Hi all,
Well, the Natalie P's are finished (I'll post some pics later)... and I'm trying to build an MTM for myself, based on what I've been trying to learn. Anyway...
I'm having serious problems measuring low end response on my woofers. The way I've been doing it is:
1) Measure woofer with a 6 ms. gate, at 1 m.
2) Take a nearfield response sample at around 84 ms.
3) Splice and join both files at around 500 Hz.
So far, so good. I have what I guess is an infinite baffle frequency response graph.
Now, here comes the troublesome part. How on earth can I get a response that takes into consideration baffle step response?
I read Vance Dickason's book. I know I should take a measurement two meters away from my speakers, on the floor boundary. That didn't work. I suppose there are too many walls around the biggest space I have for that kind of measurement, and the results are swamped with reflections.
I tried using the KHF tool on LSPCad, and I'm even more perplexed. I get horrible looking curves when using the baffle diffraction model, and I have no clue as to how should I use the simple baffle step model (which frequency should I select).
I can't continue modeling my crossover, since I believe my measurements are completely wrong... what I did was...
1) Wire the woofers (WTW configuration) in parallel.
2) Measure at 1M, 6 ms.
3) Take a nearfield response measurement.
4) Splice and join both measurements at 500 Hz.
5) Use the KHF tool to model a baffle diffraction model (considering both woofers as a single source, emanating from the center of the baffle).
6) Use the KHF tool to model a simple baffle step model.
7) Model crossovers for both situations.
8) Compare both crossovers later on.
Somehow, I feel I'm doing things wrong, and this has to be so much simpler than what I'm doing... any ideas on how to properly take into consideration BSC?
Thanks a lot!
Well, the Natalie P's are finished (I'll post some pics later)... and I'm trying to build an MTM for myself, based on what I've been trying to learn. Anyway...
I'm having serious problems measuring low end response on my woofers. The way I've been doing it is:
1) Measure woofer with a 6 ms. gate, at 1 m.
2) Take a nearfield response sample at around 84 ms.
3) Splice and join both files at around 500 Hz.
So far, so good. I have what I guess is an infinite baffle frequency response graph.
Now, here comes the troublesome part. How on earth can I get a response that takes into consideration baffle step response?
I read Vance Dickason's book. I know I should take a measurement two meters away from my speakers, on the floor boundary. That didn't work. I suppose there are too many walls around the biggest space I have for that kind of measurement, and the results are swamped with reflections.
I tried using the KHF tool on LSPCad, and I'm even more perplexed. I get horrible looking curves when using the baffle diffraction model, and I have no clue as to how should I use the simple baffle step model (which frequency should I select).
I can't continue modeling my crossover, since I believe my measurements are completely wrong... what I did was...
1) Wire the woofers (WTW configuration) in parallel.
2) Measure at 1M, 6 ms.
3) Take a nearfield response measurement.
4) Splice and join both measurements at 500 Hz.
5) Use the KHF tool to model a baffle diffraction model (considering both woofers as a single source, emanating from the center of the baffle).
6) Use the KHF tool to model a simple baffle step model.
7) Model crossovers for both situations.
8) Compare both crossovers later on.
Somehow, I feel I'm doing things wrong, and this has to be so much simpler than what I'm doing... any ideas on how to properly take into consideration BSC?
Thanks a lot!
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