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Guest atilsley

Open Baffle Speaker Pics

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Guest atilsley

I think the simple clean lines of this OB are very good....good pricing also.

 

Here's some pics of OB's I found....quite nice.

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post-103876-0-46986900-1399464957_thumb.

post-103876-0-47216300-1399464977_thumb.

post-103876-0-83732300-1399464992_thumb.

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Guest atilsley

Now, what about OB AND horn...?!?

 

Ooh.

post-103876-0-43429200-1399465982_thumb.

post-103876-0-91151300-1399466001_thumb.

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It strikes me that a lot of these open baffles are too small to support low bass.

 

Plenty of width coupling to the floor, helps too in this regard.

 

And central/symmetrical driver placement tends to reinforce/concentrate front/rear cancellations at specific freqs.

 

Otherwise, very pretty designs! :)

 

Cheers, Owen

Dark Lantern blog - http://darklanternforowen.wordpress.com/

Edited by Owen Y

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Narrow OBs are fine, they just need a correctly designed crossover/EQ

and high xmax woofers if qts less than 0.6

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Guest atilsley

Bert Doppenberg's OB....way cool. Uses x4 15-inch BD woofers/side.

 

I've started to build the half version...thinking about using x2 Altec 416's/side. Project stalled. Frames built.

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post-103876-0-74214100-1399609092_thumb.

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Bert Doppenberg's OB....way cool. Uses x4 15-inch BD woofers/side.

 

I've started to build the half version...thinking about using x2 Altec 416's/side. Project stalled. Frames built.

 

Any links for more info on this?

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and high xmax woofers if qts less than 0.6

 

Always more excursion or additional/larger drivers   ;)

 

The Qts isn't relevant to xmax at all  

 

....  but a component of it, Qes can be relevant to power handling.     In the case where you have a high Qes driver, and an amplifier with >> 0 output impedance.   This produces extra efficiency at system resonance, which may help if Pe (power handling) is your limit.    I posted a picture of this in another thread of your recently.

 

Wings or H frames can be very effective at extending the baffle of a bass dipole speaker.... but they do detract from the style of a traditional 'OB'

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Always more excursion or additional/larger drivers ;)

The Qts isn't relevant to xmax at all

.... but a component of it, Qes can be relevant to power handling. In the case where you have a high Qes driver, and an amplifier with >> 0 output impedance. This produces extra efficiency at system resonance, which may help if Pe (power handling) is your limit. I posted a picture of this in another thread of your recently.

Wings or H frames can be very effective at extending the baffle of a bass dipole speaker.... but they do detract from the style of a traditional 'OB'

yeah sure, but we are discussing about flat baffle, no U, H nor W baffle was mentioned.

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yeah sure, but we are discussing about flat baffle, no U, H nor W baffle was mentioned.

 

Sure... I know they weren't....  until I bought them up at the end of my post as a way to help excursion/power handling    (because aside from EQ, or more drivers, it's about the only other option)

 

 

The main point of my post, was that the Q of a driver has no bearing on how much Xmax you will need.      If we had 3 drivers, same size, all with very different Q .... then they still need to move the same amount to make the same output.   Thave all have identical excursion

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