Re: noise on sound system
So, if you use a DI box which does not provide the feature of isolation via a transformer between 1/4" input and output (which would allow you to separate the grounds but would use insulated 1/4" jacks in the box), you can use the 1/4" or RCA (unbalanced) to XLR (balanced) feature of the box, run an XLR cable, and use a simple XLR to 1/4" adapter (balanced to unbalanced) at the other end, and then use the "ground lift" feature of the box to completely isolate the two systems. If all you were concerned about was avoiding the presence of ground loop voltage on the signal leads, you could just use an XLR to 1/4 adapter at each end of the balanced cable. But that would still allow the ground difference to cause problems inside the circuitry of the computer.
Originally Posted by ggunn
Sunny Boy 3000US, 18 x BP Solar 175b panels, installed 2009.