Hello and welcome to my daily headaches! I'll start this build log off with my past setup, my current, and finally update throughout December as I work on probably the furthest this little Civic will let me go. My instagram: https://www.instagram.com/joshdashef1/   The Past Build: Head unit: Pioneer 80 PRS  Mono Amp: Rockford Fosgate Prime 750.1 Subwoofers: Rockford Fosgate P3D4 12" (two) Kicker 4 gauge amp kit OFC Stock Electrical (alternator included) Did do the big three sometime between here and current build Prefab Box: Q-Power Box (Dual 12s) Tips: Tesa taping RCA's, Marking RCA's Low/Mid/High or similar,  Big Three with loom. Wire was Sky High 1/0 OFC with some 1/2" loom I believe. Old military style terminals (DO NOT USE THESE) they cracked my battery eventually.