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Old 2nd July 2008, 07:58 PM   #1
mr.duck is offline mr.duck  United Kingdom
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Default Sealed bookshelf designs available?

Hi, I am quite ignorant with the loudspeaker design. But I have an idea of building sealed fullrange bookshelf speakers with no filter... is it possible? I am not needing very deep bass (for that I think a subwoofer is needed). But I am wanting very good sounding speakers that can make beautiful music like high end audiophile speakers. I would prefer to copy some one else's project. But I have not been able to find any sealed bookshelf designs. Is it a bad design?

I am wanting to have a more efficient speaker if possible (i know sealed is not most efficient). So I think Fostex would be better than Jordan. Is there any recommendations?
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Old 2nd July 2008, 08:13 PM   #2
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Sure you can do it, if you accept that they're likely to have very little grunt under about 200Hz at all. You're not giving us much to work on. How big? How expensive? How do you define 'beautiful music'? What sort of material are you planning on playing through them? What woofers will you partner them with & how high can they go effectively?
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Old 2nd July 2008, 08:43 PM   #3
mr.duck is offline mr.duck  United Kingdom
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Size: Bookshelf. Speakers I have now I would call standard bookshef size. They are 13.5 litres (18cm x 25cm x 30). Edit: that is the external dimensions.

No budget, depends on performance and if it is worth the cost. Of course a less expensive design would be better if possible.

Beautiful music is every good quality that is desired such as an overall neutral and detailed presentation without the bad qualities such as harshness. But it should also sound musical and involving, not like a studio monitor.

I would hope they can cope very well with any music being played through them, but I tend to go for a refined and delicate sound that would be good for classical (although I don't really listen to any classical music). Does that make sence?

What woofers will you partner them with & how high can they go effectively? Not sure what you mean by this. Fullrange has single speaker not woofers and tweeters.

If they won't have much bass below 200Hz then I am starting to change my mind!
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Old 2nd July 2008, 08:47 PM   #4
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I have a series of short articles coming up called:

Lowther-in-a-box

Fostex-in-a-box

Jordan-in-a-box

All dealing with full range drivers mounted in small
sealed enclosures and attached to cheap commerically
available active woofers.
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Old 2nd July 2008, 08:51 PM   #5
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There you go. Nice one Nelson.
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Old 2nd July 2008, 09:40 PM   #6
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Excellent. My eyebrow is cocked in appreciative consideration.
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Old 2nd July 2008, 10:19 PM   #7
REC1 is offline REC1  United States
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All dealing with full range drivers mounted in small
sealed enclosures and attached to cheap commerically
available active woofers.

This makes sense to me.

ron
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Old 3rd July 2008, 01:03 AM   #8
gychang is offline gychang  United States
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Quote:
Originally posted by Nelson Pass

Lowther-in-a-box

Fostex-in-a-box

Jordan-in-a-box

any chance for cheapo-in-a-box?

gychang
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Old 4th July 2008, 01:32 AM   #9
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Sealed designs are very forgiving and almost impossible to screw up. Get WinISD and model up some boxes. Just make sure the driver you pick gets low enough to cross over to a sub. I like to keep the XO point below 100Hz. You will likely want to add a BSC as well.


I've tried the FE127E and JX92S in sealed enclosures crossed to an active sub with very good results.

Cheers
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Old 4th July 2008, 02:50 AM   #10
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Tangband in a box also works very well.

http://www.zillaaudio.com/tb-1320-bamboo.htm

I have had great results with the 3 inch TBs in sealed boxes and the 4 inch bamboo in a ported box. It will work in a sealed also.

Pioneer B20 is one of my favorites in a sealed box.

Both the B20 and the TB bamboo benefit from tweeters.

Godzilla
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