SVPCL Bass Preamp
The Front Panel:
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1.INPUT: Connect your instrument here by means of a shielded instru- ment cable.
2.PAD: This switch, when depressed, attenuates the input signal by 10dB. Attenuation allows the Gain control (#4) to be used at a higher setting. If clipping is indicated with the Gain con- trol close to fully counter clockwise, attenuation is needed.
3.MUTE: This switch, when depressed, mutes the signal at all out- puts except the Tuner Output (#21).
4.GAIN: Use this control to adjust the level of the signal going into the pre- amp. For the best signal to noise ratio, set this control so the Peak LED (#5) flashes occasionally during loud pas- sages.
5.PEAK: This LED flashes when the signal level into the preamp approach- es clipping. When the Mute switch (#3) is depressed, this LED remains illumi- nated as a visual indicator that the Mute function is active.
6.ULTRA LOW: Use this
1:Off – flat frequency response
2:Sub Cut – reduces frequencies below the bass range to protect the speakers
3:Low Cut Classic – provides a low cut equal to the original SVT
4:Ultra Low Classic – contours the sound to emphasize the low end just like the original SVT
5:Ultra Low Modern – provides a substantial low end boost
7.ULTRA HIGH: This switch, when depressed, adds about a 16dB boost to the high frequencies around 8kHz, depending on the setting of the Gain control (#4).
8.BRIGHT: This switch, when de- pressed, adds a 6dB boost to the high frequencies at 3kHz.
9.BASS: Use this control to adjust the low frequency output level. This control provides
10.MID: Use this control to adjust the midrange frequency output level. This control provides
11.MID FREQ: Use this control to select the center frequency for the Mid control (#10), as follows:
1:220Hz
2:450Hz
3:800Hz
4:1.6kHz
5:3kHz
12.TREBLE: Use this control to adjust the high frequency output level. This control provides
13.MASTER: Use this control to adjust the overall output level of the preamp.
14.POWER: Use this switch to turn the preamp on (top of the switch depressed) and off (bottom of the switch depressed). The adjacent Ampeg logo illuminates green when the preamp is on and the tubes are warmed up.
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