SA-8 Prototype Is Here !

[DonH 5,000+ posts]

Lots of people asking about mounting specs :
5.25" depth

8.25" overall basket OD (no gasket)

7.25" cut-out diameter

6.25" magnet diameter

mark me down for 4! //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif:laugh://content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

just letting you know i will be the first to buy once pre-sale opens!

 

[85_blazer 10+ year member]

Just a guess, these might like around 1 - 1.25 cubic feet a piece tuned awround 33, obviously higher tuning would mean more SPL.

i hope so been waiting of for these for ever it seems and it just so happens i got 1.25 cubes at 33 hz two of these and a sae 1200 should sound nice

 

[sundownz Pro Seller]

0.6 - 1 cube each should work quite well //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[FJF 10+ year member]

Freshly measured specs, should break in a bit (CMS should be 100 uM/N):
FS: 41.6 Hz

Qes: 0.513

Qms: 6.60

Qts: 0.476

Vas: 3.28 L

BL: 17.14

Cms: 83.34 uM/N

Mms: 175 g

Sensitivity @ 4 Ohms and the approximate weight of the driver?

 

[sundownz Pro Seller]

Sensitivity is *low* on this driver - 78 dB - as it is designed to have lots of low-end output in a TINY box. See Hoffmans Iron Law "You can have low end extension, high efficiency, or small enclosure size. Pick two."

http://www.soundsolutionsaudio.com/forum/index.php?/topic/7115-hoffmans-iron-law/

Of course, as you may know, sensitivity is a very low importance spec for a real SUB woofer //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

PS: The driver weighs 20 lbs.

 

[FJF 10+ year member]

Sensitivity is *low* on this driver - 78 dB - as it is designed to have lots of low-end output in a TINY box. See Hoffmans Iron Law "You can have low end extension, high efficiency, or small enclosure size. Pick two."
http://www.soundsolutionsaudio.com/forum/index.php?/topic/7115-hoffmans-iron-law/

Of course, as you may know, sensitivity is a very low importance spec for a real SUB woofer //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Thanks, this driver won't work for the project. I appreciate the reply.

 

[sundownz Pro Seller]

Thanks, not for me.

I will provide actual power to SPL output figures as well once testing starts - I bet you will be surprised //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

The E8 was in the 79 dB range for sensitivity and performed VERY well on 200 RMS.

Although, if you aren't going ported this driver probably isn't the best choice either.

 

[FJF 10+ year member]

I will provide actual power to SPL output figures as well once testing starts - I bet you will be surprised //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
The E8 was in the 79 dB range for sensitivity and performed VERY well on 200 RMS.

Although, if you aren't going ported this driver probably isn't the best choice either.

Ever under the best circumstances, the 20lb weight kills the driver's viability. It would be going into a weight-sensitive, high-performance automobile. The first sub weighed 33lbs w/enclosure; the current sub tips the scales at 24lbs (w/enclosure).

 

[sundownz Pro Seller]

Ever under the best circumstances, the 20lb weight kills the driver's viability. It would be going into a weight-sensitive, high-performance automobile. The first sub weighed 33lbs w/enclosure; the current sub tips the scales at 24lbs (w/enclosure).

Gotcha //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[sundownz Pro Seller]

**** bro that a nice lookin lil sub!
copper or alum coil?

Copper / 4-layer round -- black alum former w/ kapton tab as well.

 

[sundownz Pro Seller]

Derrick will be up this week (most likely) and we will be making a 1.75 cube SPL box tuned to ~45 Hz w/ single 6" aero for a pair to try out in the Jeep.

 

[jmanpc 5,000+ posts]

Coil rock ? *laughs*
Nah... the dot is not perfectly centered so it looks like it's jumping around.

Um, no. If the dot weren't centered, it'd still be moving in a up and down. It's pretty much making a star at the beginning of the video. I am aware that the camera is moving, but even before it pans down, you can see gratuitous horizontal movement.

 

[ltr450racer690 10+ year member]

any chance you will have a trade in program for the old 8's for the new one?

just a ?

 

[mbrooky 10+ year member]

man i want four of these! anyone want to buy my 3 e8s //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[d-REW 10+ year member]

sub is a beast.