Is it possible to make a inwall line source dome tweeter array in a long waveguide?
F ex with Seas 27TDFC which have low fs.
Norwegian living rooms are 240 cm high and with 16 tweeters the line could be around 180 cm. C/C will be 112 mm and crossover maybe 1000-1200 Hz due to the waveguide and the number of drivers?
https://www.seas.no/index.php?optio...fc&catid=45:seas-prestige-tweeters&Itemid=462
F ex with Seas 27TDFC which have low fs.
Norwegian living rooms are 240 cm high and with 16 tweeters the line could be around 180 cm. C/C will be 112 mm and crossover maybe 1000-1200 Hz due to the waveguide and the number of drivers?
https://www.seas.no/index.php?optio...fc&catid=45:seas-prestige-tweeters&Itemid=462
What about a line with Seas DXT?
https://www.seas.no/index.php?optio...=99:h1499-06-27tbcdgb-dxt&catid=45&Itemid=239
https://www.seas.no/index.php?optio...=99:h1499-06-27tbcdgb-dxt&catid=45&Itemid=239
Using a tweeter with an existing waveguide is going to dictate the start of your overall waveguide. If you design that first, you might change your mind. One would assume you'll start that waveguide at 25mm in width... Have you also thought about the vertical source spacing?
If i f ex use seas dxt with 11 cm c/c, one wavelenght will be at 2700 Hz.
If i look at Lyngdorfs inwall line source it seems that the tweeter c/c is around 7 cm and the crossover is 1800 Hz.
With DXT it could be some more loobing issues?
If i look at Lyngdorfs inwall line source it seems that the tweeter c/c is around 7 cm and the crossover is 1800 Hz.
With DXT it could be some more loobing issues?
I understand that DXT isnt optimal for this.
I have 16 pcs of this tweeter and 8 pcs mid/fullrange already and will make two 45 cm mockup sections to test the timbre in the drivers and polar response.
I have 16 pcs of this tweeter and 8 pcs mid/fullrange already and will make two 45 cm mockup sections to test the timbre in the drivers and polar response.
Seeing the price of the Seas tweeter and the size of their faceplate and that you don't have enough on hand for the full project. I would advise something like the Peerless/Tymphany OC-25. Its a pain to mount because it doesn't have a faceplate but for the same reason can be spaced much tighter than the Seas device, which is what is really needed.
You should also look at the DMA45 1.5" full range driver, which is half the cost of the OC-25, which is about 1/4th cost of the SEAS, and will do almost as well, especially since you are toeing the tweeters in, presumably to aim at your MLP.
Regardless of what tweeter you eventually use and how many, some form of shading will be desirable to widen the vertical response window, unless you are content with seated only listening. This can be evaluated in a Vituix simulation using diffraction tool generated directivity based on piston diameter.
You should also look at the DMA45 1.5" full range driver, which is half the cost of the OC-25, which is about 1/4th cost of the SEAS, and will do almost as well, especially since you are toeing the tweeters in, presumably to aim at your MLP.
Regardless of what tweeter you eventually use and how many, some form of shading will be desirable to widen the vertical response window, unless you are content with seated only listening. This can be evaluated in a Vituix simulation using diffraction tool generated directivity based on piston diameter.
You want small inexpensive tweeters with minimal face plate for the project. Forger normal tweeters. I used this one before, it sounds great.
https://www.parts-express.com/Dayto...Mount-3-4-Soft-Dome-Neodymium-Tweeter-275-035
https://www.parts-express.com/Dayto...Mount-3-4-Soft-Dome-Neodymium-Tweeter-275-035
With 32 such Dayton tweeters with fs at 2100 hz. Is it possible to push them as low as 1600 Hz?
(With active crossover/dsp)
(With active crossover/dsp)
I think i stick with Seas. I know them and live in the neighbourhood 👍
And i have already a small stock here of the small neodymium soft domes with fs around 1100 Hz. Then f ex 1800 Hz like Lyngdorf use in their line source could be a good start?
Its 53 mm in diameter.
https://www.seas.no/index.php?optio...cg&catid=45:seas-prestige-tweeters&Itemid=462
And i have already a small stock here of the small neodymium soft domes with fs around 1100 Hz. Then f ex 1800 Hz like Lyngdorf use in their line source could be a good start?
Its 53 mm in diameter.
https://www.seas.no/index.php?optio...cg&catid=45:seas-prestige-tweeters&Itemid=462
JBL CBT1000 has something that you might use for inspiration.
https://jblpro.com/en-US/products/cbt-1000
https://jblpro.com/en-US/products/cbt-1000
Have you seen this by member FoLLgoTT?
https://www.diyaudio.com/community/...totype-with-waveguide-and-cbt-shading.266417/
And more important, it's output both horizontally and vertically, just look in the thread.
https://www.diyaudio.com/community/...totype-with-waveguide-and-cbt-shading.266417/
And more important, it's output both horizontally and vertically, just look in the thread.