PURPOSE: To demonstrate the operation af a crossover network.

DESCRIPTION: With white noise playing through the system, the fact that high frequencies come through the tweeter, while the lower frequencies come more through the woofer, can easily be demonstrated. A microphone is held in front of either the woofer or the tweeter, with the microphone signal input into an oscilloscope displaying both the wave shape and the frequency spectrum. (See Demonstration H4-02.)

The photograph at the left shows the wave shape and spectrum of the woofer; the photograph at the right shows the wave shape and spectrum of the tweeter.

SUGGESTIONS:

REFERENCES: (PIRA unknown.)

EQUIPMENT: Audio cart with audiocassette of white noise, Large Advent loudspeakers, microphone with pre-amp, and scope with FFT unit.

SETUP TIME: 10 min.