Rockford Fosgate AF/4HD, Руководство по установке

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BUILDING A CUSTOM CROSSOVER MODULE
If you want a frequency not available in the standard Rockford modules (which are available at
half-octave intervals from 50 Hertz to 9,000 Hertz), you can, in fact, build your own module.
You will need:
1. An 8-pin DIP component carrier
2. Soldering equipment
3. A source of 1/4-watt or 1/8 watt resistors. (Preferably 1% resistors)
Determine the resistance value you need for the frequency you want from the formula below.
R=
1
O H M ’ s
1 .38 (10- 7 )f
“f" is the frequency that you want.
FREQUENCY RESISTOR VALUES
The following table was tabulated by using the formula that was given earlier.
Frequency Resistance
Frequency Resistance
50 Hz
70
Hz
100 Hz
150 Hz
200
Hz
275
Hz
400
Hz
550 Hz
750
Hz
150k O h m s
1 OOk Ohms
75k Ohms
47k Ohms
36k Ohms
27k Ohms
18k Ohms
13k Ohms
9.7k O h m s
80
Hz
1k Hz
1.5k Hz
2k Hz
3k Hz
4.5k Hz
6.5k Hz
9k Hz
13k Hz
9.1 k Ohms
7.5k O h m s
4.7k O h m s
3.6k O h m s
2.4k O h m s
1.6k O h m s
1.1k Ohms
820
Ohms
55 7
Ohms