Just been looking at the Mooer Radar cab sim pedal and it has built in and, according to the manual, adjustable HP and LP filters, as well as EQ, power amp and cab sims. No details as to what the available settings are for the filters or what slope the filters have though...
Very interesting little pedal nonetheless!
Edit:from a user on that other site, HPF is adjustable from 15Hz in 5Hz steps. 5 band eq has sweepable mid points.