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New Dayton Audio Ultimax 15" Subwoofer at PE

post #1 of 53
1/31/13 at 10:35am
Thread Starter 
Does this driver show any promise?
http://www.parts-express.com/pe/showdetl.cfm?partnumber=295-514


•Dual 2 ohm, 2-layer copper voice coils
•Large vented pole piece and under-spider venting
•Black anodized aluminum former and black pole improves heat dissipation
•Thick, one-piece Nomex honeycomb covered cone with woven heavy-duty glass-fiber
•Tall-boy rubber surround for extra-long linear excursion without reducing cone surface area
•Dual linear stiffness spiders limit distortion and rocking modes
•Copper shorting rings and cap reduce distortion due to inductance variations

Cabinet recommendations:
• Sealed 3.1 cubic ft. (net internal) with 1 lbs. of Acousta-Stuf polyfill, f3 of 35 Hz with a 0.707 Qtc alignment
• Vented 6.0 cubic ft. (net internal, not including driver or port volume) with 6 lbs. of Acousta-Stuf tuned to 18 Hz with two 4" diameter by 26" long flared ports for an f3 of 22 Hz. Larger cabinets and lower tuning frequencies are possible. The largest recommended cabinet is 10.5 cubic feet tuned to 16 Hz using two 4" diameter ports that are 21" long for an f3 of 19 Hz.

Note: All parameters derived with voice coils wired in series.



PRODUCT SPECIFICATIONS
Power Handling (RMS) 800 Watts
Power Handling (max) 1,600 Watts
Impedance 2+2 ohms
Frequency Response 15 to 1,000 Hz
Sensitivity 89.5 dB 2.83V/1m
Voice Coil Diameter 2-1/2"

THIELE-SMALL PARAMETERS
Resonant Frequency (Fs) 19.5 Hz
DC Resistance (Re) 3.4 ohms
Voice Coil Inductance (Le) 1.31 mH
Mechanical Q (Qms) 2.40
Electromagnetic Q (Qes) 0.59
Total Q (Qts) 0.47
Compliance Equivalent Volume (Vas) 7.92 ft.³
Maximum Linear Excursion (Xmax) 19 mm

MATERIALS OF CONSTRUCTION
Cone Material Nomex
Surround Material Rubber

MOUNTING INFORMATION
Overall Outside Diameter 15.28"
Baffle Cutout Diameter 13.78"
Depth 7.55"

Dayton Audio UM15-22 15" Ultimax DVC Subwoofer 2 ohm Per Coi
Brand Dayton Audio
Model UM15-22
Part Number 295-514
UPC 844632099267
Product Category Subwoofers
Product Rating Be the first to write a review
Unit of Measure ea
Weight 28.0000
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post #2 of 53
1/31/13 at 10:42am
Aaallllright! Now we're cooking with gas.

Now then..... the 18". Dayton? The 18"?
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post #3 of 53
1/31/13 at 11:00am
Wondering how this will model out in the f20, lilwrecker, housewrecker. I sent lilmike an email inquiring about it.
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post #4 of 53
1/31/13 at 11:15am
I was wondering how long before this sucker showed up! I'm posting this as 'news' because it is! I guess I'll need some quality time with WinISD tonight.
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post #5 of 53
1/31/13 at 11:21am
Getting closer to an 18"
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post #6 of 53
1/31/13 at 11:29am
Quote:
Originally Posted by stormwind13 View Post

Wondering how this will model out in the f20, lilwrecker, housewrecker. I sent lilmike an email inquiring about it.

Works great in the F-20.

Sadly, not nearly enough motor there for the big tapped horns.
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post #7 of 53
1/31/13 at 11:52am
good to know, thanks!
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post #8 of 53
1/31/13 at 7:48pm
Looks like a a good option over the RS15HF, should be capable of about 1.5db greater output across the board in an equal sized sealed box. Needs a massive box to go ported.
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post #9 of 53
1/31/13 at 7:55pm
I'd like to see Ricci test this one out, Im sure that will happen sooner rather than later, but 19mm xmax on that seems conservative to me.
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post #10 of 53
1/31/13 at 10:36pm
That cut-out diameter in the spec doesn't quite compute. I wonder if it's a typo?
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post #11 of 53
1/31/13 at 11:49pm
Quote:
Originally Posted by fperra View Post

That cut-out diameter in the spec doesn't quite compute. I wonder if it's a typo?

