The tutorial is the Help file. Go to the section on entering new driver data parameters and follow it explicitly and it works fine.
The condensed version is this:
LOAD THESE INTO WIN ISD IN THIS ORDER TO PROPERLY ENTER NEW DRIVERS:
or just follow the Help files. They say the same thing. use TAB after each entry to invoke the auto calculate feature.
1. Mms, Cms
2. Sd, BL, Re (ensuring that you know whether it is specified in series or parallel for dual voice coil drivers)
5. # voicecoils (default is parallel)
but if Re, BL is specified in serial, then select serial and correct Re, BL that the auto feature messes up. If you have the series values for Re and BL and want to calculate the parallel values - initially perform the following to calculate them and then clear all entries and start at point #1.....
I'll just reprint what the help file says:
If there are several voicecoils, then you must be careful when entering parameters in that case, because many manufacturers give Bl in voice coils in series, because it yields double value for Bl against parallel connection. If driver manufacturer gives Qes, Bl and Cms or Mms, then you can check how Bl is specified. For that, you can enter following parameters to calculate Re: Qes, Fs, Mms or Cms and Bl. Connection mode can be changed by changing the combobox selection. The driver editor then converts Bl and Re values accordingly.
Equivalently, you can check for Bl by entering:
Qes, Fs, Mms or Cms and Re (for desired connection mode).
If you enter resistance for parallel connection and get about half of advertised Bl, then you know, that Bl was specified that way.
So, for example with the SoundSPlinter RL-P18-D4 where they specify Re=6.26 and BL=24.25, this would be two coils in series. You know this because two times 4 ohm is 8 ohms and so the 6.26 ohms is the pure resistive coils in series. If you want to calculate the parallel equivalent use the method I outlined above to first establish that and then clear and start at point #1.... (the answer for parallel would be Re=1.565ohms and BL=11.93070