS QUALIFIZIERTEM WART

9、UNGSPERSONAL ZU UBERLASSEN. THIS EQUIPMENT HAS BEEN DESIGNED AND ENGINEERED TO PROVIDE SAFE AND RELIABLE OPERATION. IN ORDER TO PROLONG THE LIFE OF THE UNIT AND PREVENT ACCIDEN- TAL DAMAGES OR INJURY, PLEASE FOLLOW THESE PRECAUTIONARY GUIDELINES: WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT

10、 OPEN CHASSIS; DO NOT DEFEAT OR REMOVE THE GROUND PIN OF THE POWER CORD; CONNECT ONLY TO A PROP- ERLY GROUNDED AC POWER OUTLET. CAUTION: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. CAUTION: NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALI

11、FIED SERVICE PERSONNEL. CAUTION: OUR AMPLIFIERS ARE CAPABLE OF PRODUCING HIGH SOUND PRESSURE LEVELS. CONTINUED EXPOSURE TO HIGH SOUND PRESSURE LEVELS CAN CAUSE PERMANENT HEARING IMPAIRMENT OR LOSS. USER CAUTION IS ADVISED AND EAR PROTECTION IS RECOMMENDED IF UNIT IS OPERATED AT HIGH VOLUME. The char

12、t 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, Table G-16. According to OSHA, any exposure in excess of those listed above could result in some hear

13、ing loss. IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL REFERREZ-VOUS AU MANUAL DUTILISATION UNBEDINGT IN DER BEDIENUNGSANLEITUNG NACHSCHLAGEN EXPLANATION OF GRAPHICAL SYMBOLS: DANGEROUS VOLTAGE DANGER HAUTE TENSION GEFAHLICHE SPANNUNG = SOUND LEVEL dBADURATION PER DAY SLOW RESPONS

14、EIN HOURS 908 926 954 973 1002 SOUND LEVEL dBADURATION PER DAY SLOW RESPONSEIN HOURS 1021-1/2 1051 1101/2 1151/4 or less TABLE OF CONTENTS Important Safeguards and Precautions . . . . . . . . . . . . . . .2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Feature

15、s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 The Front Panel Controls and Their Use . . . . . . . . . . . . .4,5 The Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6,7 Connections:Mono Bridged . . . . . . . . . . . . . . . . . . . . . .8 Dua

16、l Mono . . . . . . . . . . . . . . . . . . . . . . . . .8 Biamp, Full Range and Lows . . . . . . . . . . .8 Biamp, Highs and Lows . . . . . . . . . . . . . . .9 Biamp With Second Amplifier . . . . . . . . . . .9 Some Suggested Settings . . . . . . . . . . . . . . . . . . . . . . . .10 Rack Mounting

17、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . .11 Technical Specifications . . . . . . . . . . . . . . . . . . .back cover B4R

18、Bass Amplifier RadioFans.CN 收音机爱 好者资料库 3 An Introduction to your new Ampeg B4R Bass Amplifier Thank you for making one of the best choices you will ever make for your musical career choosing one of the finest bass amps available, the Ampeg B4R. This versatile and powerful bass amplifier delivers up

19、to 1350 watts of unsurpassed musical power, and offers several outstanding features. All of the features and controls of your B4R are covered in detail within the pages of this owners guide. We recommend going over them before you use the amplifier. Features In the world of high performance bass amp

20、s, Ampeg amplifiers stand alone. In true Ampeg tradition, the B4R offers you more power, performance and flexibility than any other bass amplifier in its class. The out- standing features of your new amplifier, features which set it apart from the competition, are listed below. DUAL SEPARATE POWER A

21、MPLIFIERS: Operate in true stereo or mono bridged mode for even greater output power (page 6,8,9). BIAMP CAPABLE: Adjustable crossover frequency control. Low-to-high frequency balance control (page 5,8,9). 5-POSITION STYLE CONTROL: Take your pick from five different tone variations to best suit your

