Join Date: Mar 2017
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What is the Xmax of this Celestion T5745A SP-1200 speaker?I modeled it, and here is what it looks like with the recommended enclosure size, with a 45Hz 2nd order HPF, and 100 watts, which keeps it within the 5mm xmax.
: You can contact Celestion for technical support. Drdecibel at their domain (I'm not allowed to post it here)
Here's what he sent me.
"Xmax 2.5 mm
Coil winding ht 13 mm
Gap ht 8mm"
This is a very conservative rating based only on the amount of voice coil overhang. Speakers from other manufacturers with similar topology will be rated higher because they use a different formula, like overhang + a percentage of the gap ht, or by audio measurement up to an arbitrary amount of distortion (usually 10%).
A comparable speaker from another manufacturer would likely be rated between 3.3 - 5 mm depending on their method.