What Class Would I Run?

Enter your woofer size and count and your sub amp count, and see which dB Drag Racing Street division — A, B or C — you would land in under the org's own published rules. Street only: not MECA's Pressure Class, not Modified or Radical.

This is an ORIENTATION tool, not an official scoring or classification tool. Every class gets verified for real at the scale and the lane by a certified tech inspector at an actual event — that inspection is the only result that counts. Don't assume this tool's output survives contact with that inspector; bring your own paperwork, spec sheets, and a tape measure.

dB Drag Street Class Calculator (A/B/C)

Sizes above are pulled from this site's actual driver database — not a hardcoded guess at what's out there.
Count physical amplifiers, not channels. If you're running externally bridged monoblocks, still count each physical amp — the calculator checks the "or N bridged monoblocks" allowance for you and flags it when it applies.

Source: dBDRA's Street division rules, which termpro.com hosts. We could not read that page directly, so the class limits below were cross-checked across three independent searches on 2026-08-23. Rules change by season: confirm against the current rulebook before you compete. Covers Street A, B, and C only — Modified and Radical are out of scope.

Result

Pick a woofer size, enter your counts, and hit Check My Class.

MECA Pressure Class — not computed here, on purpose

MECA classes by clamped amplifier power and woofer cone area — a different system from dB Drag's Street divisions above, and this tool does not compute it.

Honest gap: two different secondary sources found this session gave two DIFFERENT formulas for MECA's pressure class number — one using cone area (in²) plus measured wattage, the other using fuse amperage × 10 plus cone area. The primary-source MECA rulebook PDFs would not extract cleanly enough to confirm which is current. This site sells itself on verified, sourced math, so it does not guess here — it links out instead.

Open MECA's official SPL Class Calculator ↗

Find a local competition

Once you know roughly what class you'd run, the next step is finding an event near you.

Find bass/SPL events on Sparked Builds ↗