Stinger adds to their RoadKill line by launching a new sound deadening sku, RKSP2. Eliminate increased distortion and decreased bass response caused by standing waves with one quick step–install Stinger RoadKill Speaker Standing Wave Rings. Stinger RoadKill Speaker Standing Wave Rings absorb and deflect rear energy from the back of the speaker, keeping the energy from returning and interfering with the front wave output. The easy peel and stick adhesive allows for fast, clean installation when adding these rings to speaker installs, while the eggcrate acoustic foam decreases distortion and increases bass response.


  • Eggcrate acoustic foam improves bass response and increases amplifier output as well as absorbs annoying squeaks, rattles and vibrations creating excellent sound reproduction 
  • Rear energy from the back of the speaker will be absorbed and deflected without returning and interfering with the front wave output. Your install will have decreased distortion, and no out-of-phase reflections that rob sound systems of bass response.
  • Kills car rattles, vibrations, and noise creating a superior listening experience 
  • Peel and stick self-adhesive for easy installation
  • Waterproof 
  • 2-Pack: 130mm rings