Quote:
Originally Posted by hoss
how does a wider slug increase Bl? is it purely from the increase in ferrite and the higher "B"? (yup, cant think of the word for what that B stands for, know what it means, just cant think of the words lol)
if thats the case, it seems like saying a wider slug increasing Bl would be along the same argument as a larger sub playing lower... not neccisarily true. i mean, it worked in this instance, just trying to understand... this is probably a conversation for when im not so drunk...
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All else being equal, more magnet surface area increases the total flux available in the system. Ideally, you want as much magnet as possible to be spread out; you'd want to take your magnet and make it as wide as possible, with the limits being the amount of thickness needed for the mechanical stroke and the coercive force required to drive through the rest of the circuit.
If I had 300 ounces of magnet, I'd make it as shallow and wide as possible.
This new Fi speaker is shallower, but only by about an inch, according to the pictures. It's still a LOT thicker than the MAG. And it has a very large and deep back plate (certainly bumped internally), which means a long magnetic path through the steel. While that is better than air, it is not as good as flowing through magnet, so it will be a bit lossier than it needs to be...