Here is the recommendation from SR's Ted Denney himself:
Yes, you can put a Master Fuse on your amplifier, but in all likelihood, you will try one or two higher up in the signal chain, like your DAC and or PRE, and choose this as your place to stop. In the system with a loom of Purple and/or Orange fuses, the point of diminishing returns will likely be reached with the addition of one or two Master Fuses higher up in the signal path. If someone would like to try a third Master Fuse, sure try on your power amp (or Ethernet Switch) But in all likelihood, most will find their best results with one or two Master Fuses higher up the signal chain than the amplifier which is end, or very near the end of the chain.