Testing "SA-12" Prototype

[snoopysnooper 10+ year member]

$200 is the MSRP.
"Street price" pending.

wordddddd...

im def. coppin a pair of them then, lol

i know the "street price" is always well below MSRP

 

[sundownz Pro Seller]

Factory finished my new prototype - I should have it soon... thing is a MONSTER:

It is as big as it looks //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

MSRP will probably creep a little over 200 for my changes, but not much.

 

[denim 5,000+ posts]

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[Notloud00 10+ year member]

Daily sub - sounds good, handles alot of power, hard to break, and pretty loud too.

idk i think this and the sd 2.5 will be very close. we need both um to be compared side by side //content.invisioncic.com/y282845/emoticons/sneaky.gif.7189749b3a3f769e8815b47e8ae87f88.gif

 

[sqhertz 5,000+ posts]

idk i think this and the sd 2.5 will be very close. we need both um to be compared side by side //content.invisioncic.com/y282845/emoticons/sneaky.gif.7189749b3a3f769e8815b47e8ae87f88.gif

and the IA LI. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[sundownz Pro Seller]

I am pretty sure it will hang with anything in it's class //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Q&A 10+ year member]

Looks interesting.

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Is the plastic ring for increased excursion clearance?

 

[sundownz Pro Seller]

Looks interesting. //content.invisioncic.com/y282845/emoticons/clap.gif.178cba2c538c68e720c727fcb024b19c.gif

Is the plastic ring for increased excursion clearance?

So the pole cant hit the dust cap under extreme excursion levels //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif It would take 3-4x rated power to make that happen - but you never know *laughs* Tried to cover all the bases here.

Also does give the spider a wee bit more rearward clearance for the inner rolls on back stroke.

 

[kmanian 5,000+ posts]

does using plastic as the ring material insulate the basket from heat transfer from the motor structure? if so would the thermal limit be raised if the ring was metal and the basket helped disapate some of the heat?

Ignoracnce here, just thinking out loud and wanting to learn

 

[sundownz Pro Seller]

It would benefit passive cooling but the ring would have to be a non magnetic metal which would be expensive - and this is a budget driver. This sub doesn't really need the added passive cooling of the frame to *easily* handle rated power and more, though.

 

[kmanian 5,000+ posts]

understood an schooled

 

[sundownz Pro Seller]

It is a good question - I've done prototypes with aluminum rings before. Its awesome and does aid passive cooling but cost to benefit is not the best -- on an expensive driver where cost is not an object it is something I would consider strongly, though.

The PG TI Elite 12D has an aluminum ring on the top plate, FYI //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[kmanian 5,000+ posts]

It is a good question - I've done prototypes with aluminum rings before. Its awesome and does aid passive cooling but cost to benefit is not the best -- on an expensive driver where cost is not an object it is something I would consider strongly, though.
The PG TI Elite 12D has an aluminum ring on the top plate, FYI //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

In your opinion, is this type of cooling (basket) a real world benifit? would there be appreciable power handeling or longevity?

 

[sundownz Pro Seller]

In your opinion, is this type of cooling (basket) a real world benifit? would there be appreciable power handeling or longevity?

Over the long term it is a benefit - in my testing if you play a sub for 1+ hour at high power it will get quite warm up to the rim of the basket. The cast aluminum frame is a pretty good heat-sink. I've had frames too hot to touch after 2+ hour power testing.

On the SA-12 the frame will eventually soak up heat through the basket screws and just by proximity to the hot coil - but the heat transfer is not as efficient due to the plastic ring. But the ring was necessary to help prevent potential physical damage to the driver.

 

[kmanian 5,000+ posts]

Over the long term it is a benefit - in my testing if you play a sub for 1+ hour at high power it will get quite warm up to the rim of the basket. The cast aluminum frame is a pretty good heat-sink. I've had frames too hot to touch after 2+ hour power testing.
On the SA-12 the frame will eventually soak up heat through the basket screws and just by proximity to the hot coil - but the heat transfer is not as efficient due to the plastic ring. But the ring was necessary to help prevent potential physical damage to the driver.

I definately understand the reason for the plastic, a driver like that for the $200 range is exactly what is needed in the market place, raising that price point would be unfortunate, so the potential benifits to cost wouldn't be worth it at the risk of the increased MSRP. You have to stop somewhere. I am very excited about this sub linem I think it will be well recieved.

Thanks for the tutorial