[edit] Sound reinforcement systems
Haas' findings can be applied to sound reinforcement systems and public address systems. The signal for loudspeakers placed at distant locations from a stage may be delayed electronically by an amount equal to the time sound takes to travel through the air from the stage to the distant location, plus about 10 to 20 milliseconds. The first arrival of sound from the source on stage determines perceived localization whereas the slightly later sound from delayed loudspeakers simply increases the perceived sound level without negatively affecting localization.
[edit] Haas kicker
Many older LEDE ("live end, dead end") control room designs featured so-called "Haas kickers" - reflective panels placed at the rear to create specular reflections which were thought to provide a wider stereo listening area or raise intelligibility.[3] However, what is beneficial for one type of sound is detrimental to others, so Haas kickers just like compression ceilings are no longer commonly found in control rooms.[4]
Here is the full wiki page:
http://en.wikipedia.org/wiki/Haas_effect
But heres the gold a free fx plugin which creates this effect with out all the bs: http://www.vescofx.com/vfxFreeHaas
This is not good for your kick so dont do it!
Or anything below 200hz, it is spectactular for vocals and formant bass and try to use your ears for they are the best tools
Enjoy,
Autonation