Get in Touch with CarsFM

CarsFM is an independent, advertising-supported car-audio site, and there’s one inbox behind it. Email is the way to reach it: admin@carsfm.com.

Worth an Email

• A result that looks off — tell us which calculator (the box, amp power, impedance, wire gauge, SPL, or crossover tool) and the numbers you entered, so we can reproduce it.
• A correction to a guide, a blog post, or a museum entry.
• An idea for a tool or a feature that would have helped your last build.

We read everything that comes in, but this is a small operation, so replies aren’t instant and we can’t promise a fixed turnaround. One thing worth keeping in mind: every calculator here returns an estimate built from published formulas and specs — not professional installation or electrical advice. For anything touching fusing, grounding, or an amplifier’s safe minimum impedance, have a qualified installer confirm it before you rely on the number.