Review on Enhance Your Audio System with Planet Audio EC10B 2-Way Electronic Crossover and Subwoofer Control by Leonard Beard

In 30 years of installing a car audio system I have never used a better subwoofer processor. It offers incredible customizability: adjustable third-order low-pass crossover, adjustable bass boost frequency, adjustable bass boost level, remote level control, phase switch, and mono/stereo switch. You'll be able to get the best bass your car, woofers and speaker can offer. Very satisfied. The sound quality is very good, there is no noise. I don't use a tweeter or midrange crossover.