FREE Shipping On ALL Orders Over $50!

Free Shipping On Orders Over $50

Frequently Asked Questions: The 12 Volt Encyclopedia

Browse by Category

🔊 Car Stereos & Head Units

  • Single DIN vs Double DIN — what fits your vehicle?
  • How to enable Apple CarPlay and Android Auto
  • How to set up Bluetooth on your head unit
  • Understanding head unit power output: RMS vs peak watts
  • How to retain steering wheel controls with an aftermarket stereo
  • Best head units for factory-amplified systems

🔉 Car Amplifiers

  • How to set amplifier gain correctly (with and without a multimeter)
  • Class A/B vs Class D amplifiers — which is right for you?
  • How to bridge an amplifier
  • Mono vs 2-channel vs 4-channel — what do you need?
  • Understanding impedance: 1 ohm, 2 ohm, 4 ohm — what does it mean?
  • How to wire multiple amplifiers cleanly

💥 Subwoofers & Bass

  • Sealed vs ported enclosures — which sounds better for your music?
  • RMS power vs peak power — what actually matters
  • How to match a subwoofer to an amplifier
  • Single voice coil vs dual voice coil subwoofers
  • How to calculate the right enclosure volume for your subwoofer
  • Competition SPL vs daily driver subwoofers — understanding the difference

🔈 Car Speakers

  • Component speakers vs coaxial speakers — which is right for you?
  • Understanding speaker sensitivity and why it matters
  • How to choose speakers for a factory radio
  • How to install door speakers without cutting
  • Tweeter placement for the best soundstage
  • How to size replacement speakers for your vehicle

⚡ Wiring & Electrical

  • How to choose the right wire gauge for your amplifier
  • What is the Big 3 upgrade and why do you need it?
  • How to properly fuse your car audio system
  • Understanding voltage drop and how to prevent it
  • How to run power wire from the battery to the trunk
  • Distribution blocks — how to split power to multiple amplifiers

🔋 Batteries & Power

  • AGM vs lithium batteries — what's the difference?
  • Do I need a secondary battery for my car audio system?
  • How to add a secondary battery in the trunk
  • What is a sodium ion battery?
  • How to maintain and charge your car audio battery
  • XS Power vs Limitless Lithium — which is right for your build?

🎛️ Signal Processors & Factory Integration

  • What is a line output converter (LOC) and do you need one?
  • Active vs passive line output converters — what's the difference?
  • What is a DSP and why should you use one?
  • How to integrate an aftermarket amplifier into a factory system
  • How to fix bass loss in factory DSP systems
  • AudioControl vs PAC — choosing the right integration solution

🔐 Remote Start & Car Security

  • How does a remote start system work?
  • Do I need a bypass module for remote start?
  • One-way vs two-way remote start — what's the difference?
  • How to extend the range of your remote start system
  • How to set up smartphone control for your remote start
  • Car alarm sensors explained — shock, proximity, glass break, and more

📦 Speaker Boxes & Subwoofer Enclosures

  • Sealed vs ported vs bandpass enclosures — which hits hardest?
  • How to calculate internal enclosure volume
  • What is enclosure tuning frequency and how does it affect sound?
  • MDF vs other materials — why box construction matters
  • Pre-fab vs custom enclosures — pros and cons
  • How to find the right box for your subwoofer's specs

📷 Car Video, Cameras & GPS

  • How to install a backup camera
  • Front vs rear vs 360-degree camera systems — which do you need?
  • How to hardwire a dash cam to your vehicle
  • Single-channel vs dual-channel dash cams — what's the difference?
  • How to set up a GPS navigation unit
  • Headrest screen installation guide

Can't find what you're looking for? Contact our team — we're real car audio people and we're happy to help.