Enclosures for my TD15Ms Build thread (aka build this years AKfest MDF monstrosity)
- Thread starter dnewma04
- Start date
Brett
Active Member
Thanks for that, it helped a bit. Mine look to be a little smaller in all dimensions from yours, but not much except for depth. Cheers.
Great work, Dave. I love / hate mdf. Cuts like butter and leaves talcum powder dust everywhere for years to come. I think the only way to clean my work area at this point is with a leaf blower like Bill Murray in Caddyshack. I thought that was ridiculous at the time. Now I'm not so sure.....
Markus
Uhhhh, I just did that Friday......:yes:
Dave, those look like they'll be astounding, but one silly question time.....
That's a lot of work, are you certain on the box size??? The reason I ask, is that when I built mine, in a much simpler standard box, I made a mock-up test box out of mdf that I could tune by moving the rear panel in and out. The mdf is cheap enough that I decided to use a throwaway box, ( well, I gave it to Keg
) before I would commit to the volume I wanted. The easier design was to make it deeper than needed and then you could slide the rear panel in and out to see how different volumes actually sounded, and actually tune it through a range of sizes for the most pleasing sound. True, there would be resonance and reflection issues from the lesser, unbraced box, but it would give you a real world feeling for the "best" size.
Just saying... :yes:
Brett
Active Member
Why would you do this? Modelling programs such as Unibox have always given very accurate measured results for me so I'm not seeing the need for a variable enclosure size for a given driver. Port tubes can be friction fitted or temporarily held in place with Blutak and Z measurements run to tune them exactly upon completion of the enclosure very easily.That's a lot of work, are you certain on the box size??? The reason I ask, is that when I built mine, in a much simpler standard box, I made a mock-up test box out of mdf that I could tune by moving the rear panel in and out. The mdf is cheap enough that I decided to use a throwaway box, ( well, I gave it to Keg
The easier design was to make it deeper than needed and then you could slide the rear panel in and out to see how different volumes actually sounded, and actually tune it through a range of sizes for the most pleasing sound. True, there would be resonance and reflection issues from the lesser, unbraced box, but it would give you a real world feeling for the "best" size.
Just saying... :yes:
Kegger
R.I.P. 1/12/1966 - 6/1/2017
Brett Andy wasn't necessarily coming from a technical side of the situation but from
the subjective side, meaning that different sized boxes and tuned to many different
frequencies can and will change the entire tone of the driver, so Andy was trying a
few different things to see if one configuration turned out to be more pleasing then
another might have been. (while at the same time using box modeling software)
Myself yah get the box the size I see fit depending on the specs an tune from there.
(Andy was just going a bit beyond an seeing if anything was a "sound" improvement)
the subjective side, meaning that different sized boxes and tuned to many different
frequencies can and will change the entire tone of the driver, so Andy was trying a
few different things to see if one configuration turned out to be more pleasing then
another might have been. (while at the same time using box modeling software)
Myself yah get the box the size I see fit depending on the specs an tune from there.
(Andy was just going a bit beyond an seeing if anything was a "sound" improvement)
OK, I know when I built mine, I just wanted to make sure before I committed to building.
I didn't want to get one built only to find out that it was lacking and perhaps I should have gone a few inches bigger.
Like most other stuff here, there probably isn't all that much difference between 4.9 and 5.1 ft3, but it's nice to get a prototype test before building.
I guess it's the old carpenter's adage, measure twice and cut once :yes:
I didn't want to get one built only to find out that it was lacking and perhaps I should have gone a few inches bigger.
Like most other stuff here, there probably isn't all that much difference between 4.9 and 5.1 ft3, but it's nice to get a prototype test before building.
I guess it's the old carpenter's adage, measure twice and cut once :yes:
Sometimes it can be hard to reconcile what you see on a graph with what you're going to hear. Some people can look at the graphs and know what the speaker will sound like. I've done enough speaker builds that I can generally do that. I'm sure Dave has too so it's not an issue for him. But unless you've built a gazillion boxes or you just have an inherent gift for visual-to-aural translation it can be educational and reassuring to build a test box so you can be sure that things sound the way you want them to.
Dave, I have a feeling you're going to kick Big Bob to the curb. That 2nd room is sounding more appetizing.
skywave-rider
Slumming in Akihabara
Dave,
Hope this is on topic, getting up to speed on the Unity Horn concept,
http://www.soundimage.dk/Different-col/Comments.htm#Unity%20and%20Renkus%20Heinz
and wonder if you built those or purchased them. And what the drivers are.
I was aware of the commercial Yorkville use of the concept.
Yours in black and trim will look fantastic.
Hope this is on topic, getting up to speed on the Unity Horn concept,
http://www.soundimage.dk/Different-col/Comments.htm#Unity%20and%20Renkus%20Heinz
and wonder if you built those or purchased them. And what the drivers are.
I was aware of the commercial Yorkville use of the concept.
Yours in black and trim will look fantastic.
Brett
Active Member
I'd missed that. I'll add it to the 'Danley' file I've been compiling for a decade.
The mids are a semi custom version of a Misco driver, and the HF was either a B&C DE25 (as in mine) or the TAD 2001 at least in the Lambda version of the Unity.
Crap pics of my mids.
Brett
Active Member
I bought mine from Nick with the flares and the mids, but I needed to get some 16R phrams to fit the final xover design.
When I do the flare termination tests, I'm also going to try the DE250's and see how close they are.