Contrary to what their name implies, bass traps actually increases the clarity and focus of low end content in a space, giving you the thump and oomph that might have been cancelled out by standing waves. Most rooms have their fundamental resonances in the 20 Hz to 200 Hz region, each frequency being related to one or more of the room's dimensions or a divisor thereof. These resonances affect the low-frequency low-mid-frequency response of a sound system in the room and are one of the biggest obstacles to accurate sound reproduction.