I've had a couple of these Eton 7-360 Hex drivers for a while. I was doing some reading online while I was trying to come up with a proper cabinet.
I've got them in a 2 way with a Seas 25TAF/G.
Now, here's the part where I think I might be losing my mind.
From the looks of the response of the Eton (unfortunately, I don't have any proper measuring equipment) it rolls itself off pretty sharply starting around 4500hz or so and I thought to myself...I wonder what the drawbacks would be to running the midbass unit naked and crossoverless and using a simple 6db slope on the tweeter in various places until it sounded like it was mating up properly, essentially ending up with a crossover that consisted of 1 capacitor.
Has anyone ever done anything like this with one of these woofers?
I've got them in a 2 way with a Seas 25TAF/G.
Now, here's the part where I think I might be losing my mind.
From the looks of the response of the Eton (unfortunately, I don't have any proper measuring equipment) it rolls itself off pretty sharply starting around 4500hz or so and I thought to myself...I wonder what the drawbacks would be to running the midbass unit naked and crossoverless and using a simple 6db slope on the tweeter in various places until it sounded like it was mating up properly, essentially ending up with a crossover that consisted of 1 capacitor.
Has anyone ever done anything like this with one of these woofers?
Scratch that, 2 parts. Had to put a resistor on the tweeter, it's a little happier than the woofer is. 4.7uF and 2ohms (so far).
I have the FRD/ZMA file of the Eton 360 but it seems to be in a box.
For the 25TAF H0398, a little old this tweeter, but the K27G, soft dome should work in the simulation ?
You have an horrible peak near 4500Hz with the eton, you need a notch to suppress it.
File attached. You can use speaker workshop or pcd.
Have fun !
For the 25TAF H0398, a little old this tweeter, but the K27G, soft dome should work in the simulation ?
You have an horrible peak near 4500Hz with the eton, you need a notch to suppress it.
File attached. You can use speaker workshop or pcd.
Have fun !
Thank you sir 🙂
It actually sounds surprisingly good right now, I've been listening to it for about an hour. I can tell that there are a couple of peaks, so I might play with it, but i like the idea of "lol, what crossover?"
😉
What crossover ?
I played with the data, you can do a crossover very closed to the latest HiVi-ViFa.
😉
I played with the data, you can do a crossover very closed to the latest HiVi-ViFa.
😉
Which I still haven't ordered the parts for yet 🙁 It's on my shopping list next time I've got some spare cash though 🙂
One thing is for certain, I like this midbass unit a lot more than the HiVi m6a in my other set. You say the crossover would be very close to the one you helped me with for the HiVi/Vifa, would it change much if I were to use these midbass units instead of the HiVi?
Could I just leave out your notch filter and be fine?
Could I just leave out your notch filter and be fine?
For some reason when I try to open that FRD it doesn't do anything, I still have just one straight line for frequency response 🙁
Edit: It's working in Speaker Workshop, gonna try to figure this out.
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You mean open with pcd ? The first line of the file is a header, you should remove it. About the data, don't forget to add for the woofer, the acoustic center (I use -4cm).
The peak is 4.5kHz, the notch is different 0.47mH 2.2uF R~5ohms.
See the schema. I calculate very fast. You can do other slopes it's up to you
The peak is 4.5kHz, the notch is different 0.47mH 2.2uF R~5ohms.
See the schema. I calculate very fast. You can do other slopes it's up to you
Attachments
It's going to take me a while to get used to Speaker Workshop. For some reason, PCD won't load the frd or zma files. I tried removing the first line also. It's probably office 2010, I need to install an old one on another computer.
PCD exists in an office 2007 version, it should work with 2010.
I think my simulation is not correct with the offset because the tweeter shouldn't be reversed. It is the problem with frd data when you don't know how the measurement was done. Use the woofer data without acoustic center (=0).
The crossover schema becomes below...
Have you simulated a schema ?
I think my simulation is not correct with the offset because the tweeter shouldn't be reversed. It is the problem with frd data when you don't know how the measurement was done. Use the woofer data without acoustic center (=0).
The crossover schema becomes below...
Have you simulated a schema ?
Attachments
I was trying to learn Speaker Workshop. I made some good progress yesterday, but it was still the first time I ever opened the program 😱 Today I'm going to read through this and see if I can get some results.
As far as frd data, eventually, I'd like to start measuring myself. Do you think a little microphone like this would be good enough to do decent measurements?
Behringer ECM8000 - Omni-Directional Measurement ECM8000 B&H
Yes, you don't need more 😉
The Behringer could be used but you need a calibration file.
You can also buy this one . They sell calibrated ECM 8000.
You also have the Apex 220
If you want to buy a more expensive microphone :
- Earthworks Audio - High Definition Microphones?, Handmade in the USA
- Accueil - Brüel & Kjær
I recommend you ARTA because you can measure SPL and impedance.
The Behringer could be used but you need a calibration file.
You can also buy this one . They sell calibrated ECM 8000.
You also have the Apex 220
If you want to buy a more expensive microphone :
- Earthworks Audio - High Definition Microphones?, Handmade in the USA
- Accueil - Brüel & Kjær
I recommend you ARTA because you can measure SPL and impedance.
I managed to copy yours into workshop. The crossover.chart looks good and I think I'm getting a handle on how this all works so that I'm able to sim.
Just to make sure, the crossover.chart is what I'm looking at to see the response with everything figured in, right?
Edit: That mic looks like a good deal too, not too expensive 🙂
Awesome, thanks very much. I learned a new skill today 🙂
I'm still playing with values and trying to flatten it out, but this is what I have so far. I'm trying the Eton with my other Vifa tweeter.
Attachments
Jerome, could I trouble you for one more thing, did you save the speaker workshop file when you did the HiVi/Vifa crossover for me? If you still have it, would it be possible to post it?
Attached actual measurements of the XT25 in a box. The simulation should work better. Keep in mind, these measurements are not precise but can help when you don't have anything. When you measure a loudspeaker, you measure the driver response and the diffraction due to the geometry. Thus you can make a very precise simulation and a very precise crossover. Speaker Workshop is very precise because I can superpose perfectly the actual measurement and the simulation.
Too Files - Hébergement Gratuit de Fichiers - Aucune limite - Xt25 - 3448_xt25.zip - Too Files
Too Files - Hébergement Gratuit de Fichiers - Aucune limite - Xt25 - 3448_xt25.zip - Too Files
Cool, thanks!
I'm going to do some more tinkering and see what the best combination of drivers seems to be from what I have here, so I can get the best behaved ones working together.
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