Yes, it can. But best performance probably with a single one. I have shared one over a 218 and a switch. I thought it sounded better when it was just on the 218, but the difference was marginal and it could have been in my head. Nice to see someone else has done this upgrade too! It is a cheap way to transform the performance of a 218.
Regards,

Main: DSP8000SE< 218 < Farad Super3 TMCB < PS Audio P10. Room correction: Focus Fidelity.
Second: Fostex Fe206NV2 < Audio innovations 500 valve amp < Wiim Pro +
Study: DSP33 < Reviver < MS200
Server: ROCK + Tidal on NUC, fiber on 2x cisco 2960, HD-Plex LPS.
Gone: DSP7200SEu, DSW, DSP5500mkI & DSP5000mkI, 508.20, 210