The best replacement for soundbar is 5.1.

The best alternatives to soundbar are rated as following:
★★★★★  5.1
★★★★  surround sound
★★★  speakers
★★★  2.1
★★★  surround
★★  3.1
★  surround system
★  bookshelf
★  computer speakers
★  soundbase
★  speaker system
★  htib
★  2.1 system
★  bose
★  surround sound system
★  center speaker
★  pc speakers
★  home theatre
★  center channel
  av receiver
  bose cinemate
  stereo system
  5.1 speakers
  bose 2.1
  5.1 system
  tv speakers
  home theater system
  stereo speakers
  ceiling speakers
  2.0
  bose 321
  theater system

Your alternative for soundbar is not listed? Suggest!
Speaking about soundbar, one probably shouldn't forget about wireless subwoofer.

Other search terms related to soundbar and their ratings are:
★★★★★ wireless subwoofer
★★★ receiver
★ wireless sub woofer
blue ray
You have in mind a companion for soundbar and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of soundbar in all years. Click on graph for more.
soundbar
5.1
surround sound