Every EMMA judge has stood at a car door while a competitor's hands start shaking because something just stopped working mid-run. A channel drops out, a tuning tablet locks its screen, or the system suddenly reads wrong on the meter. The good news: EMMA's rulebook actually plans for this. The bad news: most competitors have never read that part of it, so they panic instead of just using the time they're entitled to.
The 5-minute repair window
If a judge notices your channels are wired or phased in reverse during judging, the rule is specific: the judge tells you, and you get five minutes to correct it yourself before the run continues. Nobody fixes it for you — it's your car, your wiring, your five minutes. If you can't track it down in time, you're not disqualified. You simply get asked to decide whether you want the system judged as it currently sits, reversed channels and all, or not. That's your call, not the judge's.
The screen-lock trap
This is the one that catches people out most. If you're running tuning or source control off a phone or tablet and the screen times out and locks mid-judging, in a normal qualifying round that's treated as part of the same five-minute repair allowance — annoying, but not fatal. At national finals and the Euro final, there's no such grace: a screen lock during judging costs you three points straight off your listening pleasure score. No warning, no repair time, just a deduction. If your build relies on a tablet for anything, turn off auto-lock and sleep timers before you ever pull into the judging bay — it costs nothing and it's one less way to lose points you actually earned with your tuning.
A reversed channel or a locked screen isn't a build problem. It's a five-minute problem you created by not checking it before you got in line.
What the rule doesn't spell out
I'll be straight about the limits here: the rulebook doesn't state how many times you can call on repair time in one run, and it doesn't define exactly what counts as a legitimate "fix" versus you effectively re-tuning the car on the clock. In practice, judges use common sense — swapping a reversed RCA back the right way round is obviously fine, pulling out a laptop to rebuild your whole crossover curve isn't what the five minutes is for. If your system also needs a tonal-accuracy retest after a high-volume check, that's a related but separate process I've covered in detail on why EMMA retests your system at +6dB — the OSB quirk works differently to the channel-reversal repair time described here, so don't assume they're the same five minutes.
How to make sure you never need it
Check phase and channel assignment against your own notes before you're anywhere near the judging queue — not from memory, from a written sheet you made during your own install. Know roughly how long your judging slot actually runs so you're not trying to fix a wiring fault while also watching the clock for an unrelated reason. And once you're scored, read your run properly using the breakdown in how to read your EMMA scoresheet — a listening-pleasure deduction from a locked screen looks very different on paper to a genuine tuning weakness, and you want to know which one you're dealing with before you change anything for next time.
None of this is complicated. It's just one of those rules nobody mentions until it happens to them. Sort your cables, kill your screen timeout, and the five-minute rule becomes something you never have to think about on the day. If you're still working through your install and want a second set of eyes before you ever reach a judging bay, our DIY install guidance is a good place to start, or get in touch directly.
Written by Pete — Integrated Audio
Pete is the founder of Integrated Audio and a Certified International EMMA Head Judge, judging EMMA Sound Quality and Installation competitions in Australia and internationally. He writes from the judging side of the table, drawing on hands-on experience building and installing HELIX, MATCH and BRAX car audio systems.