Dayton Audio PN470-8 18" NEO Series Pro Woofer with 4" Voice Coil 8 Ohm
These are really inexpensive!
the suspension is very short throw.
Perhaps meant for horns more than anything?
These are really inexpensive!
the suspension is very short throw.
Perhaps meant for horns more than anything?
I heard that the listed Xmax may be based on coil vs gap length, so actual (10%THD) Xmax should be greater. Xmech is huge.
I want to see one actually independently tested.
I want to see one actually independently tested.
Dayton has really been trying to take a bite out of the highend market in home and pro audio lately.
Looks like a solid woofer. Can't be Chinese manufacturing for price to quality ratio.
Looks like a solid woofer. Can't be Chinese manufacturing for price to quality ratio.
Specs look great. 6.5mm xmax is still fine for small boxes with a higher highpass (Mobile DJ use etc).
If the ferrite 18 is anything to go by, usable excursion will be higher. Even the neo spec sheet states 48mm peak to peak without damage.
If the ferrite 18 is anything to go by, usable excursion will be higher. Even the neo spec sheet states 48mm peak to peak without damage.
I did a quick Hornresp TH 1/2 sd to double Sd and bout 4m long and it looked great!
So the 6.5 mm xmax, is that to 70% BL?
So the 6.5 mm xmax, is that to 70% BL?
Dayton seem to use the simple coil winding length-gap height/2
Would easily be usable past that by at least 2mm but that would need to be confirmed. The ferrite seemed happy close to 11mm according to build threads.
Nice driver. Good BL product. Rather high resonance, as hinted by "Pro" name.
But why would you ever want to try to fit it into a 2.7 cu ft box... and raise F3 to 77 Hz, as per the PE sim? Anybody have any idea if you could even make it fit? Crazy.
One traditional view is that once you are bigger than maybe 15 inches, the cone is too large to behave well, even if you can move a lot of air. But "behaviour" of a cone shows up nowhere in the specs although it might be apparent in THD measurements.
Is that a problem?
B.
But why would you ever want to try to fit it into a 2.7 cu ft box... and raise F3 to 77 Hz, as per the PE sim? Anybody have any idea if you could even make it fit? Crazy.
One traditional view is that once you are bigger than maybe 15 inches, the cone is too large to behave well, even if you can move a lot of air. But "behaviour" of a cone shows up nowhere in the specs although it might be apparent in THD measurements.
Is that a problem?
B.
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I'd be more interested in seeing what the specs are a year from now. When the ferrite version came out the posted specs were more impressive than they are today. Don't know if it's case of specs just being optimistic and later updated to be more representative, or of they actually made changes to the drivers. I'd hate to buy a pair, love them, and not be able to get any as good in the future. Id rather wait a while and see where they settle out.
Im planning a build in a van. Perhaps 2 to begin. Im looking for a lw corner of 15 hz and ive got about 70 cubic feet to work with. Id considered something expensive but i love the idea of using budget equipment for something ridiculous.
Evidently so. Have you seen their new 8" woofer?
Today I found plans for a 2x8" TH box, which is really intriguing in some ways. - But the designer used a really cheap driver as this was just an experiment.
I looked today for a really good 8" and found THIS:
Epique E220CF-8 8" Carbon Fiber Cone Neodymium Driver 8 Ohm
JEEZ ......
Start with a driver that has a much lower fs than a pro driver.
Look at ultimax/ho series 18s first
I had actually simmed a large vented enclosure for the Ulimax 18. I had been told that they were an unreliable driver however.
Someone correct me if I'm wrong, but as I understand it, Italy has very lax labeling laws. For instance, when I was in Milan, I wanted to buy some Italian shoes, but I couldn't find a single pair of shoes that listed it's origin. IE, they're not required to put it on the box.
We take this for granted in the States, because our labeling laws are enforced.
So if you're a Chinese manufacturer, it makes a lot of sense to build your stuff in China, ship it to Italy, then slap a 'made in Italy' label on the box. Heck, you might not even ship it to Italy.
Methinks that's why you see a lot of this:
18" Parts Express woofer for $230
18" RCF Woofer for $720
I held that PE woofer in my hands at CES this year, and to my eyes, it was every bit as nice as my B&C woofers.
Putting my Tinfoil hat back on, this might also explain why we're seeing consolidation in the prosound worlds. If all of the speakers are coming off the same Chinese assembly lines, what's the point in maintaining four offices in Italy?
Nearly everything from Tymphany is being made in China now, JBL seems to like building stuff in Brazil and Mexico but perhaps that's just to keep their products from being cloned, and who knows where B&C/Faital/RCF/18Sound makes their stuff?
In defense of RCF, they don't even list a country of origin for that woofer:
LF18N451 - rcf.it
If you want big bass in a car, it's pretty tough to beat the "conventional" formula:
A relatively small woofer in a ported box with a big voice coil and the biggest amplifier you can possibly afford.
The reason that this is the case is because horn "gain" happens in the upper end of the passband. The Fitzmaurice Autotuba is a good example of this phenomenon: above 60Hz, the Autotuba is very efficient, but below 60Hz, it's as efficient as an 8" woofer in a sealed box.
So this creates a situation where you have a lot of output where you don't need it; who cares if your sub is 100dB efficient at 100Hz when you're using an 80Hz lowpass?
Due to all this, for big bass in a vehicle, it's tough to beat one big woofer and one big amp. And of course, I learned this the hard way, I built plenty of horns and published them over on Diyma until I found out the hard way 🙁
They bought the must important manufacturer here in Brazil named SELENIUM, created at 1958 from two Germany brothers.
Now JBL is from Harman group that now is from SAMSUNG group,
The car market here have been the focus from many local manufactures, too many bad stuffs being sold resulting in good companies closing doors.
Just for curiosity, SNAKE was very competitive with SELENIUM/JBL, the two main players, and now to not close the door it was sold to other company focused on car market, so I'm afraid for its future.
JBL/SELENIUM now produces just few good things for local market and many bad things also. Probably the good things are being exported. 🙁
Big companies are not good for the society. Too much resource concentrated.
Capitalists are not trying to hear that. It's all about profit margin and nothing else.
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