DIY Flat Panel Speaker Love

[Unbiasedsound]

Also, it seems like this would have been brought up by now (its impossible to read this entire thing) but just in case-- as any luthier will tell you, scoring and or sanding parts of the panel thinner will emphasize the modes flexing along those lines. Use to smooth out / taylor response. It's a more evolved version of simply putting weights on points.

Yes utilizing various thicknesses through out the panel can help to smooth out and taylor response....This is one of the methods I have learned from Bertagnis designs....its not really a more evolved version but a different method used to taylor response.....Bertagni's design also uses weights as well.

[Ronin]

Also, it seems like this would have been brought up by now (its impossible to read this entire thing) but just in case-- as any luthier will tell you, scoring and or sanding parts of the panel thinner will emphasize the modes flexing along those lines. Use to smooth out / taylor response. It's a more evolved version of simply putting weights on points.

[Ronin]

Hi all, new to the mega-thread. Will be making my own panels soon in conjunction w a subwoofer so mids and highs are most important to me.

[QUOTE=captainjack115;n1283173]

Sounds like that would work!
Having a hard shell surrounding an otherwise dampened material sounds ideal.
About 6 years ago I tried a thin gauge of aluminum, I then surrounded the exciter with a piece of extruded eps glued to the aluminum. The result was a nice sounding panel with good highs.
The bad news was a huge loss in sensitivity, thinner EPS backing didn't work either, although louder the resonance of the aluminum sheeting reared it's ugly head.
So far all materials tried for wide range have had a common denominator problem, namely edge mounting.

Captain: how much sensitivity are we talking? rough guess as to db/1m?
If anyone else want to 'chime' in on aluminum, or other atypical materials, please do so.

[panoramer]

Does someone have the Monacor placement configuration pdf downloaded? The link in this thread is inactive.

[panoramer]

This is how the JMC Soundboards look like from the back.

https://youtu.be/JlZKtY21S4U?t=27s this video shows some details during assembly. (German language). As you can see the Exciters are mounted on a teardrop shaped peace of ?? before they are mounted on the soundboard.

https://youtu.be/eF_rwi-vAjA?t=1m21s here you see another video this time french with more detail on the 8 exciters and some electronics.

Does anyone know what kind of electronics these might be?

The Soundboard is made of 4 mm Spruce. What if we use normal Spruce panel instead of tonewood quality Spruce?

Maybe it's possible to adapt some ideas to DIY projects