[Bubbalou88]

Originally Posted by junkgear

Ideally, yes, you would connect the left TRS output of the MBox to the TRS input of your left speaker and the right TRS output to the TRS input of your right speaker. A balanced (TRS) connection uses the tip, ring and sleeve to deliver a single mono signal between devices. It uses all three connections so that it can cancel out noise and give you a cleaner signal.
The cable itself is no different than a regular stereo cable in design.

It sounds like you speaker system is looking for a stereo input and not a balanced TRS input. I would not suggest plugging your speaker into the TRS output.
Possibility someone here knows of a safe way of doing this, like with an adapter or something.

Ok so Ring and Tip are out of phase signal to cancel noise and the Sleeve is shield