I have seen frequency response plots of two way speaker systems with the tweeter hooked up each way. One shows a dramatic downward spike at crossover. Almost complete cancellation. In fact, this is the best way to determine the exact crossover frequency.
However, this effect is probably seen because the microphone is located at a small fixed spot in space, so that the distance to the two drivers is fixed. For real-world listening, polarity of the tweeter does not seem to make a lot of difference. Best idea is to try it both ways.
However, this effect is probably seen because the microphone is located at a small fixed spot in space, so that the distance to the two drivers is fixed. For real-world listening, polarity of the tweeter does not seem to make a lot of difference. Best idea is to try it both ways.