LSIf/x mounting options.......

shawn474

I have put together my lsi system. Got the 9's for the front, the lsi c for center channel and the lsi f/X's for the rear. I am going to calibrate the system tomorrow. However, due to my room set up I can't mount the f/X's on the back wall(it's an in wall bookcase) or the side wall (windows). I have btech mounts for the fx300i' s that served as surround duty before getting these. But the f/X's are HUGE. How would you all suggest I mount them? I can't put them on stands because the sectional sofa takes the specs. I am wondering if I can get longer bolts and use the btech's. If I could get longer bolts, I could use the mounts and just clamp them down as much as possible and zip tie the speakers to hold them on the mount as well. Thoughts?

Thanks in advance, Shawn

maximillian

According to Polk's specs, the LSiFx's are 24 lbs each wheres as the fx300i are 25 lbs for the pair. I can't confirm as I have never owned the fx300i's. But I have this exact same setup and know that the LSi's are rather heavy. I mounted to the wall since most mounts were meant to hold smaller and lighter speakers. Besides making sure that the linkage to the wall is secure enough, you have to make sure that the bracket is also secure (through whatever joints) and many brackets simply are not.

"Skinny" floor stands will probably not support the weight, and they are typically meant to have the weight transferred to the center of the floor support so couldn't be pushed up against the wall. However, can you make a custom mount out of wood that goes to the floor behind your couch? It could be an off-axis floor stand so the weight transfers to the floor, but then you can bolt the stand directly to the wall since it would not be able to stand on its own. The stand's column would only need to be 1-2 inches in diameter so it shouldn't push the couch too far away from the wall.

shawn474

Yeah I was surprised at how big these speakers actually are. They're huge. And heavy. I may have to fabricate something to work. I might try to go to Home Depot and get longer screws to fit the threads of the existing clamps. I think if I can get a long enough screw and zip tie the rear it will hold just fine. I did the same type of mounting with the rt55's which were as heavy but not as wide. I am not really worried about the weight as the mounts have proven to hold heavier - I think they're rated for 55 pounds. Just need to figure out the clamp modification to see if I can get it to fir the width.

EndersShadow

Shawn, any chance you can put the LSi F/X's IN the bookcase on the shelves? Or if nothing else use the dividers to hold a 2x4 that you then mount the speaker too?

Here is a HORRIBLY drawn picture...

Attachment not found.

shawn474

Might be an idea there! Thanks......

EndersShadow

shawn474 wrote: »

Might be an idea there! Thanks......

Otherwise I would say your thought about the mounts might work. Another thought is to turn them 90 degrees so the sideplates are grabbing the back and front of the LSi F/x. It would look a bit funny, but you should be able to get a good grip on them that way, but the weight will be off kilter.

If your going to do that I would add extra gasket stuff to the sides (think Armalex) so you can really tighten em down w/o scratching the glossy finish on the front.

shawn474

EndersShadow wrote: »

Otherwise I would say your thought about the mounts might work. Another thought is to turn them 90 degrees so the sideplates are grabbing the back and front of the LSi F/x. It would look a bit funny, but you should be able to get a good grip on them that way, but the weight will be off kilter.

If your going to do that I would add extra gasket stuff to the sides (think Armalex) so you can really tighten em down w/o scratching the glossy finish on the front.

Another great idea. Thanks again.

shawn474

EndersShadow wrote: »

Another thought is to turn them 90 degrees so the sideplates are grabbing the back and front of the LSi F/x.

THIS!!!! Thanks so much for the idea. It works perfectly. And actually doesn't look weird at all. The clamping bracket fits exactly to the size the piano gloss between each grill on the FX's. Very happy that I don't have to fabricate anything and that I don't have to spend money on new mounts.
Thanks for all the advice,
Shawn

EndersShadow

shawn474 wrote: »

THIS!!!! Thanks so much for the idea. It works perfectly. And actually doesn't look weird at all. The clamping bracket fits exactly to the size the piano gloss between each grill on the FX's. Very happy that I don't have to fabricate anything and that I don't have to spend money on new mounts.
Thanks for all the advice,
Shawn

Yeah, they are kinda big hoss's hehehe... but I dont think I could go back to anything else for my side surrounds. I am glad I snagged a set of LSi 7's for my rear surrounds, I just hope the house we end up buying allows me to use them rather than in ceiling.

Glad it worked and saved you some money.

Only thing I can see it, how high are they mounted? The "ideal" mounting is like 24-36" above your ears when seated. Not that you want to mess with moving anything around at this point lol.

shawn474

EndersShadow wrote: »

Yeah, they are kinda big hoss's hehehe... but I dont think I could go back to anything else for my side surrounds. I am glad I snagged a set of LSi 7's for my rear surrounds, I just hope the house we end up buying allows me to use them rather than in ceiling.

Glad it worked and saved you some money.

Only thing I can see it, how high are they mounted? The "ideal" mounting is like 24-36" above your ears when seated. Not that you want to mess with moving anything around at this point lol.

The couch is right below the speakers; they are no more than 18-20" above ear height in seating position

EndersShadow

shawn474 wrote: »

The couch is right below the speakers; they are no more than 18-20" above ear height in seating position

Gotcha. Should work great then. Not "ideal" but you they dont build rooms in houses to THX spec's by default for some reason .