Owner's Manual

8
unwanted low end rumble or stage noise that may nd its way
into your microphone.
The HPF is activated with the side panel DIP switch #3 – the up
position activates the HPF, the down position turns it o. There
are 2 HPF roll o frequencies: 75Hz and 150Hz which are set by
the side panel DIP switch #2.
GAIN
Hz
40 125 20k1k
0dB
-12dB
HIGH PASS FILTER
LOW Control
The Low control is for adjusting the bass frequencies in your
signal. The control xed at 125Hz (+-3dB) corner frequency
(40Hz peak), with a gain range of -10 to +10dB. This is a xed
shelving type control, which means everything below the
125Hz is boosted or cut. It’s all about the bass.
GAIN
Hz
40 125 20k12k
0dB
-10dB
+10dB
LOW SHELF EQ
Also, because certain acoustic instruments (banjo, ddle,
plinkly little whathaveyous) may react better to a higher corner
frequency, we have added a Low control range jumper on the
main PCB. Moving this jumper shifts the Low frequency up to
250Hz (+/-3dB) corner frequency. This is easy to do! We
specically designed ROXi’s chassis to make it easy to access
internal jumpers. Please refer to the jumper diagram and access
procedure on pages
11 and 12.
WARNING Make sure to disconnect the power mains
before opening removing the ROXi top panel to
make jumper adjustments.
MID Controls
The mid range section of ROXi’s equalizer is semi-parametric,
which enables you control the mid range gain and frequency at
a xed Q factor. The range of these controls are:
Gain = +/- 10dB,
Freq Hz setting = 175Hz – 4kHz
Fixed Q factor = 1.2
GAIN
Hz
20
1k
20k
MID EQ
0dB
-10dB
+10dB
Q1.5
In general, you use the mid range EQ control to aect
frequencies in the typical range of the human voice or most
instruments. Turning it down results in a more 'scooped' sound,
turning up a honkier or peaky sound. Heres a good read on
frequencies: https://en.wikipedia.org/wiki/Audio_frequency
High Control
The High control of the ROXi preamplier is set with a 2kHz
(+/-3dB) corner frequency (12kHz peak), with a gain range of
-10 to +10dB. This is a xed shelving type control, which means
everything above the 2kHz is boosted or cut. Simply put, this is
a treble control. If you think your banjo may be too bright, turn
this knob counterclockwise. If you think your guitar needs a
little more bite, turn this knob clockwise. If you’re not sure, then
get down there and start turning it one way or the other until it
sounds better.
GAIN
Hz
20
2.0k
20k12k
HIGH SHELF EQ
0dB
-10dB
+10dB
And the same as the Low control, we have added a High control
range jumper on the main PCB. Moving this jumper shifts the
High frequency down to a 1kHz corner frequency. Please refer
to the jumper diagram and access procedure on pages
11 and
12.
9.11 OUTPUT CONTROLS
Boost
This knob sets the amount your signal is boosted when you
activate the ‘BOOST’ footswitch. Fully counter-clockwise is zero
boost added, fully clockwise adds +10dB of boost. The boost is
after the FX loop and aects both the DI and amp outputs.
As you can probably imagine, if you are using a microphone or
a feedback prone pickup system, adding boost will send you in
to feedback territory. So start small. If you need to boost your
output, start with a gentle boost amount and work your way
upwards. If you start to hear stage feedback or are overloading
the input at the console, then you’ll need to back it o.
ROXi is not responsible for disgruntled soundpeople you may
encounter during the operation of the boost circuit, especially
those you have already borrowed your misplaced IEC power
cable from. Keep those people happy, they control the suck
knob.
Amp Output Level
This knob sets the output level of the amp and tuner outputs
on the rearpanel. If you are using a stage amp, use this control
as your master level. Correct input gain settings for your
sources, with the signal LED showing mostly green, should
not be adjusted to alter your stage amp level. Rather, use this
control to make master level changes.
Troubleshooting advice: if your stage tuner is connected to the
'tuner' jack but not working, make sure your Amp out knob is
turned up suciently.