No, I have not purchased those coaxs yet.

There is dearth of drivers here in India. Importing them is not viable for a DIYer.
So I had to choose the drivers first and check out whether they were usable in a line array.
I knew the Qts was too high for a sealed enclosure use.
Of late I have seen good quality 4" drivers (dashboard use) and came up with this idea of LT eq.
When I read that ids25 are equalised too, I thought it was possible too use car coaxs in a line array by LT.