Table 2.
12 dB/Octave
Blank Crossover Card
Component Values
Resistors are all % W, 5% tolerance. Capacitors are all 5%
tolerance, metalized polyester.
WARNING: This section of the manual contains service instructions for
use by qualified service personnel only.
Crossover
Frequency
(Hz)
Capacitors
C1-C5'
(MF)
Resistors
R1-R5'
(kn)
50
.22
10
70
.22
7.5
100
.22
4.7
200
.12
4.7
300
.082
4.7
400
.055
5.1
600
.039
4.7
700
.032
5.1
900
.027
4.7
1 100
.022
4.7
1500
.012
6.2
2000
.012
4.7
2500
.0082
5.6
3000
.0068
5.6
3500
.0068
4.7
4000
.0056
5.1
4500
.0039
6.2
5500
.0033
6.2
6000
.0033
5.6
6500
.0033
5.1
7500
.0027
5.6
8000
.0027
5.1
8500
.0012
11
9000
.0022
5.6
9500
.0012
10
10000
.0022
5.1
The component values for other crossover frequencies can be calcu-
lated using the formula RC= where R is the resistance in kn,
C is the capacitance in nF. and F is the frequency in Hz The rec-
ommended minimum value for R is 4.7 kO.
Figure 6. 12
dB/Octave
Blank
Crossover
Card
(JBL
Model
52-5120)
Component
values
for the
various
frequencies
are
listed
in
Table
2.
Components
should
rest
against the printed circuit
board.
Leads
should
be
soldered
and cut
flush.
Table 3.
18 dB/Octave
Blank Crossover Card
Component Values
Resistors are all % W, 5% tolerance. Capacitors are all 5%
tolerance, metalized polyester.
Crossover Frequency
Capacitors
Resistors
30 Hz
CV-N/A
RV-N/A
(High Pass
Only]
C2'-N/A
R2'-N/A
C3'-N/A
R3'-N/A
C4'-.33 uF
R4'-11 kn
C5'-.33 nF
R5'-4.3 kn
C6'-.33 MF
R6'-75 kn
250 Hz
C1'-.015 MF
R1
'-5.6 kn
C2'-.39
M
F
R2'-5.6 kn
C3'-.022 ^F
R3'-5.6 kn
C4'-.039
M
F
R4'-12 kn
C5'-.039 nF
R5'-4.7 kn
C6'-.039 uF
R6'-82 kn
500 Hz
Same as JBL Crossover Card 51-5132.
See Table 5. for values.
800 Hz
Same as JBL Crossover Card 51-5133.
See Table 5. for values.
1200 Hz
C1 '-.039
M
F
R1 '-4.7 kn
C2'-.10
MF
R2'-4.7 kn
C3'-.0056
MF
R3'-4.7 kn
C4'-.0082 MF
R4'-12 kn
C5'-.0082
M
F
R5'-4.7 kn
C6'-.0082
M
F
R6'-82 kn
5500 Hz
C1 '-.0068
M
F
R1 '-5.6 kn
C2'-.018 uF R2'-5.6 kn
C3'-.001 JJF
R3'-5.6 kn
C4'-.0018 MF
R4'-12 kn
C5'-.0018
m
F
R5'-4.7 kn
C6'-.001 8 fjF
R6'-82 kn
8000 Hz
C1'-.0056 uF
R1
'-4.7 kn
C2'-.015 iiF
R2'-4.7 kn
C3'-820 pF
R3'-4.7 kn
C4'-.0012 uF
R4'-12 kn
C5'-.0012
M
F
R5'-4.7 kn
C6'-.0012 ,iF
R6'-82 kn
10
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