5
Inserting the resistor network
The factory preset frequency is 20 kHz. If there is a
resistor network already installed in the socket, carefully pull it straight out. Insert the pins of
the new resistor network into the socket holes and carefully press the network into the socket.
Be careful to avoid bending the pins of the resistor network. Orientation of the resistor
network is unimportant, as long as all 8 pins are well seated in the socket.
CD Horn Equalization (Boost)
In addition to enabling the 100 Hz high-pass filter at
J202, if you opt for CD horn equalization you must place a jumper at J203 as well. The MPC-
X100 offers two equalization curves for CD horn correction:
For +6 dB of boost at 20 kHz, place the jumper across pins 1 and 2 of J203.
For +10 dB of boost at 20 kHz, place the jumper across pins 2 and 3 of J203.
To bypass the CD horn equalization, do not place a jumper across any pins on J203.
IV. Typical configurations
Subsonic Filter (Infrasonic Filter)
Applications:
Subsonic filters are commonly used in sound installations to filter out rumbles
and other inaudible or unwanted low frequency signals and to protect speaker tuned vented
speakers from damage due to excessive energy below the tuning frequency.
For a subsonic filter, determine the lowest useable frequency that the speaker can safely
handle and set the
high-pass
filter to that frequency. Typical subsonic filters are set at 50 Hz,
40 Hz, 30 Hz or 20 Hz.
Program settings:
1 Set J102 to enable the high-pass filter by placing jumper across pins 2 and 3.
2 No jumper on J103.
3 Insert proper resistor network in RN104 socket.
2
&
1
s
n
i
P
3
&
2
s
n
i
P
e
n
o
N
n
o
i
t
c
n
u
F
r
e
d
a
e
H
:
1
l
e
n
n
a
h
C
1
0
1
J
X
2
0
1
J
X
2
0
1
J
X
3
0
1
J
X
:
2
l
e
n
n
a
h
C
1
0
2
J
X
1
0
2
J
X
2
0
2
J
X
2
0
2
J
X
t
s
o
o
b
n
r
o
h
D
C
e
l
b
a
s
i
D
3
0
2
J
X
z
H
k
0
2
@
B
d
6
+
,
t
s
o
o
b
n
r
o
h
D
C
3
0
2
J
X
z
H
k
0
2
@
B
d
0
1
+
,
t
s
o
o
b
n
r
o
h
D
C
J203
X
All operation
All operation
Bypass subsonic
Enable subsonic
(subwoofer)
Bypass ultrasonic
Enable ultrasonic
Bypass 100 Hz high-pass
Enable 100 Hz high-pass
Bridged mono
J201, J202
J203
X
X
The table at left is a summary of the jumper
settings for the MPC-X100.
