Ampeg PortaBass800 Musical Instrument Amplifier User Manual
Contents
1. POOR SOUND Check bass cables POOR SOUND Check speaker s SPEAKER S OK POOR SOUND SPEAKER S DEFECTIVE Replace speaker s 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 PBSOO PortaBass Bass Amplifier Head System Block Diagram CHANNEL 1 0dB f 2dB l GAIN 1 PASS FILTER ULTRA ULTRA LOW MID MID HIGH LOW HIGH FREQ CHANNEL 2 0dB ia 2dB I GAIN 1 PASS FILTER ULTRA ULTRA LOW MID MID HIGH LOW HIGH FREQ EFFECTS EFFECTS RETURN SEND WI EFFECTS A y e BLEND MASTER SPEAKER AMP OUTPUTS 3 LINE OUT gt PRE TRANSFORMER d ae BAL LINE OUT POST LEVEL GND LIFT l QE PB800 PortaBass Bass Amplifier Head Technical Specifications OUTPUT POWER RATING 800 Watts RMS 2 ohm load 120VAC 550 Watts RMS 4 ohm load 120VAC TONE CONTROLS Ultra Low 6dB 40Hz Low 16dB 100Hz Mid 17dB Selected Frequency Mid Freq 180Hz 1 8kHz High 15dB 5kHz Ultra High 8dB 10kHz GAIN 65dB SIGNAL TO NOISE RATIO 80dB typical POWER REQUIREMENTS Domestic 120VAC 60Hz 200VA typical 925VA full power Export 100 120VAC 50 62. lint free cloth to remove dirt and film e Do not 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 irreversible Consider using quality hearing protection devices Declaration Of Conformity 41 Effective 01 01 2001 Manufacturer s Name SLM Electronics Production Facility 1901 Congressional Drive St Louis MO 63146 USA Production Facility 700 Hwy 202 W Yellville AR 72687 USA Shipping Facility 1400 Ferguson Ave St Louis MO 63133 USA Office Facility 1400 Ferguson Ave St Louis MO 63133 USA Product Type Audio Amplifier Complies with the following Standards Safety EN60065 E60065 C22 2 UL6500 and or UL813 EMC 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 314 569 0141 Fax 314 569 0175 Speakon is a registered trademark of Neutrik USA 3 PB800 PortaBass Bass Amplifier Head The Front Panel Controls and Their Use amp o 10 GAIN 7 PEAK 1 2 Items 1 through 10 are typical for chan nels 1 and 2 1 OdB Connect your bass g
3. select the frequency for the Mid control 7 The Mid Freq is sweepable from 180Hz fully count er clockwise to 1 8kHz fully clockwise 9 HIGH Use this control to adjust the high frequency level of the amplifier This control allows an adjustment of 15dB at 5kHz 10 ULTRA HIGH This switch when de pressed increases the high frequency out put by 8dB at 10kHz 11 EFFECTS BLEND Use this control to adjust the level of external efiects that are connected to the Effects Send and Return jacks 21 and 20 rear panel With this control in the fully counterclockwise posi tion no effect is applied to the signal As you rotate the control clockwise the level of the effect increases and the level of dry signal decreases ULTRA HIGH mich LIMIT FL ECIS BLEND MASTER POWER 11 12 13 14 15 NOTE When using the effects loop with a compressor limiter this control must be rotated fully clockwise for optimum results 12 LIMIT This LED illuminates when the internal limit circuit is activated This indi cates that the amplifier is nearing full out out and the limiter is keeping the amplifier from clipping the output signal 13 MASTER Use this control to adjust the output level of the amplifier If the Limit LED illuminates reduce this control until the Limit LED only flashes on strong signals 14 POWER ON INDICATOR This light illuminates when the amplifier is turned on 15 POWER Us
4. 0Hz 200VA typical 925VA full power 230 240VAC 50 60Hz 200VA typical 925VA full power SIZE AND WEIGHT 15 W x 3 75 H x 11 5 D 22 Ibs www ampeg com Proudly Made in the U S A by Ampeg 2003 SLM Electronics 1400 Ferguson Avenue St Louis MO 63133 U S A P N 47 058 11 12 23 03
5. AS ADENTRO QUE EL USARIO LE COUVERCLE AUCUNE PIECE INTERNE N EST REPRABLE PAR L UTILISATEUR POUR TOUTE SERVICING TO QUALIFIED SERVICE PERSONNEL PUEDO REPARAR DEJE TODO MANTENIMIENTO A LOS TECHNICOS CALIFICADOS REPARATION S ADRESSER A UN TECHNICIEN QUALIFIE IMPORTANT SAFETY INSTRUCTIONS READ FOLLOW HEED AND KEEP ALL INSTRUCTIONS AND WARNINGS e 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 e DO NOT USE THIS APPARATUS NEAR SPLASHING FALLING SPRAYING OR STANDING LIQUIDS e CLEAN ONLY WITH LINT FREE DAMP CLOTH AND DO NOT USE CLEANING AGENTS e ONLY CONNECT POWER CORD TO A POLARIZED SAFETY GROUNDED OUTLET WIRED TO CURRENT ELECTRICAL CODES AND COMPATIBLE WITH VOLTAGE POWER AND FREQUENCY REQUIREMENTS STATED ON THE REAR PANEL OF THE APPARATUS e PROTECT THE POWER CORD FROM DAMAGE DUE TO BEING WALKED ON PINCHED OR STRAINED e UNPLUG THE APPARATUS DURING LIGHTNING STORMS OR WHEN UNUSED FOR LONG PERIODS OF TIME 7 ONLY USE ATTACHMENTS ACCESSORIES STANDS OR BRACKETS SPECIFIED BY THE MANUFACTURER FOR SAFE OPERATION AND TO AVOID INJURY 3 1 e 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 e OUR AMPLIFIERS ARE CAPABLE OF PRODUCING HIGH SOUND
