My guitar player has a Taylor, active with an XLR out. Once I made him a balanced cable, he no longer goes through a DI, but straight to the board - XLR from instrument/TRS 1/4" to the board. That's as familiar as I am with XLR instrument outputs.
Not unlike Brad, I'm not familiar with the Schertler pickups, but I find it odd that what is seemingly a passive pickup has an XLR out. Normally you'll use a balanced cable for longer runs (from a DI with a transformer) from your DI into the board. I'm not one into impedance matching or mismatching, so I'll now refer to Booli for that.
I will say this - we recorded this past weekend. My ukulele player finally learned to use his ParaAcoustic DI, and is now asking about a Venue. He will no longer "forget" his DI at home.
That said, the guitar, with the XLR out straight into the board, could've used some help. I would've loved to put a DI in front, but he fixed the tone in when he mixed it post. We normally run through JBL Eons, so we never REALLY hear what the instruments sound like. We could hear EVERYTHING this weekend, and the system clarity exposed everything (different system). More reason why my ukulele player will never forget his ParaAcoustic DI at home, and exactly why I thought the Taylor needed help.
I agree with Brad, you should use a pre in front of it, but I also don't know of one that accepts a balanced XLR input.
This is reminding me of a current thread in Talk - worrying about the pickups, and running through a Micro Cube. I refrained from commenting on that, as I will here. Anthony has it right, you're not trying to polish a turd, but don't dull the finish either.
Edit: JB, you made me look. Seems Shertler not only makes nice tuning machines, but they also make preamps with balanced XLR inputs and outputs. I'm not even complaining about the retail cost for a Venue now, which is about $400. Now I gotta check Radial's site. . .