I need them for a concrete wall. is their any problem ? what's the depth of the hole I need to make ?
1041759
I wouldn't recommend a concrete wall with these. They need a hollow space to deliver sound, so a solid wall won't work. Depth wise you are looking at 3 or 3.5 inches. These also mount by clamping to drywall. You would need to work that out too. Best bet would be to create a box for the speaker and mount that to the wall.
1041760
I think you have many challenges with installing the Polk RC65i into a concrete wall. Overall dimensions (w x h x d) are 8 5/8" x 12 1/6" x 2 7/8". The RC65i requires a 1/2" or 5/8" drywall to mount effectively. If you have drywall over the top of your concrete wall, then this should work (although running the speaker wiring presents its own challenge). The opening in the concrete wall will be larger than the drywall (yet another challenge). I think I would look at a excellent Polk mini-speaker and surface mount that speaker versus tackling the "in ceiling speaker in a concrete wall challenge". But - if you make it work, post your solution to the community as I'm sure they would appreciate the how-to knowledge. I think you have many challenges with installing the Polk RC65i into a concrete wall. Overall dimensions (w x h x d) are 8 5/8" x 12 1/6" x 2 7/8". The RC65i requires a 1/2" or 5/8" drywall to mount effectively. If you have drywall over the top of your concrete wall, then this should work (although running the speaker wiring presents its own challenge). The opening in the concrete wall will be larger than the drywall (yet another challenge). I think I would look at a excellent Polk mini-speaker and surface mount that speaker versus tackling the "in ceiling... » Read More I think you have many challenges with installing the Polk RC65i into a concrete wall. Overall dimensions (w x h x d) are 8 5/8" x 12 1/6" x 2 7/8". The RC65i requires a 1/2" or 5/8" drywall to mount effectively. If you have drywall over the top of your concrete wall, then this should work (although running the speaker wiring presents its own challenge). The opening in the concrete wall will be larger than the drywall (yet another challenge). I think I would look at a excellent Polk mini-speaker and surface mount that speaker versus tackling the "in ceiling speaker in a concrete wall challenge". But - if you make it work, post your solution to the community as I'm sure they would appreciate the how-to knowledge. « Show Less
2149509
Absolutely not! These are for metal or wood. You need to look at Masonry Drill Bits for use in concrete drilling. Those drill bits are carbide tipped and the drilling tip is configured to better withstand the abrasiveness of the concrete.
391135
They are quite large, I used wall-mount clamping brackets and blu-tack adhesive. There are no pre-drilled holes in the back, presumably due to the size.
1382044
Hi, I sent these back because there was no hole or anything to hang them up with. I bought these for my sons posters and I bought Velcro removable poster stickers instead. I got them right here on Amazon and the posters are still up. Check them out. Hope this helps.
643405
they don't come with screws. depends on if you are attaching them to wood or concrete wall. you will need to supply your own screws.
1208531
Yes, I have not installed them yet but have verified the sizes. I would like to point out the wall mounted application requires access to the back side of the wall to adjust the depth.
1666771
Hi! I own these, but I installed with hollow wall anchors into drywall. I feel you in regards to plastic inserts into concrete, NOT the way to go ! Get wedge type anchors from Menards, Home Depot, LOWE'S, etc. if memory serves correctly, the mounting holes are only about 5/16, so 4 small concrete anchors would be more than enough to hold up a speaker. The anchors won't need to be more than 1.5 inches long. Hope this helps!Loni S HowardHoward Productions, LLC
612523
Distance between holes (width) is ~ 1 7/8" should be wide enough. The depth is about 7 1/2"
445473
The holesare at least 5/16. they may accomodate 3/8. 1/4 inch would be too sloppy.
101274
If you use expandable anchors, they will work fine. These have a coarse thread - probably the hardest thing will be to drill the holes.
1078885
Hello, I believe you could install this on a concrete wall with masonry screws. The holes are 1/4" in diameter. Hope this helps.
1612591
Not to burst anybody's bubble, but I would NOT recommend making holes in your siding. You run the risk of getting moisture back in there which over the long haul can damage the infrastructure of your house, necessitating very costly repairs.Find somewhere else to hang these.
632804
I used a hollow wall anchor in my drywall.It was this style:http://www.amazon.com/Short-Hollow-Drive-Anchor-pieces/dp/B004S6NOFK/ref=sr_1_7?ie=UTF8&qid;=1366984780&sr;=8-7&keywords;=hollow+wall+anchorJust make sure you get the correct size for your wall thickness. They should be available at your local hardware store. Also, they say no drilling is required, i still drill a hole so that you don't damage the drywall. I believe i used a 1/4" drill bit to drill the pilot hole. just as long as the hole is not larger than the anchor itself.
1571803
mine is in a block wall and the hole size is approx. 11 inches wide, hard to measure exactly. hope that helps.
1692101
You need to use anchors that expand when you put them into the hole you drill. They will lock in when you bolt them down.
1279764
Check the diameter size of the hole. If they're the same (they should be) it will work. Can't live with these if you do much woodworking.
530148
Not with the bolts that are supplied. The hardware that comes with this product require you to have access to the front and backside of whatever wall you are putting them on. But maybe check with a hardware store to see other options for ways to secure them into concrete.