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#146029 - 08/22/06 03:13 PM Can you use rear ported speakers in bookshelf
bean Offline
regular

Registered: 08/22/06
Posts: 7
Loc: New Orleans, Louisiana
I was ready to order my Axioms when I was told you shouldn't use rear ported speakers in a book shelf cabinet?

Any info out there would be appreciated?

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#146030 - 08/22/06 03:44 PM Re: Can you use rear ported speakers in bookshelf [Re: bean]
Ken.C Online   content
shareholder in the making

Registered: 05/03/03
Posts: 17766
Loc: NoVA
While the rear port is often cited (incorrectly) as the reason, you should not use any speaker in an enclosed area (such as a bookshelf) due to reflections and boundary effects.

However, in real life, compromises must be made, so as long as there's some room around the things, they should be ok.
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#146031 - 08/22/06 04:21 PM Re: Can you use rear ported speakers in bookshelf [Re: bean]
Ajax Offline
axiomite

Registered: 12/30/03
Posts: 6250
Loc: Cleveland, Ohio
Hi Bean,

You might want to read this, and #9 in this.

These comments apply to all speakers, not just Axioms. Regardless, I well echo Ken's comment that, often, compromises must be made.
_________________________
Jack

"People generally quarrel because they cannot argue." - G. K. Chesterton

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#146032 - 08/22/06 05:34 PM Re: Can you use rear ported speakers in bookshelf [Re: bean]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13331
Loc: Iowa
Can you, yes, would I, no....Bass ports filter low bass out of the ports, I would not want to conceal them in a cabinet.
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#146033 - 08/22/06 05:46 PM Re: Can you use rear ported speakers in bookshelf [Re: SirQuack]
Ken.C Online   content
shareholder in the making

Registered: 05/03/03
Posts: 17766
Loc: NoVA
I don't know that I would push someone away from Axioms merely based on port placement--like I said, no speaker is going to sound (as) good enclosed like that.
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#146034 - 08/22/06 05:51 PM Re: Can you use rear ported speakers in bookshelf [Re: bean]
Wid Offline
axiomite

Registered: 06/22/03
Posts: 6720
Loc: The Peoples Republic of Il.

I agree with Ken on this, the port is not the most important thing here, it is the other boundries. If you can get the baffle of the speaker out just enough so that it is not enclosed you should do fine. Not the best mind you but your results should be satisfactory.
_________________________
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"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud


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#146035 - 08/22/06 07:51 PM Re: Can you use rear ported speakers in bookshelf [Re: Wid]
tomtuttle Offline
axiomite

Registered: 06/20/03
Posts: 8283
Loc: Tacoma
Well, I don't want to start a ruckus or anything, but...

My understanding is that it is ILLEGAL in certain counties to use a ported speaker in a cabinet.

Just another example of the great work our government is doing to protect the masses from themselves. I mean, who KNOWS how horrible our collective audio experience would be if people were allowed to put their own speakers wherever they damn well please, and wherever sounds best to them? Furthermore, I understand that SOME scofflaws actually MOVE their speakers to different locations - even from bookshelves to stands of differing heights - throughout the course of their ownership! Fortunately, there is legislation making it's way through congress right now to ensure that all American speaker installations can only be performed by licensed technicians, and all mounting must be made permanent by chemical or mechanical means sufficient to ensure that moving the speakers after their initial installation will be impossible without dissembling them.



Seriously, ANY speaker is going to sound suboptimal if you put it in a bookcase. Don't worry about the ports. However, if you're going to lay the M22 on its side, too, you might be better off with an upright M2 or M3 instead.
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#146036 - 08/22/06 08:34 PM Re: Can you use rear ported speakers in bookshelf [Re: bean]
bridgman Offline
axiomite

Registered: 08/25/04
Posts: 5374
Loc: Bowmanville, Ontario, Canada
I think it depends on the bookcase. If the bookcase is open shelved, or if the space allocated to the speakers is big enough so that there is at least a few inches above or beside the speakers then the rear porting shouldn't make much difference.

If the speaker is being snugged into a closed space roughly the same size as the speaker then rear porting will be much more of a problem.

I second all the other comments that the front boundary effects are at least as important.

You are essentially sliding the speaker into an open box -- unless the fronts of the speakers stick out a bit past the surrounding shelves the resulting sound is going to be... dare I say it... boxy.

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#146037 - 08/22/06 11:24 PM Re: Can you use rear ported speakers in bookshelf [Re: bridgman]
BrenR Offline
connoisseur

Registered: 12/10/03
Posts: 3602
Loc: Winnipeg MB Canada
Quote:

the resulting sound is going to be... dare I say it... boxy.




Is that boxy or boxy?

Bren R.

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#146038 - 08/23/06 12:18 AM Re: Can you use rear ported speakers in bookshelf [Re: BrenR]
bridgman Offline
axiomite

Registered: 08/25/04
Posts: 5374
Loc: Bowmanville, Ontario, Canada
Um... more like the Volvo, I think.

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