Mounting 77" G5 to plasterboard wall

koolpc · 28 Nov 2025 at 03:36

Definitely go with Corefix. They are superb. The metal sleeve makes it super strong. Made for the job. Have used them and nothing better...

ThundyCat · 29 Nov 2025 at 09:43

D-Ranged said:
I've just bankrupted myself after buying an LG G5 after contemplating a G4, since I bought this house, literally a year ago this weekend.

What I didn't realise, is the wall I was going to mount it too, and all the walls in fact, have a slight cavity with plasterboard, for what I can only assume is for insulation purposes.

Where I want the TV, the stud is running directly through the middle, so I should be able to get the middle bolts in that. Will it be ok to use the spring toggle bolts for the sides. From some googling, it seems that quite a few people have mounted it entirely with the spring mounts, but I'd rather have some peace of mind knowing it's on a stud.

I think the gap between the brick and the plasterboard is only around 2" maybe 4", so I maybe able to some sort of long plug and bolt into the brick work?

I don't really want to cut the wall to bits if I have to, and certainly don't want some plywood behind it, as it won't sit flush.

Any ideas greatly welcome!

Fix a strip of ply wood to the wall fixing into the stud. Then mount the bespoke bracket to the ply. I used a rectangular piece which was long enough to span the studs.

This is what it did on my 77 G4

Damnations Fury · 30 Nov 2025 at 10:22

If the gap isn’t too big for them, I’d use these https://corefixfixings.com/

Otherwise I used these for a 77” a few years back and I believe they are rated the best weight capacity. They’ve worked fantastically for me https://www.geefix.com/

These are also pretty good if the gap is too small for the above

Home - Bullfix Fixings

Bullfix Fixings are a revolutionary new way to hang heavy objects to plasterboard. Wings open wide behind Cavity and Dot and Dab walls.

bullfix-fixings.com

kaku · 30 Nov 2025 at 12:28

You say the cavity is 2" (maybe 4"), that's quite a big variance so it would be good to make some small holes and measure so you know for sure.

I personally used corefix to hang my TV on dot/dab plasterboard over block and it's rock solid, but the gap was only around 10-15mm or so for the sleeve to span. 4" is quite an ask

D-Ranged · 2 Dec 2025 at 10:25

Well it turns out there is no cavity on that part of the wall and it was just dot and dab, so it is secured nicely on the wall. Although it is a tad high for my liking. I am awaiting a new center speaker to arrive, so when it does I will lower it a bit.

hornetstinger · 2 Dec 2025 at 10:36

D-Ranged said:
Well it turns out there is no cavity on that part of the wall and it was just dot and dab, so it is secured nicely on the wall. Although it is a tad high for my liking. I am awaiting a new center speaker to arrive, so when it does I will lower it a bit.

Get the best matching center you can same brand as left/right.

D-Ranged · 2 Dec 2025 at 10:48

hornetstinger said:
Get the best matching center you can same brand as left/right.

I have monitor audio BX5 floor standers for L/R. I have just bought a MA silver c250 7g but the colour I wanted was out of stock so awaiting new stock. Then when I have some more free cash or a deal comes up, I'll get matching silver fronts

hornetstinger · 2 Dec 2025 at 10:50

D-Ranged said:
I have monitor audio BX5 floor standers for L/R. I have just bought a MA silver c250 7g but the colour I wanted was out of stock so awaiting new stock. Then when I have some more free cash or a deal comes up, I'll get matching silver fronts

Yeah i don't like the MTM designs good call on larger four driver center I use something similar

D-Ranged · 2 Dec 2025 at 10:57

hornetstinger said:
Yeah i don't like the MTM designs good call on larger four driver center I use something similar

For the price range I was looking at, it seemed to be the best option for a center and I am sure I will notice the difference going from my much smaller bx center.

I am not dead set on floor standers I could go bookshelf if I can mount them on the wall it's just what I ended up with on my first (current) setup which has to be about 8-10 years old now and I wasn't as clued up about home cinema systems so thought they'd be the best. I only use it for 99% movies and some gaming when I CBA to goto my desktop.