N Cook wrote:

The blurb technical said 300W RMS handling for this 12 inch speaker.
Now it is blown and I've opened up
2 layers of 90 turns , so 180 turns of .16mm or 6.3 mil/thou diameter wire
on 64 mm diameter former.
300 Watt ?

Who knows? There are so many design factors that come into play. Let
alone what the manufacturer meant by "300W RMS handling" - Peak RMS? If
so, for how long? Continuous RMS? 300W at what frequency?

Rick