Audio Control is excellent,this LC8i made my system work realy well. I have a 2007 toyota camry with the JBL system.It is an 8 speaker system and the LC8i worked perfectly.It has up to 9volt gain so you can keep your gains way down for less distortion. Summing the signals can be confusing but the staff at audio control will be happy to help if have any questions. All audio control proucts are made in Washington state.I have puchased a lot of their products over the years and I have had good luck with all the products i have purchased. My system sound so clean.