We got a winner!
Now i just have to finish my tube amp, and then i can start building horns.
Thanks to you all 🙂.
Now i just have to finish my tube amp, and then i can start building horns.
Thanks to you all 🙂.
This 145Hz Tractrix belong to my friend Fuling.
Now...that's.....BIG!
Gonna stop a lil bit higher. Maybe 200hz. So they can fit thru the door 🙂).
The winner is monacor....KU-516.
How wide are the doors in your country😉?
The 145Hz horn isn´t as wide as it looks, only 67*67cm.
A 135Hz is 72*72cm.
The 145Hz horn isn´t as wide as it looks, only 67*67cm.
A 135Hz is 72*72cm.
A few weeks past since i started this thread and i now have an mould for round tractrix horns(62 cm diameter). I will build paper horns on them (Inlow style).
What do you guys suggest to use below the horn?( something cheap....horn loaded maybe).
Edit: I want to find a solution to make the horn usable beyond without any degradation of the sound. 250-4000 would be nicer. i was thinking about something like a phase plug (from the throat to the mouth)
What do you guys suggest to use below the horn?( something cheap....horn loaded maybe).
Edit: I want to find a solution to make the horn usable beyond without any degradation of the sound. 250-4000 would be nicer. i was thinking about something like a phase plug (from the throat to the mouth)
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no no no... not that phase plug. something that extends from the throat to the mouth. I'll do a drawing when i won't be sooooo tired.
Forget it! You shouldn´t compress even more as it will sound bad. Accept the shortcomings of the driver and build a 600-800Hz horn to be used above 1200Hz. For example a Traxtrix will not be more than 18cm diameter for 600Hz.
Hi,
I have just received some Ajuha drivers. "Same" as Monacor KU 516, Adastra, Some P.Audio's etc. etc. This driver is not an 25.4 mm exit driver....there is a ring to keep the bugscreen in place. The inside of the ring is 19 mm outside 25.4 mm right beneath this ring the diameter of the driver exit is 19 mm. I am amazed you only read about the absolute must to remove the bugscreen in almost every review, but no one seems to have noticed this driver has a 19mm throat exit...
I got mine for 14 euro (no big loss if i screw them up). So probably will machine the throat up to 25mm. If i have more detailed info about the rest of the innerworks of this driver. I thought it was quite an important point this 19mm throat....Every standard srew on horn with TPI thread will be a major misfit / no wonder the measured performance is a bit bumpy...
I have just received some Ajuha drivers. "Same" as Monacor KU 516, Adastra, Some P.Audio's etc. etc. This driver is not an 25.4 mm exit driver....there is a ring to keep the bugscreen in place. The inside of the ring is 19 mm outside 25.4 mm right beneath this ring the diameter of the driver exit is 19 mm. I am amazed you only read about the absolute must to remove the bugscreen in almost every review, but no one seems to have noticed this driver has a 19mm throat exit...
An externally hosted image should be here but it was not working when we last tested it.
I got mine for 14 euro (no big loss if i screw them up). So probably will machine the throat up to 25mm. If i have more detailed info about the rest of the innerworks of this driver. I thought it was quite an important point this 19mm throat....Every standard srew on horn with TPI thread will be a major misfit / no wonder the measured performance is a bit bumpy...
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Many PA re-entrant horns (like the driver is designed to be used with) have throats of 19 mm, or even 5/8th inch.
The lack of a phase plug certainly has something to do with the "bumpy response", elimination of the bugscreen or matching the throat to a horn throat won't correct that.
The lack of a phase plug does provide an acoustic band pass filter which reduces upper harmonics, a good thing for the driver's design bandwidth, which would hardly be affected by the bugscreen.
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So this sudden change from 2,84 cm2 to 5,06 cm2 throat area does not effect the performance at all? I understand about volume (frontchamber) instead of phaseplug and it's effect on bandwidth.
So no need to make a 19 mm throat horn for this driver? There's quite some talk on Diyaudio about precisely matching driver and throath i am a bit confused, this mismatch would not have an effect on performance? Since we don't want to use it anyway above 3 kHz?
So no need to make a 19 mm throat horn for this driver? There's quite some talk on Diyaudio about precisely matching driver and throath i am a bit confused, this mismatch would not have an effect on performance? Since we don't want to use it anyway above 3 kHz?
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To put it in perspective, the lack of a phase plug will cause large peaks and dips in response above 3kHz (or so), a mismatch in driver and throat (which I agree should be matched) will cause minor peaks and dips higher up, presumably out of the pass band this driver would normally be used for.
Thanks Art!
The choice would be mismatch of throath or longer horn. The longer horn (19 mm instead of 25.4 mm throath) will limit usable bandwith a bit.
About this Ajuha (that's the source, so will name them by their original birhtname), i do like the buildquality compared to price. You get a lot of driver weight for the buck. x-max looks alright, estimate: 5mm voicecoil, 2 mm airgap. Just a bit disapointed the 1-3/8"-18 TPI horn i bought will be a mismatch...
The choice would be mismatch of throath or longer horn. The longer horn (19 mm instead of 25.4 mm throath) will limit usable bandwith a bit.
About this Ajuha (that's the source, so will name them by their original birhtname), i do like the buildquality compared to price. You get a lot of driver weight for the buck. x-max looks alright, estimate: 5mm voicecoil, 2 mm airgap. Just a bit disapointed the 1-3/8"-18 TPI horn i bought will be a mismatch...
Horn only need to make a 2" to the 1-3/8" adapter to fit. You can buy a cheep round 1-3/8" horn cut it of at 2" and mount it to the 2" horn.
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