Sub Not Hitting? We Fix It. Free.
Amp in protect mode? Wiring nightmare? Distorted bass? Building a box from scratch? We built the tools and guides we wish existed before we blew our own gear. 14 free tools. Zero BS.
🔧 The Car Audio First Aid Kit • 2026
Choose Your Problem
I’m Building a System
Need help choosing the right sub, amp, box, and brand without wasting money.
My Sub Isn’t Working
No bass? Weak bass? Distorted output? Start troubleshooting before you buy anything new.
I’m Wiring My Subs
Need the right final ohm load so the amp stays happy and the bass hits the way it should.
I’m Building a Box
Need box size, port length, and a build plan to create an enclosure that actually works.
Your Free Tool Stack
Use the tools first. They’ll save you money, time, and blown gear.
Blown Sub Checker
Smell test, cone test, scratching test, and multimeter basics — figure out if the sub is actually dead.
Wiring Wizard
DVC 2Ω? DVC 4Ω? Two subs? Final load confusion? This is the fastest way to avoid protect mode.
Amp Match Tool
Match real RMS power and final impedance so your amp and sub actually work together.
Guides That Actually Help
Best Budget Subwoofer Amps
Cut through fake wattage and find budget amps that actually make real power.
How to Build a Subwoofer Box
DIY box building, MDF, bracing, sealing, and why airspace matters more than guesswork.
Sealed vs Ported
Which enclosure actually fits your bass goals? Loudness, accuracy, and space all matter.
How to Set Gain
Stop clipping your amp and melting your sub. Gain is not a volume knob.
DVC Wiring Guide
Series, parallel, and final impedance explained without the forum nonsense.
Multimeter Basics
Learn the quick tests that can save you from replacing perfectly good gear.
Amp in Protect Mode?
Match your amp light to the likely problem before you start unplugging everything.
Solid Red
Short circuit
Solid Orange
Overheating
Blinking
Impedance too low
Green, No Sound
Signal problem
Explore by Topic
Brands That Don’t Lie About Power
We’ve blown enough cheap gear to know who actually puts real RMS ratings on their amps. These are the brands we trust first when someone asks what to buy.
Still Having Issues?
We’ve got free tools, deep guides, and enough hard-earned mistakes to save you from repeating ours.
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