I have read on this forum that the Alnico drivers demagnetize due to large voice coil currents. This means that I could possibly demagnetize the driver if playing too loud.

However, I haven't found on the topics how much would be loud enough? What are the large currents for these drivers to demagnetize?

Can I drive a JBL L300 (with 2231A) with a McIntosh MC402 at loud levels? I like to play loud and usually the power meter goes to the 40-400W range.

How long for can I drive these speakers at very loud levels without ruining anything?