Car audio, explained.
Plain-English guides from HF Audio's build bench. Every article is one click from this page — no menus to dig through.
- Choose8 min read
How to Choose Your First Car Subwoofer
Cone size, voice coil, sealed vs ported, and matching power — the four decisions that decide how your first sub sounds.
Subwoofers·Amplifiers - Install10 min read
Sound Treatment Essentials: Building the Foundation of a Great Audio System
Great sound starts with engineering, not equipment. Understanding what each material does — and why — matters far more than coverage percentages.
Accessories·Speakers - Build10 min read
Sealed vs Ported Subwoofer Enclosures: Which One You Actually Want
Sealed is small, tight, and SQ-friendly. Ported is louder and lower but bigger. Here's how to pick — and what each one costs you.
Subwoofers - Tune9 min read
How to Set Amplifier Gains the Right Way
Forget setting gain by ear. The DMM + test-tone method takes 15 minutes and protects your speakers from the clipping that kills them.
Amplifiers·DSP - Wire11 min read
Wiring a Car Amplifier: Power, Ground, Remote, Signal
The four wires every amp needs, the gauge you should run, and the fuse placement that keeps your car from catching fire.
Amplifiers·Accessories - Choose7 min read
Component vs Coaxial Car Speakers: Which One to Buy
Coaxials are a bolt-in upgrade. Components image better but cost more and need install work. Here's the honest tradeoff.
Speakers - Tune12 min read
DSP Tuning Basics: Time Alignment, Crossovers, EQ
A DSP only sounds magic when you set it up right. Start with time alignment, then crossovers, then EQ — in that order.
DSP·Speakers - Install10 min read
Installing a Front Stage: Door Speakers and Pillar Tweeters
A proper front stage starts with the install. Adapter rings, foam baffles, pillar pods — the parts that make components actually sound like components.
Speakers·Accessories