Ampeg B2R Stereo Amplifier User Manual
Contents
1. or external power amplifiers e EFFECTS LOOP For increased intensity and quieter operation of external effects e POWER AMP IN and PREAMP OUT Allows direct access into the power amp and a signal tap from the preamp section for even greater versatility e MUSICIAN MADE IN THE U S A B2 B2R Bass Amplifier Q A bez xERAA 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 ser vice center e NEVER set the amplifier on a support that might give out under its weight e 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 serious injuries e Always keep the total speaker im2. preamp circuitry of the B2 B2R WARNING This jack goes directly into 19 PREAMP OUT A post EQ signal may be taken from this jack and sent to the house mixing board recording console or external power amplifier 20 EFFECTS RETURN To use an exter nal effects device connect the OUTPUT of the device to this jack by means of a shield ed cable This feeds the processed signal into the Master section of the B2 B2R 18 19 20 2122 23 24 21 EFFECTS SEND Connect the output from this jack to the INPUT of your effects by means of a shielded cable This sends a post EQ signal to your effects 22 20dB SWITCH This switch adjusts the output level at the Balanced Line Output jack 24 The control works inde pendently from the front panel Master con trol Depressing the switch activates the 20dB pad The result is a signal that is more compatible with the microphone inputs on a mixer 23 PRE POST SWITCH You can select either Pre or Post EQ for the signal at the Balanced Out jack 224 with this switch With the switch in the OUT position the signal at the jacks will be Pre EQ This is a direct output not affected by any EQ or boost settings With the switch depressed the signal is Post EQ and is controlled and modified by the tone controls Graphic EQ and Effects Loop 24 BALANCED OUTPUT This XLR type connector supplies a balanced preamp out put signal for connecting to a house mixing board recording console or
3. Owner s Guide for the Aber zgzeay B2 B2R Bass Amplifier A Moo ama B2 B2R Bass Amplifier TABLE OF CONTENTS Introduction Features Important Safeguards and Precautions The Front Panel Controls and Their Use The Rear Panel Some Suggested Settings Rack Mounting B2R only Troubleshooting System Block Diagram Technical Specifications An introduction To Your New Ampeg B2 B2R 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 amplifiers available the Ampeg B2 B2R Whether you ve purchased the portable B2 combo system or the two space rack mountable B2R head version your new B2 B2R bass amplifier provides many outstanding features Three hundred and fifty watts of pure bass energy total tone control and rugged construction make each one a true performer s bass amp Features In the world of high performance bass amps Ampeg s SVT amplifiers stand alone In true Ampeg tradition the B2 B2R offers you more power performance and flexibility than any other bass amplifier in its class The outstanding features of your new amplifier features which set it apart from the competition are listed below e 9 BAND GRAPHIC EQ Use as a second channel for bass solos or to shape your sound to your own exacting standards e BALANCED LINE OUTPUT XLR with independent level switch 20dB pad Patch into house consoles mixing boards
4. RISK OF ELECTRIC SHOCK DO NOT 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 QUALIFIED 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 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 Table G 16 SOUND LEVEL dBA DURATION PER DAY SOUND LEVEL dBA DURATION PER DAY SLOW RESPONSE IN HOURS SLOW RESPONSE IN HOURS 1 1 2 1 1 2 1 4 or less EXPLANATION OF DANGEROUS VOLTAGE IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL DANGER HAUTE TENSION REFERREZ VOUS AU MANUAL D UTILISATION GRAPHICAL SYMBOLS GEFAHLICHE SPANNUNG UNBEDINGT IN DER BEDIENUNGSANLEITUNG NACHSCHLAGEN MC EM B2 B2R Bass Amplifier The Front Panel Controls and Their Use 150Hz 300Hz 600Hz B2R 1 OdB INPUT The signal output from an instrument active or passive or a line level signal may be connected h
