eddantes
Addicted to Fun and Learning
- Joined
- May 15, 2020
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Hello all,
As a speaker building newb, I am trying to develop the skills to make a good speaker. I built a turnturntable with degree markers for taking measurements and was just trying to run through a quick measurement in my cramped basement to practice. I measured my M22 (horizontal only) with a small window to try to eliminate the reflections in my cramped basement (500-20K).
Comparing the orange measurement with ASR Spinorama I think it looks good from around 2K and up. Under that seems like I have don't have enough resolution. Still the observation isn't about my measurements. It's about a little experiment I ran - applying an F26 felt "cut-out" to the tweeter (double sided tape) and remeasuring.
I was expecting some improvements with difraction. And I think I did get some. See below:
But what I was surprised by are the improvements in directivity. It seems this felt functions a bit like a wave guide. Stock M22 has a directivity issue as can be seen below
I believe I did see that in my measurements (unless I am misunderstanding things):
But here's the surprise once the felt was added:
Not only was each measurement angle smoother in FR, but as response became narrower (as expected) it appears directivity was somewhat corrected.
Am I reading that right? Is that what I am seeing or am I reading into this something that doesn't exist?
As a speaker building newb, I am trying to develop the skills to make a good speaker. I built a turnturntable with degree markers for taking measurements and was just trying to run through a quick measurement in my cramped basement to practice. I measured my M22 (horizontal only) with a small window to try to eliminate the reflections in my cramped basement (500-20K).
Comparing the orange measurement with ASR Spinorama I think it looks good from around 2K and up. Under that seems like I have don't have enough resolution. Still the observation isn't about my measurements. It's about a little experiment I ran - applying an F26 felt "cut-out" to the tweeter (double sided tape) and remeasuring.
I was expecting some improvements with difraction. And I think I did get some. See below:
But what I was surprised by are the improvements in directivity. It seems this felt functions a bit like a wave guide. Stock M22 has a directivity issue as can be seen below
I believe I did see that in my measurements (unless I am misunderstanding things):
But here's the surprise once the felt was added:
Not only was each measurement angle smoother in FR, but as response became narrower (as expected) it appears directivity was somewhat corrected.
Am I reading that right? Is that what I am seeing or am I reading into this something that doesn't exist?