The EEM is an Electronic Enclosure Module. When using a ZR/XS Kicker amp with Freeair subs this module makes it sound as if you had a box. I used to have 4 12" freeair subs in my trunk with no box. When i put in this module the bass was amazing. Some guys with regular subs in a box also use this module because it really boosts your bass. If you have a Kicker amp and could use this make me an offer.
