I think the QA462 should go on sale later this week or next. Here’s some documentation on how to use the MISC R, L and C Measurement plug-in to make impedance measurements with the QA462.
I would like to add that I had an opportunity to try out the QA462, and used it to measure the impedance of some speakers, and it worked quite well. it gave the same results as I got with the QA40x method using an external amp, sense resistor and a custom cable set I wired together for that. Much simpler with the QA462!
Jeah please dont’t forget me i ordered it already last Year 
I ordered now again on youre webpage !!! so i hope i get one soon
Thank you Matt Q462 Device arieved in Germany
Now i wait for the new Notch Filter Device
I hope you are working already on them …LOL… 
Glad it has arrived! Have you made any measurements yet?
Not Yet, i hope i can Test it soon
Still work on my CNC Stuff and the Enclousure for Youre Devices, I want to get it ready this Year.
\o/
CNC Works now how i want it with ATC, now i need to learn Mastercam, got an Hobby License for privat use with 3 Axses + 2 Indexed 2D and 3D work Path.
Waiting for the Postprocessor they build for my CNC (EdingCNC)
Than i need to build 2 D Apolito Speaker with Wavguide and 2 Ripole Subwoofer
All the Chassis i have already here …LOL
So lots to measure than and to Cut