fEARful part nine (9)

[BurningSkies]

Apparently this is more of an issue for people who are promoting the use of fiberglass than those of us who don't want to. Most of us just stated that we don't like the discomfort of using it. I don't think any of us think it will kill us or cause a serious illness. We just don't like handling it. Thanks. Move on.

 

[WCunha]

Apparently this is more of an issue for people who are promoting the use of fiberglass than those of us who don't want to. Most of us just stated that we don't like the discomfort of using it. I don't think any of us think it will kill us or cause a serious illness. We just don't like handling it. Thanks. Move on.

+1
I couldn't agree more.

 

[Interceptor]

Question: what size hardware are you guys using to secure the drivers?

 

[WCunha]

Question: what size hardware are you guys using to secure the drivers?

I believe Leland said to use 1" #8 recex screws with 1/2" ply and 1-1/2" if you put backing behind the 1/2" ply.

 

[Interceptor]

OK, those are interesting.

I was thinking in terms of a Allen headed bolt into a Hurricane nut. I've got a great hardware store just blocks from my office. Just going to have to see what they have.

Lunch is going to be fun Monday. Great hardware store and a chic store (Jo Anne Fabrics) in one day. Cool.

 

[Ol'Bass'ead]

And here I thought the world was going to end in 2012 anyway........

 

[lelandcrooks]

OK, those are interesting.

I was thinking in terms of a Allen headed bolt into a Hurricane nut. I've got a great hardware store just blocks from my office.

That is the best. It's what I supply with any heavy driver. But the neo's are so light that it's just unnecessary.

 

[WCunha]

Hey Leland how's it going with that high pass section? Do you have any pics yet?

 

[rpsands]

I just use recex screws from Leland.

 

[Foz]

Apparently this is more of an issue for people who are promoting the use of fiberglass than those of us who don't want to.

Yeah, physics would be so hard if it wasn't a popularity contest - BUT IT IS _ so move on!

Your Jedi mind tricks won't work on me young Skywalker.



====

I am very allergic

Well that's different. I hope you stay away from the stuff or at least try some of the new formaldehyde-free versions [these are usually white in color - allergies aint nothing to sniff at ].

I bet ya a doughnut its the old style the binder adhesive and/or accumulated dust that is the source of the problems you suffer from.

If you need links or even proprietary lab data on various choices of porous absorber materials let me know - it might help you match replacement materials in old cabs where necessary. While I have done some foundational work designing and testing such items I am ignorant about speaker design - the best I can do in this project is pass along material science information that may prove helpful to you speaker guys.

Time to pick some other poison, I guess.

Scotch?

 

[Passinwind]

Well that's different. I hope you stay away from the stuff or at least try some of the new formaldehyde-free versions [these are usually white in color - allergies aint nothing to sniff at ].

I bet ya a doughnut its the old style the binder adhesive and/or accumulated dust that is the source of the problems you suffer from.

If you need links or even proprietary lab data on various choices of porous absorber materials let me know - it might help you match replacement materials in old cabs where necessary. While I have done some foundational work designing and testing such items I am ignorant about speaker design - the best I can do in this project is pass along material science information that may prove helpful to you speaker guys.

Yes, dust is the primary culprit most likely, but chemical sensitivity is certainly possible too. I have no first hand experience with the newer batt formulations, but I think it's best that I keep it that way. I appreciate that offer Foz, but I am working on mentoring other people to do that sort of work at this point. Frankly, I'm much better at electronics bench work anyway, which is already plenty scary enough as far as health issues. And at last there are cabs on the horizon that I could just buy and probably be happy with.

I used to do sailboard repairs professionally and am dangerously close to becoming permanently sensitized to epoxy, which is way scarier than the simple allergies that have plagued me all my life. I could legitimately monger some real fear on that count in a highly informed fashion, trust me.The glass part is a walk in the park relatively speaking.

Anyhow, if fiberglass doesn't bother you, it does have some technical advantages. As always, there are many compromises to weigh up in anything to do with speaker building though.

Scotch?

Could be!

 

[3506string]

Hey guys just a heads up on the eighteen sound 6ND410, they are going for $130 a pair shipped at theaudioauction.com. He is selling them $20 more a pair on ebay under theaudioauction.

Can't beat 2 for less than the price of 1.

 

[yodedude2]

for those of you using a fearful 12 or 15/6 and a 12 or 15/sub, how do you stack them? i.e. ports next to each other, woofers next to either, sideways, some way i could never have envisioned, etc.??????? thanks, ron

 

[BurningSkies]

for those of you using a fearful 12 or 15/6 and a 12 or 15/sub, how do you stack them? i.e. ports next to each other, woofers next to either, sideways, some way i could never have envisioned, etc.??????? thanks, ron

Sub on the bottom, then I've been putting the 15/6 either upside down or right side up. Upside down I think will work better for small rooms and tight stages and right side up for larger spaces and stages where I'm further away from my rig.

 

[lelandcrooks]

Hey Leland how's it going with that high pass section? Do you have any pics yet?

Nada. I forgot my daughter had an opera this last weekend, so I didn't get anything done as far as work, spent the weekend out of town.

 

[m.oreilly]

just received my xover. thanks leland!

 

[yodedude2]

Sub on the bottom, then I've been putting the 15/6 either upside down or right side up. Upside down I think will work better for small rooms and tight stages and right side up for larger spaces and stages where I'm further away from my rig.

thanks for the idea. tight stages are my norm. so in this scenario, the woofers are as far apart vertically as possible in a stack.

 

[WCunha]

Nada. I forgot my daughter had an opera this last weekend, so I didn't get anything done as far as work, spent the weekend out of town.

Good for you. I hope you had fun.

 

[BurningSkies]

thanks for the idea. tight stages are my norm. so in this scenario, the woofers are as far apart vertically as possible in a stack.

Yes, but not specifically for that reason. The mid speaker with two stacked is right up in my ear and I hear more mid than is really representative out in the room. By moving it down, I can still hear it cleanly, but not overpoweringly. And as I've discovered as I walk away from the amp I'm still hearing what is 15 or 20+ feet out.

This way I'm not eqing too much of the mids out of my sound.

 

[Nachoooooooo]

Just picked up the GK 1001RBII for a steal and was wondering if anyone has wired their fEarful 3-way to utilize the 50 watt output to drive the horn. I have a feeling it might be less than optimal because the mid driver rolls off at 6k or so and the internal Xover for the GK is set at 5k, but, is there enough going on in that freq range to matter? Thanks in advance.
Ted