Vintage Revolution Acoustic Box II Owner's Manual page 8

Channel 2
Channel 2 (Ch2)
Ch2 has a hybrid XLR -1/4" input connector. It is designed to connect either
active or passive microphones via an XLR balanced cable or a mono jack
cable. The +48V phantom can be activated/deactivated by the Pref. button
on the low left corner of the LCD. If you are properly connected, your signal
strenght will be monitored via the Ch2 green LED. If you intend to use the XLR
keep the switch on Mic otherwise select the switch to Line and insert a Jack
on Ch2. XLR input can be adjusted with +10dB gain selector. This gain
selector will not affect the Jack Line settings.
Level control (Ch2)
The LEVEL knob controls the output signal of the Ch2. When you are tuning
the Ch2's equalizer or if you do not intend to use Ch1 keep the LEVEL of Ch1
to minimum.
Notch filter
The programmable NOTCH filter on Ch2 can be activated/deactivated by
using the button placed on top of the notch frequency tuner. If you need to
use the notch filter press the button above the knob and tune the frequency
(50Hz-250Hz).
Parametric equalizer (Ch2)
Ch2 is equipped with a parametric Eq designed to control the low/mids of
your mic. It operates between 350 to 4KHz by correcting within +/-12dB.
High pass filter ( )
Ch2 is equipped with a 2nd order high pass filter with cut off frequency 100Hz.
The intended use is to reduce the proximity effect typical of condenser micro-
phones.
Phase button Ch2 (ø)
The phase button allows for 180° phase shift between Ch2 and Ch1 when the
switch is engaged. Use this Phase button to determine the correct phase
between channel two and one. To do so compare the sound produced by
activating and deactivating the Phase button. The Phase configuration that
produces the more natural sound is the correct setting.
Low pass shelving filter ( )
When the filter is engaged, it attenuates Ch2 of 6dB in the range 1KHz-20KHz.
This low pass filter is very handy for those who need high volume on stage.
Therefore, the advantage of this filter is to reduce, when engaged, the con-
tribution of the unwanted signals coming from the other instruments/noise
present on the stage. By reducing the mic contribution in this frequency range,
the filter allows higher volume with less feedback.
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