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The Shure RK100PK is a Radio Frequency Interference (RFI) rejecting preamplifier for all Shure MX series microphones. The RK100PK features radio frequency interference properties that reject radio noise due to nearby transmitters, powerful 2-way radios, grounding issues, etc. The preamplifier features a standard 3-pin XLR output connector. An external phantom power source is still required to power the MX series microphones.
In the Box
Shure RK100PK - Radio Frequency Interference Resistant Preamplifier for Shure MX Series Microphones (Black)