Audiophiles will love the aural power of Equalizer. This tablet-optimized tool gives you total control over your device's audio playback, with a five-band equalizer setup. You can fine-tune the levels yourself, or select from a variety of EQ presets such as classical, jazz, and pop. Equalizer includes effects for bass-boosting, virtualization, and reverb. It works with the stock Android music player and a large number of third-party programs, including DoubleTwist, Pandora, PowerAMP, and Spotify. Equalizer is free, though a $2 unlock key is required for some of the more advanced features. It can help improve audio quality, but it won't work miracles if your tablet's speakers are inadequate to begin with.