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LME49720 & LME49600 Composite Unity Gain Stability

Other Parts Discussed in Thread: LME49600, LME49720, TEST


I am designing an output stage for a headphone amplifier, using an LME49600 inside the feedback loop of an LME49720 configured for unity gain. I would like to know if/what extra precautions should be taken to ensure stability when operating at unity gain?

The source will be a 10K potentiometer. Would it be worth adding a feedback resistor (R33 and R34 in attachment) of ~1.2Kohms to closer match the input impedances?

Many thanks