5. TREBLE SEND 9 BAND EQ ue uBeeas ha gu Hemd A Moo ama B2 B2R Bass Amplifier Technical Specifications OUTPUT POWER RATING POWER REQUIREMENTS 350 Watts RMS 4 ohm load 120VAC 200 Watts RMS 8 ohm load 120VAC Domestic 120VAC 60Hz 310VA Export 100 120VAC 50 60Hz 310VA 230 240VAC 50 60Hz 310VA TONE CONTROL RANGE Bass 8dB 50Hz Ultra Mid 8dB 500Hz Treble 12dB 19dB 5kHz GRAPHIC EQ RANGE 40Hz 11dB 80Hz 8dB 150Hz 8dB 300Hz 8dB 600Hz 8dB 900Hz 8dB 2kHz 8dB 5kHz 9dB 8kHz 12dB GAIN 45dB typical tones center SIGNAL TO NOISE RATIO 75dB typical INTERNAL SPEAKER B2 ONLY Size Type 15 Ampeg Custom 1 Magnet 96 OZ Voice Coil 25 Impedance 8 ohms SIZE AND WEIGHT B2 24 W x 24 5 H 26 5 w casters x 16 D 87 lbs B2R 19 W x 1 75 H x 12 75 D 15 Ibs c rape eae www ampeg com oV es Ampeg is proudly Made in America 1999 SLM Electronics 1400 Ferguson Avenue St Louis MO 63133 U S A P N 47 577 03 10 99
6. e unit from dam age due to overload conditions or power line surges If the fuse blows replace it only with the same size and type 16 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 17 SPEAKER OUTPUTS Use these jacks to connect the amplifier to your speaker s using cables terminated with 1 4 connectors For the B2 combo use the supplied speaker cable to connect the out put of the amplifier to the speaker jack An extension speaker with an impedance of 8 ohms or higher may be connected and allows the amplifier to deliver its maximum power NOTE In some areas 1 4 jacks are not acceptable for use as extension speak er jacks For this reason the 1 4 jacks on your amplifier may be factory sealed In such cases use the Speakon jack to connect to external speaker cabinets 17 For the B2R connect the output s using high quality speaker cables NOTE When connecting multiple speaker cabinets to the B2 B2R keep the overall impedance at or above four ohms The following chart shows the total impedance load when connecting speaker cabinets in parallel Total Impedance of Cabs Cabinet Impedance 18 POWER AMP IN This mono jack allows you to feed the preamp output of another amplifier to the input of the B2 B2R s internal power amp This bypass es the
7. ere by means of a shielded instrument cable 2 15dB PAD This switch when depressed attenuates the input signal by 15dB Attenuation allows the Gain control 4 to be used over a larger portion of its range If clipping is indicated with the Gain control near minimum attenuation is need ed 3 PEAK LED This LED flashes when the signal level into the preamp approaches clipping Adjust the Gain control 4 until a strong signal from your instrument causes this LED to flicker NOTE If the LED flashes frequently with the gain at a low setting use the 15dB Pad 2 to attenuate the input signal and read just the Gain 4 GAIN This serves as the input level control for the amplifier For the best signal to noise ratio set this control so the Peak LED 8 flashes when you strike a string fairly hard 5 BASS This is the primary low frequency control which allows for 8dB of cut or boost at 50Hz 6 ULTRA MID This is the primary midrange control Rotate the control to the left of center for a contoured sound more distant less midrange output or to the right of center for a pronounced more up front tone 7 TREBLE This is the primary high fre quency control which allows for 12dB of boost or 19dB of cut at 5kHz 8 MASTER Set the overall output level of the amplifier with this control The Effects Loop and Balanced Out 19 21 24 are not affected by the Master control 9 LIMITER The B2 B2R uses an int