Makes sense to me. Outside diameter is 1.5" bigger than the cutout. 0.75" on each side.
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post #12 of 53
2/1/13 at 12:05am
This models very well. I might opt for this over the HF series 15" even.
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post #13 of 53
2/1/13 at 5:10am
Quote:
Originally Posted by bhazard View Post

Getting closer to an 18"

Yep, getting close. I wish these had a more compliant suspension/more motor. Considering this woofer needs an 18 sized box and an 18 would have more displacement.
Edited by nograveconcern - 2/1/13 at 5:16am
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post #14 of 53
2/1/13 at 5:59am
Can some of you folks who are wizards at using winISD model this compared to the Dayton 15" HO and 15" HF, as well as the 15" DVC385? These are all good 15" drivers, but how do they stack up against the really good Dayton HO18.
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post #15 of 53
2/1/13 at 6:33am
Quote:
Originally Posted by Martycool007 View Post

Can some of you folks who are wizards at using winISD model this compared to the Dayton 15" HO and 15" HF, as well as the 15" DVC385? These are all good 15" drivers, but how do they stack up against the really good Dayton HO18.



In order at 20hz:
B = SI in 3 cu ft
G = Ult in 6.89
R = Ho in 3.5
Y = 385 in 3.7


In order at 20hz:
G = Ult in 6.89
Y = 385 in 3.7
B = SI in 3 cu ft
R = Ho in 3.5

To be fair, all in the same 3.5 cu ft box:

In order at 20hz:
B = SI
G = Ult
R = Ho
Y = 385
Edited by nograveconcern - 2/1/13 at 6:50am
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post #16 of 53
2/1/13 at 9:49am
Quote:
Originally Posted by nograveconcern View Post

Yep, getting close. I wish these had a more compliant suspension/more motor. Considering this woofer needs an 18 sized box and an 18 would have more displacement.

The suspension is pretty good where it's at, imo. Any more and it would just want an even larger enclosure. It's optimal size looks to be 3.5-4cuft which isn't all that bad. C'mon. We're all just spoiled with 18's that can fit in small boxes. There are other good choices if you want a 15" in a smaller box.
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post #17 of 53
2/1/13 at 9:58am
Quote:
Originally Posted by Scott Simonian View Post

The suspension is pretty good where it's at, imo. Any more and it would just want an even larger enclosure. It's optimal size looks to be 3.5-4cuft which isn't all that bad. C'mon. We're all just spoiled with 18's that can fit in small boxes. There are other good choices if you want a 15" in a smaller box.

huh? .707 alignment is 6.8 cu ft. It models poorly in 3.5 cu ft.

Edit: I'm still playing with it in winisd. I would probably go for 4.5 cu ft with this. A little large but manageable.
Edited by nograveconcern - 2/1/13 at 10:10am
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post #18 of 53
2/1/13 at 10:03am
This looks awesome. If they had an 18" I'd...
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post #19 of 53
2/1/13 at 10:22am
Quote:
Originally Posted by nograveconcern View Post

huh? .707 alignment is 6.8 cu ft. It models poorly in 3.5 cu ft.

Edit: I'm still playing with it in winisd. I would probably go for 4.5 cu ft with this. A little large but manageable.

Yeah. In 3.5cuft I get a .813 Qtc which is pretty good for HT. Smaller and better excursion control. Shooting for .707 Qtc is just using up more space and less excursion control down low.
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post #20 of 53
2/1/13 at 10:46am
thats not how i would model the subs i would enter the max wattage at xmax rather then using the max spl which i have found to be useless. and completely ignore pe since most scenes aren't rms but burst with subwoofers. since 2k watts @ 10ms isnt going to harm any of those subs
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post #21 of 53
2/1/13 at 10:46am
Quote:
Originally Posted by Scott Simonian View Post

Shooting for .707 Qtc is just using up more space and less excursion control down low.

