I would match up your AT with an amp that works best with lower impedance phones. Creek OBH21 can do low or high impedance (more dynamic) or the GRADO RA-1 battery (smooth and very natural sounding with very good detail).
Not sure of the Meier but I think the ciaudio works better with Sennheisers.
Not sure of the Meier but I think the ciaudio works better with Sennheisers.