2005 audi a4 hu: kenwood kdc-bp945u amp: rf t1000-1bd sub: ssa icon 12d1 in 1.35^3 sealed box wiring: streetwires 0 gauge speakers: stock plans: upgrade door speakers, 4 channel amp for doors, repair my blown icon and get a ported box built for both of them, secondskin the trunk 1998 vw gti hu: alpine cda-9886 amp: rf 301m sub: ssa dcon 12d4 in 1.75^3 ported tuned a @ 38hz (mtx bassslammer specs) wiring: generic 8 gauge speakers: stock plans: upgrade front stage, 2 channel amp, spec ported box, secondskin the whole thing