Ampeg Micro-VR User Manual

4
MICRO-VR Bass Guitar Amplifier
The Front Panel
1. 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.
2. –15 dB PAD: Pressing this switch in
reduces the input signal by 15 dB, to
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 the Peak LED [3] comes
on regularly. It will reduce the chance
of overdriving the preamplier stage,
and allow more usable range and ne
adjustment of the Gain control.
3. PEAK LED: This red warning LED may
come on 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 [2].
4. GAIN: This varies the amount of signal
driving the preamplier. If a small
clockwise rotation from minimum
leads to overloading and the Peak LED
coming on, try engaging the –15 dB
Pad to provide more usable range with
the Gain control.
5. BASS: Use to adjust the low frequency
level of the amplier. This provides up
to 14 dB of boost, or 12 dB of cut, at 40
Hz. The low frequency output is at at
the center position�
6. MIDRANGE: Use to adjust the midrange
frequency level of the amplier. This
provides up to 5 dB of boost, or 13
dB of cut, at 500 Hz. The midrange
frequency output is at at the center
position� Rotate the control counter-
clockwise for a “contoured” sound
(more distant, less midrange output) or
clockwise for a sound that really cuts
through�
7. TREBLE: Use to adjust the high
frequency level of the amplier. This
provides up to 19 dB of boost, or 25
dB of cut, at 8 kHz. The high frequency
output is at at the center position.
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Ampeg Micro-VR Specifications

Power Output

output power rating at 8 Ω	150 Watts RMS
output power rating at 4 Ω	200 Watts RMS

Signal and Gain

signal to noise ratio	72 dB
maximum gain	62 dB

Tone Controls

bass control	+14/–12 dB @ 40 Hz
midrange control	+5/–13 dB @ 500 Hz
treble control	+19/–25 dB @ 8 kHz

Power Requirements

power requirement for 100–120 VAC	150 W
power requirement for 220–240 VAC	150 W
frequency	50–60 Hz

Weight and Dimensions

size (H x W x D) in inches	7.5 in x 12 in x 10 in
size (H x W x D) in millimeters	190 mm x 305 mm x 254 mm
weight in pounds	9.9 lb
weight in kilograms	4.5 kg