I wish I had an Orion to measure, but DR accuses Linkwitz of a number of bone-head mistakes, which I doubt, not because I’m a huge fan boy but because the late Dr. Linkwitz was one of the most meticulous speaker designers I’ve ever ever seen. Without measurements I can’t prove it, but there are not a lot of speaker designers I know who took as much care in every aspect of their design as Dr. Linkwitz.
One thing I find kind of curious is his discussion of compensating for the rising impedance of a tweeter: In real life it’s almost never done nor is it needed.
You compensate for the rising impedance of a woofer because not doing so can throw off your low pass filter design. It’s written about here:
https://speakermakersjourney.blogspot.com/2016/12/crossover-basics-zobel_8.html
However, since tweeters have no low pass filter, just a high pass, it’s a moot point, unless you have a truly high output impedance amp (i.e. tube) which can make it seem brighter, but just a tad.
One thing I find kind of curious is his discussion of compensating for the rising impedance of a tweeter: In real life it’s almost never done nor is it needed.
You compensate for the rising impedance of a woofer because not doing so can throw off your low pass filter design. It’s written about here:
https://speakermakersjourney.blogspot.com/2016/12/crossover-basics-zobel_8.html
However, since tweeters have no low pass filter, just a high pass, it’s a moot point, unless you have a truly high output impedance amp (i.e. tube) which can make it seem brighter, but just a tad.