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Bull-Nosed Horn Project

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_djk_ View Drop Down
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    Posted: 03 October 2014 at 9:39am
Hi-Fi
 
 
 BMS Co-Ax, PPSL with four 8's, vented to 35hz with a Q=2 filter at 35hz.


Edited by _djk_ - 03 October 2014 at 9:42am
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odc04r View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote odc04r Quote  Post ReplyReply Direct Link To This Post Posted: 03 October 2014 at 10:59am
Look's interesting, tidy woodwork on the horn. Very different.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote burningbush Quote  Post ReplyReply Direct Link To This Post Posted: 03 October 2014 at 11:01am
Oh yesss!
Now we are talking.  Looks great, how are the 4x8" loaded?
music is the message
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Post Options Post Options   Thanks (0) Thanks(0)   Quote burningbush Quote  Post ReplyReply Direct Link To This Post Posted: 03 October 2014 at 11:02am
The eliptical hf waveguide must have taken a while, how do you do that on a lathe?
music is the message
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studio45 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote studio45 Quote  Post ReplyReply Direct Link To This Post Posted: 03 October 2014 at 1:15pm
There are more photos on the Photobucket page, Looks like the 8's go inside the curved part of the bass horn on a sub-assembly. Looks great, bet it sounds great too :)
Studio45 - Repairs & Building Commotion Soundsystem -Mobile PA
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_djk_ View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 03 October 2014 at 11:26pm
"how do you do that on a lathe?"
 
The ellipses are done on a CNC, glued up with dowel pins, and then the CNC steps are roughed out with a round file, and finish sanded with sandpaper glued to a dowl stick. It is time consuming.
 
"Looks great, bet it sounds great too :) "
 
The grille on the HF will wrap around, on the LF it will go back in a deep 'V'.
 
It has so much less distortion than a single 15 that it's not funny. It sounds like it goes lower, although it doesn't measure any different in the bottom octave (as far as amplitude goes).
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Timebomb Quote  Post ReplyReply Direct Link To This Post Posted: 04 October 2014 at 12:06am
Looks great DJK!  Really like the extra thick laminateed curve, bet thats solid as a rock.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bee Quote  Post ReplyReply Direct Link To This Post Posted: 04 October 2014 at 12:23am
very nice job on the curved panel...
https://www.elements-audio.com
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_djk_ View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 04 November 2014 at 9:06am
Nasty phone photo (with grills):
 
 
They look and sound great!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote R Mogale Quote  Post ReplyReply Direct Link To This Post Posted: 04 November 2014 at 11:11am
Is this you work Dennis.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote MattStolton Quote  Post ReplyReply Direct Link To This Post Posted: 04 November 2014 at 1:00pm
I thought that the great and the good had a problem with the BMS co-ax drivers - 3rd order harmonics or summit'.

How can you do a super low distortion bass (PPSL), and then use a super high distortion BMS annular ring co-ax driver?

Wink
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Post Options Post Options   Thanks (0) Thanks(0)   Quote imageoven Quote  Post ReplyReply Direct Link To This Post Posted: 04 November 2014 at 1:09pm
Originally posted by _djk_ _djk_ wrote:

Nasty phone photo (with grills):
 
 
They look and sound great!


Very nice.

Better than the usual car audio!
Keep pushing on, things are gonna get better.
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