Given that this is mostly the power rating of the bass driver, does that translate to safe power for the high freq. driver? Reason I ask
is that when I crank mine to clipping slightly on the amp (~450W), the protection lights are on a significant amount. Is that protection
light usable as a power warning light, or can this go on all night safely?
Next adventure is biamping the PSD2002. How can you tell when you've
reached the power limits in this situation (no passive crossover w/power limiter lights)?
Thx, Chris

I've run these speakers with this crossover for years and years on a Crown 2400 watt amplifier, pushing them hard for hours at a time and never had a failure. Not that I couldn't make a failure happen with a sine at 2kHz, but I certainly haven't babied them. I push them hard sometimes, and I've done it often enough that I feel confident in those resistor values and the numbers used. If I didn't, I'd change the design to use more of them.

The lamps would protect a driver without padding. The compensation components actually shift the point where protection is needed. So in this circuit, a pair of 211 bulbs make for very conservative protection, limiting more than is really necessary.