Just wondering if anyone knows the inpout and output impedance of the MKII?
A passive control is a simple resistive divider. The idea is to have a potentiometer value higher than the source output impedance and lower than the amplifier input impedance.
Our passive devices use a 10k pot value, which is approx. 10x (VDA-2/825 ohms>>> 10k pot value>>> D-?00/100k).