The Front Panel
INPUT: The signal output from an instrument (active or passive) may be connected to this 1/4" input by means of a shielded instrument cable.
PEAK/MUTE LED: This red warning LED will come on if: the mute switch is engaged, or if the input signal is too high, the gain control is set too high, or there is too much boost from the bass, midrange and treble controls. If it comes on regularly, even when these controls are low, try engaging the –15 dB pad.
MUTE: Press this switch in to mute the signal. The peak/mute LED will illuminate when this switch is engaged.
–15 dB: Press this switch in to reduce the input signal by 15 dB and compensate for higher output sources. This attenuation is suited for use with basses that have active electronics or high-output pickups. Use this pad if you notice that the peak/mute LED comes on regularly. It will reduce the chance of overdriving the preamplifier stage, and allow more usable range and fine adjustment of the gain control.
THRESH LED: This lights when the signal level is above the compressor threshold and gain reduction is active.
SVT-7 PRO Bass Guitar Amplifier
12 3 45
13 14 15
COMPRESSION: This controls the amount of signal compression. At the fully counterclockwise position there is no compression; at the fully clockwise position the compression ratio is 10:1. The sonic effect of compression is reduced dynamics, increased sustain and a more consistent output level regardless of how light or hard the strings are played. The compressor is very transparent - that is, there is very little effect on the tone of your instrument.
GAIN: This varies the amount of signal driving the preamplifier. If a small clockwise rotation from minimum leads to overloading and the peak LED illuminating, try engaging the –15 dB pad. This will give more usable range with the gain control.
ULTRA HI: This switch, when engaged, enhances the amount of high frequency output by 9 dB at 8 kHz.
ULTRA LO: This switch, when engaged, enhances the amount of low-end output by 2 dB at 40 Hz and
10 dB cut at 500 Hz.
BASS: Use this to adjust the low frequency level of the amplifier. This provides up to 12 dB of boost, or 12 dB of cut at 40 Hz. The low frequency output is flat at the center position.