Or it could be getting all the available low end without needing so much power you risk cooking the coil. I think we just have different goals.
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post #22 of 53
2/1/13 at 10:53am
Quote:
Originally Posted by nograveconcern View Post

Or it could be getting all the available low end without needing so much power you risk cooking the coil. I think we just have different goals.

its rated for 800 watts rms
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post #23 of 53
2/1/13 at 10:55am
Quote:
Originally Posted by cookieattk View Post

thats not how i would model the subs i would enter the max wattage at xmax rather then using the max spl which i have found to be useless. and completely ignore pe since most scenes aren't rms but burst with subwoofers. since 2k watts @ 10ms isnt going to harm any of those subs

Max SPL is the only meaningful graph for comparing the output of 2 subs and very helpful for designing ported enclosures. It's the most useful chart in WinISD.

If you want to find the ideal enclosure then you start looking at minimum power on the max power chart and adjust enclosure size for the power you have available. The SPL chart is the least helpful.
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post #24 of 53
2/1/13 at 10:56am
Quote:
Originally Posted by cookieattk View Post

its rated for 800 watts rms

I'm aware of that. I'm also aware that program material is not a single frequency sine wave. rolleyes.gif
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post #25 of 53
2/1/13 at 11:01am
Quote:
Originally Posted by nograveconcern View Post

Or it could be getting all the available low end without needing so much power you risk cooking the coil. I think we just have different goals.

Well... I get that but my rec for 3.5cuft needs only 600w (of a rated 800w) to fully utilize Xmax. This would be more effective for those using multiples... not just.... one sub. wink.gif Also, you're only going to get maybe 1dB of extra "available low end" but use up more space doing so. This can be an issue for those with less space than power which is usually the case.
Edited by Scott Simonian - 2/1/13 at 11:06am
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post #26 of 53
2/1/13 at 11:07am
Quote:
Originally Posted by Scott Simonian View Post

Well... I get that but my rec for 3.5cuft needs only 600w (of a rated 800w) to fully utilize Xmax.

Yeah it's 600w at 10hz, but like I said, program material is more than one frequency. You will have harmonic content at several frequencies in the octaves above 10hz that will surely have greater magnitude than 10hz. So, by the time you use up all that travel you are hitting it with 2kw.

But, like you said you get more excursion control and that's cool if that's your design goal. I'm leaning toward efficiency (and judging it against another 15 that is more efficient in smaller boxes). If you want to use 16 of them then it's a moot point.
Edited by nograveconcern - 2/1/13 at 11:13am
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post #27 of 53
2/1/13 at 11:29am
Fair enough. Both perspectives are valid in their own right.
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post #28 of 53
2/1/13 at 11:43am
Quote:
Originally Posted by Scott Simonian View Post

The suspension is pretty good where it's at, imo. Any more and it would just want an even larger enclosure. It's optimal size looks to be 3.5-4cuft which isn't all that bad. C'mon. We're all just spoiled with 18's that can fit in small boxes. There are other good choices if you want a 15" in a smaller box.

just load two per box opposing and you have ur high output 18 ;0)
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post #29 of 53
2/1/13 at 11:49am
Quote:
Originally Posted by kgveteran View Post

just load two per box opposing and you have ur high output 18 ;0)

Erm, 21" actually. wink.gif

Nice to see you around, KG. smile.gif
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post #30 of 53
2/1/13 at 2:21pm
The spider looks very similar to the Titanic MK3. Power rating is the same.
I've tried to model it against the LMS-R 15 and Titanic MK3.

Not sure why but can't get cone excursion to work but in SPL it appears to be well above both the LMS and MK3.

I model with 2 drivers (series) in a 10cu ft (290 litres) with 750Watts - 98db @ 10Hz
Qtc = 0.760

Dual MK3 Titanic in the same box and power - 87db @ 10hz
Qtc = 0.704

Considering it sells for about $30 less than the Titanic its clearly gunning to take sales from MK3 and HF/HO markets.

** Reason for box model is already got amp and start glueing the box yesterday for my planned 15 dual opposed.

Need this driver in wild getting tested to see what it can do. Strange that there is no mention of it on the Dayton website as yet.
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