Simply put, we have no idea. There are so many on-board preamps on the market, and their specifications all vary. Even if the plug is identical, the volume and balance may not work well with your existing onboard preamp.
If you need an onboard preamp, we strongly recommend our EPS001 series - we've benchmarked it against systems that cost hundreds of dollars more and our system offers amazing tone and control for the price.
The EPS001 unit has a socket that's mono output, and the lead from the EP001 passive piezos is a 2.5mm mono connector which either plugs into our EPS001 preamp or the actual output jack.