22、 playing style (page 4). TEXTURE CONTROL: Changes your tone for a more aggressive sound (page 4). 9-BAND GRAPHIC EQ: Switchable at front panel or with a footswitch, you can use this as a “second channel” for bass solos, or to shape your sound to your own exact- ing standards. An independent level co

23、ntrol lets you adjust the Graphic EQ volume. (page 5). EFFECTS MIX: Varies the amount of external effects mixed into the signal (page 4,5). TUNER OUT JACK: Allows connection to an electronic tuner and provides an “always live” monitor feed even when the output is muted (page 7). HEAVY-DUTY SPEAKER J

24、ACKS: For more reliable connections at higher outputs and for mono bridged connections: dual binding posts (domestic units) or Speakon jacks (export units) (page 6,7). BALANCED AND UNBALANCED LINE OUTPUTS: Independent level control. Balanced XLR and unbalanced 1/4” output jacks. Switchable pre or po

25、st EQ (page 7). EFFECTS LOOP: Connect your effects here for increased intensity and quieter oper- ation (page 7). POWER AMP IN/PREAMP OUT: Two separate loops, one for each channel: a sepa- rate preamp may be connected to the Power Amp In jack, and the Preamp Out jack may be connected to a slave amp

26、(page 6,7). FOOTSWITCH CONTROL: Use a footswitch to activate the Graphic EQ and the Mute feature (page 6,7). CIRCUIT BREAKER PROTECTION: A heavy duty resettable circuit breaker provides protection against fault conditions (page 6). Speakonis a registered trademark of Neutrik AG. B4R Bass Amplifier R

27、adioFans.CN 收音机爱 好者资料库 4 The Front Panel Controls and Their Use -15dB0dB GAININPUTBASSSTYLEULTRA MID TEXTURE MUTE PEAK 33Hz80Hz150Hz300Hz600Hz900Hz 0 +12dB -12dB 126758934 18 1. 0dB INPUT: The signal output from an instrument (active or passive typically passive) or a line level signal may be connec

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

29、nal at this jack is padded 15dB before it is sent into the preamp. 3. MUTE: This switch, when depressed, mutes all outputs except the Tuner Out (#41). A footswitch can also control muting if the Mute switch on the front panel is left in the “out” position. (The front panel switch is still active wit

30、h a footswitch connected.) This is excellent for tuning your bass with an electronic tuner without having to adjust any levels or turn down your house volume. 4. TEXTURE: This switch adds a “tube emulation” stage which changes the tone for a more aggressive sound. Using the Texture switch, you can o

31、verdrive the amplifier without typical (and harsh-sounding) solid state clipping. 5. GAIN: This control sets the level of the signal entering the preamp stage. Adjust this control until the Peak LED (#6) flashes on strong signal peaks (but is not illuminated con- stantly while playing). To obtain th

32、e best signal to noise ratio, set the Gain control as described above and adjust the Master (#14) to obtain the desired volume level. 6. PEAK LED: This LED will illuminate when the signal entering the preamp stage is near the clipping level. Adjust the Gain control (#5) until a strong signal from yo

33、ur instru- ment causes this LED to flicker. 7. STYLE: This five-position switch allows you to vary the tone of the amplifier. The following table lists each of the dif- ferent settings experiment with the Style and other EQ con- trols (#8,9,10,18,19) for the results which suit you best. POSITION 1:

34、Fully “scooped” mids (mid cut) POSITION 2: Traditional passive tone setting POSITION 3: Basically flat POSITION 4: Boosted high end POSITION 5: Basically flat with low end roll off for loud playing without “muddiness” 8. BASS: This is the primary low frequency control which allows 12dB of cut or boo

35、st at 50Hz. The low frequency out- put is flat at the center position. 9. ULTRA MID: This is the primary midrange control which allows 7dB of cut at 400Hz or boost at 800Hz. The midrange output is flat at the center position. 10. TREBLE: This is the primary high frequency control which allows 18dB o

36、f cut or boost at 5kHz. The high fre- quency output is flat at the center position. 11. EFFECTS MIX: This control varies the mix between the direct (dry) signal and the effects (wet) when the effects loop (#39,40) is used. Full counterclockwise results in all direct signal (no effect) and full clock

37、wise gives all effect and no direct signal. The clockwise position is equivalent to a series effects loop and should be used with such devices as limiters and equalizers. B4R Bass Amplifier 5 The Front Panel Controls and Their Use Cont. 12. GRAPHIC EQ: This switch activates the graphic equaliz- er.

