Zaph (John Krutke) has it on his blog section here.. BUT it's the 4 ohm version. (..scroll way down to see it):
Zaph|Audio
Also note that at one time the driver was about double the cost of what it is now. (..I guess "economies of scale" + lower neo mag. prices had something to do with that, along with the fact that it is NOT new.)
Zaph|Audio
Also note that at one time the driver was about double the cost of what it is now. (..I guess "economies of scale" + lower neo mag. prices had something to do with that, along with the fact that it is NOT new.)
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There are some things money can't buy. For everything else there's HifiCompass.
Compare | HiFiCompass
Spoiler alert:
Wavecor WF182BD03 - slightly better linear distortion
Vifa NE180W-4 - slightly better non-linear distortion
Compare | HiFiCompass
Spoiler alert:
Wavecor WF182BD03 - slightly better linear distortion
Vifa NE180W-4 - slightly better non-linear distortion
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I did not. I wanted to order it myself but these last few years proved to be quite turbulent for me - even without the covid shite. I moved two times, sold my flat in the middle of covid lockdown, in the meantime realestate prices went up so i'm looking for a year now to buy a piece of land near my hometown and build a house (which is, believe it or not, cheaper option than buying a flat in my country). In between all that fuss i've bought a pair of Kef R series coaxes, 10x7" midwoofers, 8x Peerless TC9's, few different pairs of tweeters, Faital 12's, 2xFaital 5fe120's, a pair of DFM2535's, B52 wg's and i'm eyeballing few more speakers before price of everything goes to hell (copper, neodimium, aluminium and steel already went up in price). I want to have something to play with when i settle down.
In short, failed to remember STX midranges 🙂
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Zvu, sounds like a lots of fun "... moved two times, sold my flat...." - damn it. The COVID doesn't take easy on us. We are on lockdown in Ottawa and people are getting vaccinated, just a little late. Got the first shot of Pfeizer. But, my friend in Warsaw lost her business as income didn't cover the rent: and similar stories are everywhere - Ku..a mać, ale życie.
At least your spkr inventory increased, the Kef and Fitals is something I would like to try. I have to find tweeter that I like that won't break my wallet. And my friend Kravchenko might go to China as he plays with some waveguides and his tweeter. But for now everything is a "?" I heared that price of many things will go up, as China wants to change it's economy and lower it's share as 'one and only' supplier of cheap goods for the world. Maybe I pick up some pieces as well. Everything wood based went up twice in price during COVID.
Take care, thanks for reply
At least your spkr inventory increased, the Kef and Fitals is something I would like to try. I have to find tweeter that I like that won't break my wallet. And my friend Kravchenko might go to China as he plays with some waveguides and his tweeter. But for now everything is a "?" I heared that price of many things will go up, as China wants to change it's economy and lower it's share as 'one and only' supplier of cheap goods for the world. Maybe I pick up some pieces as well. Everything wood based went up twice in price during COVID.
Take care, thanks for reply
I didn't get vaccinated yet. My kids, wife and i contracted covid19 last november. We did antibodies test and they are still quite high so doctors advised not to get vaccinated untill they start to decline.
We planned to sell the flat and move. Sale contract was signed right before march 2020. What i didn't/couldn't plan is realestate price jump that happened. We'll get where we wanted, but it will cost us more.
Neodimium had 100% price increase. Stanislav from BliEsma was waiting suppliers to form a new price so that he can form price for his new tweeters and dome midranges he has developed.
A 100% price increase..??? Damn!!!
We planned to sell the flat and move. Sale contract was signed right before march 2020. What i didn't/couldn't plan is realestate price jump that happened. We'll get where we wanted, but it will cost us more.
Neodimium had 100% price increase. Stanislav from BliEsma was waiting suppliers to form a new price so that he can form price for his new tweeters and dome midranges he has developed.
A 100% price increase..??? Damn!!!
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The NE180W-08 is a fantastic driver. IMO likely the best overall 7" paper cone driver you can buy for under 150 bucks. The FR measurements I've done are much smoother than production measurements published by the manufacturer. It does need a 4.8k notch in most cases if you want to use a 2nd order LP. In a 3 way system, it will keep up with 89 - 90 dB/W LF and HF drivers if you take mid band crossover summing gain into account.
