Hello, I'm desperately looking for .frd and .zma file of the Peerless 8'' HDS 830869 woofer. I've tried to extract file from official datasheet but there's something I'm not sure of their precision.
Thank you very much : )
Thank you very much : )
Have you seen the Tymphany data sheet and the Hobby Hifi test results?Look reliable to me. But then I mostly use my own measurements...https://www.hifisound.de/out/media/pdf.php?r=0bAN%2BN3QNL8dd6kxGvlWHoyO0Ws9wEUfw45VeB3WmBsqC3mDycbNapO1Q7Ol8%2FGfeY9Zd9seL4WiHw5ljfBx2g%3D%3D.pdf
thanks, but impedance graph is cut..do you have your own measurement about this woofer? Would you give me them? I would be enormously grateful..: )
Hi, I had a look at the peerless datasheet, the impedance plot looks fine to me... It looks a bit odd because it cuts off at 20Hz (which pretty much all impedance plots do) and the resonant frequency is 29Hz, so therefore it hasn't fully flattened out again by 20 Hz.
Do you need impedance data below 20Hz?
Do you already have the woofers on hand? If you do, and you have a sound card with line out and line in then impedance measurements are about the simplest measurement you can do yourself. Ideally do them in the final enclosure.
I use REW (room eq wizard) and a Walin jig, but you can make up a simple cable for just a few dollars Cables
The datasheet at parts express http://www.parts-express.com/pedocs/specs/264-1098-peerless-830869-specifications.pdf has a good impedance plot on it. I just traced it fine (only problem is that the trace tool I use has a max of 80 ohms so the peak of the impedance curve is very slightly truncated.
edit: actually tymphany's website has an interactive graph which shows the peak is 82.6 ohms at 28 hz, so I have just fixed it and re-attached 😉
Tony.
Do you need impedance data below 20Hz?
Do you already have the woofers on hand? If you do, and you have a sound card with line out and line in then impedance measurements are about the simplest measurement you can do yourself. Ideally do them in the final enclosure.
I use REW (room eq wizard) and a Walin jig, but you can make up a simple cable for just a few dollars Cables
The datasheet at parts express http://www.parts-express.com/pedocs/specs/264-1098-peerless-830869-specifications.pdf has a good impedance plot on it. I just traced it fine (only problem is that the trace tool I use has a max of 80 ohms so the peak of the impedance curve is very slightly truncated.
edit: actually tymphany's website has an interactive graph which shows the peak is 82.6 ohms at 28 hz, so I have just fixed it and re-attached 😉
Tony.
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Thank you very much Wintermute, this is the reason because I'm looking for better data than my frd and zma:
this is a simulation using your zma file (and related Tymphany T/S parameters)
this is instead a simulation using zma file I've built from anothe datasheet (in which T/S parameters are slightly different and also crossover was optimized for that): I can't get a reason for the 150 Hz peak as the 650 one!
I'll use your file! Just a question: is your zma measured or extracted from datasheet? in the second case, how do you build minimum phase? I've used Response Modeler application but I think I've made some mistake.
However fot the 830869 there are different datasheets around the web.. : (
this is a simulation using your zma file (and related Tymphany T/S parameters)
this is instead a simulation using zma file I've built from anothe datasheet (in which T/S parameters are slightly different and also crossover was optimized for that): I can't get a reason for the 150 Hz peak as the 650 one!
I'll use your file! Just a question: is your zma measured or extracted from datasheet? in the second case, how do you build minimum phase? I've used Response Modeler application but I think I've made some mistake.
However fot the 830869 there are different datasheets around the web.. : (
This may help - Peerless 830869 crossover
I don't have the zma and frd files off hand. Hopefully, they are still in my pc that I use for measurements. If you need them, I'll try to dig them out.
Regards
Mike
I don't have the zma and frd files off hand. Hopefully, they are still in my pc that I use for measurements. If you need them, I'll try to dig them out.
Regards
Mike
How do you like that speaker and horn combo Mike?
I reckon the final zobel helps the peerless at the upper ends.
I reckon the final zobel helps the peerless at the upper ends.
Thanks Chua, I would be very grateful for your files : )
I've already seen that project but having already a tweeter to use that bass section isn't compatible with it.
I've already seen that project but having already a tweeter to use that bass section isn't compatible with it.
hi infinia
Yes, the zobel helps with the roll off. Without it, the slope won't be as steep.
Frankly, I was quite impressed with the speaker+horn combo. The Peerless, as well as the Selenium/horn, are quite friendly to work with.
One thing I noticed with this Peerless 830869 is that it is a very "Polite" driver. No funny peaks to deal with but at the same time, I feel it lacks some punch in the midbass. The speaker sounds much better if a 12" for the bass is added. Of course that would mean using the Peerless mainly for mid duty, like 100Hz to 1,500Hz. The speaker really comes alive then. But the downside is more cost and more complicated.
Yes, the zobel helps with the roll off. Without it, the slope won't be as steep.
Frankly, I was quite impressed with the speaker+horn combo. The Peerless, as well as the Selenium/horn, are quite friendly to work with.
One thing I noticed with this Peerless 830869 is that it is a very "Polite" driver. No funny peaks to deal with but at the same time, I feel it lacks some punch in the midbass. The speaker sounds much better if a 12" for the bass is added. Of course that would mean using the Peerless mainly for mid duty, like 100Hz to 1,500Hz. The speaker really comes alive then. But the downside is more cost and more complicated.
hi andreaemme
I'll go and dig my pc later in the day. I'm sure they are there somewhere.
What tweeter are your using and are you planning a 2-way?
I'll go and dig my pc later in the day. I'm sure they are there somewhere.
