Brian Steele
Member
Thread Starter
- Joined
- Aug 16, 2017
- Posts
- 18
REW seems to calculate different values for the semi-inductance ("blocked impedance") parameters. I performed an impedance measurement with REW, used its "Thiele-Small Parameters" tool to calculate the t/s parameters, then exported the impedance data to a file, imported it into the "Semi-Calc V3" workbook and did the LS-fit there. The results given for the semi-inductance parameters are VERY different.
Now, I'm tending to believe that the values calculated by the workbook are more correct because it provides the modeled impedance curve based on the calculated values for comparison purposes while REW does not. But I am curious about the fairly large differences.
The "Semi-Calc V3" workbook is available here - https://www.diysubwoofers.org/misc/semi-inductance.html. There's more information about its source and development here: https://www.diyaudio.com/community/...e-model-incorporating-semi-inductance.329096/
Now, I'm tending to believe that the values calculated by the workbook are more correct because it provides the modeled impedance curve based on the calculated values for comparison purposes while REW does not. But I am curious about the fairly large differences.
The "Semi-Calc V3" workbook is available here - https://www.diysubwoofers.org/misc/semi-inductance.html. There's more information about its source and development here: https://www.diyaudio.com/community/...e-model-incorporating-semi-inductance.329096/
