|21st July 2009, 11:37 PM||#623|
Join Date: Aug 2008
Well tb46 hasn't contacted me yet.
If anyone is on a thread of with please inform him. OR if anyone wants to draw that up (see above post) I will build one.
I should be finishing up
my test box for my new dual 12 TH tonight. Only thing left is the speaker baffles. It is BIG. 171.5 cm x 40" x 15". just at 400 Lt internally. As long as this one comes close to the HR data I will be happy.
you going to put up a PDF of your design?
|23rd July 2009, 09:03 AM||#626|
Join Date: Aug 2008
The other day I realized I had set my Message Filter incorrectly for that email address. I had created a "Name Spoof" filter but instead of it checking to see if BOTH TO and FROM were the same I had it set to "IF ANY MATCH". Which means it was deleting EVERY email sent to me at that address since July 4th!
I was going to say if you can draw your dual 12 up or make it Sketchup. I will build one! I like the outcome.
I am currently working on my own
Utilizing a Lab 12 Gen 2 driver. I want something that is less than 400 Lt. >$300 to build and goes down to 30 Hz. At above 135 DB. Preferably 140 plus at 38 Hz -150 Hz. Which is about where I stand right now. Though layout issues still abound.
|23rd July 2009, 09:17 AM||#627|
Join Date: May 2001
Location: Bangalore, India
FlipC, have you posted a layout sketch of your LAB 12 II TH and did I miss it somehow? If yes or you are going to post it after testing your build prototype, I would be definitely interested. I already have 2 of these drivers idling for the past couple of years.
|23rd July 2009, 10:55 AM||#628|
Join Date: Mar 2006
My email got bounced back this time.
This is what it said...
Ohh Here is my original Email relating to a question I asked in the Tapped
I've been wondering if my tapped horn layout I posted on the Pro Audio
Tapped horn Forum .
I'm not sure if you weren't comfortable answering in a public forum??
Would love to know if I'm close to what you came up with for internal
I have been tempted to buy some MDF and build one up.
I just read your post about trying a TH design using the LAB12 Gen 2.
From most of the modeling I've seen with the LAB12 it has lead me to believe
that the LAB12 is not the best candidate for a TH unless it is designed to
go to 16Hz or bellow. It seemed to have serious XMAX issues in a horn of
smaller size. Though I wouldn't rule it out. It would seem better suited
in a TH that is larger and goes lower than the DTS-20.
I could be wrong though I haven't messed modeling a LAB12 in the newer
versions of Hornresp. But I did mess with AKABAK before the TH-feature was
Anyhow would like to know what you come up with.
I didn't look to close the HornRESP numbers for the Dual 12PS100 TH.
Is that supposed to be like a dual TH-Mini? Or is it something else?
I've been thinking about doing some TH-designs with Micro Drivers.
Haven't found quite the right driver yet, but Tang band looks
|24th July 2009, 03:26 AM||#629|
Join Date: Aug 2008
sumsound I am unsure why it bounced.
the address exist. Did you receive the one I sent to you?
I thought I posted the HR data for the dual 12 on here.
But not a layout pic. If you or anyone wants to give it a go just take the driver and see how much SPL you can get out of up to 400 Lt box. Down to 35 hz.
All I have done so far is a simple "M" shape.
See pic below. The length is correct but at the cost of an overall external size of 669 Lt. because I wanted to make the test box easy to build. The drivers simply sit on the left and right side with
the cone facing into the path. I built this box to be able to do another test of HR response chart and also the phenomena that the low end valleys get filled in a TH. Both my Mini Clones and Screamers Furybox has attested to this fact. Danley mentioned in on the original TH thread or such also. And yes - when i get a final design done I will post it.
As far as the Lab 12 goes.
It is a relatively cheap driver. I can get 2 for the a few more $ than the B&C or like drivers. Also since this isn't Hi-Fi I am not worried nor do I want a flat curve. I expect the dips to get filled. I just wanted massive SPL down. Doesnt have to be the Lab 12 IF you can find another driver to do the job of 140+ Db 38-150 Hz at 400 lt or less. keep the box under $300 US to boot! This can be done with the Lab 12. (4 dual 12 boxes)
No your layout is different than mine. Mine has a longer path. I just went and got my drawings. I will start work on a Sketchup model of it as other have asked for it as well. I will let you know when i get that done but it shouldn't take me to long.
tb46's dual 12 is just a dual 12 in regards to my post about wanting MORE. I am a bass addict. His response chart is rather nice.
There are ALLOT of designs for micro drivers.
Look at the TH for cars thread and the original TH thread. I myself do plan to build a TH Spud some day soon. I just have to get the rest of the system first. (IE I do not have a Home Theater setup)
|24th July 2009, 05:08 AM||#630|
Join Date: Jan 2006
I just took another look at the old Dual 12 inch (Post #622), and I'm not happy with the impulse response. I'll try to improve that area. With any luck I'll get a drawing done over the weekend.
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