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Multi-Way Conventional loudspeakers with crossovers

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Old 9th April 2018, 03:46 PM   #371
nc535 is offline nc535
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that sounds more like an epoxy than a putty it will work but it may be harder to work with. the trick with these two part things is not to use too much of the hardener. If you do, then it will set so quickly you won't have time to shape it.

The plumber's putty OTOH never hardens; it can always be reworked. that's both its blessing and its curse
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Old 9th April 2018, 06:54 PM   #372
bwaslo is offline bwaslo  United States
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This is the water putty --
Durham's Rock Hard Water Putty

Neat stuff, the 2nd part is water. You keep adding water or powder until you get a workable consistency, then start packing it in. It sets in several minutes, then it is essentially a rock. I once thought about using it to mold waveguides.
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Old 9th April 2018, 07:13 PM   #373
3ll3d00d is offline 3ll3d00d  United Kingdom
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Quote:
Originally Posted by nc535 View Post
that sounds more like an epoxy than a putty it will work but it may be harder to work with. the trick with these two part things is not to use too much of the hardener. If you do, then it will set so quickly you won't have time to shape it.

The plumber's putty OTOH never hardens; it can always be reworked. that's both its blessing and its curse
milliput seems to be widely used for modelling & sculpting and reportedly has a more clay like consistency which is workable for a decent period of time. I'll find out soon enough anyway.
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Old 9th April 2018, 11:44 PM   #374
phivates is online now phivates  United States
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Definitely pick an epoxy putty with longer open time. 20 minutes goes by in 10...
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Old 15th April 2018, 11:09 AM   #375
3ll3d00d is offline 3ll3d00d  United Kingdom
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milliput seems to work well (at getting it on at least) and it certainly remains malleable for quite a while (with a wet finger to help), now to wait and see how it hardens

millput_ss.png
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Old 16th April 2018, 02:23 AM   #376
bwaslo is offline bwaslo  United States
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you're going to want to fill that cavity in to the surface of the wood mount (with about 1" paths to the ports) -- too much front volume (assuming you're using the TF0410MR midrange)
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File Type: png Compression Chamber.png (160.4 KB, 288 views)
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Old 16th April 2018, 07:05 AM   #377
3ll3d00d is offline 3ll3d00d  United Kingdom
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I added that as well, it has dried rock hard but was easy to mould. I can see why this stuff is used for sculpting.

millput_ss.png
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Old 16th April 2018, 08:54 PM   #378
3ll3d00d is offline 3ll3d00d  United Kingdom
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I got the drivers mounted on the horn and plan to take some (no XO) measurements this weekend. I have measured Z on the horn already. Do you have any pics of that data from your original design? It would be nice to cross check against that as I guess that is the best way to tell the way the drivers are mounted is good.
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Old 17th April 2018, 02:57 AM   #379
bwaslo is offline bwaslo  United States
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Ok, dug these out. The midrange impedance:
SS mid Z.png

The HF impdedance:
SS HF Z.png
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Old 17th April 2018, 07:46 AM   #380
3ll3d00d is offline 3ll3d00d  United Kingdom
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thanks, mine look similar to me so I suppose that's a good sign

mid.png

cd.png
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