This one has been in the works for a while. The DATS v3 is a product that I strongly, truly believe everyone should have in their toolbox. There are even many questions and discussions here on ASR that would be immensely helped by a simple impedance sweep.
In this video I discuss the often used purpose of measuring a drive unit's T/S parameters as well as provide some other examples of how you can easily find internal enclosure resonance as well as a few other highlights.
I also encourage you to stay through until the end.
If you would like to purchase one while helping me fund my channel and tools I use for measuring loudspeakers (such as the Klippel NFS) please consider doing so by using one of the affiliate links below:
Amazon: https://amzn.to/2LMEGQH
Parts-Express: https://www.anrdoezrs.net/links/7732...807?quantity=1