Wayne Parham Messages: 18791 Registered: January 2001
Illuminati (33rd Degree)
In the case of a passive crossover, the order is important because the source impedance of one component, device or circuit is the load impedance of the one preceding it. For example, in the tweeter circuit of the π crossover, resistance values R1 and R2 are set precisely so that the Q of the high-pass filter preceding them is slightly underdamped. This generates a shelved response curve, so that the first couple of octaves are flat before HF augmentation begins.
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