Resistive and reactive? Don't know ... guess it is time to pull out an electronics textbook.

The current attenuators (20 db) do the same thing to every system they have been installed into (1 tubed, 2 solid state). They attenuate the signal but the bass and dynamics of the system get squashed.

There are no schematics of the amps. Is that what would help? The digital eq has an output impedance of 120 ohms.