6. 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 DANGEROUS VOLTAGE IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL EXPLICACION DE SIMBOLOS GRAFICOS A VOLTAJE PELIGROSO A ES NECESARIO QUE EL USUARIO SE REFIERA AL MANUAL DE INSTRUCCIONES REFERREZ VOUS AU MANUAL D UTILISATION EXPLICATION DES SYMBOLES GRAPHIQUES DANGER HAUTE TENSION PB3800 PortaBass Bass Amplifier Head Features In the world of high performance bass amps Ampeg amplifiers stand alone In true Ampeg tradition the PB800 offers you more power performance and tone than any other bass amplifier in its class The outstanding features which set your new amplifier apart from the competition are listed below e MDT POWER AMP Micro Dynamic Technology amplifier circuitry provides maximum power in a small lightweight package the efficiency of this design eliminates the need for heavy heat sinks transformers and filter capacitors e TWO SEPARATE CHANNELS Change instruments without swapping instrument cables or read justing amp controls e THREE BAND ROTARY EQ Three bands of equalization and a selectable Middle Frequency pro vide optimum tone control e ULTRA LOW ULTRA HIGH SWITCHES Enhances flexibility and tone control e EFFECTS LOOP
7. Send and Return jacks are combined with an Effects Blend control for virtually noise free use of your favorite effects e TRANSFORMER BALANCED LINE OUTPUT XLR jack with level control ground lift and a pre post EQ switch for patching into house consoles mixing boards or external power amplifiers e SPEAKON AND 1 4 SPEAKER OUTPUT JACKS Compatible with either type of connecting cable e MADE WITH PRIDE IN THE U S A 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 service center e NEVER set the amplifier on a support that might give out under its weight e Always keep the total soeaker impedance 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
8. User s Guide for the Proudly Made in the U S A by Ampeg PB3800 PortaBass Bass Amplifier Head Thank you for choosing the Ampeg PB800 PortaBass Bass Amplifier Head The PB800 features Ampeg s radical new Micro Dynamic Technology power amp circuitry and TWO individually adjustable input channels This gives you the ultimate combination of power tone and portability in a small lightweight package In order to obtain maximum performance and enjoyment from your new Ampeg amplifier please read these instructions prior to its use TABLE OF CONTENTS Features Important Safeguards and Precautions The Front Panel Controls and Their Use The Rear Panel Troubleshooting System Block Diagram Technical Specifications O CAUTION PRECAUCION O ATTENTION RISK OF ELECTRIC SHOCK RIESGO DE CORRIENTAZO RISQUE D ELECTROCUTION DO NOT OPEN NO ABRA NE PAS OUVRIR WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE PRECAUCION PARA REDUCIR EL RIESGO DE INCENDIOS O DESCARGAS ELECTRICAS NO PER ATTENTION PROTEGEZ CET APPAREIL DE LA PLUIE ET DE L HUMIDITE AFIN D EVITER TOUT THIS APPARATUS TO RAIN OR MOISTURE TO REDUCE THE RISK OF ELECTRIC MITA QUE ESTE APARATO QUEDE EXPUESTO A LA LLUVIA O LA HUMEDAD PARA DISMINUOIR EL RISQUE D INCENDIE OU D ELECTROCUTION POUR REDUIRE D ELECTROCUTION NE PAS ENLEVER SHOCK DO NOT REMOVE COVER NO USER SERVICEABLE PARTS INSIDE REFER RIESGO DE CORRIENTAZO NO ABRA LA CUBIERTA NO HAY PIEZ
9. ch is depressed the ground pin of the Transformer Balanced Line Out jack 24 is interrupted This may reduce residual hum and buzz which is sometimes picked up by line out signal cables This switch does not affect signal at the 1 4 Line Out jack 19 25 PRE POST This switch determines whether the signal at the Transformer Balanced Line Out jack 23 is pre EQ switch out or post EQ switch depressed 26 FAN The PB800 employs an internal cooling fan to circulate air through the unit to prevent thermal overload conditions Do not obstruct the rear or side panel air vents Allow substantial clearance at all vents for proper air circulation at all times Speakon is a registered trademark of Neutrik USA 5 PBSOO PortaBass Bass Amplifier Head Troubleshooting In the unlikely event that your PB800 should malfunction take a few minutes to troubleshoot it before you call for serv ice Sometimes you can save yourself time and money by doing it yourself and often the cure for the problem is simple NORSTOE B LEDs LIGHT LEDs DON T LIGHT Check amp controls check Check AC outlet for signal from bass OUTLET OK NO POWER ool NOWIN OUTLET OK NO POWER Check house fusebox Listen for hum or circuit breaker Check power cord fuse power switch Check speaker Unplug bass touch tip of cable Replace cable Check inst pickup NO CHANGE SOUND OK SEE BELOW
