User's Guide for the Bass Amp Combo
Contents
1. Features In the world of high performance bass amps Ampeg amplifiers stand alone In true Ampeg tradition the BA5OO 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 500 WATTS AT 2 OHMS With the addition of a four ohm external speaker cabinet the BA500 will deliver an astounding 500 watts of power into a two ohm load 9 BAND GRAPHIC EQ Use as a second channel for bass solos or to shape your sound to your own exacting standards Can be controlled by means of a footswitch MUTE SWITCH Allows silent tuning while on stage or noise free switching between instruments Can be controlled by a footswitch BALANCED LINE OUTPUT XLR with independent level switch 20dB pad Patch into house consoles mixing boards or external power amplifiers EFFECTS LOOP For increased intensity and quieter operation of external effects 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 TUNER OUT JACK Allows the use of an external tuner even when the Mute function is active BUILT IN PROTECTION Internal protection circuitry for short circuits DC voltage low voltage and over temperature conditions CLASSIC AMPEG SOUND AND PERFORMANCE ID esr BA500 Bass Amp Combo The Front Pane2. 24dB 5kHz GRAPHIC EQ RANGE 40Hz 11dB 80Hz 8dB 150Hz 8dB 300Hz 8dB 600Hz 8dB 900Hz 8dB 2kHz 8dB 5kHz 8dB 9kHz 12dB GAIN 60dB typical tones center SIGNAL TO NOISE RATIO 75dBtypcal o o 0000000000 INTERNAL SPEAKERS 2 10 cast frame 225W 8 ohm 2 5 voice coil diameter 56 oz magnet 1 1 compression driver with L pad control POWER REQUIREMENTS 120VAC 60Hz 400VA SS 100VAC 50 60Hz 400VA 230VAC 50 60Hz 400VA SIZE AND WEIGHT 24 W x 23 5 H x 17 25 D 95 lbs p eae www ampeg com v o Ampeg is proudly Made in America 2004 SLM Electronics 1400 Ferguson Avenue St Louis MO 63133 U S A emt P N 47 823 01 01 12 04
3. power switch or circuit breaker POOR SOUND DEFECTIVE I I NO HUM HUM Ls OK Replace speaker s Unplug bass POOR SOUND touch tip of cable NO SOUND LEDs LIGHT NO CHANGE I Replace cable I 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 Regular cleaning and maintenance by your local Service Center will help extend the amplifier s useful life System Block Diagram TUNER PROTECTION OUT POWER AMP RELAY SPEAKER PRE BAL OUT INPUT I I OUT Thermal Shutdown e POST e pon l l roteci e t SPEAKER PAD 20dB PAD OUT POWER AMP IN E Ww 3 A S z PREAMP OUT I MASTER idi EFFECTS LOOP RETURN EFFECTS GAIN BASS ULTRA MID TREBLE ID er BA500 Bass Amp Combo Technical Specifications OUTPUT POWER RATING 350 Watts RMS 4 ohm load 120VAC 5 THD 540 Watts RMS 2 ohm load 120VAC 5 THD TONE CONTROL RANGE Bass 8dB 18dB 50Hz Ultra Mid 8dB 500Hz Treble 12dB
4. rotate this control clockwise ID esr BA500 Bass Amp Combo Some Sugges ted 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 dini 150Hz 300Hz 800Hz S00Hz kHz ROCK Bass Ultra Mid Treble Master Graphic Equalizer JAZZ 150Hz 300Hz GOOHz S00Hz 2kHz Bass Ultra Mid Treble Master Graphic Equalizer COUNTRY dini 80Hz 150Hz 300Hz 600Hz SO0Hz 2kHz Bass Ultra Mid Treble Master Graphic Equalizer FUNK POPPING dini 150Hz 300Hz 800Hz S00Hz 2kHz Bass Ultra Mid Treble Master Graphic Equalizer BA500 Bass Amp Combo IO eae Troubleshooting In the unlikely event that your BA500 should stop working properly or just stop working take a few minutes to trou bleshoot it before you call for service 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 POOR SOUND LEDs DON T LIGHT Check bass cables Check amp controls check Check AC outlet POOR SOUND SOUND for signal from bass I I OUTLET OK INO OUTLET Check speaker s NO SOUND SOUND ok I I T e I Check power cord Check house fusebox SPEAKER S OK SPEAKER S Listen for hum fuse
5. 22 23 242526 27 24 EFFECTS LOOP SEND Connect the output from the Send jack to the INPUT of your effects by means of a shielded cable This sends a post EQ signal to your effects 25 20dB OdB This switch when depressed attenuates the output level at the Bal Out jack 27 resulting in a signal that is more com patible with the microphone inputs on a mixer This switch works independently from the front panel Master control 26 POST PRE You can select either Pre or Post EQ for the signal at the Balanced Out jack 27 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 affect ed by any EQ or boost settings When the switch is depressed the signal is Post EQ and is controlled and modified by the tone controls Graphic EQ and Effects Loop 27 BAL OUT This XLR type connector supplies a balanced preamp output signal for connecting to a house mixing board recording console or external amplifiers with balanced inputs The signal can be set to Pre or Post EQ by the Post Pre switch 426 The level can be adjusted for either mic or line type inputs using the 20dB 0dB switch 25 28 HF LEVEL CONTROL cabinet back not shown Use this control to adjust the output level of the high frequency driver With the control fully counter clockwise there is no output from the high frequency driver The output from the high frequency driver increases as you
