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The Front Panel
1 32 9 10 11 12 134 5 6 7 8
1. 0dB (INPUT): The signal output from an
instrument (active or passive) or a line level
signal may be connected here by means of a
shielded instrument cable.
2. PAD: This switch, when depressed, atten-
uates the input signal by 15dB. Attenuation
allows the Gain control (#4) to be used in a
more usable (higher) position. If clipping is
indicated with the Gain control way down,
attenuation is needed.
3. PEAK: This LED illuminates when the sig-
nal level into the preamp (excluding the
Graphic EQ) approaches clipping. Adjust the
Gain control (#4) until a strong signal from
your instrument causes this LED to flicker.
NOTE: If the LED illuminates frequently with
the Gain at a low setting, use the Pad (#2) to
attenuate the signal and readjust the Gain.
4. GAIN: Use this control to adjust the level
of the signal entering the preamp stage.
Adjust this control until the Peak LED (#3)
flashes on strong signal peaks (but is not illu-
minated constantly while playing). To obtain
the best signal to noise ratio, set the Gain
control as described above and adjust the
Master control (#8) to obtain the desired vol-
ume level.
5. BASS: Use this control to adjust the low
frequency level of the amplifier. This control
provides 15dB of cut or 13dB of boost at
40Hz. The low frequency output is flat at the
center position.
6. ULTRA MID: Use this control to adjust the
midrange frequency level of the amplifier.
This control provides 13dB of cut or 5dB of
boost at 400Hz. The midrange frequency
output is flat at the center position. Rotate
the control counter clockwise for a “con-
toured” sound (more distant, less midrange
output) or clockwise for a sound which really
cuts through.
7. TREBLE: Use this control to adjust the
high frequency level of the amplifier. This
control provides 21dB of cut or 16dB of
boost at 8kHz. The high frequency output is
flat at the center position.
8. MASTER: Use this control to adjust the
overall output level of the amplifier. For the
lowest possible noise level, adjust the Gain
control as described in #4 and use this con-
trol to obtain the desired volume level. The
Effects Loop and Balanced Out (#20 - 24)
are not affected by the Master control.
9. LIMIT: The SVT450H uses an internal
Optocoupler Limiter to assist in keeping the
amplifiers output “clean” at extreme volume
levels. (All amplifiers may begin to clip their
output signals as they approach maximum
output levels, resulting in potentially damag-
ing distortion.) To engage the Limiter,
depress this switch. The adjacent LED illu-
minates when the limiter circuit is activated,
indicating that the amplifier is nearing full
output and the limiter is keeping peak signals
from clipping the output.
10. EQ ON: This switch, when depressed,
activates the Graphic EQ. The adjacent LED
illuminates when the EQ is active.
11. GRAPHIC EQUALIZER: Use these slid-
ers to control the amplitude of the frequen-
cies indicated below each control. The cen-
ter position of each control is flat: sliding the
control upward increases the output level of
that frequency; sliding the control downward
decreases it.
12. ON: This LED illuminates when the
amplifier is on.
13.POWER: Use this switch to turn the
amplifier on (top of the switch depressed)
and off (bottom of the switch depressed).
SVT450H Bass Amplifier
4


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