I believe that the number on the crossovers are the measurement in HTZ where the frequency crosses over to the subwoofer. I have mine set at 75, so any frequency over 75 HTZ goes to the two front speakers, frequencies below 75 HTZ go to the subwoofer. Hope this helps...and I hope I am right.
Vandersteen X-2 crossover???
I have a pair of Vandersteen X-2 crossovers (rca) for use with 2wq subs. They have 50k printed on them. Does this mean that they are for use on amps with a 50k input impedance?