type x vent

If you didn't like what ABC Corp put out then you are a worthless loser. We spent billions on advertising, billions on executive bonuses, and gave our designers and engineers a 40 dollar budget and 5 hours to come up with that design. Your ears suck! Get a new pair!

Love,

Owner of ABC Corp.

Oh, yeah...

+1 on what audiocableguy said too. I was too busy bashing coporate america to use my logic parts...

The 8:1 ratio is a guild line but only aplies to a certain frequency.

To answer some questions: You should have at least 3" of clear space in front of the port...this is a guild line...anything that impeads the movement of the air in the port will change the frequency that it resonates at or it 's tuning..

Yes as the frequency aproaches the tune of the port it is producing more of the sound...another reason you want the port out in the open. There is an effect called coupling that you can take advantage of with the port facing the ground. If you make the bottom of the box a uniform (well mostly uniform) distance from the floor...oh say 2 '', then the "Slot" that it forms can actually increase the output. This is also know as slot loading. This same effect can be used when placing two woofers next to each other because both cones are moving in unison they will also move the space of air between them effectively increasing the size of the moving area in front of the two speakers....

the port demensions are based on the ratio of the area of the openingof the port to the port length; so bigger opening means longer port. But don't fall into the trap that if you increase the port opening size you just increase the length the same ratio as the smaller port. There is another ratio involved that takes into account of the port volume vs. the box volume. this ratio is NOT linier! The shape has very little or nothing to do with how it functions unless, as stated earlier, it gets too small and begins to whistle. So as long as the the area is the same the port lenght is the same.

Also as long as you don't change the area of the opening of the port tube you can bend it to fit your space. Ask Haemphyst about folded transmition lines and why the are called folded...Think of of a trumpet