... ... ... So...I'm curious if anyone knows a direct link to the frequency range of each of the Rumble tone controls. I'm curious why I can dial back the lows so far and still have such a full sound. ... ... EDIT: Found this online...
According to Fender's specifications, the Fender Rumble 100 tone controls generally affect the following frequencies:
Bass around 80Hz, Low-Mid around 280Hz, High-Mid around 1.2kHz, and Treble around 10kHz; with the "Contour" function also manipulating midrange frequencies by cutting around 670Hz while boosting slightly at lower and higher frequencies.
... ... ...
You found the EQ frequency centers, not the ranges.
Check the club wikis. I’m pretty sure there are some useful graphs.
Righty-O, Miley-O! The the Fender Rumble 500 (&40) Frequencies wiki, to be exact.
It has the Fender Rumble Published Frequency Spec.s taken from the manual, for one. (Click the small graphic to make it legible.)
Of course, it's got the "Flat" (all 12 o'clock) tone curve compared to the Actual Flat (10-2-2-10) curve for the Rumble 500. And it's got a few different setting curves for the Rumble 40.
And the direct link to frequency ranges for each EQ tone control is the Rumble 500 Minimum & Maximum Tone Controls graphs. (Again, click the graphic to read it better.) It shows the centers you mentioned PLUS the range curves, AND the tone descriptions used in the graphic & video in the wiki FOREWORD!
And, finally, there's curves for the 3 voicing buttons and the Overdrive!
Enjoy, Mittle!