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Re: CAST YOUR VOTE: Phase plugs AL or Brass
Aluminum has an effect on a magnetic field though...
That was my point about aluminum phase plugs more than the mechanical resonance... An electromagnetic effect could come into play due to the properties of aluminum and its behavior near magnetic flux lines.
This is why there are magnets near where you read the aluminum pointer on a three-beam balance, it steadies the see-saw motion of a precision scale kind of like a mini shock absorber.
I remember in a college level physics class, the professor had a spherical magnet that he dropped down an aluminum tube, and it took considerably longer than you would think for the magnet to reach the other end. Eddy currents were the culprit, on a physical level not necessarily like in electronics where the term is used more commonly.
Aluminum has important properties to consider when shielding electromagnetic devices and designing transformer cores and the such... Which leads me to believe that it has some effect on the whole system when used in speaker construction, whether negligible or not. (brass would too, metals don't have to be ferrous to interact with magnets)
I can't tell you more about it, besides the fact that it exists because I've never seen any research on the matter. I'm interested in testing this now to see what effects of this property can be measured. Hmm.
Aluminum has an effect on a magnetic field though...
That was my point about aluminum phase plugs more than the mechanical resonance... An electromagnetic effect could come into play due to the properties of aluminum and its behavior near magnetic flux lines.
This is why there are magnets near where you read the aluminum pointer on a three-beam balance, it steadies the see-saw motion of a precision scale kind of like a mini shock absorber.
I remember in a college level physics class, the professor had a spherical magnet that he dropped down an aluminum tube, and it took considerably longer than you would think for the magnet to reach the other end. Eddy currents were the culprit, on a physical level not necessarily like in electronics where the term is used more commonly.
Aluminum has important properties to consider when shielding electromagnetic devices and designing transformer cores and the such... Which leads me to believe that it has some effect on the whole system when used in speaker construction, whether negligible or not. (brass would too, metals don't have to be ferrous to interact with magnets)
I can't tell you more about it, besides the fact that it exists because I've never seen any research on the matter. I'm interested in testing this now to see what effects of this property can be measured. Hmm.
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