Yes, that was the inspiration. Although I left it on the foam core rather than removing with water.
Hey,
What do you guys think about applying a sound damping spray like this to the foam core board for vibration reduction?
DEI 050220 Boom Mat Spray-on : Amazon.com : Automotive
It seems like this combination would give many of the benefits of wood while maintaining the "easiness" of foam core. If anything, when my gf and I made a pair of mini cornus from foam core, the foam was vibrating quite a bit from the bass produced...
What do you guys think about applying a sound damping spray like this to the foam core board for vibration reduction?
DEI 050220 Boom Mat Spray-on : Amazon.com : Automotive
It seems like this combination would give many of the benefits of wood while maintaining the "easiness" of foam core. If anything, when my gf and I made a pair of mini cornus from foam core, the foam was vibrating quite a bit from the bass produced...
Beware. That automotive spray is petroleum based and may penetrate the paper covering and dissolve the foam.
I was wondering the same but somewhere in there they say it's better than those asphalt based ones, or words to that effect, and someone also said they sprayed on the inside of the their helmet onto the styrofoam and it worked just fine.
EDIT: Their website says it's VOC compliant so it's sounds rather mild.
EDIT: Their website says it's VOC compliant so it's sounds rather mild.
There are a bunch of similar products out there that claim to act similarly. I'm sure you could find one that will not destroy the foam. Thanks for the heads up though!
Edit: I just read that comment Cal, thanks for pointing that out! Maybe this spray is worth a shot.
Do you think that the spray would harm the acoustics of the cornu horns if applied to the inside of the channels? It should double as a great sealant!
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I would be happy about it's ability to damp the higher frequencies as it provides a rougher surface but I would want to make an allowance for the volume it will take up. Not sure about the sealing, might help but that wasn't an issue in my builds, I just used way too much glue.
Hey X, remember when we discussed Dollar Tree and Dollarama? Turns out Dollar Tree in Canada has taken over the Dollar Giant stores. Who knows where it will go but till now Dollarama had the Lions share with over 600 stores but we'll see what happens. They start with less than 100 locations but I'm guessing we'll see more pop up soon. I have a Dollarama a block and a half from home and the newly named Dollar Tree about 1 mile away.
Update on Foam Core Amp -sound clips
I have an update on the foam core amp teamed with the FH3i speakers I recorded some sound samples that you can hear in this post:
http://www.diyaudio.com/forums/class-d/219730-tpa3118d2-12.html#post3425164
I am starting on the build of the sibling TPA3116D2 amp (50 watts/ch at 0.1% THD) using a PCB this time. Progress of that build will be in the same thread as above.
I finished my foam core amplifier and ran it with my foam core micro-Cornu's. I guess this makes it the world's first foam core audio "system"? 🙂
I have an update on the foam core amp teamed with the FH3i speakers I recorded some sound samples that you can hear in this post:
http://www.diyaudio.com/forums/class-d/219730-tpa3118d2-12.html#post3425164
I am starting on the build of the sibling TPA3116D2 amp (50 watts/ch at 0.1% THD) using a PCB this time. Progress of that build will be in the same thread as above.
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Update to above post. Please use this link to get good mp3's.
http://www.diyaudio.com/forums/class-d/219730-tpa3118d2-12.html#post3425347
Sorry about that.
http://www.diyaudio.com/forums/class-d/219730-tpa3118d2-12.html#post3425347
Sorry about that.
I thought about doing a foam core amplifier but I don't think it would hold up to the heat from the rectifier and power tubes. 😀
mike
mike
Au contraire, if you use the phenolic (bakelite) foam with fire retardent paper face.... 😉
Did a home brew project last week that worked quite well. I had a bunch of leftovers from some auto body repair. I used two different fiberglass fabrics, the resin mix mashed and clamped between to pieces of aluminum (could also use smooth plywood) covered with old fashioned wax paper.
A little Bondo, some sandpaper, black spray paint and Voila! - Works as good as perf board. Not exactly foam board but strong, DIY and in my case, free 😀
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Nice work Bob. You know, if you wanted to make the board stiffer without adding weight, next time wrap the fiberglass around the foam core board to give it extra spacing to put the fiberglass farther away from the center of mass and this stiffens it a lot - like a surfboard. And it would be a heatproof amplifier foam core board.
My first Foam Core showing
We had some family come from out of town to visit yesterday and this is the first time anyone outside besides you folks in this forum has seen or heard my foam core creations. When they looked at the speakers and picked them up to feel how light they were they were quite incredulous that it would sound good. I showed them the new 'All Foam Core' audio system including the 30 watt/ch foam core amp paired with the Vifa-powered FH3i's. When I pushed 'play' on the CD carousel they were completely blown away by how good it sounded. They couldn't believe the bass coming from a 3.5 in driver, and the detail and imaging, if you have never experienced full range point sources - was understandably, impressive to the uninitiated. Anyhow, it was fun to 'surprise' people. 😀
We had some family come from out of town to visit yesterday and this is the first time anyone outside besides you folks in this forum has seen or heard my foam core creations. When they looked at the speakers and picked them up to feel how light they were they were quite incredulous that it would sound good. I showed them the new 'All Foam Core' audio system including the 30 watt/ch foam core amp paired with the Vifa-powered FH3i's. When I pushed 'play' on the CD carousel they were completely blown away by how good it sounded. They couldn't believe the bass coming from a 3.5 in driver, and the detail and imaging, if you have never experienced full range point sources - was understandably, impressive to the uninitiated. Anyhow, it was fun to 'surprise' people. 😀
That is what it is all about guys. Seeing their eyes light up when they hear what you have created.Most don't have a clue to terms like Qts, Fs Vas ot the other words in our audio soup, but they do know good sound when they hear it. Congratulations!