Ported, Sealed or Transmission Line


What are the pros and cons of ported, sealed and transmission line speaker cabinets?

Is one inherently better than the other?

Some Proac speakers use what looks like a bunch of straws in the port. Is this an attempt to create graduated friction similar to a transimission line to increase base from a smaller speaker?
cdc2
Although I am not sure Sean meant to suggest that the straw trick for reducing port turbulence or "chuffing" is pure snake oil, I quite agree with him that you need to do some reading. There is much more to this question than you will conceivably get here, and you need a balanced view of your own.

That said, I am just as willing as anyone else to display my ignorance in public.

Any speaker design can result in a pleasing sound or not, depending on how it is implemented. Every design is built around tradeoffs--you win on the roundabouts and you lose on the swings, as the British say. Sealed enclosures have a relatively low resonant 'Q' but the actual resonant frequency will be higher than that of an equal-sized, properly ported box. Sealed box designs need more amplifier power, on the whole, because the cones have to work against the very stiff spring of the air trapped inside the box.

Knew that ? Great stuff. There's more. My supposedly humble opinion is that until you appreciate the tradeoffs involved in any audio design, you don't really appreciate the design.
The straws? cuts down on port noise I've read. Ported speakers are designed to increase bass response of small speakers...a way of outputing the rear wave as energy to combine with the direct sound. I'm not a big fan but do own some of these type speakers...they work as long as you don't over-drive. I'm a planer man myself...which is another set of problems!

Dave
Check your local library and they'll usually have a few books on the topic. Weems' (David) might be better for what you need to know: just to get some general insight. The tone of the book is still quite contemporary despite looking 10years outdated. A two week checkout should be enough. Dickason's book isn't bad and more technical in every way that Weems'. Its a good book to have too, but get some momentum through something simpler. The answer to your question is kind of hard to answer in a condensed straightforward manner.
Is one inherently better than the other?

That question's answer is (IMHO) no. But, they do have real differences and performance tradeoffs, and other tradeoffs.