The best hum remover is to eliminate it at the source, not try to remove it afterward. You likely have a ground loop somewhere, or a bad cable. Before you go trying to fix it by throwing a hum eliminator at the problem, first try to troubleshoot the problem and really fix it.
1. Make sure all your AC is in order. No ground lifters, all AC coming from the same branch circuit.
2. Go through all your interconnects and look for a bad cable.
3. If no luck with these, work from the power amp or powered monitors backward. No hum with just the pwr amp and no input? Connect the next device upstream - any hum? Keep going till you find it.