You would have to use a MP-2 with a ADC-20, not a AD-20. The ADC-20 is a Graham Patten unit and the AD-20 is a Denecke unit. I ran M210 > MP-2 > ADC-20 for a few months and pulled some good tapes, but was not absolutely crazy about the combo, possibly due to mic factors. I have some tapes with MBHO > MP-2 > ADC-20 and liked those a lot better. The Gefells gave me really detailed tapes with a (too) crispy high end and a fat but controlled low end. The MBHOs did not have as much detail in the high end, but did not have as much bass either.