Find a real bass competition near you and know what you're walking into before you get there. Every sanctioning body and link below was checked live — no guessing, no dead links, no made-up Facebook groups.
Click your part of the country. This isn't a live-scraped events calendar — nobody publishes one of those in a structured way this site could pull from responsibly — it's a map-shaped shortcut to the same four sanctioning bodies and the Sparked Builds aggregator, pre-filtered by which ones actually cover your area.
Four organizations run the vast majority of sanctioned SPL and sound-quality events in the US. Each one publishes its own rulebook, class structure, and event calendar.
| Org | Runs | Link |
|---|---|---|
| dB Drag Racing (dBDRA) | SPL "burp" competition — the original format, scored by peak dB | termpro.com |
| MECA (Mobile Electronics Competition Association) | 100–150+ events/season across SPL and Sound Quality (SQL) | mecacaraudio.com |
| IASCA (International Auto Sound Challenge Association) | SPL and sound-quality classes, long-running international org |
iasca.com
a second related domain, iascaworldwide.com, also exists — worth checking both for your region |
| USACi | SPL, MUSIC, DEMO, and SQ classes | usaciworldwide.org |
A community aggregator site pulls event listings and results from all four orgs above into one searchable calendar — start here before digging through each org's individual site.
Lists events by state and date, and aggregates results from dBDRA, MECA, IASCA, and USACi in one place.
sparkedbuilds.comWalking in cold, here's the honest rundown of what actually happens and how it's scored.
Burps are the classic dB Drag format: a single sine tone played for about 3 seconds, scored on the single highest dB peak the meter catches. Short, loud, over fast.
Musical / Bass Race formats run Price-is-Right rules instead — you pick a cap class (steps from 119.9 up through 159.9 dB) and your score is how close you get to that cap without going over. Go over the cap and you're disqualified for that run, so this format rewards precision and knowing your system's real output, not just raw power.
The Term-LAB Magnum is the standard certified meter used across all four orgs above. It's mounted two ways at once: a clamp-on sensor around the amplifier's power leads, plus a sound level meter mounted on the windshield. Both readings matter — judges aren't just pointing a phone app at your trunk.
Competition boxes are typically tuned high — 45 Hz and up — and deliberately matched to that specific vehicle's own cabin resonance. Competitors sweep test tones through their car to find the exact frequency where their cabin itself gets loudest, then tune the box to ride that peak. It's a car-specific, format-specific tool.