A sine for setting gain, a slow sweep for hunting rattles and cabin resonance, and burp bursts for measuring. Play them here, or save them as WAV and take them to the head unit on a USB stick.
What should it generate?
what you hear is exactly what goes into the WAV
Settings
Play
set the volume on the head unit, not here
Frekvencia
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Hossz
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Szint
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Go easy on the sub. A sustained sine is nothing like music: at full power it can cook a voice coil in seconds, because there is no let-up in it. Start quiet, measure in short bursts, and let it cool.
What each one is for
in practical order
Setting gain — steady sine. 50 or 60 Hz at 0 dBFS. This is what the multimeter method needs; the target voltage comes from the amp setup calculator.
Hunting rattles — slow sweep. From 20 to 80 Hz over 60 seconds. Sit in the car, and wherever the trim or the number plate starts buzzing, hit the mark button. At the end you have a list of what needs taping down.
Cabin resonance — the same sweep. This time do not listen for rattles, listen for where it suddenly gets much louder. That is the frequency where the car itself boosts — worth tuning the enclosure to it.
Stereo check. On the steady tone, switch on the left channel inverted option. If the system is wired correctly this makes the sound quieter and diffuse. If it gets louder instead, one of your speakers is wired backwards.
Burp. Set the frequency and the length and you get a competition-ready file. Do not take the attack to zero: a hard start spikes the peak, but it rarely helps on the meter and it does cost you excursion.