The best replacement for subs is dubs.

The best alternatives to subs are rated as following:
★★★★★  dubs
★★  hoagies
★★  12 subs
★  speakers
★  dubs anime
★  15 subs
★  1 sub
★  12 inch subs
★  subway
★  6x9
★  jimmy johns
  kicker subs
  1 12 sub
  down firing subs
  1 15 inch sub
  2 12 subs
  1 10 inch sub
  wraps
  1 12 inch sub
  ported subs
  1 15
  1 12 inch
  2 15 inch subs
  russian subs
  10 subs
  svs
  15in subs
  round subs
  sandwiches
  more watts
  1 10 sub
  2 10 subs
  4 8 subs
  kicker
  2 15 subs
  15 inch subs

Your alternative for subs is not listed? Suggest!
Speaking about subs, one probably shouldn't forget about amp.

Other search terms related to subs and their ratings are:
★★★★★ amp
★★ box and amp
★★ stock radio
★★ factory radio
★★ built in amp
★★ amplifier
★ best bass
★ led lights
★ stock head unit
★ amps
★ stock deck
an amp
enclosures
no amp
stock stereo
mono amp
You have in mind a companion for subs and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of subs in all years. Click on graph for more.
subs
dubs
hoagies