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Place Sub in enclosure?
#279349 11/17/09 03:32 PM
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Forgive me if this has been covered in the previous 640 pages.

I'm building a base for my TV in which I hope to place my Subwoofer (soon to be ordered EP350). Other than the fact that I may be unlucky and have to move the Sub off to the side, are there any other negatives to putting a Sub inside an open front base?

Carl

Re: Place Sub in enclosure?
Carl #279351 11/17/09 04:10 PM
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my father in law has a 8" sub just under the tv inside the cabinet and it works really well.. but he does not listen to movies or music at the same level as I do..


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Re: Place Sub in enclosure?
Carl #279352 11/17/09 04:14 PM
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Sub placement in a room is very important, every room is different. Most likely that position will work, but won't be the ideal position for the room. Most people experiment with various locations to get the best sound, may be the corner, may be the side wall, etc...

The frequencies from a sub are low and emit in all directions, not sure it would be a good idea to put it in an enclosure.


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Re: Place Sub in enclosure?
SirQuack #279364 11/17/09 06:04 PM
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I've had a sub in an enclosure of a wooden TV stand with only the front open (the speaker is pointing towards the front), and it has been working for me. Although not a very powerful one, since it's just a Sony HTIB.

Re: Place Sub in enclosure?
Carl #279365 11/17/09 06:15 PM
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Hi Carl,

It's not a great idea because it potentially limits the performance the sub will be capable of. The EP350 is an extremely capable subwoofer and it deserves to be ideally positioned in the room.

You could always try it, of course; you might get lucky. On the other hand, I worry about the surrounding cabinetry and the potential coloration that might result. As others have noted, subwoofers radiate in all directions below about 80 Hz and are designed to be operated more or less in free space. The cabinet interference might do unpredictable things. The sub also may cause the cabinet you are building to resonate at various frequencies.

Regards,
Alan


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Re: Place Sub in enclosure?
alan #279384 11/17/09 07:45 PM
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This is an interesting topic for me since i am currently designing my new room. I had planned on building out some columns that would be wide enough and deep enought to recess the sub (ep350) inside. The columns would be drywall and studs with a stone (fake) facade on the outside for appearance. I was under the impression that as long as the sub was on the ground and the woofer facing outward I would get the proper sound. Seems i am wrong.

So you are recommending against this sort of thing? So much for making the wife happy..... She is thrilled that i am placing my fronts and centers behind the screen already so maybe she'll have to deal with this one!


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Re: Place Sub in enclosure?
aspicer1 #279393 11/17/09 08:04 PM
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I built a HT closet and placed my EP800 inside of it facing out. While it worked, it sounded amazing. However, I did notice when I went inside the closet that there was a lot of bass that eminated from the rear of the subwoofer (even though it's a sealed box) that was getting trapped inside the closet. Since it stopped working before I ever got a chance to bring it outside of the closet to play around with placement, I can't say whether or not it made a huge impact or not.

It did still sound incredible, I'll say that. So I would say it if it's a must for WAF, then don't be too scared to do it. While it may not be ideal, it will still probably be acceptable.


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Re: Place Sub in enclosure?
aspicer1 #279394 11/17/09 08:06 PM
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Just to let you know the effect a powerful sub could have on that drywall.... I'm not an overly loud listener and have my sub tuned to match my speakers so it's not cranked by any means. However, in a good movie scene like the depth charges in U-571 and many others, my drywall can and does shake, even on the far side of the room.

It's not detaching from the studs or anything but you can feel it if you are leaning on it and on the far side of the room, the adjoining room is unfinished and I can't leave anything leaning against the inside of the drywall or I will hear it resonate. I also have to slightly open the door to the closet under the stairs and the adjoining room or they vibrate in the casings.

A good sub is a powerful device. Don't hide it away in drywall paneling as it will likely reduce the sound quality a good bit and just might shorten the life of the panels. ;\)


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Re: Place Sub in enclosure?
Murph #279402 11/17/09 08:32 PM
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Ok Good Advice! I'll think on this one.....

Micah... forgive me...what is WAF?


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Re: Place Sub in enclosure?
aspicer1 #279403 11/17/09 08:32 PM
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Hi aspicer,

Murph's points are well-taken. It's not so much that I'm recommending against it if you have no alternative; it's that when Axiom designs and measures its subwoofers, they are designed to work sitting on a floor in "free space" and that is how they're measured as well. The Axiom sub has its own carefully tuned enclosure. Putting it inside another enclosure introduces a completely unpredictable element.

Your particular room, the sub's location in the room, and the listening area/couch/seats' locations are all elements that combine to determine the quality and quantity of deep bass you'll receive (in addition to the subwoofer's intrinsic performance). It's difficult enough getting all those factors working in sync without further complicating matters by adding another unknown variable--putting the sub inside another enclosure.

Regards,


Alan Lofft,
Axiom Resident Expert (Retired)
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