What tweeter are your using and are you planning a 2-way?
Is that Peerless of yours sealed?
Made a 2 way with Peerless PPB 6,5". Excellent midbass, vented.
Hi Mike
Thanks for the answers, I was mainly interested in your impression of the sound of the / compression horn combo , and future plans on experimenting / changing anything ?
Is it your daily speaker, seeing it was last of the series?
hi infinia
This is not my daily speaker. I was basically experimenting. I wanted to hear what the Selenium and horn combo sound like. I was pleasantly surprised that the combination sounded pretty good. I heard complaints about the Selenium D220ti being harsh or bright but I heard nothing of that sort. Maybe it was simply a question of not being able to control it. As with most compression drivers and horns, it's essential to have some reliable measurement tools to work it. Without it, it's easy to sound bad.
Presently, I'm listening to the speaker below. It started out as an evaluation of 2.5 concept. It ended up a bit more complex. The tower is essentially a modified 2.5 in the sense that the upper HiVi M5a is a Band Pass. Otherwise, the midbass gets bloated. The lower M5a has only an inductor.
This on it's own would be acceptable. But I like my music to go down to about 40Hz. So I added a bandpass sub, the one right below. After some re-tuning, it really sounds nice. The system is fully passive, even the bandpass sub. Within is a 8" Dayton SD215 DVC. Cheap and good.
This is not my daily speaker. I was basically experimenting. I wanted to hear what the Selenium and horn combo sound like. I was pleasantly surprised that the combination sounded pretty good. I heard complaints about the Selenium D220ti being harsh or bright but I heard nothing of that sort. Maybe it was simply a question of not being able to control it. As with most compression drivers and horns, it's essential to have some reliable measurement tools to work it. Without it, it's easy to sound bad.
Presently, I'm listening to the speaker below. It started out as an evaluation of 2.5 concept. It ended up a bit more complex. The tower is essentially a modified 2.5 in the sense that the upper HiVi M5a is a Band Pass. Otherwise, the midbass gets bloated. The lower M5a has only an inductor.
This on it's own would be acceptable. But I like my music to go down to about 40Hz. So I added a bandpass sub, the one right below. After some re-tuning, it really sounds nice. The system is fully passive, even the bandpass sub. Within is a 8" Dayton SD215 DVC. Cheap and good.
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hi Lojzek
Box is vented. It is not that there's no bass. It's just that it is not the kind of bass I want.
I like the midbass to be clear and dynamic. At the same time, it must go down to 40Hz for it to produce most music properly.
Box is vented. It is not that there's no bass. It's just that it is not the kind of bass I want.
I like the midbass to be clear and dynamic. At the same time, it must go down to 40Hz for it to produce most music properly.
Thanks Michael for your interest, I'm going to tweak my Murphy Blaster's New Vifa Tower substituting woofer and leaving ScanSpeak D9500 tweeter but a bit lower cut.
My desire is to obtain just that energy in the mid-bass that Vifa M21WO39 lacks, and searching between high Qms and BxL drivers I've selected just Peerless 830869 and Visaton GF200 with series coils.
Peerless was my first love target but you've just told that driver lacks in the mid-bass.....
I'm desperate! So who knows Visaton GF200 woofer? Does it work well in the mid-bass region? I love punchy sound in that band,I'm just looking for a energic and crisp woofer to work with ScanSpeak D9500 in a simple two way 30-50 liters tower.
Do you any other energic and punchy in the mid-basses woofer?
My desire is to obtain just that energy in the mid-bass that Vifa M21WO39 lacks, and searching between high Qms and BxL drivers I've selected just Peerless 830869 and Visaton GF200 with series coils.
Peerless was my first love target but you've just told that driver lacks in the mid-bass.....
I'm desperate! So who knows Visaton GF200 woofer? Does it work well in the mid-bass region? I love punchy sound in that band,I'm just looking for a energic and crisp woofer to work with ScanSpeak D9500 in a simple two way 30-50 liters tower.
Do you any other energic and punchy in the mid-basses woofer?
hi andreaemme
If you want punchy midbass, check out the Usher 8137A. Nice and strong. The 830860, in comparison, sounds lame.
The problem with the Usher is it does not extend that high for a 2-way. But then, you can't get everything. The 830869 shines for mids, whereas the Usher (below pic) is excellent for bass and midbass duty. I had to cross it at about 700Hz. After that, the cone breakup becomes a problem.
As for the Visaton GF200, I'm afraid I've not worked on it before.
If you want punchy midbass, check out the Usher 8137A. Nice and strong. The 830860, in comparison, sounds lame.
The problem with the Usher is it does not extend that high for a 2-way. But then, you can't get everything. The 830869 shines for mids, whereas the Usher (below pic) is excellent for bass and midbass duty. I had to cross it at about 700Hz. After that, the cone breakup becomes a problem.
As for the Visaton GF200, I'm afraid I've not worked on it before.
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Thank you very much Michael for your advice,very appreciated. However if it won't be a problem would you give me Peerless measurement? Thanks AMD congratulations for your works.
Hi Andrea,
bear in mind Peerless 830869 has TS parameters like this:
Fs=30 Hz, maybe too optimistic, in that range surely
Qts=0,38; the same as above, probably higher
Vas =70 litres
Conclusion, need a large vented box for good bass, close to Vas.
Hi I extracted it from the datasheet using nth technologies spl copy and then extracted the minimum phase using the minimum phase extraction spreadsheet (I can't remember where I got it from so have attached it here).
I assume you have spliced your modeled low end response to the traced response? Did you use the frequency response blender? It is really excellent and will adjust for baffle step as well. software I highly recommend it!
Tony.
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