I agree with Tom, mid-bass isn't completely masking away the sub-bass. But stock sound is definitely mid-bassy. My own preferences lean rather towards less mid-bass and equal amounts (or even slightly more) sub-bass though. And that's the beauty of the tape mod, since it seems to attenuate mid-bass more than sub-bass. The hole in the tape needs to be very tiny though, to achieve that kind of sound signature.