SA-8 Prototype Is Here !

[SPLaudio 5,000+ posts]

****! nice score and wow they held on alot of power. probley only at res frequency would they hold up to that much power though.

 

[Highs on bass]

so for a loud daily setup maybe 4 of these @ 4 cubes tuned @ say 38 to 40 ... what kind of pwr would u reccomend ?

 

[sundownz Pro Seller]

so for a loud daily setup maybe 4 of these @ 4 cubes tuned @ say 38 to 40 ... what kind of pwr would u reccomend ?

I rate them 400-watts RMS -- so 1600-2000 on tap for four would work nicely.

In reality more than that would likely be fine... but I am rating them 400.

 

[sundownz Pro Seller]

****! nice score and wow they held on alot of power. probley only at res frequency would they hold up to that much power though.

The suspension on these is purposely really stiff -- it is quite difficult to hit the excursion limits without actually trying to do so //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[loud-n-low 10+ year member]

The suspension on these is purposely really stiff -- it is quite difficult to hit the excursion limits without actually trying to do so //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

whats the Fs on these?

 

[sundownz Pro Seller]

Looks like an awesome driver.
What is the xmax, xmag and xsus?

Tuan

Tuan,

Xmax by 70% BL is 17.5 mm

At 22mm rearward you will tap the top plate with the triple joint ring - the suspension will allow this much travel without breaking as we did it yesterday in testing with over 10x the rated power on tap on burps.

I am going to add a small spacer on the spider landing to increase this to 25mm for production as the coil doesn't reach the end of the gap until 27.25mm of throw.

 

[loud-n-low 10+ year member]

Tuan,
Xmax by 70% BL is 17.5 mm

At 22mm rearward you will tap the top plate with the triple joint ring - the suspension will allow this much travel without breaking as we did it yesterday in testing with over 10x the rated power on tap on burps.

I am going to add a small spacer on the spider landing to increase this to 25mm for production as the coil doesn't reach the end of the gap until 27.25mm of throw.

8 inch sub with 25mm xmax? good for sealed setup?

 

[sundownz Pro Seller]

whats the Fs on these?

Fresh T/S specs :

RE: 3.28 ohms (series)

FS: 41.6 Hz

Qes: 0.513

Qms: 6.606

Qts: 0.476

Le: 2.778 mH

Vas: 3.285 L

BL: 17.138 N/A

Cms: 83.341 um/N

Mms: 175.654 g

Sens: 78.476 dB @ 1w/1m

POWER: 400 RMS

I will measure again later once broken in... Cms should loosen up around 25% or so (this means lower Fs, Qts, etc)

 

[sundownz Pro Seller]

8 inch sub with 25mm xmax? good for sealed setup?

That is x-mech -- mechanically allowable throw, not x-max //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

But no... not really good sealed. Feel free to model up w/ the posted TS specs for yourself.

These were designed for ported.

 

[Skip01 5,000+ posts]

Thread jack, think SA 10s will be due in around same time as 8s or longer ways away?

49 legal with 2 8s is no joke ha. You should try a street A setup in that rex with these

 

[sundownz Pro Seller]

Thread jack, think SA 10s will be due in around same time as 8s or longer ways away?
49 legal with 2 8s is no joke ha. You should try a street A setup in that rex with these

Sean's CRX has an amp rack all up in our business *laughs* So my box wouldn't fit.

The 10s and 15s will be behind the 8s... don't have an ETA for them just yet. I am finalizing some minor details on them.

 

[1rockford1 5,000+ posts]

i might have to check out 1 or 2 of these some time. they look real nice

 

[thericanballer 10+ year member]

things looks sick

 

[sundownz Pro Seller]

Box Tweaks to be tested :

1) Rounded corners

2) Wires out of port - replaced by brass threaded rod

3) Port carriage siliconed to box and port also siliconed to carriage

4) Duct tape instead of rubber gaskets... the hole cut outs with a bit off so this may help

 

[sundownz Pro Seller]

... make that 150.0 with two 8s //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Duct tape FTW + our other improvements (round over, sealed up port, wires through brass rods).

ON TO THE SCORE !

I'll work on actually taking a video shortly and backing the score up... our camera man Derrick wasn't here today to get it the first time //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Yes... this is a sealed on the dash score.