Wow look at those y-axis labels! About a +21dB bass boost! Have you listened to it? Even that Mach10 bass seemed like it would muddy other frequency bands. But over 20dB of bass boost, can you even hear any other content?
I have.
If you look at the graph, there is pretty much no emphasis in the upper root range, so vocals aren't muddied or overshadowed by toooo much. However it is a really really strong emphasis (with 1 kHz as reference, it is even ~ 28 dB if you look closely, which is almost four times as loud) and yeah, when the lower bass kicks in, it takes all of the presence and is fatiguing because of the amount. But it's remarkable that even when the EQ, Mach3Bass and BBE are maxed out, there are no distortions (well, there are just very little when all three are maxed out but none (that I could spot during my testing of the massive bass boost) when two are maxed out but the third is "only" at ~ 90%) and the bass remains clean and controlled.