Sundown Zv.4 10". Tantric HD10". ***The results*** - Car Audio Classifieds!
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  #1  
Old 09-12-2013, 08:11 PM
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Default Sundown Zv.4 10". Tantric HD10". ***The results***

Y'all ready?

Let me first just say thanks to Murph and Jacob for being cool about this test. Neither had anything to do with it. It was all me. And actually... Murphy HATES comparison tests like this. He was quite uninterested in the whole thing.

Speaking of comparisons... I know it's inevitable that this will be viewed as a "head to head" or a comparison or whatever- but I'd like to think of it as more of a showcase of a couple bad ass subs. So... keep that in mind.


In case you're just joining us... these two threads should catch you up...
Sundown x10, z10, or tantric sounds hd10
Tantric vs. Sundown. Who's ready for some butthurt?


Now, some of you may notice a distinct lack of videos in this thread. Well... I videoing EVERYthing at first. But after about 20 minutes of vid on my phone, I thought to myself, "Why am I videoing all of this?" And I realized it was for "proof" of the results. I came to the realization that I'd never, ever get enough video to satisfy everyone about everything so I said shit on it. I think I've earned the right not to have to spoon feed y'all "evidence" of my results. If you want to write this test off because of the lack of video, I will understand. Doesn't make it any less valid or true. There was just entirely too much of it anyway.


Ok. That's enough of that. On to the results...


TSP's as tested...

Sundown Zv.4 10" Dual 1 ohm
- Fs - 33hz
-Qts- .51
Qes- .572
Qms- 4.702
Le- .22
Vas- .44
Sensitivity - 81db

Tantric HD10 Dual 1 ohm
- Fs- 42hz
-Qts - .58
-Qes- .624
-Qms- 8.75
-Le- .22
-Vas- .58
-Sensitivity- 85db


Round 1 - Slap some shit together.
Box - 1.8 @ 31hz. Why 1.8 @ 31? Because MDF remnant and full length 4" aero while waiting on the FedEx guy to deliver the Z. That's why.


Predicted response. You can see here the Z has a distinct advantage in this alignment.



Results...
30hz.
Z- 141.5db @ 30hz
HD- 140db @ 30hz

Peak.
Z- 145.5 @ 32
HD - 144.2 @ 32

Musical peak (same song).
Z- 145db @ 32
HD- 142.7 @ 32

The Z started pulling away from the HD on music in this box. This was a full tilt run on a pretty brutal song. This isn't an average. It's just a peak score on music.

Round 2- The burp warrior.
Box - SPL cubic feet tuned to loud. This is the box I use to test every damn 12" that comes through the shop. It's probably got over 100 burps on it. Even though it's for a 12", it's the only thing I had handy.

Predicted response - N/A
Results...
Z- 151.9db @ CRX
HD - 150.4 @ one cycle lower than the Z.

The peak frequency difference is most likely due to the added displacement of the Z. Full disclosure noob moment- I completely forgot that the CRX is setup for daily and that I'm crossed at the HU lower than the peak frequencies here. These scores could have been much higher.

Round 3- TaylorFail.

I've been wanting to try something with a tube enclosure so I decided, "why not?" I fabbed it up all ghetto and what not (like I do).



Results...
Tube failure. The wood to tube joints got blown out. I didn't even record the scores. I know... I'm lame. Fwiw... I did actually try both in it in case the first sub just didn't "like" the tube. The Z was louder.

Continued...
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Last edited by TaylorFade; 09-12-2013 at 08:15 PM.
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  #2  
Old 09-12-2013, 08:11 PM
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Round 4- WinISD.

So, we have the "drop in" tests done. It's time to get all nerdy and shit. This one is the meat and potatoes of this test. In the interest of consistency and taking myself out of the equation, I deferred to WinISD for the box specs in this round. This is what any ol' Joe Blow that didn't know shit about either sub would do. So, to put it bluntly... I don't want to hear any shit about these box specs. I had to completely abandon my instincts on this one and just do what the stupid computer told me.

