You have a way of not reading what was already written. Don't know if it's lack of respect for other posters or just ignorance. Anyway, you are really starting to get on my nerves by insinuating foul play on my side. I told you that I understand your opinion regarding hot swapping fans, but professional experience and practical experience are on my side. Not gonna continue on this subject further.
Back on topic.
First and foremost, I've told you that I MEASURED the current draw of six Vardars ER on SPINUP. Measuring for me means breaking out the calibrated Fluke and logging the readings. What I found was the 6 Vardars pull 3.1-3.5A for around 1 second.
Second, your math is based on max power draw while they are already spinning. A motor tends to multiply the nominal current while starting up.
Lastly, as the title of this topic says, I am talking about startup problems of the fans.
What really gets me about your post is that you seem confident about what you are saying without even reading what others have said. To give you an example:
No way your D5 is throwing enough current through the 4th channel to overload the spectrum. My D5 isn't handy atm, but I believe that it uses ~10w as an educated rough estimate.
The D5 G2, at least, has a nominal power draw of 23W. Please observe the term NOMINAL. While a pump starts up it can draw 2-7x the nominal current. AAAnnnnnnddddd, I told you that my pump is not drawing power from the AQ only PWM signal. Pumps now don't even come with fan connectors for power.
Oh, not to forget, I have an AQ6 Pro.