I have the single channel version of that for my dsp unit. I went through another one before that one and switched it out for a model that had 255 steps as the other had 127. In the end it didn’t make much of a difference but I do have one with an eprom that I want to try out. Currently I have mine setup to read the current value after power up and reduce it to a good level, when the car is turned off it also checks and if the volume was above a certain value it will set it to a lower one. That way I won’t give anyone a heart attack when getting in the car.