"I did not expect this"

What enclosure size and tuning frequency are you using?
5.6 cubic feet and two 4.125" ID ports x 8.25" ducts for an Fb of ~ 32 Hz right?

What is the DCR of that stock LF inductor or do you have a stock one?

"Would there be any sense to try a ME150HS instead of 2235H?"

If you have them then try them