Upfront Posted December 31, 2016 Share Posted December 31, 2016 For my next idea how about next time your making a new mold eg for a huge bass horn how about casting so the upper 1/3 of the mold pulls out of the lower mold with the horn attached? You've lost me there mate. Can you reword it please? Link to comment Share on other sites More sharing options...
Nada Posted December 31, 2016 Share Posted December 31, 2016 3 minutes ago, Upfront said: .. Can you reword it please? imagine chopping the top third of the mold off just above the flare then reattach with a dowel so the mold is perfectly aligned but splits in two when the upper part is pulled up vertically when making the mold that could all be cast in now imagine youve finished layering up the horn which is becomes really well stuck onto the mold having shrunk with drying the horn will mainly adhere to the more vertical aspects of mold as it contracts ie the upper third so when you pull up the upper mold the horn follows releasing from the lower mold the final release should be easy by inverting the horn so the mouth is towards the ceiling, then gripping the horn around the narrow part and tapping the upper mold out against a bench more confused now? Link to comment Share on other sites More sharing options...
Upfront Posted December 31, 2016 Share Posted December 31, 2016 imagine chopping the top third of the mold off just above the flare then reattach with a dowel so the mold is perfectly aligned but splits in two when the upper part is pulled up vertically when making the mold that could all be cast in now imagine youve finished layering up the horn which is becomes really well stuck onto the mold having shrunk with drying the horn will mainly adhere to the more vertical aspects of mold as it contracts ie the upper third so when you pull up the upper mold the horn follows releasing from the lower mold the final release should be easy by inverting the horn so the mouth is towards the ceiling, then gripping the horn around the narrow part and tapping the upper mold out against a bench more confused now? Much less confused! Thanks for that! Quite sensible. Why couldn't you have suggested this before i started!!!Silicone next time I think in all seriousness. But then the mold would have cost me 150 bucks instead of 13 bucks. Link to comment Share on other sites More sharing options...
Eddierukiddingvarese Posted January 1, 2017 Share Posted January 1, 2017 20 hours ago, Upfront said: Looking forward to seeing it made. I like photos! Pic of the AR93's with top caps off, grill socks next. 1 Link to comment Share on other sites More sharing options...
Upfront Posted January 1, 2017 Share Posted January 1, 2017 The throat will be cut back to fit the 3" driver so dont mind the mess but as you can see, there is a lot of surface area to mount the plate and horn mount. 4 Link to comment Share on other sites More sharing options...
Upfront Posted January 1, 2017 Share Posted January 1, 2017 Pic of the AR93's with top caps off, grill socks next. What cloth did you decide on for the "socks" mate? And where did you source ot from? Link to comment Share on other sites More sharing options...
Guest Posted January 1, 2017 Share Posted January 1, 2017 1 hour ago, Upfront said: The throat will be cut back to fit the 3" driver so dont mind the mess but as you can see, there is a lot of surface area to mount the plate and horn mount. Exciting, almost ready to have a look inside of the horn. Seems to be plenty of thickness where it matters on the throat. Shouldn't ring or resonate at all. Nice work Mate. What about a wedge shape baffle for the mid ? Use 4 x 6" woofers. Link to comment Share on other sites More sharing options...
Eddierukiddingvarese Posted January 1, 2017 Share Posted January 1, 2017 (edited) 1 hour ago, Upfront said: What cloth did you decide on for the "socks" mate? And where did you source ot from? Needed 1300x 800mm for each speaker, so that dictated choice somewhat- selected Duratech from Jaycar in black, which comes in 1500x1000mm packs. It looks nice and have seen it on other speakers. Edited January 1, 2017 by Eddierukiddingvarese 1 Link to comment Share on other sites More sharing options...
Upfront Posted January 1, 2017 Share Posted January 1, 2017 Shouldn't ring or resonate at all. Nice work Mate. What about a wedge shape baffle for the mid ? Use 4 x 6" woofers. [emoji4] Your right about it resonating mate. Should be interesting. Its 7 "laps" of paper. I use the term laps because of the amount of overlapping with each layer. So 1 lap can be 2 or 3 layers depending on how tight you lay the strips together. So basically my 7 laps equals roughly 18 layers. As for drivers, I'm thinking simple Matt. One singe driver. As I said earlier, either Peerless 830869 or Dynaudio MW162. Thinking the Peerless is the go though.Anyone have other suggestions? Link to comment Share on other sites More sharing options...
Eddierukiddingvarese Posted January 1, 2017 Share Posted January 1, 2017 39 minutes ago, Eddierukiddingvarese said: Needed 1300x 800mm for each speaker, so that dictated choice somewhat- selected Duratech from Jaycar in black, which comes in 1500x1000mm packs. It looks nice and have seen it on other speakers. The AR93 VWUFSS- Very Wife UnFriendly Speaker Stands repainted. 1 Link to comment Share on other sites More sharing options...
