The 50k master pot at the output will cause a very high output impedance, can I just remove it to solve this issue?

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Fairly new to electronics but I've noticed that the potentiometer on the right side will cause a high output impedance, when I want it to be close to 0. Can I just remove this potentiometer to solve the issue?
 
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A gain
That output will be close to 0 correct? I had thought of just adding a unity gain buffer after the master pot but I realized that just removing it would be easiest as I already have a gain pot in the feedback loop of the U1A op amp.
A Gain pot is not a Volume pot, different function.

If you are worried by output impedance, use 10k Audio instead, impedance will never rise above 2k5 at any setting.

Low enough to drive almost anything.