From SAS website:
Changes in amplifier input impedance, 20k ohms to 100k ohms, will change the tonal balance, especially in the bass/mid range. The 11A has an adjustment to compensate for changes in amplifier input impedance. No other manufacturer that we know of has this feature.
Changes in amplifier input impedance, 20k ohms to 100k ohms, will change the tonal balance, especially in the bass/mid range. The 11A has an adjustment to compensate for changes in amplifier input impedance. No other manufacturer that we know of has this feature.