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#1
Posted to alt.electronics
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Flat speaker...
Greetings again. I am cleaning up my shop for a move, and in packing up
some speakers I came across some interesting ones. These are your normal cone speakers, albeit smaller, ranging from about 1-1/4'' to 2'' in diameter. Quite interesting little buggers these are, miniature versions of the larger, black paper cones. Interesting enough? Well I came across a few more that had flatter magnets inset into the cone such that there was minimal protrusion outward from the back of the cone. While most of the small speakers that I come across have magnets about 5/8'' to 1'' deep on back of the cone, the most these extended was 1/8''!!! These speakers do work quite well, with ratings up to one half watt, and I must say the frequency response is quite satisfactory for general radio reception. I have to wonder, with such a marvel of mechanical engineering as these speakers are, it remains a mystery to me that they are so uncommon. Ernie |
#2
Posted to alt.electronics
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Flat speaker...
Ernie Werbel wrote:
Greetings again. I am cleaning up my shop for a move, and in packing up some speakers I came across some interesting ones. These are your normal cone speakers, albeit smaller, ranging from about 1-1/4'' to 2'' in diameter. Quite interesting little buggers these are, miniature versions of the larger, black paper cones. Interesting enough? Well I came across a few more that had flatter magnets inset into the cone such that there was minimal protrusion outward from the back of the cone. While most of the small speakers that I come across have magnets about 5/8'' to 1'' deep on back of the cone, the most these extended was 1/8''!!! These speakers do work quite well, with ratings up to one half watt, and I must say the frequency response is quite satisfactory for general radio reception. I have to wonder, with such a marvel of mechanical engineering as these speakers are, it remains a mystery to me that they are so uncommon. Ernie Back in the early 70's, I had a pair of speakers that were only about 1/8" deep. Truely flat speakers. The sound quality was exceptional. The weirdest thing was that the "cone" was made of styrofoam. They were called "Poly Planar" speakers. Don't know what ever happened to them, but would love to have another pair. Have done a search on the popular engines, but can't find anything. Being that they were flat and had such good sound, I don't know why they didn't become popular. Very inexpensive at the time, too. |
#3
Posted to alt.electronics
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Flat speaker...
Elephant wrote:
Being that they were flat and had such good sound, I don't know why they didn't become popular. Very inexpensive at the time, too. Maybe your perception of a "good sound" was different back then ? geoff |
#4
Posted to alt.electronics
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Flat speaker...
Hey Elephant,
Last week I was having a similar discussion with one of my professors about speaker design. He said that speakers (and microwaves for that matter) are one of those "hidden sciences" that are more or less presented but not thuroughly taught. Anyway, we went up to his office and he had a poly-planar speaker that they took out of the ceiling. It has a red, plastic frame with five spokes. The diaphragm was flat styrofoam as you described. This is the first time I have ever seen anything like this! Quite interesting! Ernie Elephant wrote in message ... Ernie Werbel wrote: Greetings again. I am cleaning up my shop for a move, and in packing up some speakers I came across some interesting ones. These are your normal cone speakers, albeit smaller, ranging from about 1-1/4'' to 2'' in diameter. Quite interesting little buggers these are, miniature versions of the larger, black paper cones. Interesting enough? Well I came across a few more that had flatter magnets inset into the cone such that there was minimal protrusion outward from the back of the cone. While most of the small speakers that I come across have magnets about 5/8'' to 1'' deep on back of the cone, the most these extended was 1/8''!!! These speakers do work quite well, with ratings up to one half watt, and I must say the frequency response is quite satisfactory for general radio reception. I have to wonder, with such a marvel of mechanical engineering as these speakers are, it remains a mystery to me that they are so uncommon. Ernie Back in the early 70's, I had a pair of speakers that were only about 1/8" deep. Truely flat speakers. The sound quality was exceptional. The weirdest thing was that the "cone" was made of styrofoam. They were called "Poly Planar" speakers. Don't know what ever happened to them, but would love to have another pair. Have done a search on the popular engines, but can't find anything. Being that they were flat and had such good sound, I don't know why they didn't become popular. Very inexpensive at the time, too. |
#5
Posted to alt.electronics
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Flat speaker...
Ernie Werbel wrote:
Greetings again. I am cleaning up my shop for a move, and in packing up some speakers I came across some interesting ones. These are your normal cone speakers, albeit smaller, ranging from about 1-1/4'' to 2'' in diameter. Quite interesting little buggers these are, miniature versions of the larger, black paper cones. Interesting enough? Well I came across a few more that had flatter magnets inset into the cone such that there was minimal protrusion outward from the back of the cone. While most of the small speakers that I come across have magnets about 5/8'' to 1'' deep on back of the cone, the most these extended was 1/8''!!! These speakers do work quite well, with ratings up to one half watt, and I must say the frequency response is quite satisfactory for general radio reception. I have to wonder, with such a marvel of mechanical engineering as these speakers are, it remains a mystery to me that they are so uncommon. Ernie Hey Folks I am a Tv Tech , and you will find flat speakers in most of your FLAT screen TV units, especially Philips Lcd tv sets , the cones are plastic poly and when mounted in the unit have GREAT sound, but of course out of the cabinet, they sound like S--t. Just thought I'd let ya know.. |
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