So here we go again. car: BMW E39 - 1998 year Engine 2,5 liter diesel Transmission - automatic Audio: HU: Older Blaupunkt, with 2 pairs of RCA in and outputs. Sub: JL Audio 13W7 tuned to 32Hz Other speakers: Hertz mids and highs, front and back Sub amp: alpine 500w monoblock, about 400w rms running into sub. Other mods: Angel eye rings LED interior lightning Plans & goals seperate amp for mids and highs new amp for woofer, maybe kicker KX2500.1 or Spl Dynamics ice-3500D new HU, something from Alpime with orange lightning maybe recoil sub in future new trunk layout lower car LED bulbs in fog lihts Tint tail and headlights Pictures: polished headlights