6. NOTE When connecting multiple speak er cabinets to the amplifier keep the overall impedance at or above two ohms The BA500 s internal speakers count as one four ohm cabinet The following chart shows the total impedance load when connecting speaker cabinets in parallel 18 Cabinet of Total Impedance Cabs Impedance 40 2 20 80 2 40 80 4 20 160 2 80 160 4 40 19 FOOTSWITCH Use this jack to con nect a two button footswitch for remote control of the Mute and Graphic EQ Tip Mute ring EQ sleeve ground When a footswitch is used the corresponding front panel switches 2 and 11 are disabled 20 POWER AMP IN This mono jack allows you to feed the preamp output of another amplifier to the input of the BA500 s internal power amp This bypass es the preamp circuitry of the amplifier 21 TUNER OUT Use this jack to send a signal to an electronic tuner This jack is always live even when the Mute switch 2 is engaged allowing for silent tuning as well as a monitor feed which remains active when the speakers are muted 22 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 23 EFFECTS LOOP RETURN To use an external effects device connect the OUT PUT of the device to the Return jack by means of a shielded cable This feeds the processed signal into the Master section of the BA500 19 20 21
7. O NOT USE CLEANING AGENTS LET WIRED TO CURRENT ELECTRICAL CODES AND COMPATIBLE WITH VOLTAGE POWER AND ON THE REAR PANEL OF THE APPARATUS PINCHED OR STRAINED HTNING STORMS OR WHEN UNUSED FOR LONG PERIODS OF TIME ED BY THE MANUFACTURER FOR SAFE OPERATION AND TO AVOID INJURY XPOSE THIS UNIT TO RAIN OR MOISTURE 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 EXPLICACION DE SIMBOLOS GRAFICOS EXPLICATION DES SYMB LES GRAPHIQUES A DANGEROUS VOLTAGE VOLTAJE PELIGROSO DANGER HAUTE TENSION IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL ES NECESARIO QUE EL USUARIO SE REFIERA AL MANUAL DE INSTRUCCIONES REFERREZ VOUS AU MANUAL D UTILISATION A BA500 Bass Amp Combo IO eae Y An introduction To Your New Ampeg BA500 Bass Amp Combo 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 BA500 Your new BA500 bass amp combo provides many outstanding features which make this a true performer s bass amp 350 watts of power at four ohms 500 watts at two ohms a 45 degree tilt back cabinet design total tone con trol and rugged construction
8. TE NEAR ANY HEAT SO 75CM OF WELL VENTILATED SPACE AROUND HEATSINKS AND OTHER AIR DO NOT USE THIS APPARATUS NEAR SPLASHING FALLING SPRAYING OR CLEAN ONLY WITH LINT FREE DAMP C ONLY CONNECT POWER CORD TO A POLARIZED SAFETY GROUNDED OUT FREQUENCY REQUIREMENTS STATED PROTECT THE POWER CORD FROM DAMAGE DUE TO BEING WALKED ON UNPLUG THE APPARATUS DURING LIG ONLY USE ATTACHMENTS ACCESSORIES STANDS OR BRACKETS SPECIF WARNING TO REDUCE THE RISK OF ELECTRIC SHOCK OR FIRE DO NOT E SERVICE MUST BE PERFORMED BY QUALIFIED PERSONNEL RIESGO DE CORRIENTAZO NO ABRA PRECAUCION PARA REDUCIR EL RIESGO DE INCENDIOS O DESCARGAS ELECTRICAS NO PER MITA QUE ESTE APARATO QUEDE EXPUESTO A LA LLUVU NO ABRA LA CUI PUEDO REPARAR DEJE TODO MANTENIMIENTO A LOS TECHNICOS CALIFICADOS 69 0141 Fax 314 569 0175 PRECAUCION ATTENTION RISQUE D ELECTROCUTION NE PAS OUVRIR ATTENTION PROTEGEZ CET APPAREIL DE LA PLUIE ET DE L HUMIDITE AFIN D EVITER TOUT eee a INCENDIE OU D ELECTROCUTION POUR REDUIRE D ELECTROCUTION NE PAS ENLEVER ERCLE AUCUNE PIECE INTERNE N EST REPRABLE PAR L UTILISATEUR POUR TOUTE REPARATION S ADRESSER A UN TECHNICIEN QUALIFIE A IA O LA HUMEDAD PARA DISMINUOIR EL IBIERTA NO HAY PIEZAS ADENTRO QUE EL USARIO SAFETY INSTRUCTIONS URCE AND DO NOT BLOCK ANY VENTILATION OPENINGS ON THIS APPARATUS FOR PROPER OPERATION THIS UNIT REQUIRES 3 FLOW PROVISIONS IN THE CABINET STANDING LIQUIDS LOTH AND D
