DIY Flat Panel Speaker Love

[Unbiasedsound]

What measurements?

[pixelphoto]

I just made panels measureing 12" X 24". Please help this math handicapped one with the measurements for exciter placement.

[Unbiasedsound]

Yes....I have used both sides with glue before but just as long as the surface contact area is smooth/clean the sticky adhesive works really well.

[allenb]

Do you utilize the adhesive on that side and use pva on the non-adhesive side?

[Unbiasedsound]

I dont think so but I am not totally sure. The Frost King foam I use only has one side that has the sticky adhesive.

[allenb]

Do you know if frost king makes a foam weather stripping in the size you mentioned without adhesive on either side. Was thinking it would be easier to install and for the pva glue to adhere to the foam weather stripping alone.

[Unbiasedsound]

PVA wood glue like Tightbond or Elmers

[allenb]

Understood and makes sense. What have you found is best to use for gluing the foam to frame and panel?

[Unbiasedsound]

The compression does not need to be that high it just has to fit smug enough so that the panel does not fall out of the frame when placed upside down. Plus you have to glue both ends of the foam one to the panel and the other side to the frame.

[allenb]

Ok, understood. The foam pressed into the gap is the only force keeping the panel centered within the frame and must have enough force to prevent the panel from eventually relocating itself in or out of center in relation to the foam surround due to vibration.

So, with that said, with the 3/16" foam thickness you use for your surround, how much less is the gap you utilize (less than 3/16") so I can get an idea of how much the foam will compress to ensure I have enough holding force to prevent the panel from moving in or out of the frame due to normal vibration? Would a 1/8" gap between frame and EPS panel allow enough compression when inserting the 3/16" foam in the gap?

[Unbiasedsound]

Found a better pic. This new version of Bertagni speakers use the foam surround all around the sides of the panel the same way I do it.

[Unbiasedsound]

Its hard to explain but its similar to this pic >

[allenb]

The way I do it is the foam goes inbetween the gap between the frame and the panel sides (thickness).

Ok after much thought on this, this will be the method I experiment with. A question on how you do your frame with this in mind. Does your frame sandwich the area where the foam resides in the gap and a little of the first bit of panel or is the foam surround and all of the panel free floating with the only locating force keeping the panel centered on the surround being the pressure of the surround exerted on the edge of the panel?

[Unbiasedsound]

No, but I am not saying you cant use it that way as like I said before in my other post that there are many ways you can mount the eps panel to the frame with the frostking foam as there is no really right or wrong way just personal preference.

The way I do it is the foam goes inbetween the gap between the frame and the panel sides (thickness).

[allenb]

Ok, I'm having a complete block and not able to envision how the foam surround is existing in relation to the frame and the panel. Let me give you a verbal visual example of what I thought was the layout.

Suppose we have a 9" x 14" x 1/2" panel laying on a table. Next to one edge of it we have a 1/2" thick x 2" wide by 9" long board laying adjacent to the 9" wide end of the panel. Now, we lay our adhesive backed foam surround down on top of the two pieces with half of the width of the adhesive foam surround laying down one edge of the panel and the other half laying down the length of the board. The board being one member of the frame. In this layout, the foam bridges the frame and the panel with a small gap in between the two.

Is this how you are intending the foam surround to be used?