What type of crossover is appropriate for a tweeter?

A high-pass crossover is suitable for a tweeter because it allows frequencies above a certain cutoff point to pass through while attenuating lower frequencies that can cause distortion or undesirable output in the tweeter. In this case, a cutoff frequency of around 2.5kHz is optimal for most tweeters, as it is above the range where their performance is effective, ensuring that they reproduce the higher frequencies clearly and without strain.

Using a low-pass crossover, like a 120Hz or 30Hz setting, would not be appropriate for a tweeter because those low frequencies can cause the tweeter to run inefficiently, potentially damaging it and resulting in weakened sound performance. Likewise, a band-pass crossover centered around 500Hz would restrict the tweeter's operation to a very narrow frequency range that does not complement the device's designed purpose. Therefore, the high-pass crossover at 2.5kHz is ideal, allowing tweeters to function within their optimal frequency range effectively.