Generic sealed question..

[MattB 0]

If someone was going to build a sealed enclosure, and the woofer in question listed a box size of, say 0.75^3 to 1.5^3, how do you determine what size ^3 would best suit the woofer? Is that something that the tsparameter would tell you? Or, just build something in that size range and get equal results??? Just curious...

[Aaron Clinton 2,372]

most companies will post or list the reccomended sealed enclsoure size,

in some cases like Power Bass, they list extensive different enclosure designs for different sound goals

[Nikuk 1]

for sealed, you wanna get the G of the encolsure to .707.

Wait for Tirefryr....

[Aaron Clinton 2,372]

for sealed, you wanna get the G of the encolsure to .707.

Wait for Tirefryr....

......wait for it......wait for it.......

sorry for the hijack

[Tirefryr 1,742]

Here's a great site if you want to gain some knowledge. .

http://www.diysubwoofers.org

Generally a Q 0f .707 is theoretically supposed to yield the flattest response throughout the usable frequency range of the driver. However most testing is done in an anechoic chamber and a vehicle will have cabin gain which will boost lowend output tremendously. I'm sure you know what I'm talking about.

When building a sealed enclosure you first have to set your performance goals. A larger enclosure will yield potentially deeper bass and more lowend extension, but it will also tend to provide muddy bass or boominess. It will also lower the thermal power handling of the driver. A positive side to that is it increases efficiency pretty much negating the lower power handling factor. I generally keep a couple test enclosures on hand to determine a near adequate size for my goals. This is not always possibled for some people due to constaints on space.

After you set your goals, it's time to move onto space. Do you have the available space to build a larger enclosure? Are you stuck building the compact enclosure? See what I'm getting at here?

There are a ton of places you could really go with this, but ultimately the 3 things I use to determine enclosure size are space, power on hand, and tuning functions. A smaller enclosure may not give you the lowend extension you are looking for, but if you have an EQ to boost that region, you can easily go with the smaller enclosure and still have the effects of a larger one.

Pick up a copy of the Loudspeaker Design Cookbook. It's a tool every enclosure designer should have.

[Aaron Clinton 2,372]

I need to buy that book, Dave was on my case for not having it

[ANeonRider 3]

I need to buy that book, Dave was on my case for not having it

<{POST_SNAPBACK}>

Same here, lets have a looksie on ebay...

[Tirefryr 1,742]

Best bet is right here.

http://www.amazon.com/exec/obidos/tg/detai...=books&n=507846

[CBFryman 2]

i was looking...and it seems the Q is 5 keys away from the G...hmmm....in car you want to shoot int hte 0.800-0.900 range...though some like it as high as 1.00+

[Tirefryr 1,742]

i was looking...and it seems the Q is 5 keys away from the G...hmmm....in car you want to shoot int hte 0.800-0.900 range...though some like it as high as 1.00+

It's all user-dependant. I would say there's something you WANT to shoot for definately. My box in my pickup has a Q of around .589 yet it gets very low with the driver placement and transfer function.

[MattB 0]

Thanks for the info. I have threatened to buy that book for 10+ years now