Yeah. I have to admit my listening environment is relatively bad too. Though I've tried to sort of treat it, I still have this big resonance on 117 Hz.
Problem with this is the measurement. Without proper flat speaker and proper flat measuring microphone you rely solely on your ears.
A little trick I came up with though: Take a synth, make a patch that plays just a sine (may be also a bit of first harmonics so it's easily judgable) and make sure you have no volume modulation/envelope on. Make sure on your DAW meter that all the notes go up to the exactly same volume. Then play it note by note from bottom to the top and if any note sticks out as too loud, you've found a serious resonance you should try to get rid of or at least be aware of it. You can repeat this on another set of speakers to make sure it's a room problem.
...not a proper way of measuring at all, but beter than nothing.