8. ernal Optocoupler Limiter to assist in keeping the power amplifier s output clean at extreme volume levels All amplifiers begin to clip their output signals as they approach maxi mum output levels resulting in distortion which may damage your speakers To engage the Limiter depress the Limit switch Whenever the amplifier is at full power the adjacent LED will flash This is an indication that the limiter is keeping peak signals from clipping the output NOTE Playing at full power with the Limiter off will give you increased output power but the sound may be distorted Use discretion when playing without the Limiter 10 EQ ON SWITCH Depress this switch to activate the Graphic EQ The adjacent LED illuminates when the EQ is on 11 GRAPHIC EQ These sliders control the output of the frequencies indicated above each control The center position of each control is flat no boost or cut 12 POWER ON LED This LED indicator illuminates when the POWER switch 13 is ON 13 POWER SWITCH This heavy duty rocker switch applies the power to the amplifier The amp is ON when the top of the switch is depressed OFF when the bottom of the switch is depressed The Rear Panel B2 B2R Bass Amplifier 14 FAN This temperature controlled vari able speed fan draws cool air into the amplifier which forces heat out through the exhaust vents Never block the vent holes or the fan opening 15 FUSE This protects th
9. external ampli fiers with balanced inputs The signal can be set to Pre or Post EQ by the back panel Pre Post switch 23 The level can be adjusted for either mic or line type inputs using the 20dB switch 22 Speakor is a registered trademark of Neutrik USA A A her m az az B2 B2R Bass Amplifier Some Suggested Settings The setting of the Gain control depends on your particular instrument The Master should be set to produce the appropriate output volume level The Graphic EQ can be used to tailor the amplifier to your speaker cabinets to compensate for room acoustics and to fine tune your sound ROCK ULTRA MID TREBLE MASTER JAZZ ULTRA MID TREBLE MASTER COUNTRY ULTRA MID TREBLE MASTER ULTRA MID TREBLE MASTER Rack Mounting B2R only When mounting the B2R into a rack the four bottom feet should be removed to maintain the two 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 continual ly safe and secure installation B2 B2R Bass Amplifier Q A baz xERAA T
10. pedance 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 Don t 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 irre versible CAUTION ATTENTION VORSICHT EC M OF ELECTRIC SHOCK E D ELECTROCUTION Bus ee SCHLAGGEFAHR EC M NOT OPEN NE E OUVRIR Bus ee OFFENEN CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK ATTENTION POUR REDUIRE D ELECTROCUTION NE PAS VORSICHT ZUR MINIMIERUNG ELEKTRISCHER SCHLAGGEFAHR NICHT DO NOT REMOVE COVER ENLEVER LE COUVERCLE AUCUNE PIECE INTERNE N EST REPRABLE DEN DECKEL ABENHMEN INTERNE TEILE KONNEN NICHT VOM NO USER SERVICEABLE PARTS INSID PAR L UTILISATEUR POUR TOUTE REPARATION S ADRESSER A UN BENUTZER GEWARTET WERDEN DIE WARTUNG IS QUALIFIZIERTEM REFER SERVICING TO QUALIFIED SERVICE PERSONNEL TECHNICIEN QUALIFIE WARTUNGSPERSONAL 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
11. roubleshooting In the unlikely event that your B2 B2R should malfunction take a few minutes to troubleshoot it before you call for ser vice You can save yourself a lot of time and sometimes money by doing it yourself and often the cure for the problem is something quite simple NO SOUND POOR SOUND Check bass cables POOR SOUND Check speaker s SPEAKER S OK POOR SOUND LEDs LIGHT Check amp controls check for signal from bass LEDs DON T LIGHT Check AC outlet OUTLET OK NO POWER Check house fusebox or circuit breaker SOUND OK Check power cord SPEAKER S fuse power switch DEFECTIVE Listen for hum Replace speaker s POOR SOUND Check speaker Unplug bass touch tip of cable Check inst pickup Replace cable NO CHANGE 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 infor mation Also you should refer your amp to an authorized service center for servicing if it gets dropped has liquid spilled into it or sustains damage to its power cord see page 3 System Block Diagram LIMIT SPEAKON JACK I PROTECTION Q SPEAKER OUTPUT ens wm MA c INPUT og BALANCED ON LOW VOLTAGE Ong LINE OUT coouing DC PROTECT SPEAKER FAN OUTPUT m MASTER EFFECTS RETURN EFFECTS BASS ULTRA MID
Download Pdf Manuals
Related Search