Today's modern vehicle audio systems are becoming increasingly more Sophisticated and complex. PAC engineered amppro to dramatically simplify the installation of upgraded aftermarket amplifiers in data-bus controlled amplified sound systems. The amppro 4 amp interface for select 2010 through 2013 Toyota and Lexus vehicles with JBL amplified sound systems allows you to keep the original radio's fit, finish and features while giving you the freedom to improve the audio performance in record time