Revisiting the X-8 : New Thread

[sundownz]

Our prior unit had extensive supplier issues to the point where we've just had to write off all of that work and tooling.

In any event... I decided to re-visit the X-8 idea and base it on our SA-8 v.2 frame tooling.

The first challenge was to make a GREAT spider for a 2.5" coil on an 8" woofer... which is difficult and we used extensive software optimization before tooling. Fortunately our basket allows a spider about 10mm wider than pretty much all other 8" frames out there.

Since the spider is the main challenger we had that tooled first and then built up a test bed to test with :


* Former was too tall / big in diameter for the SA-8 dust cap to work so I had to use an SA-12 dust cap; which came all the way out to glue onto the surround edge.


* SA-12 Motor


* We had an adapter machined to mount the motor; I decided to have some extras made for some brave DIY folks that may want to make a similar project.


* There is the beastly new spider tooling -- this thing worked great !

Sundown X-8 Spider Test - YouTube

I was able to test the X-8 spider with an SA-12 motor / coil and SA-8 v.2 cone and surround. The X-8 will have it's own unique motor, cone, and surround for production. Those parts aren't done yet and I wanted to test the spider so we built it like this for now

I am very pleased with the spiders excursion capacity and linearity. I will get some Klippel measurements done on it soon as well to verify... my "push the cone Klippel" indicates that the spider has a very linear compliance to it for quite a bit of travel in both directions -- anxious to see the actual plots All of the computer optimization on this spider definitely paid off with the result.

[av83]

That's freaking sick....

[sundownz]

Once I get it in a box I will get some music videos -- our QC test track doesn't really reflect how it will actually sound. We just use it for this type of test as it has many varying frequencies and is pretty hard on any driver.

[macsdad]

That is bada55, price point considerations yet?

[Dtrom]

I will deffinately be giving these a try.

[timma100]

I can't wait! Thanks for the update!!!

[gckless]

If I was into 8's these would be up near the top for sure. Your new woofers that are yet to be released are lookin mighty fine!

[SPLaudio]

i did a couple sa8's with the sa12" motors but diff baskets. i did have one guy shredd a spider on one because with over 1k of power in a box over 1 cf net only lasted 4 months,lol.

looks like you got a nice spider to do the job

[SPLaudio]

crazy excursion in that vid bro how many mm dose that spider allow for travel?

[04murdalanche]

niceee, of course right after i buy my sa-8s lol

[sundownz]

crazy excursion in that vid bro how many mm dose that spider allow for travel?

Purely theoretical about 34mm one-way ; but in real life it is limited to more like 29-30mm or so.

The surround for the SA-8 v.2 isn't quite up to par for what the final X-8 motor can deliver either (and it's a big surround for an 8) -- so we are also tooling a bigger surround for it as well.

[Flastrongman]

mmmmmmmmm

[SPLaudio]

wow ur talking about 2.5" of throw on a 8"

[SPLluminator]

I have the need for this but am gonna buy a DD2508 if you don't hurry up!!!

[garretttt4]

I have the need for this but am gonna buy a DD2508 if you don't hurry up!!!

Be patient young grasshopper.