I typically use this driver as a mid in larger 3way designs. It handles alot of power and doesn't exhibit much power compression like other smaller VC drivers. The basket will get warm to the touch running it hard but never gets hot. This is at 110 dB C weighted playback levels and 200 Hz LR12 HP, midfield in a 200 sq ft room. In a 2 way ported bookshelf design, it has amazing low end capabilities and will also play impressively loud at low THD. It works well together with the Morel CAT378 as a small nearfield monitor crossed over at 2200 Hz LR12.
As a noob I have to ask, if you use a 2nd order lp, will a small tank cap in parallel connection with the coil will do the job for notching the Himalayas at 4.8khz?
I am to build something like this:
The Texas Flood - Vifa NE180W-08 and RS28A 2-way in PE 0.5 cu. ft. Cabinet -
Techtalk Speaker Building, Audio, Video Discussion Forum
And add a tank cap in parallel with the coil and rework the Tweeter, since it will probably be sb26cdc
I am to build something like this:
The Texas Flood - Vifa NE180W-08 and RS28A 2-way in PE 0.5 cu. ft. Cabinet -
Techtalk Speaker Building, Audio, Video Discussion Forum
And add a tank cap in parallel with the coil and rework the Tweeter, since it will probably be sb26cdc
This one looks fairly easy. I don't have the drivers to measure and can't comment too much. One thing the SB26ADC/CDC has falling response from 4-5kHz towards crossover point, peaking around 5-6k and seems like reducing the Vifa's 4.8kHz break-up would be a very good idea (RLC tank) if possible.
Any time you alter the parallel cap value of a 2nd order LP filter away from the ideal, you will get some form of peaking in your response. You will need an LCR notch to reliably remove the 4.8k woofer breakup peak. Without the LCR, you can hear that peak on axis at higher listening levels even with a relatively low 2nd order filter and especially with a very good tweeter that has low THD.
I have experimented with coatings on the NE180 and realized most of the upper mid breakup comes from the dust cap. A thin coating of silicone reduces the 4.8k area peaking by a few dB, perhaps enough to omit the LCR notch. Does it hurt the overall character of the driver? Not to my ears, but you still have alot of that hash left from the cone itself, so its not a worthwhile mod IMO considering the risks of going too far with the coating.
profiguy thanks for the silicon coating idea, just something to consider. Many hard paper cone like mentioned Vifa, SB have this hash or noise to it. Actually I don't know if I would want the LR2 with NE180. LR4 around 2k wouldn't be no problem - it should provide enough attenuation to make the break ups less noticeable. Generally not to many 6-7" midbass drivers and tweeters can be safely mated with LR2 filtering. I tried some simple modeling based on data published by Zaph (NE180W-4) and LR4 seems to do the trick, but for LR2 I would like to have one measured in the actual enclosure to say something useful.
Attachments
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I understand your point. I like the way LR2 combines with the HF. It just sounds a bit more natural to me and is the best compromise between phase shift and off axis summing behavior.
I've also discovered a small resonance issue in the motor system rear vent. There isn't much you can do about that, unless you want to compromise VC venting. This woofer is also very sensitive to enclosure dampening, specifically where its placed behind the driver and what kind of material is used.
I've also discovered a small resonance issue in the motor system rear vent. There isn't much you can do about that, unless you want to compromise VC venting. This woofer is also very sensitive to enclosure dampening, specifically where its placed behind the driver and what kind of material is used.
I totally agree with you about the sound signature of LR2. The LR2 sounds more natural, smoother, especially above the crossover frequency where the tweeter radiation takes over.
Damn it - so Vifa isn't that easy to work with. I wanted to try the 4ohm version but now you got me scared.
Usually with the egg foam covering the sides or layers of Dacron, I would put some Dacron behind the driver to lower the reflections close to the cone - I rather have less port output than funky midrange.
Again thanks for advice.
Damn it - so Vifa isn't that easy to work with. I wanted to try the 4ohm version but now you got me scared.
Usually with the egg foam covering the sides or layers of Dacron, I would put some Dacron behind the driver to lower the reflections close to the cone - I rather have less port output than funky midrange.
Again thanks for advice.
Back to the original topic... a year ago I built a small 12 liter sealed box speaker using a SB17MFC35. I chose the polycone over the paper cone because I expected it would be easier to design a crossover for the smooth rolloff of the polycone.
I am very pleased with my finished speaker.
Link Request Peer review of crossover
I am very pleased with my finished speaker.
Link Request Peer review of crossover
Most *good drivers are like that. 😉
(..in this respect then it's really no more difficult to design for than other good drivers.)
..and of course at least that much, (..more than double that really), away from the rear of the driver.
*at least drivers that are better at revealing low-level detail.
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