SA-8 Prototype Is Here !

[sundownz Pro Seller]

Quick question, is that the final motor structure look with the flat back plate like that? Sick scores though, I am almost thinking about scrapping my idea for two 12s and just run 4 of these to see what I can do out of the trunk.

Yah, that is final - just flat like the SA-12s.

 

[hitm4n666 10+ year member]

are these ran in odds or evens? and best if sealed or ported

im feeling 4 8's in a ported box but i dun know wat demensions for a box to achieve full performance

 

[Toxic Tuan 10+ year member]

Can you please measure the T/S parameters again after it's been well broken into?

Seems like this sub will do very well in a modified horn type as well as compression ported type enclosures.

Jacob, I need to get ahold of you.

Tuan

 

[sundownz Pro Seller]

Tuan,

I am a bit behind on e-mails -- if you sent me one I'll get to it as soon as I can.

I measured it again after my testing so far... Fs dropped 1 Hz so far. I think break-in will take a while on these to make any significant difference.

 

[sundownz Pro Seller]

are these ran in odds or evens? and best if sealed or portedim feeling 4 8's in a ported box but i dun know wat demensions for a box to achieve full performance

Not sure I understand the first question...

But they are optimized for ported... you can go extremely small if you need to, 0.6 cubes is a good starting point each. Bigger is also fine.

 

[sundownz Pro Seller]

SPL per watt testing (total power... divide by 2 for each woofer):

330 watts = 143.9 dB (HU @ -10 sub control)

430 watts = 144.8 dB (HU @ -9 sub control)

580 watts = 145.6 dB (HU @ -8 sub control)

750 watts = 146.4 dB (HU @ -7 sub control)

990 watts = 147.2 dB (HU @ -6 sub control)

1290 watts = 147.8 dB (HU @ -5 sub control)

1710 watts = 148.5 dB (HU @ -4 sub control)

2260 watts = 149.1 dB (HU @ -3 sub control)

3010 watts = 149.9 dB (HU @ -2 sub control)

Going to try -1 shortly after they cool off... I dropped a 4500D in the Jeep instead so I am a bit more flexible on power if I decide to put something different in for any upcoming shows. So I have the potential to put more power than I have before on them now.

 

[sundownz Pro Seller]

-1 was too much with the 4500D -- woops //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

I have a few tweaks to production that should allow that sort of power on burps. Still didn't kill it thermally, though !

 

[SPLaudio 5,000+ posts]

thats nutz power on 8s.

that jeep is loud though with ur first numb on such little power...

 

[sundownz Pro Seller]

My single 15" box is even louder per watt //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

FYI -- I sheared the aluminum former in two -- didn't break any glue joints or thermal the coil. I suspect I bottomed out my triple joint ring on the top plate hard enough that the shock broke off the former. Of course I had 2000 or so watts per sub at this point too -- something has to go eventually.

I will add a LITTLE more rearward clearance on production models so even doing that will be slightly more difficult.

 

[Ellsworthz 10+ year member]

wow, so their taking 4X their rated ammount? thats insane..

you should rate them 1k each for daily //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[sundownz Pro Seller]

wow, so their taking 4X their rated ammount? thats insane..
you should rate them 1k each for daily //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

That is a bit much... it's still just a 2" voice coil.

After all... on right around "rated power" I was right around 147 dB... moving to almost 4x rated only gained me ~3 dB or so.

No need to stress the subs so hard for such a small gain in a daily system. I do like to push everything to it's limits for SPL, though //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[sundownz Pro Seller]

Don't worry though -- I am going to get more coils in and re-cone these two for more testing while we wait on production models.

 

[80INCHES 5,000+ posts]

hmm 4 of these on 1 3500d 2.5 cubes ported wth 2 6inch aeroports tuned to 35hz...thats a 150 daily driver

80

 

[SPLaudio 5,000+ posts]

^ in a hatch back or suv with a good install yes....

 

[Kyle! 10+ year member]

But they are optimized for ported... you can go extremely small if you need to, 0.6 cubes is a good starting point each. Bigger is also fine.

Could I run 3 in a 1.0ft^2 or too small?