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Articles & Videos: Sound Processors for Factory Radios

Factory sound processors take your factory stereo's music signal, clean it up, and send a corrected audio signal to your aftermarket amps and subwoofers.

Video: Upgrading Your Factory Stereo, part 2
by Robert Ferency-Viars, Ken Nail

In this short video, Crutchfield experts show how a fellow employee created a high-performance car audio system without replacing his vehicle's factory stereo.

Upgrade your car's sound
by Buck Pomerantz

Factory stereo systems leave a lot to be desired. The four upgrade systems we discuss in this article improve the factory sound of different vehicles in different ways.

A Rockford Fosgate system gave the family minivan a major audio overhaul while still keeping the manufacturer's dual DVD players intact for the kids.

Adding a sub to your factory stereo is a great way to improve your sound without giving up your familiar factory controls. Follow along with our expert in this video.

A line output converter lets you connect an amplifier to a factory stereo. In this article, we answer the most common questions about line output converters.

With the right audio tools, your music can sound crisp and clear in the car. This article explains what to look for so you can sculpt the best sound in your ride.

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