Very cool video, Erin. And thanks for sharing your downfiring results jdunk (I will be trying that with my JL soon). I wonder if you are seeing that boost because you have effectively changed the length of the car (or the dimension it is measured in) as Erin referred to as the cause of the subwoofer null. My guess is that all the other positions you tried didn’t effectively change the “acoustic car length” as much as downfiring did?
I was wondering. Are these measured nulls (via RTA and mic) something that our ears/brains do NOT experience? As in, even though the dip is there in the acoustic response, our ears would tell us otherwise?
And related to this, is the pulling of the sound to the drivers side occurring because we have RTA’d the sides to match, and boosted the hell out of that speaker, causing us to hear it play much louder at say 80hz than the passenger side (when what we see on RTA is that they are level matched)? Just trying to make sure I understand what is occurring here...
Thanks!
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