Dayton NS Passive Radiators

[HareBrained]

http://www.parts-express.com/wizards/searchResults.cfm?FTR=passive+radiator&search_type=main&WebPage_ID=3&searchFilter=passive+radiator&x=0&y=0

Yahoo!!!!

And it alludes to a new NS series of subs (not yet posted).

Double Yahoo!!!!!

[Pete Schumacher]

Re: Dayton NS Passive Radiators

http://www.parts-express.com/wizards...diator&x=0&y=0

Yahoo!!!!

And it alludes to a new NS series of subs (not yet posted).

Double Yahoo!!!!!

*Fs: 22 Hz *Vas: 5.34 cu. ft. *Qms: 3.90 *Cms: 0.16 mm/N *Mms: 345 g *Rms: 11.7 kg/s *Sd: 818 sq. cm. *Xmax: 25 mm

I sure wish the Vas was higher and the Fs was lower. They act more like a vent that way.

Still, very nice to see an updated PR.

[Jeff B.]

Re: Dayton NS Passive Radiators

*Fs: 22 Hz *Vas: 5.34 cu. ft. *Qms: 3.90 *Cms: 0.16 mm/N *Mms: 345 g *Rms: 11.7 kg/s *Sd: 818 sq. cm. *Xmax: 25 mm

I sure wish the Vas was higher and the Fs was lower. They act more like a vent that way.

Still, very nice to see an updated PR.

Those numbers are before extra mass is added, Pete. Fs will drop considerably as you increase the mass. Remember, my program will calculate exactly how much you need to add. I am just not clear on if mass comes with the radiators, and how much the max you can add to each is.

[bobbarkto]

Re: Dayton NS Passive Radiators

Is this the new line?
Don't recall seeing Dayton neo subs.

Is it odd that they have 10" -15" PR's to match 8" - 12" drivers?

8" http://www.parts-express.com/pe/show...number=295-132

10" http://www.parts-express.com/pe/show...number=295-134

12" http://www.parts-express.com/pe/show...number=295-136

http://www.parts-express.com/wizards...diator&x=0&y=0

Yahoo!!!!

And it alludes to a new NS series of subs (not yet posted).

Double Yahoo!!!!!

[mgrabow]

Re: Dayton NS Passive Radiators

Nice looking unit... I wonder if it has the screw to add mass... Wish they came in 8"s as well

[ssyfert]

Re: Dayton NS Passive Radiators

Is this the new line?
Don't recall seeing Dayton neo subs.

Is it odd that they have 10" -15" PR's to match 8" - 12" drivers?

8" http://www.parts-express.com/pe/show...number=295-132

10" http://www.parts-express.com/pe/show...number=295-134

12" http://www.parts-express.com/pe/show...number=295-136

Those neo subs are new to me! Is the SPL of 93 dB 2.83V/1m so high because the 4 ohm coils are paralleled for a 2 ohkm load?
Looks like a great candidate for side firing sub on a narrow baffle tower. Hmmm.........

[bobbarkto]

Re: Dayton NS Passive Radiators

Yep, at 2ohms...:(
They indicate all specs listed using parallel wiring.

Those neo subs are new to me! Is the SPL of 93 dB 2.83V/1m so high because the 4 ohm coils are paralleled for a 2 ohkm load?
Looks like a great candidate for side firing sub on a narrow baffle tower. Hmmm.........

[dlr]

Re: Dayton NS Passive Radiators

Is this the new line?
Don't recall seeing Dayton neo subs.

Is it odd that they have 10" -15" PR's to match 8" - 12" drivers?

8" http://www.parts-express.com/pe/show...number=295-132

10" http://www.parts-express.com/pe/show...number=295-134

12" http://www.parts-express.com/pe/show...number=295-136

Not really. It's common to use PRs that have twice the Sd of the driver(s).

I agree with Pete, though. That's pretty high as a starting point for a PR. I'd lay money as well that the Fs out of the box is quite a bit higher than advertised due to the suspension. I used the smaller PR from PE in my Chameleon. The Fs was way off. Even with 30g of added weight on an 8"PR, the tuning still was higher than what it should have been without added weight. Maybe the bigger PRs will be closer to spec. The suspension Cmp always seems to be way too optimistic, similar to many drivers.

dlr

[charlielaub]

Re: Dayton NS Passive Radiators

Those numbers are before extra mass is added, Pete. Fs will drop considerably as you increase the mass. Remember, my program will calculate exactly how much you need to add. I am just not clear on if mass comes with the radiators, and how much the max you can add to each is.

This is true, but to some extent Pete has a point... I have four of the old 15" DVC series PRs. They had Fs of 18.5 Hz. This can be adjusted down a lot with the addition of mass, however there was an upper limit of about 1200g of mass before you could expect problems. This was sometimes not quite enough for what I wanted to do with the PRs, especially when used in pairs...

So, it is encouraging to see a 15" PR in the PE lineup, but I am holding my breath until I can see the full picture (the spec sheet is not yet posted).

Also, I hope that the new NS series drivers have lower Qts than the RSS series. That works much better when paired with PRs.

