geolemon

It's more a matter of "which material fits my design goals better"...
Is lighter necessarily better?
A lighter moving mass actually raises Fs (resonant frequency), which is seldom desirable.
A lighter moving mass doesn't even affect a woofer's transient performance... that's essentially a function of inductance... a lightweight moving mass doesn't make the subwoofer sound any cleaner, or respond any faster to transients.
Here's a good article on that subject:
http://www.adireaudio.com/Files/Tech...ooferSpeed.pdf

Even if it is true that Aluminum "burns up" when some temperature threshhold is reached, and Copper does not... it really is not relevant as thermal damage rarely involves windings melting.
When a voice coil gets excessively hot, it exceeds the temperature of the glue holding it onto the former well before the metal itself would melt. The glue lets go, and the windings release, turning into spaghetti inside the motor.

As for the rest of the differences... such as impedance... IMO those are just variables that a designer can use to his advantage. One may work better in an application than another... given a certain number of windings/layers with a certain gauge of wire, one may yield the target impedance better than another, etc.

mister steve

my bad aluminum is lighter, and you need a thicker conducter then copper to carry the sa,e current as copper, its softer and doent have as much tensile strenght

(i was confused and cheacked my 1st year books agen)

mister steve

towards the end of the production of the beyond audio inhuman you could put what ever suspension/coil configuration it that you wanted.

Loud Brown Kicker Colt

iTrader: (1)

I plan on getting the aluminum coil recone kit for my solo 18X, for the high tuning that a wall uses,an aluminum coil is desired.

Rip Rock

Copper for daily driving and aluminum for spl.