The best replacement for equalizer is crossover.

The best alternatives to equalizer are rated as following:
★★★★★  crossover
★★★★  reese dual cam
★★★  dual cam
★★★  hensley
★★  escape plan
★★  sound processor
★★  equaliser
★★  parametric equalizer
★★  blue ox
★★  reese
★★  dip station
★★  epicenter
★  fastway
★  e2
★  equ
★  graphic equalizer
★  amplifier
★  ultimate body press
  husky hitch
  dip bar
  e2 hitch
  pftrack
  preamp
  directory generator
  entertainment system equalizer
  analog equalizer
  hensley arrow

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

Other search terms related to equalizer and their ratings are:
★★★★★ pandora
★ volume control
★ amplifier
You have in mind a companion for equalizer and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of equalizer in all years. Click on graph for more.
equalizer
crossover
reese dual cam