With a built-in 12dB/octave high-, low-, or all-pass electronic crossover variable, the Kicker ZX 450.2 is a good option for anyone wanting a stereo system with a reasonable enough price but not lacking in power. The KICKEQ Boost that comes with Kicker stereo systems offers 18 decibels of bass centered at 40 hertz. The Kicker ZX stereo series also comes with some automatic turn-on modes such as DC Offset which detects surge from hi-level speaker outputs, a remote bass control for easy access, and a variety of other features that make the upper end of the product line stand out.