Xcard Resistor Chart - Rockford Fosgate 50.1 Operation & Installation Manual

XC R
ARD ESISTOR
Our tests have shown that using 0.047mf capacitors for frequencies below 100Hz, and 0.022mf capacitors for frequencies
above 100Hz, result in more linear crossover control. Refer to the Specifications page to determine the capacitor value of
each supplied XCard.
Butterworth Alignment Q = .707
1% resistors used with 0.047mF capacitors
Frequency R1
20Hz 169k
25Hz 133k
30Hz 110k
35Hz 95.3k
40Hz 84.5k
45Hz 75k
50Hz 68.1k
55Hz 61.9k
60Hz 56.2k
65Hz 52.3k
70Hz 48.7k
75Hz 45.3k
80Hz 42.2k
85Hz 40.2k
90Hz 37.4k
200Hz 16.9k
300Hz 11.3k
400Hz 8.45k
500Hz 6.65k
600Hz 5.62k
700Hz 4.75k
800Hz 4.22k
900Hz 3.74k
1.0kHz 3.40k
1.2kHz 2.80k
2kHz 1.69k
3kHz 1.10k
4kHz 845
5kHz 665
6kHz 562
7kHz 487
8kHz 422
C
HART
R2
169k
133k
110k
95.3k
84.5k
75k
68.1k
61.9k
56.2k
52.3k
48.7k
45.3k
42.2k
40.2k
37.4k
16.9k
11.3k
8.45k
6.65k
5.62k
4.75k
4.22k
3.74k
3.40k
2.80k
1.69k
1.10k
845
665
562
487
422
– 15 –
Butterworth Alignment Q = .707
1% resistors used with 0.022mF capacitors
Frequency R1
20Hz 357k
25Hz 287k
30Hz 237k
35Hz 205k
40Hz 178k
45Hz 162k
50Hz 143k
55Hz 130k
60Hz 121k
65Hz 110k
70Hz 102k
75Hz 95.3k
80Hz 90.9k
85Hz 84.5k
90Hz 80.6k
200Hz 35.7k
300Hz 23.7k
400Hz 17.8k
500Hz 14.3k
600Hz 12.1k
700Hz 10.2k
800Hz 9.9k
900Hz 86k
1.0kHz 7.15k
1.2kHz 6.04k
2.0kHz 3.57k
3.0kHz 2.37k
4.0kHz 1.76k
5.0kHz 1.43k
6.0kHz 1.21k
7.0kHz 10.2k
8.0kHz 909
a O
p
d
e
v
r
a
a
n
t
c
i
e
o
d n
R2
357k
287k
237k
205k
178k
162k
143k
130k
121k
110k
102k
95.3k
90.9k
84.5k
80.6k
35.7k
23.7k
17.8k
14.3k
12.1k
10.2k
9.9k
86k
7.15k
6.04k
3.57k
2.37k
1.76k
1.43k
1.21k
10.2k
909