John Kreskovsky has release a new version of his design guide updated to the latest V13 software. It cost $9.95 USD for a CD to be shipped to you.Music and Design
Measuring T/S Parameters (Web based online demo)
Measuring T/S Parameters (Standalone Flash EXE File)
Measuring Impedance of Finished Speaker (web based online demo
Measuring Impedance of Finished Speaker (standalone Flash EXE File
Creating Mic Calibration File (Web based online demo)
Creating Mic Calibration File (Standalone Flash EXE File)
In this demonstration, I walk you through the process of measuring the frequency response of a finished loudspeaker using Soundeasy. I use the near and far field measurement technique.
Please note my adding of near port and near driver is not accurate in this demonstration. At the time i made this demonstration i was using a cheap USB sound card that was not capturing the low end data accurately. To merge near driver and near port data you must line up the tails of each first then add them. You will see my driver data does not include a good dip like it should at the same frequency as the port peak
See this picture Media:nearVentDriver.jpg of theoretical near port and driver to see how the near driver and port should be aligned. See how the peak in the vent measurement is directly over the dip in the driver measurement. Also notice the tails (0Hz - 20Hz) are nice and overlapping. This is what you want to look for when you add near driver and near woofer. Now keep in mind i have never gotten measurements that look perfect like this image. So align the tails as best as you can
Measuring The Frequency Response Of A Finished Spea(Web based online demo)
Measuring The Frequency Response Of A Finished Spea (Standalone Flash EXE File)