basshead Posted January 4, 2023 Posted January 4, 2023 (edited) Howdy, I’m in the process of building my first HT setup and have acquired a pair of in-ceiling speakers (thanks @BRS). I’ve built enclosures so they’re suitably angled towards the listener without protruding below the ceiling. My dilemma now is how to finish the underside. Ideally I would like surface-mount grilles, and wondered if the regular speaker grille “plugs” would be able to support the weight (being horizontal as opposed to vertical like normal floor-standing speakers). Grille size is approx 500x400mm (allowing for 50mm extra each side; the enclosures are designed to fit through the opening in the ceiling, hence the large grille size). Another idea was magnets so they attract to the metal furring channel, but again I don’t know if any magnets would be strong enough to hold the weight (also though 10mm gyprock). Another idea is to flush-mount by using pvc edge moulding (like this https://www.blacktownbuildingsupplies.com.au/product/pvc-end-cap-mould-4-5mm-x-3-0m/) to “frame” the opening, and use small right angle brackets affixed to the inside edges of the enclosures to secure the grille to (eg. using the speaker grille “plugs”) Here’s an in-progress photo of one of the enclosures… I actually built one out of gyprock first, but the plywood one was much lighter (and obviously stronger, and quicker to build). Enclosure size was limited by the spacing between the furring channel but I could’ve made them a little wider to prevent the direct sound wave from the mid cone being partially blocked by the front (back?) of the enclosure. I’ve got some scrap white semi-sheer fabric I’ll try out as the grille cloth. Edited January 4, 2023 by basshead
BRS Posted January 6, 2023 Posted January 6, 2023 Is it possible to look at metal speaker grill mesh? Maybe you could fix the mesh with screws to the enclosure and create a lip so it protrudes out and down from the enclosure 10mm so it's flush with the gyprock.
PhooBar Posted January 6, 2023 Posted January 6, 2023 (edited) I would go with the white cloth. Cheap, cheerful & unobtrusive. Now that I think about it, you could run counter-sunk screws with large washers on both sides of the ceiling, and glue neodymium coin magnets onto your grille frame. Six or eight magnets should hold the grille up, easily. Edited January 6, 2023 by PhooBar 1
basshead Posted January 6, 2023 Author Posted January 6, 2023 (edited) I like the magnets idea rather than the grille plugs/clips. I think they probably should have some material between the magnets (or magnets and metal) so the grilles aren’t impossible to remove. The magnets I found on eBay are 15mm diameter and 5mm thick and have a countersunk hole. Having the grille surface-mounted instead of recessed should make it easier to remove (without damaging it in the process). Edited January 6, 2023 by basshead 2
ThirdDrawerDown Posted January 14, 2023 Posted January 14, 2023 After buying such magnets on ebay from China I later found them in Bunnings, to my surprise.
basshead Posted January 14, 2023 Author Posted January 14, 2023 On 14/01/2023 at 12:29 AM, ThirdDrawerDown said: After buying such magnets on ebay from China I later found them in Bunnings, to my surprise. Expand Wow I wasn’t expecting to find them at Bunnings. I searched their website and they have quite a selection. And I’m still waiting for the eBay ones I ordered over a week ago to be posted….
PhooBar Posted January 14, 2023 Posted January 14, 2023 On 14/01/2023 at 2:57 AM, basshead said: Wow I wasn’t expecting to find them at Bunnings. I searched their website and they have quite a selection. And I’m still waiting for the eBay ones I ordered over a week ago to be posted…. Expand Just be gentle screwing them down. Neodymiums are easy to crack. 1
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