Do not attempt to install the original SRS Audio Sandbox on any Android device released after 2016. Instead, use Wavelet (no root) or Viper4Android (root) to get the same or better 3D bass and surround effects.
SRS Audio Sandbox used psychoacoustic processing: srs audio sandbox for android
From the makers of the famous Poweramp music player, this system-wide equalizer is a powerhouse. Do not attempt to install the original SRS
An open-source alternative to Viper that uses complex digital signal processing to simulate different acoustic environments. Why People Still Search for SRS srs audio sandbox for android