I obviously pulled the TSP's for both subs and plugged them in. Since the entire premise of this test was "teh lowz", specifically 30hz, I fooled with the sizes and tuning until I got both subs' response to have a fat ass peak ~ 30hz while staying musical.

Predicted response (sorry for the shitty pic).



Boxes- Yes... you're reading that correctly. 3 cubes for the HD. 3cf @ 31hz. Z- 1.4 @ 28. Both boxes are oriented the same way and have very similar port area per cube. 9.3sq in per for the HD and 10sq in per for the Z. In case you're wondering... the one with the lower F3 is the Z's plot. You will notice that the HD's big ass box has an external 45* in front of the port. The Z has one too. But it's internal.





Results...

30hz.
Z- 144.3db @ 30hz
HD- 145.1db @ 30hz

Respective box peaks.
Z- 146.8 @ 33hz
HD- 145.1 @ 30hz

Street Beat runs. These are 30 second averages on the USACi street beat tracks. They're brutal "songs" with different frequency centers. Track 9 is centered around 32hz. Track 10 is centered around 27hz.

Track 9 (32hz).
Z- 144.8 (30 second average)
HD- 144.0 (30 second average)

Track 10 (27hz).
Z- 138.0db (30 second average)
---Peak score during the run- 139.2db @ 28hz)

HD- 139.6 (30 second average)
---Peak score during the run- 141.9db @ 28hz




Round 5- Something borrowed, something loud.

To save a little time and get another data point, I borrowed a little burper from a teammate that he happened to have laying around. It's very similar to the burp warrior, but smaller and (should have) peaked a little higher.



Results...
Z- 149.1db @ CRX
HD- 148.4 @ 2 cycles lower.

In this box... the HD was pretty much tapped at volume 30 on the HU. It didn't get any louder at volume 35. That happens sometimes. A certain sub/box combo can just top out and it doesn't matter how much power you toss at it- it won't get any louder. The Z gained .4 from volume 30 to volume 35 and climbed to 149.5 but...



Shit happens.

Wrap up- "Space makes bass"

I'm exhausted. And forgot every damn thing I was going to say here. Lol.
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Last edited by TaylorFade; 09-12-2013 at 08:21 PM.
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  #3  
Old 09-12-2013, 08:19 PM
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Nice results...

Quote:
30hz. Z- 144.3db @ 30hz HD- 145.1db @ 30hz
Interesting in deed
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Old 09-12-2013, 08:19 PM
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what I was expecting, other than the HD taking the Z out in the daily box. I figured that low the Z would have been in it's sweet spot.
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Old 09-12-2013, 08:21 PM
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Good shit. Not bad results. Impressed by the results.

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Old 09-12-2013, 08:22 PM
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Good test fellow Taylor. Did a great job as always.

Quote:
Originally Posted by Jeffhulbert50 View Post
Nice results...



Interesting in deed
personally, I payed the least attention to that part of the test.lol. WinISD Is some buthole, and has no predication on in vehicle response. IMO, the score difference there could SOLELY be attributed to the fact that the box for HD was 2x+ the size, allowing to reach mechanical limits on lower power, and extended to lower frequencies more.
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Old 09-12-2013, 08:22 PM
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3hz and a 2db gain. Interesting
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4 15s + Flat Wall + 10k = Loud

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Old 09-12-2013, 08:24 PM
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Ftw!!!!
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Old 09-12-2013, 08:25 PM
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Quote:
Originally Posted by SINTORMAN View Post
3hz and a 2db gain. Interesting
Show's how wrong Winisd's predicted rolloff's are after you factor in cabin geometry.
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Old 09-12-2013, 08:25 PM
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The z likely would have beat the HD as well if it had a bigger box in winisd test. Jacob said the zv4 need 50% more volume then zv3. Great test tho...how did they sound on music?
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