Single PA top rather than amp?

[Bill Fitzmaurice]

The values each of the rheostats would have at any given level of attenuation are the same as those for a fixed LPad, which you calculate with this: https://sengpielaudio.com/calculator-Lpad.htm

[warwickhunt]

Anecdotal but I transitioned between full bass rig to IEM (no backline) via using my chosen preamp pedal (Fishman Platinum Pro) into a QSC 10 mounted on a speaker stand to my side of the stage (obviously PA doing all the heavy lifting).  The sounded that I had to work with was far better than I expected and I occasionally default back to this set up when I've doubts about the quality of the engineer/PA to supply a good IEM mix... I've not reverted back to full backline, which surprises me (40+ years of relying on backline, often to carry FOH).