audioholic 5,000+ posts
not a moderator
Not below it, that's for sure. That is what someone above was referring to when they said dont unload your sub. As your signal freq moves further and further below the enclosure's tuning, cone excursion rises, rapidly. You dont have to deviate very far below tuning before your sub will start to bottom out due to this loss of cone control from the enclosure. This is why people use subsonic filters, to block any signals too low for their system's tuning freq.Cause Im still kinda confuse on this Hz ****. My box is tuned to 38Hz so what would be the best test tone that would get loud. Above 38hz, 38Hz, or below?
Generally, most SPL competitors seem to tune about 8-10 hz below their vehicle's resonant freq, then burp at that resonant freq. Talk to an actual SPL competitor to get more details.