Just a question out of curiousity. Some speaker designs are sealed & others are ported. Now granted, the designer had specific goals in mind for their performance by choising one of the two designs. What is the real difference between the two? Does a ported speaker provide more bass than a sealed speaker? Does one design perform better than the other, & if you were to stuff the port holes how would it effect the speakers performance? Could that possible harm the speaker? I think it's all about moving air inside the cabinet. In a sealed design where does the air go or maybe it doesn't. I guess either design has it's +/-. Any thoughts?
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I don't know about harming the speaker, I'll let someone else answer to that... but I know it takes less power to move a speaker when it is ported than when it is closed.Hello, my name is Eric and I am a music addict. -
Ports can also be tuned to boost certain frequencies. Plugging the ports will reduce this boosting. A lot of manufacturers actually include plugs for when you have to have the speakers in cabinets or close to walls (which generally boost the same frequencies the ports do).
I usually use a sock-tube in testing if they didn't include a plug. You won't hurt anything. My SVS subs actually have three ports. Plugging one of them extends the output down another 8hz, but reduces the output by 3db.
Kevin D.Comment
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In the area where the port is active, it actually takes a lot more power to move the speaker a given distance than with sealed, although you get more output, due to the port's resonance...that's the whole idea behind reflex.Originally posted by Thelonious FunkComment
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Drivers have different Theil/Small parameters depending on whether they're designed for a sealed application, ported, or dipole. The Qts is lowest for the reflex type, and if you convert it to a sealed design by plugging the port, it will probably be over damped and have less bass output than a sealed system of the same size designed that way.
In some circumstances you may find that desirable, such as if you've placed the speaker in a corner too lose to walls, and it becomes bass heavy. Normally, a better solution is positioning the speaker properly.
JMO.the AudioWorx
Natalie P
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I’ve got to place my rear speakers nearly right up against a wall. These will be Modula MT’s used for rear speakers in a 5.1 system, with a sub. Perhaps I should plug the ports. This compromise doesn’t really bother me because it’s just for rear speakers- it’s not the main speakers for music.... -
I recently decided to build a custom bluetooth boombox that looked like the rear end of a super car. I didn't want it to look exactly like a current supercar, so I looked at some that I really liked and then added my own flare to it. Here are some quick notes about it.
- Kerf to get
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This is a guide intended to help people locate and choose between DIY Speaker Designs completed here at HTGuide's Mission Possible DIY Forum or by friends. These are designs that you can have confidence in. These designs are fully documented and ready for building. These designs were based on in-box... -
I am looking to possibly replace my NHT Classic 12 Subwoofer with something of my own making. I am thinking of using the Dayton Reference HF 12" as the subwoofer for the application. I would really like to go with a ported design and I think that a box 17"w, 18"h, and 22"d should... -
Hi all,
I started out wanting to build some simple speakers, and the more research I did, the more I wanted to have a really nice set of speakers. Eventually, I stumbled onto Jim and Curt's designs and I am now building the Statement II's.
I have read just about every Statement and Statement...
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