9. User s Guide for the Or era BA500 Bass Amp Combo Made in the U S A b Q A oregrezaz EN BA500 Bass Amp Combo TABLE OF CONTENTS Introduction Features The Front Panel Controls and Their Use The Rear Panel Some Suggested Settings Troubleshooting System Block Diagram Technical Specificatio ns Declaration Of Conformity 30 Effective 01 01 2001 SLM 1901 Manufacturer s Name Production Facility Production Facility Shipping Facility Office Facility Product Type Electronics Congressional Drive St Louis MO 63146 USA 700 Hwy 202 W Yellville AR 72687 USA 1400 Ferguson Ave St Louis MO 63133 USA 1400 Ferguson Ave St Louis MO 63133 USA Audio Amplifier Complies with the following Standards Safety EMC EN60065 E60065 C22 2 UL6500 and or UL813 Directive 89 336 EEC EN55103 EN55013 EN61000 and or FCC 47CFR 15B clA Supplementary information provided by SLM Electronics R amp D Engineering 1901 Congressional Drive St Louis MO 63146 USA Tel 314 5 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN A A WARNING TO REDUCE THE RISK OF FIRE OR ates SHOCK DO NOT EXPOSE A me APPARATUS od RAN OR MOISTURE TO RI THE RISK OF ELECTRIC E COVER NO USER SERVICEABLE PARTS INSIDE REFER SERVICING 10 QUALIFIED SERVICE PERSONNEL RIESGO DE CORRIENTAZO IMPORTANT READ FOLLOW HEED AND KEEP ALL INSTRUCTIONS AND WARNINGS DO NOT OPERA
10. l Controls and Their Use 1 INPUT Connect your instrument here by means of a shielded instrument cable 2 MUTE This switch when depressed mutes the output of the amplifier to the speakers This is excellent for tuning your bass with an electronic tuner without hav ing to adjust any levels or turn down your stage volume When a footswitch is used see 19 rear panel this switch is dis abled The Tuner Out and Bal Out jacks 21 and 27 are unaffected by the Mute switch 3 PAD This switch when depressed attenuates the input signal by 15dB Attenuation allows the Gain control 5 to be used in a more usable higher position If clipping is indicated with the Gain control way down attenuation is needed 4 PEAK MUTE LED This LED flashes when the signal level into the preamp excluding the graphic EQ approaches clip ping Adjust the Gain control 5 until a strong signal from your instrument causes this LED to flicker When the Mute function is engaged this LED remains fully illuminated NOTE If the LED flashes frequently with the gain at a low setting use the Pad switch 3 to attenuate the input signal and readjust the Gain 5 5 GAIN Use this control to adjust the input level of the amplifier For the best signal to noise set this control so the Peak Mute LED 4 flashes when you strike a string fairly hard 6 BASS This is the primary low frequency control It allows for a range of 8dB of b
11. oost or 18dB of cut at 50Hz 7 ULTRA MID The primary midrange control Rotate the control to the left of cen ter for a contoured sound more distant less midrange output or to the right of cen ter for a sound which really cuts through 8 TREBLE This is the primary high fre quency control It allows for a range of 12dB boost or 24dB of cut at 5kHz 9 MASTER Set the overall output level of the amplifier with this control The Effects Loop and Balanced Out 423 27 are not affected by the Master control 10 LIMIT The BA500 uses an internal Optocoupler Limiter to assist in keeping the power amplifier s output clean at extreme volume levels All amplifiers may begin to clip their output signals as they approach maximum output levels resulting in poten tially damaging distortion To engage the Limiter depress the Limit switch The adja cent LED illuminates whenever the limiter circuit is activated This indicates that the amplifier is nearing full output and the lim iter 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 11 EQ ON Depress this switch to activate the Graphic EQ The adjacent LED illumi nates when the EQ is on When a footswitch is used see 19 rear panel this switch is disabled 12 GRAPHIC EQ These sliders control the o
12. utput of the frequencies indicated below each control The center position of each control is flat no boost or cut 13 ON LED This LED indicator illuminates when the POWER switch 14 is ON 14 POWER 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 BA500 Bass Amp Combo Io eae 15 FAN The temperature controlled vari able speed fan pulls cool air through the amplifier s intake vents forcing heat out through the fan Never block the air intake holes or the fan opening NOTE It is not uncommon for the fan to remain off when the amplifier is first pow ered up 16 FUSE The fuse protects the unit from damage due to overload conditions or power line surges If the fuse fails replace it only with the same size and type 17 AC LINE IN Firmly insert the female end of the supplied AC power cord into this socket The grounded power cord should only be plugged into a grounded power outlet that meets all applicable electrical codes and is compatible with the voltage power and frequency requirements stated on the rear panel Do not attempt to defeat the safety ground connection 18 SPEAKERS Use these jacks to con nect the amplifier to your speaker s using cables terminated with the appropriate con nectors Always use high quality speaker cables for these connections
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