Keep in mind that our job as mixers is essentially the same as that of a magician: to create a satisfying illusion in the mind of the audience. So while left and right is all we have in stereo, mono bass summing focuses the center image while creating the illusion of greater space in the stereo field, which in turn simplifies the mixing process. Mongoose makes it easy to achieve a focused and punchy center image with as much width on the sides as you like. Mongoose fixes this problem by summing low frequencies to mono so that no matter how far you pan your instruments, they will sound equally natural on both headphones and speakers.