.
FREQUENCY CONTROL: With an active crossover, frequency control is not dependent on
the impedance of the speaker.
.
CROSSOVER SLOPE: In an active 12dB per octave crossover, slope is incorporated along with
the ability to make it 24dB per octave.
.
FREQUENCY SELECTION: With an active crossover, frequency selection is infinite.
CHOOSING CROSSOVER FREQUENCIES
Choosing the correct crossover frequency can be difficult. Consideration of the following items will
help you make your selection easier.
OPERATING RANGE OF SELECTED DRIVERS:
Manufacturers will usually provide information about the operating range of their drivers so that you
can choose a crossover frequency within that range to obtain maximum performance.
DESIRED POWER HANDLING OF DRIVERS:
High-pass crossovers can be changed to increase the power handling of a given driver. For example,
a tweeter may handle 50 watts at 10 kHz, but only 2.5 watts at 4 kHz.
DESIRED RESPONSE OF SYSTEM:
Most autosound installations introduce a number of acoustical problems that can sometimes be
corrected with careful attention to your crossover frequencies. The use of 1/3 octave RTA can help
you determine if a problem exists and at what frequency.
The following crossover frequencies work the best with Rockford Fosgate drivers, and provide a good
foundation for any autosound system.
Woofer
100 Hz Low-pass
Midbass
100 Hz High-pass-275 Hz Low-pass
Midrange
275 Hz High-pass-8 kHz Low-pass
T w e e t e r
8 kHz High-pass
NOTE: Depending on the desired response of a given system, crossover frequencies can be
varied accordingly.
