On an aside note, this is why only first order is possible. A high order filter even with all positive polarity won't be able to produce a proper step response.
https://www.flickr.com/photos/185616271@N05/49107462151/in/album-72157711891600612/
Also first order time coherent xover tend to be very complicated which is somewhat counter intuitive. On the other hand, a 2nd order, 12db roll off xover is fairly simple and no doubt would save a lot in component cost. I am sure that's part of the reason why most manufacturers are probably shy away from first order filter designs.
https://www.flickr.com/photos/185616271@N05/49106953358/in/album-72157711891600612/
https://www.flickr.com/photos/185616271@N05/49107462151/in/album-72157711891600612/
Also first order time coherent xover tend to be very complicated which is somewhat counter intuitive. On the other hand, a 2nd order, 12db roll off xover is fairly simple and no doubt would save a lot in component cost. I am sure that's part of the reason why most manufacturers are probably shy away from first order filter designs.
https://www.flickr.com/photos/185616271@N05/49106953358/in/album-72157711891600612/