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First time building speakers |
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Ivar 
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Joined: 22 January 2017 Status: Offline Points: 12 |
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 Topic: First time building speakersPosted: 22 January 2017 at 10:23am |
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Hey guys,
I'm trying to make a few of these HD15 horns and we're doing it with recycled concreteplex (dunno if you call it like that in english?) from the street and before we began we filled up the holes from screws and stuff, my question is; should i paint the inside of the bin too in case the woodfiller is gonna crumble off or something? if yes, what kind of paint should i use? thanks
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JonB67
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Joined: 22 April 2016 Location: UK Status: Offline Points: 1376 |
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Posted: 01 February 2017 at 8:18am |
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Seeing as no one else had commented...
I've googled it and i think concreteplex is what we call phenolic ply. What type of filler are you using inside the box to be worried about it breaking up? If worried paint a little bit of pva or better still sbr (Styrene Butyl Rubber) over it to bond the top but you are better using a filler that's not going to degrade easily. |
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PavelP
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Joined: 25 March 2011 Location: Russia Status: Offline Points: 159 |
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Posted: 01 February 2017 at 12:40pm |
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Man you'll have a lot of problems glueing parts togather. It's very hard to find good adhesive for laminated surfaces. The only i know is silane adhesive but i'm no sure. For the first time it's better to use the simple ply + PVA.
Edited by PavelP - 01 February 2017 at 12:41pm |
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bob4
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Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1843 |
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Posted: 01 February 2017 at 6:10pm |
+1 is it this kind of stuff: ??? if so, you have to scrape off the black stuff anywhere you want to make a joint. Otherwise the glue will not join the boards. It needs to be wood on wood. Smells like a lot of work…. Painting the cabs might prove difficult too if you have the phenolic, and then surfaces without it, probably impossible to get a consistent finish, resulting in "ghetto" look (not that that is a bad thing, depends on what you want yourself?). the filler will be sufficient, putting paint on it will not really improve or worsen the airtightness (is that even a word??) good luck with the build!! |
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JonB67
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Posted: 01 February 2017 at 7:11pm |
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I've worked with phenolic a bit - not on speakers but other thingsCoarse sand the faces to get a good key where you want to glue and it'll bond ok. I've usually used polyurethane with it so can't say if pva based glues will be fine on it though.
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Ivar
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Posted: 02 February 2017 at 1:51pm |
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i really dont know wat went trough me when i thought to make speakers of that kind of wood, should've made a table from it or something :P
but anyways i allready started with it and will try to finish it as good as possible, so thanks for the tips and ill get on to it!
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Ivar
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Posted: 02 February 2017 at 2:01pm |
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I just used a pretty standard woodfiller ment for big holes, doesnt really name a type.
but as ive seen it dried out well now i dont think its gonna crumble off that fast. i think ill just hope for the best and for sure the next bins ill make will be from normal wood :P
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Ivar
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Posted: 02 February 2017 at 2:02pm |
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yeah thought so allready, but just some more sanding and screws should do it no? i hope
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PavelP
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Posted: 06 February 2017 at 9:58am |
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Use dowels 6-7 on a side and try to make all your joints airtight with silane adhesive. I strictly recommend you to use polyether putty like this
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Volnovod audio https://vk.com/kb_volnovod
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Ivar
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Posted: 06 February 2017 at 1:36pm |
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but i allready filled everything with a normal woodfiller, you think thats gonna crumble of or something?
and the silane adhesive? i can only find that in big buckets for glueing wooden floors, is that what you mean? |
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JonB67
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Posted: 06 February 2017 at 3:09pm |
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I think he means a hybrid polymer such as ever builds stixall or evo sticks "sticks like sh*t" I wondered about using a polyurethane sealant like sikaflex or puraflex. Not sure what the advantages of each might be.
I expect the filler you've used will be fine. Edited by JonB67 - 06 February 2017 at 3:09pm |
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Ivar
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Posted: 06 February 2017 at 10:50pm |
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oke thanks guys this will get me through it! i think i might just sand of the thin layer with a belt sander or maybe an electrical planer.
Other quick question; i found 4 secondhand PD152 drivers for 300 euro's, think thats a good deal or maybe you guys know a better deal somewhere? cant find the new-price in the internet for these. |
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PavelP wrote: