4110 & 8110 Front Panel Channel Blocks
+48V
8
PAD
INPUT
INPUT
OUTPUT
LEVEL
0
1
2
3
4
5
6
7
8
9
10
GAIN
0
1
2
3
4
5
6
7
8
9
10
2.0K
LINE
MIC
500
OFF
1
2
SHAPE
INPUT
2.0K
LINE
MIC
500
47K
2.0M
HI-Z
INPUT
4
OUTPUT
+48V
PAD
LEVEL
0
1
2
3
4
5
6
7
8
9
10
GAIN
0
1
2
3
4
5
6
7
8
9
10
OFF
1
2
SHAPE
Figure 3:
4110 & 8110 Front Panel Channel Blocks
Note: The 8110 Front Panel Controls are identical to the 4110 except the Hi-Z Input position is
eliminated on the INPUT control knob.
Rotary Controls
Input Select
The Input Select switch is the bottom knob on the left side of the channel block. It determines which
input is active: Mic, Line, or Hi-Z. Within both the Mic and Hi-Z areas, the switch includes two settings
to select different input impedances.
•
Mic: Selects the signal from the rear-panel, balanced, MIC INPUT XLR connector. The impedance
for the MIC INPUT can be set to 500
Ω
or 2K
Ω
. Switching between these two positions while
listening to a connected microphone may reveal a different tonal quality and / or gain. A typical
mic preamplifier should have an input impedance equal to about 10 times the mic output
impedance. For example, if your mic has an output impedance between 150
Ω
and 200
Ω
, set the
switch to the 2K position. However, since making music is not necessarily about adhering to
technical specifications, feel free to experiment with the settings to attain the desired sound. You
will not harm your microphone or the preamp.
•
Line: Selects the signal from the rear-panel, balanced, LINE INPUT
XLR connector. LINE INPUT has
an input impedance of 6.5 k ohms and is intended to accommodate mixers, tape machines, other
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