38、When a footswitch is used, this switch is disabled. 13. LIMIT DEFEAT: The B4R employs internal limiter circuits to help keep the power amplifiers output clean at extreme volume levels. (All amplifiers may begin to clip their output signals as they approach maximum output levels, resulting in potenti

39、ally speaker-damaging distortion.) These circuits may be disabled by depressing this switch. This may result in an increase in output power, but also increases the possibility of distortion. Use discretion whenever playing with the Limit cir- cuits off. 14. MASTER: This control sets the overall outp

40、ut level of the amplifier. For the lowest possible noise level, adjust the Gain control as described in #5 and use this control to obtain the desired volume level. 15. LIMIT LED: This LED will flash any time the internal limit circuit is called upon to keep the amplifiers output signal clean. This i

41、ndicates that the amplifier is nearing full output and the limiter is keeping it from clipping the output signal. 16. FREQUENCY:This control sets the crossover point between the Biamp High and Biamp Low Outputs when using the amplifier in the biamp mode. 17. BALANCE: This control adjusts the relativ

42、e level between the low and high frequency biamp signals when using the amplifier in the biamp mode. 18. 9-BAND GRAPHIC EQ: These sliders control the ampli- tude of the frequencies indicated above each control. The center position of each control is flat: sliding the control upward will increase the

43、 output level of that frequency; slid- ing the control downward will decrease it. The Graphic EQ can be used in two ways: 1) To fine tune your 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 acous

44、tics when going from club to club, etc.) 2) For a completely different sound, make larger adjustments and only activate the EQ when you want a “second channel” sound (such as during bass solos). 19. LEVEL: This is the output volume control for the Graphic EQ and only affects the signal when the EQ i

45、s engaged. If the EQd signal is too soft, slide the Level control up; if its too loud, slide the control down. 20.POWER LED: This LED glows green when the Power switch (#22) is ON. 21. ACTIVE LED: This LED illuminates when the EQ is on. 22.POWER: This heavy-duty rocker switch applies the power to th

46、e amplifier: the amp is ON when the top of the switch is depressed, OFF when the bottom of the switch is depressed. LIMIT DEFEAT GRAPHIC EQ TREBLEEFFECTS MIXMASTERFREQUENCYBALANCE 50Hz1kHzDRYWETLOHI 300HzFLAT LIMIT 2kHz5kHz8kHzLEVEL POWER ACTIVE 101115141617 19202221 1213 B4R Bass Amplifier 6 The Re

47、ar Panel BI-AMP SPEAKER OUTPUTS HIGH OUTPUT LOW OUTPUT CHANNEL B CHANNEL A CHANNEL B CHANNEL A 350 WATTS/CH. 4 OHMS, STEREO 500 WATTS/CH. 2 OHMS, STEREO 2 OHM MINIMUM LOAD 1000 WATTS 4 OHMS, MONO BRIDGE 4 OHM MINIMUM LOAD MONO BRIDGE + *MONO BRIDGE: 1+ HOT, 2+ RETURN BIAMP: 1+ LOW HOT, 1 LOW RETURN

48、2+ HIGH HOT, 2 HIGH RETURN 232425 33 23. CIRCUIT BREAKER: The B4R employs an AC line circuit breaker to help protect against damage due to excessive cur- rent demands. If the amplifier stops working, check the circuit breaker. If it has opened, the button will be protruding and showing a contrasting

49、 color. You can 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, have the amplifier checked by a qualified service person. 24. AC LINE IN: Firmly insert the supplied 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! 25. SPEAKER OUTPUTS: The 1/4” jacks offer a convenient method of connecting to speaker cabinets using