Hum in MBox inputs... Hum Eliminator didn't work, blnced cables didn't...

[dl0banter]

Hum X didn't work (its basically a noise gate as when I play a note, the hum comes back with the tone that is supposed to be played).

The keyboard is an Alesis QS 6.1. I get hum on either input of the MBox, it doesn't matter if I come out of the mains on the Alesis or if I go headphone jack, the hum is still there.

The hum is still there if I plug everything into the same power strip, the hum is still there when I use headphones instead of speakers etc.

I don't know what to do next... I think I've tried every permutation of combincations of things... I wonder if a $200 power conditioner will help? That's a hefty price but worth it if it actually solved this issue...

Oh... just some symptoms:

Unbalanced cables make the hum worse.... any connectors in between cable from main or headphones onthe output of the keybaord and the input on the Mbox makes it worse. A hum eliminator will double the hum noise and make the system dangerous (i get zapped when touching metal parts when this configuration is in place).

What's going on here?

D