How do I mount a speaker / cut a circle in plexiglas?

Status
Not open for further replies.
shortbus= said:
One thing to watch is using '"super glues" with plexi, it will frost the surrounding plastic. Not sure about polycarbonate, never tried it.
Click to expand...

Polycarbonate is very sensitive to chemicals. Most polycarbonate parts are painted or "hard coated" like automotive headlights. You have to even be careful with the paint - solvents swell into polycarbonate, cause the plastic to crack, then the solvent evaporates out to leave an ugly bond. Be careful of the adhesives you use. Polyurethane adhesives tend to work well - especially 2k polyurethanes but check the adhesive manufacturers recommendation.

For acrylic, there are "solvent free" or foam safe epoxies that will not cause hazing on acrylics.
 
A speaker enclosure is supposed to be inert so it does not vibrate or resonate. Your plexiglas is so thin that it will vibrate and resonate which will color the sounds and sound odd.
 
audioguru said:
A speaker enclosure is supposed to be inert so it does not vibrate or resonate. Your plexiglas is so thin that it will vibrate and resonate which will color the sounds and sound odd.
Click to expand...

I'm guessing try amplitude will be quite low - like a little museum display intended to just be heard by 1-3 people looking at the collectibles. It won't sound too bad. On the other hand, I would likely pull some narrow-format speakers from a flat-screen TV and tuck them on the bottom edge so they are not so visible.
 
audioguru said:
A speaker enclosure is supposed to be inert so it does not vibrate or resonate. Your plexiglas is so thin that it will vibrate and resonate which will color the sounds and sound odd.
Click to expand...

Point taken. Please understand, however, that in this case, a low-fidelity recording from a low-fidelity recording of a 1940s radio broadcast (which I processed with whatever noise reduction filters (Audacity) that I could find need only be intelligible, which it is - that is not a problem. In fact, the remaining hisses and clicks are rather charming
 

Yep. It sounds *very* good, for what it is, using either of the speakers that I showed in the pics. I have played for a number of folks and all like it and some give me the usual...oh you should sell that.... None, however, say...hey make me one and I will make two enclosures for you....Nooooooooooo can't say that (and I am just kidding, it is not an offer).
 
audioguru said:
A speaker enclosure is supposed to be inert so it does not vibrate or resonate. Your plexiglas is so thin that it will vibrate and resonate which will color the sounds and sound odd.
Click to expand...

And none of that is of the slightest concern for it's intended use, and you are (as usual) greatly exaggerating the effects.
 
KeepItSimpleStupid said:
I knew that.

polycarbonate = Lexan
acrylic = Plexiglass
adhesive strip = band-aid
cotton swap = Q-tip
Click to expand...


Or, for a North American + European view...

Polycarbonate = Makrolon (formerly Bayer, now Covyestro), or Calibre (formerly Dow, now Trinseo) or Lexan (formerly GE, now Sabic).
Acrylic = Perspective or Plexiglas or Lucite
Adhesive bandages = URGO = Elastoplast = Band-aid
Cotton Swabs = Q-tips
 
I'll just call this the Beta version...


Thanks for the help and discussion on this. It does not yet meet my "vision", but it is something.
 
Status
Not open for further replies.

Similar threads

F
  • Question
Battery adapter to power bluetooth speaker?
Replies
12
Views
2K
fishyfool
F
R
  • Question
I need help with a push button...
Replies
11
Views
2K
ZipZapOuch
A
  • Question
A dual wifi in a single board for being inserted into PCI
Replies
3
Views
1K
abdulbadii
A
P
How to change a omron E5CN 220vac to a E5CN 24vdc
Replies
10
Views
1K
patrick-Belgium
P
J
  • Solved
Sharing A Speaker With An DY-SV19T For MP3 Files And ESP32 For Tone
Replies
10
Views
2K
_John_
J
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…