Every seed topic on my EMMA FAQ list has now got its own page, so today I'm answering something I get asked almost every event weekend instead: does a brand-new system need time to "settle" before you roll it into judging, or can you finish the install the night before and still score well?
Why a freshly finished system sounds different a week in
A car that's just come off the bench almost never sounds the same a week later, for reasons that have nothing to do with the tune. Driver surrounds and spiders are still mechanically stiff when they're new — they loosen up with use, which shifts low-frequency output and damping slightly as the suspension of the cone breaks in. Sound deadening and damping mat take time to fully bond to the panel, especially in cooler weather. Door cards, kick panels and any new trim settle into their fixings after a few open-and-close cycles and a few hours of cabin heat cycling, which changes rattle points and seal integrity — both of which affect what a judge hears, not just what shows up on an SQ scorecard.
None of that is EMMA-specific. It's just how speakers, adhesives and trim behave, and it's the same reason a brand-new car stereo install from any shop benefits from a proper settling and re-check period — see our general notes on car sound upgrades for the installer's side of that.
What I actually see as a judge
The systems that struggle most on the day aren't badly built — they're unfinished builds wearing a finished badge. The DSP curve was set once, on install day, and never revisited once the car had actually lived with its new deadening and panels for a week.
A system tuned the same day it was finished is a system tuned for a cabin that doesn't exist yet. By the following week the resonances have shifted, sometimes only slightly, sometimes enough to move a null or a peak right into the frequency range a judge is listening across for tonality and staging.
How much lead time is actually enough?
I can't give you a magic number of hours — nobody can, because it depends on driver size, adhesive type, climate and how many hours you actually drive the car — but as a practical target I tell competitors to have the system fully installed, driven and played for at least a week, ideally two, before they do their final tune. That's separate from the physical install-quality prep covered in the week-before install checklist; this is about giving the system time to become itself before you lock in the sound.
Finished the car late anyway? Here's the honest fix
If you're up against it and the install only came together days before the event, don't chase a perfect curve from memory or from how it sounded in the workshop. Re-tune on your actual reference material in the car, on the day if you have to, rather than trusting settings dialled in before the cabin had settled — the ear training and reference listening page covers how to use familiar tracks to judge what you're hearing rather than what you expect to hear. A system that's honestly tuned late beats one that's confidently tuned early to a cabin that no longer exists.
It's also why I'd rather see a competitor bring a system that's a year old and well understood than one finished the week of the event and never re-checked. Judges score what's in the car on the day — not how recently it was built. If you're planning a build with competition in mind and want to talk timelines before you start, our DIY install notes and the contact page are both there for that conversation.
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.