Stereo Integrity (SI) is a boutique American audio brand stocked by Apex Automotive Customs. In a world of mass-produced speakers, SI stands out as an engineering-first company that prioritizes Linear Excursion (Xmax) and low distortion. They are the pioneers of the “SQL” (Sound Quality Loud) movement—delivering audiophile precision at volume levels that would make standard “SQ” speakers crumble. Contact US For More Info,