SM58 Microphone with TAB-Funkenwerk Transformer

The venerable 57 and 58 have been a staple of the audio industry for so many decades I think we've all lost count. They're good, solid mics that are wonderful in the fact that they never "suck". However, having been designed primarily for live use and application the original design is rolled off by a measure on the top.

The AMI T58 microphone output transformer was developed as a high resolution transformer upgrade for existing SM-57 or SM-58 microphones to give the same solid character without restricting upper mid and high end response. It effectively makes the mic closer to that of an SM-7 [a mic that usually goes for about $350- at most retailers].

SPECIFICATIONS

Primary impedance: 15 to 25 Ohm
Primary inductance: 250 mH (120Hz) @ 1.5 Ohm
Step up ratio: 1 to 5
Secondary inductance: 5.4H (120Hz) @ 25 Ohm
Short impedance: 0.029mH

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