If your volume control is 10K, R1 = 68.1K and R2 = 30.1K.
If your volume control is 20K, R1 = 76.8K and R2 = 15K.
If your volume control is 25K, R1 = 84.5K and R2 = 15K.
If your volume control is 50K, R1 = 75K and R2 = 10K.
If your volume control is 100K, R1 = 82.5K and R2 = 10K.
If your volume control is 250K, R1 = 86.6K and R2 = 10K.

For installation: insert the DIM switch in-line = between the input jacks and your volume control.


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