Thanks to Don Snyder & Chris.
Split off from this long post,
http://www.diyaudio.com/forums/showthread.php?postid=1819879#post1819879
- 2-sheets of 3/4" 15-ply ApplePly used.
- The blue CAT5 will be used to power some RGB LEDs to illuminate the 1/2" Green-Edge CNC Carving / access panel.
- Coil will be installed later
Here are my current build pictures:
Old Canon 10D, 28-135mm USM-IS, ISO100, F16, 1/80sec.
Some CNC V-Bit Carving Action:
Setup took about an hour
Split off from this long post,
http://www.diyaudio.com/forums/showthread.php?postid=1819879#post1819879
- 2-sheets of 3/4" 15-ply ApplePly used.
- The blue CAT5 will be used to power some RGB LEDs to illuminate the 1/2" Green-Edge CNC Carving / access panel.
- Coil will be installed later
Here are my current build pictures:
Old Canon 10D, 28-135mm USM-IS, ISO100, F16, 1/80sec.
Some CNC V-Bit Carving Action:
Setup took about an hour
Wow, love the pictures and the build quality, very nice!! Although this is build very rugged, you might consider some bracings at large areas, Since I´m in Pro-Sound, I use similar plywood as you do and I´ve always had to add some bracings and it always improved the sound (and made rumble from the enclosure walls less).
Really nice work and great pics! I like that the driver is visible. My tapped horn is very similar in layout to yours and I get slick of putting on the hearing protection and sticking on my head in the mouth with a flashlight to monitor driver excursion.
I added a ton of bracing to mine, here's a pic if you're looking for some inspiration.
http://www.diyaudio.com/forums/attachment.php?s=&postid=1625614&stamp=1223240677
BTW how to you intend to finish it - i.e. paint, stain etc.
I added a ton of bracing to mine, here's a pic if you're looking for some inspiration.
http://www.diyaudio.com/forums/attachment.php?s=&postid=1625614&stamp=1223240677
BTW how to you intend to finish it - i.e. paint, stain etc.
Thanks for your comments Don.
Jogi59, can you please put up the URL for that picture.
I get a blurb saying " No hotlinking allowed !"
It says " use the first link after the completed upload ". I guess you know what to do .
Maybe this is an opportunity to sort out the differences between the two implementations. I'm sure each has its own merits and demerits. However the conclusions will help in choosing the solution for others who have not made the comparisons themselves.
Cheers.
Jogi59, can you please put up the URL for that picture.
I get a blurb saying " No hotlinking allowed !"
It says " use the first link after the completed upload ". I guess you know what to do .
Maybe this is an opportunity to sort out the differences between the two implementations. I'm sure each has its own merits and demerits. However the conclusions will help in choosing the solution for others who have not made the comparisons themselves.
Cheers.
Post #13
Post #13
Hi joqi59:
Very interesting data. That has to be one big anechoic chamber to reach down to 20/30Hz.
Looking at the left hand graph (1W/1m?), I doubt that this is a well designed tapped horn. It would be nice to get more data on the build.
Do you have any more information pertaining to the tests, e.g.: which woofer was used, enclosure's layout, drive power?
Regards,
Post #13
Hi joqi59:
Very interesting data. That has to be one big anechoic chamber to reach down to 20/30Hz.
Looking at the left hand graph (1W/1m?), I doubt that this is a well designed tapped horn. It would be nice to get more data on the build.
Do you have any more information pertaining to the tests, e.g.: which woofer was used, enclosure's layout, drive power?
Regards,
I think a size distinction needs to be made here. If you are willing to live with a 300 L box, then maybe a ported enclosure is fine for some people. However, the main advantage to the tapped horn is its ability to play low, clean, and loud in enclosures smaller than what is needed for a ported box. Regardless the sizes, the tapped horn is more musical because it has a broader tuned bandpass than a ported enclosure. I've never heard a ported enclosure play anything but one note bass. That's what happens when you only have a tuned port to work with.
Re: Post #13
Don´t forget, that the measurement was done in an anechoic chamber=fullspace=4.0xpi in hornresponse.
To compare it with hornresponse simulations, add 12dB (1.0xpi) or 18dB (0.5xpi)
http://www.visaton.de/vb/showthread.php?t=18417
Simulation is in post 28
Enclosure in post 40
Used driver
TIW 300
.tb46 said:
An externally hosted image should be here but it was not working when we last tested it.
tb46 said:
Don´t forget, that the measurement was done in an anechoic chamber=fullspace=4.0xpi in hornresponse.
To compare it with hornresponse simulations, add 12dB (1.0xpi) or 18dB (0.5xpi)
The original thread is heretb46 said:
http://www.visaton.de/vb/showthread.php?t=18417
Simulation is in post 28
Enclosure in post 40
Used driver
TIW 300
Those pictures look very familiar...
I did some corner braces (piece of wood 2''x2''x12'' on each of the inside fold corners. I also filled in that gap with expanding spray foam after it was completed. That space would be perfect though, for putting in a resonator or two, once you had figured out the correct length/tuning/etc.
I am thinking of having mine in a corner firing into the room through an opening in the door, and I would need to put on a small mouth extension to the horn. I am wondering if this would lower the tuning much.
I did some corner braces (piece of wood 2''x2''x12'' on each of the inside fold corners. I also filled in that gap with expanding spray foam after it was completed. That space would be perfect though, for putting in a resonator or two, once you had figured out the correct length/tuning/etc.
I am thinking of having mine in a corner firing into the room through an opening in the door, and I would need to put on a small mouth extension to the horn. I am wondering if this would lower the tuning much.
