Mid/Woofer 1st attempt

hifiside

Had to make a mounting plate.found out my coil is a 1/8” short now. So I had to use a twice as heavy coil.My 8” next to a Dayton HO 8”Distortion at 6” in a .75 cu.ft. Sealed enclosure Blue no x-over
Red with simple 2nd order
measurements in sealed box @ 15 inches

Mitchell_Cote

Cool

Wolf

Am I seeing that the 3rd order is higher from about 200-1k? Even so, it's not a high level and about -30dB. I'm also guessing you have an underhung coil there. Likely better than I or most of us could do, so this is pretty cool. Keep it up!

hifiside

Wolf said:

Am I seeing that the 3rd order is higher from about 200-1k? Even so, it's not a high level and about -30dB. I'm also guessing you have an underhung coil there. Likely better than I or most of us could do, so this is pretty cool. Keep it up!

Yes. Your seeing right. It’s a Overhung coil. Not much available for underhung.

jr@mac

This is pretty cool, bud. Will this make an appearance at Iowa, perchance?

hifiside

jr@mac said:

This is pretty cool, bud. Will this make an appearance at Iowa, perchance?

Not this one exactly. A improved version of this yes. This will probably be destroyed by end of the week to be rebuilt.

jr@mac

Man you are really stepping up DIY.

hifiside

From left to right
74gram dvc, copper coil on aluminum former.
34.5gram 6ohm, copper coil on kapton former 
23.5 gram 8ohm, aluminum coil on fiberglass former. I had these made for me from Precision Econowind. I didn’t get to use it because I didn’t add the spacer in. I ordered some different basket so they can be used.

dynamo

This is so frickin cool. I’m sure this is how companies like Acoustic Elegance got their start. Keep at it!

e6zion

Not to go too off track from this awesomeness, but didn't AE designs start out as Lambda Acoustics or something?  Also, I have two salvage 8in aluminum revelator woofers-- is it worth a frankenstein project with Audax aerogel cones?

I need to add that this is really, really cool.

Wolf

If you build it, Eric will come... and yes, AE was Lambda.

6thplanet

Did someone say Audax? ....and where did you aquire this cone?

hifiside

6thplanet said:

Did someone say Audax? ....and where did you aquire this cone?

These cones for the 8’s I found on eBay. 

6thplanet

I want them, will you part with them?

hifiside

6thplanet said:

I want them, will you part with them?

Sure I have 2 of those left.

Wolf

Hifi- the assumption might be that you have Aerogel cones. The reference was made in e6's post about the Aerogel cones. I have a feeling Eric thinks you have Aerogel cones. Is this the case?  They don't look like Aerogel in your photos.

6thplanet

I don't see a pic of them, he mentioned the possibility of an aerogel/revelator mash up.

hifiside

These are NOT Aerogel cones. And e6zion mentioned the mash up thing. Thanks for catching all that Wolf cause I didn’t. I thought he wanted to recone some audax speakers.

Gowa

What size VC?

hifiside

Gowa said:

What size VC?

2” if your asking me

6thplanet

So what did you mean by aerogel cone then?

e6zion

I am sorry. I evidently caused confusion and took away from this awesome post.  I mentioned that I have some damaged revelator woofers and 3x aerogel 8 in woofers (not loose cones) and wondered if it would be worth the enormous trouble to frankenstein them together.  Please focus on his great diy work.  If I decide to do something silly, I will make a new post.

6thplanet

Ah ha, I see. Well cool, good luck on the possible mash up ! ....and on with the show.

hifiside

Proto8 #3 because #2 was a f%*^}>g disaster.this time I used a poly cone and dust cap. Also took a 6ohm coil and unwound to a 4ohm. Used a different motor, stiffer spider. The top end is starting to come to life. 

hifiside

Graph 1 with crossover and tweeter
Graph 2 woofer Distortion 
Graph 3 woofer FR no x-over

Wolf

Nicely done!

hifiside

Working on #5

hifiside

Since poly is huge pain in the ass to glue great I made some plastic rings to sandwich the cone. Pre-assemble before glue.

Billet

That is some downright impressive craftsmanship.  The resulting graphs look great too, I like the smooth natural roll off.  I'd try running the woofers full range and just cross in a tweeter. 

hifiside

Billet said:

That is some downright impressive craftsmanship.  The resulting graphs look great too, I like the smooth natural roll off.  I'd try running the woofers full range and just cross in a tweeter. 

Somebody’s on to me.

hifiside

After machining 8 different plugs this is what I ended with. Lol.