HIVI B3S Enclosure Feedback?

heemid · 8th August 2011, 03:23 PM

I really like the design of the Zaph B3S, just wanted something a little smaller. All sides will be made of 3/4" Birch or Bamboo. Volume is calculated at 146.25 cubic inches (~2.4 liters). External dimensions will be 7"x 4.75"x 9" (lwh). Is there a reason to have the driver positioned in the center like on the Zaphs? Aesthetically I like them off a little. Any glaring concerns with this enclosure design? Thanks.

sreten · 04:21 PM

Hi,

I cannot see any issues at all. With the driver Vas being 0.8L the box is
big for the driver and you could reduce H and D a little for ~ 2L internal.

If being high passed filtered (AV set to small) Vbox 1.5L to 2.5L.

Driver centre 0.6 of baffle height is the classic ratio.

rgds, sreten.

I think they are placed centrally so it can be used as a centre on its side.
Offsetting them to 0.6 won't effect things much, the width = main issue.

boris81 · 8th August 2011, 04:13 PM

Placement DOES affect the Frequency Response. If it's very different than the original you will need to modify the Baffle Step Compensation filter.

Edge is FREE software that can simulate the resulting Frequency Response for given placement. It can also help you design the BSC filter. It's trivial to use.

boris81 · 8th August 2011, 04:25 PM

Actually I think sreten is right.
I was giving a theoretical advise. In practice the difference is probably minimal and can be safely ignored. You may run the simulation to be safe.

borispm · 04:32 PM

The other Boris, I guess the baffle width affects the baffle step more. Placement does affect frequency response but I suspect you may not need to modify the BSC for that, as long as the speakers are placed on the "right" side... I am with Sreten on this, just do what you're doing. (Oh, the other Boris had added that. Sorry for overlapping but I'm keeping this just to let you know there are more supporters on this matter.)

And for BSC, it depends on your placement. If they are intended to use on desktop, you may not need BSC at all, or maybe just 3dB. I've made a pair of bipole speakers and they sound too boomy, so don't try to have 6dB of BSC.

8th August 2011, 03:23 PM	#1
heemid diyAudio Member Join Date: Mar 2008	HIVI B3S Enclosure Feedback? I really like the design of the Zaph B3S, just wanted something a little smaller. All sides will be made of 3/4" Birch or Bamboo. Volume is calculated at 146.25 cubic inches (~2.4 liters). External dimensions will be 7"x 4.75"x 9" (lwh). Is there a reason to have the driver positioned in the center like on the Zaphs? Aesthetically I like them off a little. Any glaring concerns with this enclosure design? Thanks.

8th August 2011, 04:08 PM	#2
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, I cannot see any issues at all. With the driver Vas being 0.8L the box is big for the driver and you could reduce H and D a little for ~ 2L internal. If being high passed filtered (AV set to small) Vbox 1.5L to 2.5L. Driver centre 0.6 of baffle height is the classic ratio. rgds, sreten. I think they are placed centrally so it can be used as a centre on its side. Offsetting them to 0.6 won't effect things much, the width = main issue. __________________ There is nothing so practical as a really good theory - Ludwig Boltzmann When your only tool is a hammer, every problem looks like a nail - Abraham Maslow Last edited by sreten; 8th August 2011 at 04:21 PM.

8th August 2011, 04:28 PM	#5
borispm diyAudio Member Join Date: May 2010 Blog Entries: 1	The other Boris, I guess the baffle width affects the baffle step more. Placement does affect frequency response but I suspect you may not need to modify the BSC for that, as long as the speakers are placed on the "right" side... I am with Sreten on this, just do what you're doing. (Oh, the other Boris had added that. Sorry for overlapping but I'm keeping this just to let you know there are more supporters on this matter.) And for BSC, it depends on your placement. If they are intended to use on desktop, you may not need BSC at all, or maybe just 3dB. I've made a pair of bipole speakers and they sound too boomy, so don't try to have 6dB of BSC. Last edited by borispm; 8th August 2011 at 04:32 PM.

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8th August 2011, 04:13 PM	#3
boris81 diyAudio Member Join Date: Oct 2009 Location: white plains, ny	Placement DOES affect the Frequency Response. If it's very different than the original you will need to modify the Baffle Step Compensation filter. Edge is FREE software that can simulate the resulting Frequency Response for given placement. It can also help you design the BSC filter. It's trivial to use.

8th August 2011, 04:25 PM	#4
boris81 diyAudio Member Join Date: Oct 2009 Location: white plains, ny	Actually I think sreten is right. I was giving a theoretical advise. In practice the difference is probably minimal and can be safely ignored. You may run the simulation to be safe.

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