We are often asked if it is possible to use one control knob (HD-RLC or RBC-1) with multiple amplifiers. The answer is yes. You just need to get an RJ-11 / RJ-14 modular telephone adaptor. Make sure the adaptor is a four-wire to four-wire design and not a dual line splitter. In the United States, you can find them at Radio Shack with the catalog number 279-008.
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