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Remove the MQ108 cover to access all the programming features. The Mclntosh MQ108
HOW TO
has 14 programmable filter bands (seven in each channel). Each filter can be programmed
PROGRAM
for frequency and bandwidth. Each filter is also adjustable for amplitude boost or cut. The
THE MQ108
frequency, bandwidth and amplitude of each programmed section is determined by the selec-
tion of capacitors and the position of the level control. The capacitors required by the MQ108
are of standard values and readily available.
Each filter section is identified by number, which includes a detented level control and two
capacitor plug-in locations, A and B. When the control is set at the detented position, the
filter is electrically flat. When the desired capacitors are inserted and the control is turned
clockwise, the filter boosts. When the control is turned counterclockwise, the filter cuts.
Capacitors A and B program the frequency and bandwidth of the filter. Capacitor values
are determined by using the FREQUENCY PROGRAMMING table on the chart included in
this manual and also attached to the inside of the MQ108 cover. If no capacitors are inserted
in a filter section, turning the control will have no effect. Both capacitors must be used in
the same section for proper operation.
FREQUENCY (Hz)
Capacitors for frequencies that are not indicated on the enclosed chart can be determined
by the following formula.
8
NARROW FILTER
CAPACITOR
A
1.0
20
25
1.0
31.5
1.0
.56
40
50
.56
63
.39
80
.22
100
.22
125
.18
160
.12
200
.12
250
.12
.082
315
400
.056
500
.056
.039
630
800
.022
1000
.022
CAPACITOR
CAPACITOR
B
A
.39
.27
4.7
.18
.18
.12
2.2
.12
.12
.082
1.0
.056
.056
.039
.56
.022
.022
.018
.012
.012
.012
.0082
WIDE FILTER
CAPACITOR
B
.056
.022
.018
.0082
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