Simple and effective
One twist of the bass knob, and you'll hear the bottom returning to your music. The Epicenter InDash does a great job of pumping up your digital music files or live recordings, restoring low bass that's been lost to compression or poor recording. Separate parametric, Para-BASS controls let you fine tune bass response and allow you to choose the center frequency for the bass maximization circuitry.
SPL meter for competitors
You'll also get an SPL display that uses a built-in microphone to measure the sound pressure level of your system all the way up to 160 dB. A "Peak Hold" setting allows you to show off your system's maximum bump. The display also monitors your battery voltage, a nice feature if you've been playing music with the engine turned off. A warning light lets you know when interior sound levels exceed 120 dB so you can use ear protection. And you can switch the backlight illumination to either red or blue, to go with your car or mood.
Note: This AudioControl sound processor needs to be wired in line between your receiver and amplifier. Although it can be in line after an equalizer, it must be installed before any crossover.