Altec 601C and the 3000.

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A year passed since last time, but I wasn't in any hurry.
Just in case ordered two sets of dom's, the Dayton ND16FA-6 (0.625") and the Dayton ND20FA-6 (0.75"). The ND16FA-6 is just to drop in, the ND20FA-6 have to be cut around to fit.
I ended up using the ND20FA-6 and cut it around with a side cutter, it's easy.
Once fitted in the horn I measured the resonance frequency to 1380Hz.
 

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  • ND20FA-6 in box.jpg
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  • Cutting the ND20FA-6.jpg
    Cutting the ND20FA-6.jpg
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  • Front of ND20FA-6 cut and the ND16FA-6.jpg
    Front of ND20FA-6 cut and the ND16FA-6.jpg
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  • ND20FA-6 in the cavity.jpg
    ND20FA-6 in the cavity.jpg
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  • Front of horn w ND20FA-6.jpg
    Front of horn w ND20FA-6.jpg
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I am all for smiles, especially on the top, could change the world.
Just to be complete, is there a third driver candidate, the Vifa OX20SC00-4.
Only 4 Ohm, but the shape is closer to the original WE saltshaker module.
The diaphragm is sticking out of the top surface as the original, almost the same dimensions of the voice coil (ID: 18.85mm vs the Vifa 19.2mm), this means the dome would fill the curved (donut) shaped portion of the cavity closer, like the original does it.
To achieve the same with the Dayton one would need a lathe to turn down the rest of the waveguide flat.
 

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  • Vifa OX20SC00-4 Drawing 1.jpg
    Vifa OX20SC00-4 Drawing 1.jpg
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  • Vifa OX20SC00-4 Drawing 3.jpg
    Vifa OX20SC00-4 Drawing 3.jpg
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