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My BassHorn VS Martin WSX
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mstep77 View Drop Down
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Joined: 19 July 2006
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Points: 457 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mstep77 Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2008 at 6:31pm
nice design mate, that is gonna be seriously loud.
One thing to note with designs with two drivers in (assuming they are wired in parallel and are 8R) is that the box will have an overall impedance of 4R (as I'm sure you know) so in hornresp you should set the input voltage to 2V instead of 2.83V to give the true 1w/1m reading.  obviously the box will have twice the power handling though Smile

Best regards,

Matt
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Amano View Drop Down
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Points: 219 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Amano Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2008 at 6:43pm
Originally posted by Deadbeat Deadbeat wrote:

Clap Congratulations.

Real nice double 18 push-push.

One thing you might want to do is consider the angle on the drivers.

No rear chamber?

Yes. There is no rear chamber.. Drivers are in open air... Wink
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Amano View Drop Down
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Points: 219 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Amano Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2008 at 6:44pm

I think, it can be a good change of LABs... Much lower bass...

It looks like dual inverted scoops whith a small throat chamber...



Edited by Amano - 27 November 2008 at 6:47pm
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wafflesomd View Drop Down
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Points: 811 		Post Options Post Options   Thanks (0) Thanks(0)   Quote wafflesomd Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2008 at 6:47pm
Doesn't look like the lower driver would come out after its put in.
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Amano View Drop Down
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Points: 219 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Amano Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2008 at 6:57pm
In december i'll try to build this one....  and i'll compare it with WSX, dual WSX at same power lever... Tongue
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tommysb View Drop Down
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What happens to the excursion at higher powers?
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Amano View Drop Down
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Points: 219 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Amano Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2008 at 7:18pm
At power level of 650Watt per driver excursion at 40Hz is +-6,2mm, at 62hz is +-6,8mm..

It's possible to change the driver.... putting RCF LF18N401 Wink
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MarjanM View Drop Down
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Points: 7816 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2008 at 7:50pm
Originally posted by Amano Amano wrote:

I think, it can be a good change of LABs... Much lower bass...

It looks like dual inverted scoops whith a small throat chamber...



This box can not go as low as a lab sub. It is short for about 1,2m of horn length.
Marjan Milosevic
MM-Acoustics
www.mm-acoustics.com
https://www.facebook.com/pages/MM-Acoustics/608901282527713
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Amano View Drop Down
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Points: 219 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Amano Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2008 at 7:56pm
~2.1 meters! ...
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Deadbeat View Drop Down
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Points: 3167 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Deadbeat Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2008 at 7:59pm
Lab? You will have to beat this in 2pi Wink.

And they're using 2xLAB12s.


Your horn is a nice design. However, keep this in mind: Stacking the horns side by side so a tunnel is formed with the open back may change quite a bit in terms of acoustic impedance on the other side of the cone, and delay of the 'back wave' by differing amounts.

Now, what settings are you using for combined response?
Away on extended leave.
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tommysb View Drop Down
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What software is that Deadbeat?

Tom
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TDA-Audio View Drop Down
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Points: 294 		Post Options Post Options   Thanks (0) Thanks(0)   Quote TDA-Audio Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2008 at 9:36pm

based old project

http://www.speakerplans.com/forum/forum_posts.asp?TID=8740
horns plans http://photofile.ru/users/tda-audio/
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