While I use this to boost the frequencies where my hearing is bad, this will work as a very good super tweeter that provide super clean low distortion output up to 20khz. If you are older, like most audiophiles are, bumping up the high frequency output can help make up for natural hearing loss that aging has gifted us.
Mine are driven from my miniDSP 4x10 mainly to time align them to my main speakers, but also acts as the crossover. I need to time align them because I have these placed closer to my sitting position than my main speakers. To use these as normal super tweeters, you would place them beside your main speakers at the same distance from the listening position. As a bonus, placing them farther out (toward the sidewalls) away from you main speakers can increase the width and clarity of the soundstage.
With the horn the SB Audience Bianco 44CDK can operate cleanly from about 800Hz all the way up to 20khz, covering a huge chunk of the audible range. I have mine set to cross at 1khz with an 12db per octave filter to gradually boost the frequencies above 500hz.
If you want to play with it and have a 3D printer, you can download the print files here:
https://www.dropbox.com/scl/fi/vtc3ko...

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