Upfront Posted January 1, 2017 Share Posted January 1, 2017 The AR93 VWUFSS- Very Wife UnFriendly Speaker Stands repainted. Nice job mate. Hopefully the splash of black paint will help with approval from the department of domestic affairs. Link to comment Share on other sites More sharing options...
Eddierukiddingvarese Posted January 1, 2017 Share Posted January 1, 2017 1 minute ago, Upfront said: Nice job mate. Hopefully the splash of black paint will help with approval from the department of domestic affairs. The domestic dept thinks the paint job looks alright but not sure about them in the house under the speakers................ Link to comment Share on other sites More sharing options...
Upfront Posted January 1, 2017 Share Posted January 1, 2017 The domestic dept thinks the paint job looks alright but not sure about them in the house under the speakers................ Haha! Tell her there is less chance of dust gathering under them if they are in! Link to comment Share on other sites More sharing options...
Deano_malaysia Posted January 1, 2017 Share Posted January 1, 2017 The domestic dept thinks the paint job looks alright but not sure about them in the house under the speakers................ A pair of shoes always sways the decisionSent from my LG-H961N using Tapatalk 2 Link to comment Share on other sites More sharing options...
Upfront Posted January 1, 2017 Share Posted January 1, 2017 A pair of shoes always sways the decisionSent from my LG-H961N using Tapatalk Hand bags in my case Link to comment Share on other sites More sharing options...
Eddierukiddingvarese Posted January 1, 2017 Share Posted January 1, 2017 18 minutes ago, Upfront said: Haha! Tell her there is less chance of dust gathering under them if they are in! Keep them coming, all help gratefully accepted- dust good idea (Upfront) and shoes (Deano you guess the domestic dept's weak spot) 2 Link to comment Share on other sites More sharing options...
Eddierukiddingvarese Posted January 1, 2017 Share Posted January 1, 2017 1 minute ago, Upfront said: Hand bags in my case Dept does both but this is gunna be exy.......... 1 Link to comment Share on other sites More sharing options...
Swarm Posted January 1, 2017 Share Posted January 1, 2017 (edited) 19 hours ago, Upfront said: I used a generous amount of washing up liquid. Enough so the entire surface was covered but not enough to leave streaks on the surface. Hopefully enough. The mold was highly polished before the soap was applied. I used a heavy cut and polish till the surface was immaculate then a pure polishing compound. I read about the vaseline but didnt want the paper stained. Would have been much easier to remove if i had done though. A water or oil based lubricant wont do anything ? Edited January 1, 2017 by Swarm Link to comment Share on other sites More sharing options...
Upfront Posted January 1, 2017 Share Posted January 1, 2017 A water or oil based lubricant wont do anything ? Possibly. And I'm open too sugestions. Not exactly sure how well the dish soap will release. What were you thinking? Silicone spray? If so what do you take it off with to paint? Link to comment Share on other sites More sharing options...
Nada Posted January 1, 2017 Share Posted January 1, 2017 On 29/12/2016 at 7:51 PM, Upfront said: Music is the important part mate! Still havent decided on a mid bass driver. Peerless 830869 maybe? Or Dynaudio MW162 I imagine the mid-bass needs to keep up with the horn and have similar directivity? How about making a nice big mold for a nice big paper horn? Otherwise OB might work ? Link to comment Share on other sites More sharing options...
Swarm Posted January 1, 2017 Share Posted January 1, 2017 1 hour ago, Upfront said: Possibly. And I'm open too sugestions. Not exactly sure how well the dish soap will release. What were you thinking? Silicone spray? If so what do you take it off with to paint? Like personal lube. but i guess it would dry like detergent 1 Link to comment Share on other sites More sharing options...
bob_m_54 Posted January 1, 2017 Share Posted January 1, 2017 2 hours ago, Upfront said: Possibly. And I'm open too sugestions. Not exactly sure how well the dish soap will release. What were you thinking? Silicone spray? If so what do you take it off with to paint? Don't use silicone spray if you intend to paint it. It's almost impossible to remove from a smooth surface, and would be even worse on a surface that had any sort of texture. The spray painters where I worked hated the stuff with a passion. 1 Link to comment Share on other sites More sharing options...
Upfront Posted January 1, 2017 Share Posted January 1, 2017 Like personal lube. but i guess it would dry like detergent I didnt think of KY mate but I like where your mind is going with this! Link to comment Share on other sites More sharing options...
Upfront Posted January 1, 2017 Share Posted January 1, 2017 I imagine the mid-bass needs to keep up with the horn and have similar directivity? How about making a nice big mold for a nice big paper horn? Otherwise OB might work ? I'm trying to keep it small so it can sit on the bench in the shed. So horns for the bottom end are out but small OB could work good idea. Up untill now I've been thinking of a sealed box. But a box done my way! [emoji38] Link to comment Share on other sites More sharing options...
Swarm Posted January 1, 2017 Share Posted January 1, 2017 really cool little project where would one look something like this up ? Link to comment Share on other sites More sharing options...
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