Subcategories:

Bass Expanders & Reconstruction Processors (10 products) The original bass reconstructor, or bass enhancer, is the AudioControl Epicenter; however, over the last few years many other manufacturers have released similar products that enhance lower frequencies in a car audio system with at least one subwoofer.   Crossovers (35 products) Crossovers divide your music into high, low and midrange frequency ranges.   Equalizers (46 products) Tune your system to perfection with an equalizer   Factory Sound Processors (14 products) Most original factory stereos use preset equalization curves that are based off original (OEM) factory speakers. Processors in this category reshape the output of such equalization curves and give you the best possible sound when you upgrade to aftermarket amplifiers and speakers.   Other Sound Processors (20 products) Line drivers and other processors