-Charlie

[Face]

Re: Dayton NS Passive Radiators

The woofers would be good for a clone of this.



I also have a few spare DC's floating around.

[evilskillit]

Re: Dayton NS Passive Radiators

Hrm, I'm probably missing the point of the new NS series subs. They seem to be very low profile. Good for installing under a car seat, or um, some other very small place, but for a subwoofer the xmax seems very limited compared to similar offerings in its price range? What am I missing, is that just the cost of a very shallow driver? Maybe some day when I need a really shallow driver for some reason I'll be more excited but at this point I'm just sort of going, eh? The PRs are kind of neat looking.

[charlielaub]

Re: Dayton NS Passive Radiators

Hrm, I'm probably missing the point of the new NS series subs. They seem to be very low profile. Good for installing under a car seat, or um, some other very small place, but for a subwoofer the xmax seems very limited compared to similar offerings in its price range? What am I missing, is that just the cost of a very shallow driver? Maybe some day when I need a really shallow driver for some reason I'll be more excited but at this point I'm just sort of going, eh? The PRs are kind of neat looking.

The picture is of a passive radiator. I don't think any info on the NS series DRIVERS (including pictures) is available yet. I am sure that you can expect a large magnet plopped on the back where is should be! :rolleyes:

Also, Xmax of 25mm is about twice the excursion of the RSS drivers. If the NS drivers had that much Xmax, that would be awesome, but I expect less - usually in a driver the motor is designed to conk out before the suspension, while a PR is only limited by suspension travel. Thus I would expect the NS driver Xmax to be something on the order of 15mm.

-Charlie

[Jeff B.]

Re: Dayton NS Passive Radiators

The picture is of a passive radiator. I don't think any info on the NS series DRIVERS (including pictures) is available yet. I am sure that you can expect a large magnet plopped on the back where is should be! :rolleyes:

Also, Xmax of 25mm is about twice the excursion of the RSS drivers. If the NS drivers had that much Xmax, that would be awesome, but I expect less - usually in a driver the motor is designed to conk out before the suspension, while a PR is only limited by suspension travel. Thus I would expect the NS driver Xmax to be something on the order of 15mm.

-Charlie

Charlie,

They have matching woofers too. Here's the 12":

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=295-136

As you can see, only 7mm Xmax. Not a lot of subwoof there.

Jeff

[evilskillit]

Re: Dayton NS Passive Radiators

Yeah maybe I should have included a link to the subs and been more specific. I just assumed everybody searched up the subs right after seeing the first post. Thats what I did.

8" NS Series Sub
10" NS Series Sub
12" NS Series Sub

Check out all that displacement, and for the same low low price as the RS Subs. I guess they're really shallow tho, if you're into that sort of thing ;)

Edit* Yup, somebody already posted this exact same information. I thought so but due to the reply to my last post I thought maybe those were links to the PRs instead of the sub. Oh well, here they are again.

[charlielaub]

Re: Dayton NS Passive Radiators

Yeah maybe I should have included a link to the subs and been more specific. I just assumed everybody searched up the subs right after seeing the first post. Thats what I did.

8" NS Series Sub
10" NS Series Sub
12" NS Series Sub

Check out all that displacement, and for the same low low price as the RS Subs. I guess they're really shallow tho, if you're into that sort of thing ;)

Edit* Yup, somebody already posted this exact same information. I thought so but due to the reply to my last post I thought maybe those were links to the PRs instead of the sub. Oh well, here they are again.

OK, my bad. I didn't see the driver info. Thanks for reposting.

I looked at the 12": The spec sheet lists as features "high excursion" but Xmax = 7mm. Also, Qts is not low although Vas is pretty low and [email protected] is only [email protected] but since Rs is so low (1.86 ohms) SPL that SPL at 2.83V appears to be high at 93dB. You will need to have an amp with some seriously high output current to drive these subs! Me thinks that this is exclusively for car audio, where that is the norm. The FR plot is not smooth enough for "high fidelity", which is on part with other flat piston woofers that I have seen in the past.

On the plus side, the inverted surround probably means that they can ship the driver with much less protection than the RSS series, since there are not soft parts exposed past the frame. This is similar to pro drivers, that have the built up ring next to the surround. They can be shipped in a cardboard box with zero extra padding! That, combined with the overall lower profile and light weight of the neo motor probably shaves ten to fifteen dollars off of the actual cost to deliver the driver to a customer. This will be a good thing for PE, especially during the "free shipping over $49" type promos.

-Charlie

Edit: well ok, not as bad as I originally posted above. There are dual VCs so you can connect for 8 ohms operation as well. I would have liked to have seen lower Qts to work with the PRs, but that's life. All of the drivers have 7mm Xmax, which is not bad for an 8" driver for instance. For the 8" the Vas is only 14L so you could do some really small box applications, although Fs is almost 40Hz for that one, so this will not be your next subwoofer. Anyway, I guess time will reveal if these driver can find a niche and if the distortion performance is on par with the RSS series (which I doubt but that would be nice).