Simon.

Some 'low cut' is essential in most mastering cases, even with bass-heavy music like drum & bass. However removing frequencies around the range of 60Hz, for instance from drum & bass, will alter the character of the sound even if those tones are inaudible to the human ear. In audio, it's not just the tone that you're focusing on that's affecting you. It's also the undertones: the harmonics in the resonance. And don't forget non-auditory perception. (For instance, when you feel, rather than hear the sub-bass.) So with drum & bass, breaks, electro etc, the trick is to lose as little bass as possible together with all the usual mastering tasks like clarification, compression, EQ etc. Some mastering engineers go by the book and cut. Others learn a way round the problem of 'too much bass'. Time to big up the British mastering engineers like 'Simon@The Exchange' who helped to make jungle, drum & bass and other UK-originated styles of music, what they are.