Sundown X-12 Prototype

[Duran 387]

I thought I read somewhere that the ring made the impedance fall to low on the Z v2 so you discontinued use of the ring on the Z v2?

That was inductance

[sundownz 197]

I thought I read somewhere that the ring made the impedance fall to low on the Z v2 so you discontinued use of the ring on the Z v2?

The top ring is the one I took off -- they still and always have also had an internal shorting ring.

[CrazyKenKid 64]

aww got ya!! I guess i got the two words mixed up in my head! but i did get the 'ance' part of the word part lol! I knew it had to do something with an ance lol!

[sundownz 197]

We did our thermal cycle test on the X-12 with CCAW coil (final will have copper which we will also test) -- 1000 watts starting power for 5 minutes dropped to 900 across the duration so 10% compression... cranked up to ~1200-1250 and played for another 90 seconds before thermal failure.

Again, our 60 Hz thermal test is brutal and we have fried MANY other drivers in ~2 minutes at their rated power levels. It's a very difficult test. All of our subs must pass for at LEAST 5 minutes to get their rating and we usually crank them up past rated after the 5 minute cycle as well.

It's a long boring video and not quite a production model so I won't upload it -- when we do the copper production unit I will.

[Kanaworm$ 292]

Gotta love the Sundown product torture testing!

Looking forward to the production version!

[brandenburg.daniel 0]

We did our thermal cycle test on the X-12 with CCAW coil (final will have copper which we will also test) -- 1000 watts starting power for 5 minutes dropped to 900 across the duration so 10% compression... cranked up to ~1200-1250 and played for another 90 seconds before thermal failure.

Again, our 60 Hz thermal test is brutal and we have fried MANY other drivers in ~2 minutes at their rated power levels. It's a very difficult test. All of our subs must pass for at LEAST 5 minutes to get their rating and we usually crank them up past rated after the 5 minute cycle as well.

It's a long boring video and not quite a production model so I won't upload it -- when we do the copper production unit I will.

[brandenburg.daniel 0]

Any new updates on this line... Eta?? Looking to start build around summer time

[sundownz 197]

I should have the newer prototypes soon.

[sundownz 197]

And the X-12 prototype with copper coils arrived :

They spec out well... motor force is where I want it as are other specs. Some more details to go and we may run these and open pre-ordering.

[CrazyKenKid 64]

wow those look nice what is the diameter on the motor?

[ford302redneck 15]

Post specs? Or a few to give us a idea.

[sundownz 197]

wow those look nice what is the diameter on the motor?

200mm

[sundownz 197]

Post specs? Or a few to give us a idea.

Will do so likely next week.

[kkk4 3]

only 12"?

[edouble101 314]

I can't keep up with Sundown constantly working on product improvements and new releases!

[edouble101 314]

Any updates? Will enclosure sizes be similar to the sa line? When will the preorder start?

[sundownz 197]

D4 specs with a very short break-in period :

Re : 7.00 ohms

Fs : 34.61 Hz

Qes : 0.57

Qms : 4.45

Qts : 0.51

Le : 5.05 mH

Vas : 17.39 L

BL : 29.23 NA

Mms : 324 g

Cms : 65.1 uM/N

SPL : 82.7 dB 1w/1m

Xmax : 19.0mm one-way

Bl^2/Re : 122

With break-in the Fs and Qts will drop a bit as well.

[edouble101 314]

Wow the efficiency looks horrible

[sundownz 197]

Wow the efficiency looks horrible

Please read :

What your statement should read is... "Looks like it will have great bottom end in a small box"

[edouble101 314]

I never said it wasn't going to be a great sub. Fs is much lower...

[sundownz 197]

Essentially what I'm saying is stating the "efficiency is horrible" is not correct; as sensitivity does not = efficiency -- at least not on sub-bass material. Which is why I posted the linked thread originally

If you climb to over 50-60 Hz then, sure, a sub with a higher "sensitivity" would gain in output -- but for what people want in a true car audio sub-woofer (small box / tremendous low-end) this type of parameter set works great. It's very similar to the SA line in parameters.

[edouble101 314]

Thanks for explaining that.

[Duran 387]

I never said it wasn't going to be a great sub. Fs is much lower...

Fs won't play that big a part in the sub bass game either

[sundownz 197]

D4 specs with a very short break-in period :

Re : 7.00 ohms

Fs : 34.61 Hz

Qes : 0.57

Qms : 4.45

Qts : 0.51

Le : 5.05 mH

Vas : 17.39 L

BL : 29.23 NA

Mms : 324 g

Cms : 65.1 uM/N

SPL : 82.7 dB 1w/1m

Xmax : 19.0mm one-way

Bl^2/Re : 122

With break-in the Fs and Qts will drop a bit as well.

D2 specs with a very short break-in period :

Re : 3.94 ohms

Fs : 34.62 Hz

Qes : 0.52

Qms : 4.34

Qts : 0.46

Le : 3.57 mH

Vas : 17.16 L

BL : 23.28 NA

Mms : 328.7 g

Cms : 64.27 uM/N

SPL : 83.11 dB 1w/1m

Xmax : 19.0mm one-way

Bl^2/Re : 138

[ford302redneck 15]

I never said it wasn't going to be a great sub. Fs is much lower...

Fs won't play that big a part in the sub bass game either

Its amazing when people only look at two specs of a subwoofer and automatically assume one thing or another.

I like the 1w/1m though. No BS rating FTW.