I have a set of boston pro60s 4 ohm that I want to use. The tweeter is a little small so I want to switch it out for the image dynaimcs nx30, also 4 ohm. Would this work? What other info would I need to know if it would work?
You need to be sure that the Image Dynamics tweeter will work well with the crossover point and slope of the Boston Acoustics crossover. If the xover point is too low, or the slope is too shallow, you risk damaging the Image Dynamics tweeter.
And, as Jim said....chances are slim that the BA xover point and slope will provide optimum performance from the Image tweeter.