First BF Build: SLA Pros

[DavidMW]

Thanks for bringing up the plaster lath idea, David. I will have to see if I can find that locally.

While very inexpensive, $7 a sheet?, it is fairly flexible and could catch fabric, skin and other things. A local contractor gave me the idea. Another idea is "Hardware Cloth" about 1/2 inch square grid pattern, and cover it with speaker cloth. Maybe...

If that doesn't work I will be checking in with a local metalworker who does some amazing stuff welding. If he has any ideas I will be posting them!

David

[DavidMW]

Did some work in the last few days, mostly today....

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[Chris_Allen]

Full marks for doing the cut outs using a jigsaw - that's how all the best people do it

They are looking good.

[DavidMW]

Thanks Chris!

Never done a crossover before, wondering if this looks right before I solder?

piezo filter

My uncertainty is if pieces are too close together or anything. Looking at the picture I realize there are no labels!

Bottom left is to jack neutral and bottom right is jack positive. The resister to the top right is 4 ohm.

Thank you all!

david

[Jools4001]

From a connections point of view it looks OK. Spacing of components is not super critical, it's mostly the low pass and high pass inductors you need space between so that they don't interact; but with separate filters like you're doing that shouldn't be an issue. The only other consideration I applied was to make sure there was a bit of an air gap between the resistors to prevent any undue heat build up, but since the tweets draw very little current I don't imagine there is a big heating effect, I just played safe.

When you mount these to a scrap of ply, you could save yourself a bit of space in mounting the components. Your circuit topology is laid out in a literal version of the circuit diagram (which is fine) but once the components are electrically connected in the correct series/parallel config, as yours are, there is no reason why they need to be physically laid out like that; so you could arrange the components in a more compact pattern as long as the wiring between them doesn't change.

Remember to hot glue and cable wrap each component to the board to stop rattles.

[DavidMW]

Thanks Jools!

Well, i kept it quite literal. Next time though, I'm buying the completed crossovers from Leland. My abilities with soldering are minimal to none. Was up til three the other night soldering. I have better uses for my time!

I'll try to get a picture posted here soon. So close!

[DavidMW]

I have worked on the cabs, just busy in other ways. A quick picture for a question: 3 cabs are stuffed as shown but I am wondering do I need to put any polyfill on the inside of the front baffle? (The Alpha magnets will not be touching the polyfill)

cab stuffed

I did the stuffing before I added tops and bottoms, thought it would be much easier. That's next!

Thanks all!

[DavidMW]

Got all the tops and bottoms on, routed edges, filled and sanded, tweets screwed and caulked in. Woofers in one cab.

At Orchard Supply Hardware today, look what I found….

Kwikmesh comes in rolls, this one is 12 inches by 20 feet.

This could be a great speaker grill, very fine mesh, but I think it is open enough. not heavy. Thoughts??

Available at some Lowes and HomeDepots as well.

[DavidMW]

Bucked convention and stained these puppies. First coat was purple dye and then cherry stain and I got close to my desired result color wise: burgundy! Sadly my staining skills are not great and it isn't the most even job, but in darkened rooms I think they'll be fine. Worse case, I'll re-sand and duratex them!

I tried using Hardware cloth and then speaker cloth. Did not like the results. Grills ordered and received, will be attaching in the next few days. Pictures and details to come.

Initial tryout was simply amazing. No bass, but I knew that. Clear, clean and loud in spades though!!
T39's here I come!

[67baja]

Seems you missed the March 1st deadline - LOL. I didn't see it in the thread anywhere, what woofers are you using?

[DavidMW]

Seems you missed the March 1st deadline - LOL. I didn't see it in the thread anywhere, what woofers are you using?

LOL indeed

for March 1, I cobbled together two different systems and the group said it was great sound. I told them next year would be far superior!

Woofers are the Eminence Alpha 6a.

i did get 3 grills on, loving the look but no picture yet. I hope to get some thin black foam to provide a bit of dust protection, but if not, they look and sound great!

FWIW, 36.2 pounds, with grills.

[67baja]

For the foam, go to the hardware store and get room air conditioner air filters. Not the whole house filters, the through the wall type air conditioner filters.

[DavidMW]

For the foam, go to the hardware store and get room air conditioner air filters.

Yeah, I checked at our local Ace. 15" by 24", 4 inches shy. Will go to a fabric or foam store in the next few days…

updated pics….

Need to paint the screw heads black.

I got the grills from spkrparts!-2007 on Ebay for $84 for all 4 including shipping. They were all flat, packaged well, very happy.

[Bruce Weldy]

Yeah, I checked at our local Ace. 15" by 24", 4 inches shy. Will go to a fabric or foam store in the next few days…

I spliced it together when I built the WH10s. Tape it on the backside, spray the back of the grill with adhesive, then lay it on there. Put a piece of plywood big enough to cover the whole thing on it and put weight on top.

See the bottom of the first page of this thread..

http://billfitzmaurice.info/forum/viewt ... 0&start=15

[DavidMW]

I spliced it together when I built the WH10s. Tape it on the backside, spray the back of the grill with adhesive, then lay it on there. Put a piece of plywood big enough to cover the whole thing on it and put weight on top.

See the bottom of the first page of this thread..

http://billfitzmaurice.info/forum/viewt ... 0&start=15

So, you actually glued the foam to the back of the grill? Hmmm. Wasn't going to do that in case of deterioration and ease of replacement. If I can't find larger pieces at the fabric / craft store, I may just do that!

Did you use spray on Contact Cement for that? TIA