User’s Guide for the Bass Amplifier Head Proudly Made in the U.S.A.
PB800 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 . . . .
PB800 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.
PB800 PortaBass Bass Amplifier Head The Front Panel Controls and Their Use: 1 2 3 4 Items 1 through 10 are typical for channels 1 and 2. 1. 0dB: Connect your bass guitar here by means of a shielded instrument cable. If your bass has active electronics or highoutput pickups, or if the Peak LED (#4) illuminates 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.
PB800 PortaBass Bass Amplifier Head The Rear Panel: 16 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.
PB800 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 service. Sometimes you can save yourself time and money by doing it yourself, and often the cure for the problem is simple. If the problem isn’t covered above, or if the steps lead you here, then contact your Ampeg dealer for service information.
PB800 PortaBass Bass Amplifier Head System Block Diagram CHANNEL 1 0dB HIGH PASS FILTER -12dB GAIN ULTRA ULTRA LOW HIGH LOW MID MID HIGH FREQ PEAK CHANNEL 2 0dB HIGH PASS FILTER -12dB GAIN EFFECTS RETURN ULTRA ULTRA LOW HIGH LOW MID MID HIGH FREQ EFFECTS SEND CW EFFECTS BLEND LIMIT POWER AMP MASTER SPEAKER OUTPUTS LINE OUT PRE TRANSFORMER BAL.
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.
