PACS 75.50. Kj, 76.90.+d A new super-giant magnetoresonance effect was found in LC resonators consisting of a glass-coated microwire with capacitive terminal electrodes. The changes of resonance frequencies were examined as a function of the electrode dimensions in amorphous Co 83.2 B 3.3 Si 5.9 Mn 7.6 microwires . The widths of two capacitive electrodes at the end of the microwire were varied from 3 to 6 mm, and the gap lengths between the electrodes were also varied from 6 to 9 mm. The shape of the impedance curves as a function of a dc magnetic field changed dramatically near the LC resonance frequency. The phase angle was also strongly dependent on this field. The sudden change of impedance by as much as 6400% with a change of phase angle as large as 180° is a new phenomenon, which is evidence for the occurrence of the magnetoresonance at a given intensity of the external dc field.