Yes, but varies based on the quality of the adaptor. I would recommend WBT or Cardas.. or have a professional install an extra output on your preamp.. not a big job at all.
Using Y-adapter to duplicate preamplifier outputs
Is there any loss from using y-adapters to duplicate an output on an amplifier? Case in point; I want to duplicate my preamp output to feed a ss amplifier and a tube amplifier. Both will not be used simultaneously. I just don't want the hassle of having to remove interconnects each time I am going to use one amp or the other.