Ehh how do I find subwoofer displacment ?? And measure port ??

[THATpurpleKUSH 5,000+ posts]

also that would help with port noise theoretically ?? cause when you use smaller box and crank it up it may give a whistle ??
or is that what you meant by efficient //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

sorry guys .. told u im rusty

port noise has to do with the size of the port or obstructions in the airflow through the port.

I'm no expert by any means but from what I understand, efficiency of large boxes come from allowing the woofer to reach xmax sooner than in a small box, given the same amount of power. I also think that large boxes rise less through the impedance curve, but there are others that say that smaller boxes have less impedance rise, I don't have the equipment.... yet, to test that theory.

 

[dedwardk]

Well thanks for your help and time !!