Most big drivers are "conservatively rated" i wouldn't be to caught up on the number
I've never seen a lvl 4 with quad spiders. it would be so inefficient that it would be a horrible driver.
standard the lvl 4 has 2, XL has 3, and 5 had 4 spiders as well as lvl 5 coils in 5s and XLs and an option to get it in a lvl 4.
and to the OP i've watched (in person not on youtube) an XL 10" take ~2,000wrms In a Tline //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
-Drew