B3/B328/B3158 Bass Amplifier
The Front Panel Controls and Their Use
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| GAIN | DRIVE | BASS | ULTRA MID | TREBLE | EQ | 40Hz | 80Hz | 150Hz | 300Hz | 600Hz | 900Hz | 2kHz | 5kHz | 8kHz | BALANCE |
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| ON |
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| MASTER |
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| +12dB |
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| FLAT |
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| LIMIT | ON |
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| PAD | PEAK |
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| LO | HI |
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| PULL |
| LOW HIGH |
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| EQ ON |
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1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
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| 11 | 12 | 13 | 14 | 15 |
1.INPUT: The signal output from an instru- ment (active or passive) or a line level signal may be connected here by means of a shield- ed instrument cable.
2.
3.PEAK LED: This LED flashes when the signal level into the preamp approaches clip- ping. 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
ed clockwise, signal level is increased to drive the preamp harder (into distortion). The tone of the signal is also changed to provide a smoother overdrive. (The tone controls may have to be readjusted to obtain the overall desired tone.) The Gain control (#4) and - 15dB Pad (#2) interact with the Drive control. For greater overdrive, the Pad switch should be out and the Drive control fully clockwise. Use the Gain control to set the amount of overdrive desired. The Peak LED (#3) will illu- minate steadily when the amp is used in this manner.
6. BASS: This is the primary low frequency control which allows for 12dB of cut or boost at 50Hz.
7. ULTRA MID: This is the primary midrange control. Rotate this control to the left of center
for a “contoured” sound (more distant, less NOTE: There are two Limit LEDs only on the midrange output) or to the right of center for a
4. GAIN: This serves as the input level con- |
trol for the amplifier. For the best signal to |
pronounced (more up-front) tone.
B3158: one for its low frequency power amp and one for its high frequency power amp.
noise ratio set this control so the Peak LED |
(#3) flashes when you strike a string fairly |
hard. |
5. DRIVE: This control is used to overdrive |
the preamp in order to get various harmonic |
enhancement or distorted sounds. In the fully |
counterclockwise position the preamp is in |
the cleanest condition. As the control is rotat- |
8. TREBLE: This is the primary high frequen- | 14. POWER ON LED: This LED indicator illu- | |
cy control which allows for 22dB of cut or | ||
minates when the POWER switch (#15) is ON. | ||
17dB of boost at 5kHz. | ||
15. POWER SWITCH: This | ||
9. EQ ON LED: This LED illuminates when | ||
er switch applies the power to the amplifier. | ||
the EQ is turned on by either the Master | ||
The amp is ON when the top of the switch is | ||
Control (#11) or a footswitch (#24, rear | ||
depressed, OFF when the bottom of the | ||
panel). | ||
switch is depressed. | ||
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1.ENTRADA: Conecte aquí su guitarra de bajos usando un cable blindado para instrumentos.
2.TERMINAL DE
3.DIODO (LED) DE PICOS: Este LED se ilumi- nará cuando cualquier etapa de preamplificación se encuentre cerca del punto de sobreimpulso. Ajuste el control de Ganancia (#4) hasta que una señal fuerte de su bajo cause un parpadeo de este LED.
NOTA: Si el LED permanece iluminado aún con la | mentará para impulsar el preamplificador con |
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Ganancia en una posición baja, utilice la Terminal | mayor fuerza (hacia la distorsión). El tono de la |
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de | señal también cambia para proveer un sobreimpul- |
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reajuste la Ganancia. | so más suave. Tal vez tengan que ajustarse los |
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4. GANANCIA: Esto sirve como el control de | controles de tono para obtener el tono general |
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nivel de entrada para el amplificador. Para lograr la | deseado. El control de Ganancia (#4) y la Terminal |
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mejor relación de | de |
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que el LED de Picos (#3) parpadee cuando usted | Impulso. Para un sobreimpulso mayor, el interruptor |
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pulse con fuerza alguna cuerda. | de la Terminal debe estar apagado y el control de |
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5. IMPULSO: Este control se usa para sobreim- | Impulso totalmente a favor de las manecillas del |
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reloj. Use el control de Ganancia para fijar la canti- |
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pulsar el preamplificador a fin de conseguir varios |
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dad deseada de sobreimpulso. El díodo LED de |
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realces armónicos ó sonidos de distorsión. En la |
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Picos (#3) se iluminará en forma constante cuando |
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posición totalmente contraria a las manecillas del |
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el amplificadora se utilice de esta manera. |
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reloj, el preamplificador se encontrará en la posición |
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6. BAJOS: Esta perilla sirve como el control pri- |
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más “limpia”. Conforme el control se gire a favor de |
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las | mordial para las frecuencias bajas. Esto permite un |
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| rango de 8dB de recorte ó de refuerzo a 50Hz. | 3 |
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