My Head Unit Has More Than One Set Of RCA Preouts, What For?
(A). With Multiple Sets Of RCA Preouts, You Have More Options For What You Want To Connect To Your System. For Example, If You Have Two Sets Of Preouts, You Can Run A 2-Channel Amp For Your Subs, And Also A 4-Channel For Your Door Speakers. If You Want To Run Multiple Amps But Only Have One Set Of RCA Preouts, Ya Need To Buy RCA Y’s(can be bought bout anywhere.