How-To
How Do You Measure Car Speakers? Size, Depth and Fit Explained
Speaker sizes are nominal, so the frame, screw pattern and mounting depth decide what fits. Here is how to measure each one without guesswork.
The archive
Car audio reviews and buying guides
Everything we have published, newest first. Every product below was bought at retail, measured on the bench and installed in a car before a single word was written about it.
Amplifiers
How to Choose an Amplifier for Car Speakers: Channels, Power and Fit
Channels, RMS power, impedance and head unit compatibility decide which amplifier suits your speakers. Here is how to check each one in order.
How-To
How to Upgrade a Car Audio System: A Step-by-Step Plan
Speakers, head unit, amplifier, subwoofer, deadening and DSP: the order to upgrade in, and what each step changes about the sound.
Head Units
How to Upgrade a Car Stereo: Parts, Wiring and Installation Steps
Choosing a receiver, the installation parts you need and each step of replacing a factory car stereo, plus upgrade options when the radio cannot be replaced.
Troubleshooting
How to Fix a Blown Car Amplifier: Diagnose It Before You Replace It
Most amplifiers written off as blown are behind a failed fuse, a bad ground or a shorted speaker wire. Here is how to find out, and what to do if it really is dead.
Troubleshooting
How to Fix Blown Car Speakers: Test, Repair or Replace
Distortion, rattles and missing bass do not always mean a blown speaker. Here is how to test each one and decide whether to repair or replace it.