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June 1, 2008 - 8:15am
#1
Have you guys heard of "multi-cone type loudspeaker"?
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looking at the image and skimming the text of the patent, seems your Dad's invention is not the same as this, but I recently bought a portable instrument speaker cabinet:
http://www.gollihurmusic.com/product/1197-EUPHONIC_AUDIO_WIZZY_12_SPEAKER_CABINET.html
Seems the general idea of multiple cone speakers is used in the example above, supposedly to increase frequency response.
Interesting- did he make any working prototypes to test his idea out?
Hey ttt, thanks for the link
I ran into another product in that page called
"Wizzy 500 Combo Amp " and it explicitly advertises that:
I also agree that the idea of utilizing multi-cone (dual cone) to produce sound is strikingly similar as my dad's invention...I don't know up to what extent his patent has effect but I should look into this more and talk to my dad about this.
Thank you so much for the info!
yeah, I remember as a kid he had couple of prototypes which he would occassionally listen to.
They weren't so pretty looking but they sure sounded awesome
After moving to the States we had to leave them but I believe they are still catching dust in our relative's house.
Not a new idea here. Back in the 50's and 60's, there were many dual-cone or whizzer speakers on the market.
Your Dad's design looks, to me, more akin to an isobaric design, although he uses one motor and isobarics are usually stacks of individually-driven speakers.
Kal
Kal, I apologize for my ignorance in this field
Here is my dad's response:
I made a simple diagram comparing Isobaric vs. MCTL design:
Thanks,
Lord Kelvin