I should have mentioned the measurements were made with the tweeter potentiometer at 7 o’clock (fully CCW -), 9 o’clock, 12 o’clock, 3 o’clock and 5 o’clock (fully CW +) positions.
Charlie, Thanks for the modification information.? It appears that I have an issue with the potentiometers in the pair of DQ-10 that I recently recapped and repaired.? Attached are the measured SPL frequency responses of the pair that I am having the issue with (ROC) and a different pair of DQ-10 (NL).? The discrete high end changes (fully CW, fully CW, and anywhere in the middle) of the problem pair, confirms what I was seeing with the voltage measurements.? I'll have dig in further.? Perhaps with the modification you described.