10. e this switch to apply power to the amplifier The amp is on when the top of the switch is depressed and off when the bottom of the switch is depressed PBSOO PortaBass Bass Amplifier Head The Rear Panel AC LINE IN SS MADI IN THE U S A BY 1400 Fi RGUSON AVENUE ST OUIS MO 63133 WARI lING TO AVOID THE F SK OF FIRE OR ELECTRIC Sh CK DO NOT EXPOSE THIS QUIPMENT TO RAIN OR N STURE FCC PART 15 CLASS A 17 16 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 17 CIRCUIT BREAKER The circuit breaker protects the unit from damage caused by excessive current demands If the amplifier stops working check the cir cuit breaker If it has opened the button will protrude showing a contrasting color Reset the circuit breaker by depressing it until it latches The breaker must cool down for a short time before the button will latch lf the circuit breaker opens repeatedly have the amplifier inspected by a qualified service person 18 SPEAKER OUTPUTS Connect the amplifier to your speaker cabinet s using heavy gauge speaker cables terminated with the appropriate connectors The Speakon jack is recom
11. mended when play ing at full output levels SPEAKER OUTPUTS 550 WATTS 4 OHMS 800 WATTS 2 OHMS MINIMUM LOAD ill IF 55 15531 9 PB800 XX SERIAL ABCDE01234 Line 120V Freq 60 Pwr XXVA EFFECTS EFFECTS ND LINE OUT RETURN SE 19 20 21 ATTENTION When connecting speaker cabinets to the amplifier the minimum total impedance load must not be lower than two ohms The following chart shows the total impedance load when conneciing multiple speaker cabinets in parallel Total Impedance of Cabs Cabinet Impedance 19 LINE OUT Use this 1 4 jack to send a post EQ line level signal to an external amplifier mixing console or recording equipment 20 EFFECTS RETURN When using an external effect connect the effects output into this jack by means of a shielded signal cable 21 EFFECTS SEND When using an external effect connect this jack to the effect s input by means of a shielded signal cable 22 LEVEL Use this control to adjust the level of the signal at the Transformer bal anced Line Out jack 23 TRANSFORMER BAL LINE OUT PRE BL d KOSIT n ML LIFT ma Fi 22 23 24 25 26 23 TRANSFORMER BAL LINE OUT Use this XLR jack to send a line level sig nal to an external amplifier mixing console or recording equipment The signal at this jack may be pre or post EQ depending on the setting of the Pre Post switch 25 24 GND LIFT When this swit
12. uitar here by means of a shielded instrument cable If your bass has active electronics or high output pickups or if the Peak LED 4 illu minates at low signal levels connect your bass to the 12dB jack 2 2 12dB Connect your bass guitar here by means of a shielded instrument cable If your bass has passive electronics or low output pickups or if the Peak LED 4 does not illuminate at high signal levels connect your bass to the OdB jack 1 3 GAIN Use this control to adjust the level of the signal going into the preamp Adjust this control until the Peak LED 4 flashes on strong signal peaks 4 PEAK This LED will illuminate when the level of the preamp signal is close to over driving the amplifier For the best signal to noise ratio set the Gain control 3 so the Peak LED flashes on strong signal spikes during normal playing of your instrument 5 ULTRA LOW This switch when de pressed increases the low frequency out put by 6dB at 40Hz 1kHz 0 0 0 6 0 10 0 10 z2 10 u ie MID 2kHz O MID FREQ 1kHz 0 0 0 0 3 4 5 6 7 8 9 10 6 LOW Use this control to adjust the low frequency level of the amplifier This control allows an adjustment of 16dB at 100Hz 7 MID Use this control to adjust the midrange frequency level of the amplifier This control allows an adjustment of 15dB at the frequency selected by the Mid Freq control 8 8 MID FREQ Use this control to
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