sub bottoming out

what is downfiring? when the subs are tword the sky, or the ground or what. i'm confused?southsider

Down firing is when the magnet is outside of the box, and the face of the speaker is in the box.  So its really just when you can only see the magnet.

thankssouthsider

Downfiring is anytime the speaker cone is aiming down, whether the magnet is inside or outside the enclosure.  Upfiring is anytime the speaker points up.  Proper orientation for most drivers is with the speaker cone perpendicular to the ground.  JBL woofers are some of the best suited for down-firing.  Any speaker with a large Xmax.Support the12volt.com

thank usouthsider

Yeah....dyohn is smart.  Dyohn...Did you go to school for this stuff?

f150on22s wrote: Dyohn...Did you go to school for this stuff?

Well, not to school for car audio per se, but I am an acoustical engineer and sound system designer and I've been working in professional sound, radio, television and film since 1973.  So you see, I'm just an old dude who's learned a lot from being around for ever.  :)

Support the12volt.com

dyohn is the shiznit.southsider

dyohn, my infinity perfect dvc 12.1d has (fs)23.32 and (xmax) 14.15mm. i did your calculation for sag and got some crazy number. i multiplied both and divided it by 24,849. im trying to find the sag percentage. thanks for the advice. i had no clue about sag and im sure thats why im experiencing problems, because the excursion distance is too great, right? theoretically, would a stiffer surround help the situation?owner of

Motion Marine & Car Audio

the florida keys

actually the sub must be designed for mass excursion. the surround doesnt matter? i think i understand the theory.owner of

Motion Marine & Car Audio

the florida keys