# Studio Monitors - Experiments in Directivity
**URL:** https://discourse.midwestaudio.club/t/studio-monitors-experiments-in-directivity/510
**Category:** General
**Tags:** hivi-rt13we
**Created:** [March 18, 2026, 8:15am UTC](https://discourse.midwestaudio.club/t/studio-monitors-experiments-in-directivity/510 "2026-03-18T08:15:22Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Steve\_Lee](https://discourse.midwestaudio.club/u/Steve_Lee)
#### Post date: [March 18, 2026, 8:15am UTC](https://discourse.midwestaudio.club/t/studio-monitors-experiments-in-directivity/510/1 "2026-03-18T08:15:22Z")
Some technical background for those interested in a behind the scenes look: 😳
Having recently increased (narrowing) the directivity of the mid-range dome speaker drivers by employing the wave-guided DM7600’s I found that there was some detail still lacking at the listening/mixing position so I thought; “What if I could narrow the dispersion pattern of the HiVi RT1.3WE Ribbon tweeters”?
So, as an experiment, I split some pipe insulation and painter’s- taped it on the sides of those tweeters to reduce the copious off-axis sound pollution:
[](https://discourse.midwestaudio.club/uploads/default/original/2X/f/f8e2b469111abcedcb8da9d1ba879309db0d6906.jpeg "image")
[image1920×1217 621 KB](https://discourse.midwestaudio.club/uploads/default/original/2X/f/f8e2b469111abcedcb8da9d1ba879309db0d6906.jpeg "image")
Well, it makes as much positive difference in the dynamics/detail/attack of the whole playback experience as it did having just replaced the DM7500’s (Very Wide Dispersion mids) with the much narrower dispersion DM7600 mid-range domes.
[](https://discourse.midwestaudio.club/uploads/default/original/2X/4/4e49d02c08a9bfb72da88d99192398638defe331.jpeg "image")
[393×968 76.5 KB](https://discourse.midwestaudio.club/uploads/default/original/2X/4/4e49d02c08a9bfb72da88d99192398638defe331.jpeg "image")
Narrower directivity is a good thing!! It removes almost all of the frequency response destruction of having wide dispersion which causes speaker cabinet-edge diffraction and reduces sound bouncing off of the walls. (That stuff causes frequency cancellations [muddiness] at your ears).
Channel separation is so much better as well. So defined.
Just like wearing headphones with clean/tight/punchy room filling bass . . . 😎
The power response is excellent and I have had to turn down the SPL as it can make my head /ears hurt with moderate volume levels from 8 feet away with no discernible distortion or noise. (And its only 50WPC into a 6CH amp!). [https://www.acoustas.com/](https://www.acoustas.com/)
😘
Getting better sounding mixes via clean/powerful room-filling-playback makes me play better at times so I will continue the pursuit of this ear satisfaction-thing . . .
Enjoy your day ahead!!
Steev!
😉
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### Author:  [@Hobi](https://discourse.midwestaudio.club/u/Hobi)
#### Post date: [March 18, 2026, 8:42pm UTC](https://discourse.midwestaudio.club/t/studio-monitors-experiments-in-directivity/510/2 "2026-03-18T20:42:24Z")
Are those SB Acoustics SB20pfc woofers?
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### Author:  [@Steve\_Lee](https://discourse.midwestaudio.club/u/Steve_Lee)
#### Post date: [March 18, 2026, 10:32pm UTC](https://discourse.midwestaudio.club/t/studio-monitors-experiments-in-directivity/510/3 "2026-03-18T22:32:22Z")
Yes, absolutely.