Technology has been an interesting topic to ponder in the Telepath universe. With the steampunk feel to it, a lot of technology fits in with the 17-18th century technologies found in Europe. Yet the presence of the Gift allows us to expand the range of technologies available and to encroach into the future in some cases, without losing credibility at the same time.
For instance, the Energy Golems require some high-energy crystals, which might be something also related to resonance crystals, with the latter amplifying the Psy's power, whilst the former are able to store Psy power and emit it in energy form (in this case, coherent, monochromatic EM radiation).