Yep, my fault.
>=100db (initially will keep Omega Pro18 Open baffle, so we can define a better woofer but wont be used yet...)
2 ways (and will add a jbl2405 later if needed).
Dimmension arround 150cm tall, 50cm deep, 50cm width. Deep is hard to change. but a nice looking horn that is a bit bigger would be ok.
Power available for mid-highs 0.7W or 2W
Power available for woofer 10W or 20W
Maximun cost: let's say a 1000 USD... but as you see, I am thinking on a progressive build so we could focus on mid-highs horn.
Best,
Basreflex Eminence kappapro 15A 160,-
99-100dB 1wmtr
Eminence Kappa Pro-15A 15" Cast Frame Driver 290-422
Speaker Detail | Eminence Speaker
Here simulation compared to the 18sound 15mb606 about exact the same drivers for what data is concerned. The eminence will have a better price performance.
So how about this woofer Charley 140liter =120liter with stuffing. Box inside about 40cm X 45cm X 70cm.
$160,- piece. 40Hz -3dB!
$340,- left for horn and HF driver.
There are not to many real 100dB woofers most have a 100db peak at 1kHz and are sold as 100dB woofers.
Note: rear-port gain ads to the direct radiating cone response.
99-100dB 1wmtr
Eminence Kappa Pro-15A 15" Cast Frame Driver 290-422
Speaker Detail | Eminence Speaker
Here simulation compared to the 18sound 15mb606 about exact the same drivers for what data is concerned. The eminence will have a better price performance.
So how about this woofer Charley 140liter =120liter with stuffing. Box inside about 40cm X 45cm X 70cm.
$160,- piece. 40Hz -3dB!
$340,- left for horn and HF driver.
There are not to many real 100dB woofers most have a 100db peak at 1kHz and are sold as 100dB woofers.
Note: rear-port gain ads to the direct radiating cone response.
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I am sorry Helmuth, I believe part is my fault, for not writing my ideas more clearly.
Let's focus on the mids with a Max. budget of 1000 usd for "drivers".
Since I am willing to build the horns if necesary. I think I can build an Iwata horn or a Tad wooden horn with my tools and skills.
So we should look for something that works from 400hz? to >15khz
I emailed Autotech, in Poland, their shipping company only can send their horns to Chile to a bussines (not to an individual person). Probably I could get a friend's bussiness to do so, but because of big size and shipping costs, I am feeling more tempted about building an Wooden Iwata like the TADs.
What about trying a 1.4'' coaxial compression driver like the BMS on a horn mated to a good 15'' or two? Super high sens for sure
Like Dave advised I think BMS is the best way to go low with a HF driver BMS allows very low crossing of thier drivers.
It are coaxial horn drivers with crossover.
Compression Drivers
Look here see this coaxial 1,4" driver. 300-22000Hz
Curves
And a more modern horn approach for mid high is the synergy horn. A coaxial conical-horn.
topic on this horn very good dispersion. And not exspensive. < $200,- all the drivers and mdf.
http://www.diyaudio.com/forums/multi-way/200539-diy-synergy-horn.html
Red Spade Audio: Synergy horn flat pack kit
topic on this horn very good dispersion. And not exspensive. < $200,- all the drivers and mdf.
http://www.diyaudio.com/forums/multi-way/200539-diy-synergy-horn.html
Red Spade Audio: Synergy horn flat pack kit
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The hole Redspade explanation of the synergy horn
DIY Synergy horn - intro Red Spade Audio: DIY Synergy horn
Synergy horn concept Red Spade Audio: Synergy horn
S1 Build pics Red Spade Audio: Synergy horn - update
S2 intro Red Spade Audio: Synergy prototype #2
S2 Build pics Red Spade Audio: Synergy prototype #2 - construction
Hornresp lessons Red Spade Audio: Synergy horn - hornresp lessons
Sims vs measurements Red Spade Audio: Synergy horn - simulations vs measurements
Directivity measurements Red Spade Audio: Synergy horn measurements
S3 intro Red Spade Audio: Coming soon: S3 - my next Synergy horn
Phase plugs Red Spade Audio: Synergy mid driver mounting and phase plugs
DIY Synergy horn - intro Red Spade Audio: DIY Synergy horn
Synergy horn concept Red Spade Audio: Synergy horn
S1 Build pics Red Spade Audio: Synergy horn - update
S2 intro Red Spade Audio: Synergy prototype #2
S2 Build pics Red Spade Audio: Synergy prototype #2 - construction
Hornresp lessons Red Spade Audio: Synergy horn - hornresp lessons
Sims vs measurements Red Spade Audio: Synergy horn - simulations vs measurements
Directivity measurements Red Spade Audio: Synergy horn measurements
S3 intro Red Spade Audio: Coming soon: S3 - my next Synergy horn
Phase plugs Red Spade Audio: Synergy mid driver mounting and phase plugs
The mids need to be modeled as offset drivers, your schematic isn't showing that.......
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those Redspade links are quite interesting
about the special BMS coax compression drivers
do I see a tendency that the two coax drivers have difficulty 'reaching' each other
seems a weird ?
but knowing that most small tweeter horns are no good below 7khz, and using big mid that goes down to 300hz, maybe not a big surprice
Could a simpler way to some great high sens creation be to just mount one BMS compression coax on a suitable horn per side, add two sq regarded 15"s per side, dial it all in actively and enjoy?.. The power amp he is using is very low watt so you could cross low, and this would be a super high sens system, with less guesswork and complication of the Synergy.. By the way I posted the idea of using the BMS coax earlier after looking at Danleys Jericho Horns. The J1 94 (JH 90), pretty awesome!
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The coax only looks good down to 4-500, whereas a Synergy is good to 2-300 depending on the size of the horn. Directivity I think would be better in the hf on the Synergy as well.
That........and those coax drivers ain't cheap! You could do 2 Synergy horns (drivers and material) for the price of one coax or less.......
Hello Nate, it is my impression that the curves for the BMS coax are measured on a 700hz horn. I use the BMS on larger horns, and have no problems down to 300hz.
nice short horn with low cutoff frequency.
An externally hosted image should be here but it was not working when we last tested it.
I like the symmetry of a round horn, and it is much smaller then a itawa with same cutoff.
Tractrix makes the smallest horn if you look at lowest cut off. With a 2" driver is this horn only 10" long. Metal mounting ring.
With this horn driver when you have the money better then coax so smooth.
http://www.eighteensound.com/index.aspx?mainMenu=view_product_simple&pid=252
An externally hosted image should be here but it was not working when we last tested it.
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