Rockford Fosgate 250.2 - Manual (Page 18)

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