PBC228 PortaBass Amplifier Thank you for choosing the Ampeg PBC228 PortaBass Amplifier. The PBC228 features Ampeg’s radical new Micro Dynamic Technology power amp circuitry and two 8” neodymium speakers. 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 . . . . . . . . . . . . . . . . . . . . .
PBC228 PortaBass Amplifier Features In the world of high performance bass amps, Ampeg amplifiers stand alone. In true Ampeg tradition, the PBC228 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.
PBC228 PortaBass Amplifier 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 high output 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.
PBC228 PortaBass Amplifier 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.
PBC228 PortaBass Amplifier Troubleshooting In the unlikely event that your PBC228 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.
PBC228 PortaBass Amplifier System Block Diagram CHANNEL 1 MID MID FREQ MID MID FREQ CHANNEL 2 SPEAKER SPEAKER 7
PBC228 PortaBass Amplifier Technical Specifications OUTPUT POWER RATING 200 Watts RMS, internal speaker load 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 INTERNAL SPEAKERS (2) 8”Neodymium, 8 ohm, 150 W, 2” vcd LINE POWER REQUIREMENTS 50VA SIZE AND WEIGHT 16.25” W x 16.25” H x 11” D; 31 lbs.
