I couldn't swear to it Peter since it's been a while but my recollection is that with the XPA2 and M80s with an 80 hz crossover setting the protect circuit did not trip, the results are probably in the thread I started on that topic but the point is probably moot, because I did not test the crossover issue extensively since at that time I was waiting for an 800 to be built and was not that intrigued by the possibility of discarding the LFEs entirely, and the prevailing opinion at that time was that the supposed dip below 4 ohms question was not a real issue, e.g., Alan stated that the 80s were a nominal 4 ohm design with no dip below 4 ohms across the audible range, I suppose it did not occur to me at that time that the audible range is typically defined as 20 Hz - 20KHz and that the problem might be in the range of 10-20 Hz.
