After reading so many enthusiastic comments on these speakers, I decided to join the club and bought a very nice used pair. After listening for a few weeks I was still very impressed. Unfortunately I was using a Chord Mojo line out. This Dac does not mémorise the volume used, so on turning on the system I sent the full 4.5v onto a 300 w amp. The speakers blew, but fortunately the crossover (no fuse) protected the speakers. Must have been the resistors. I bought another pair just for the crossovers but in the meantime I tri-amplified the speakers with an analog active crossover and the results are quite good. Now I don't know whether to install the passive crossover or stay active, frankly without comparing the two A/B I can't tell which is best. Any advice from NS 1000 Owners?