Shure A95U Transformer

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Description

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This reversible transformer matches low or high-impedance microphones to high or low-impedance inputs. The transformer permits use of very long microphone cables with either low or high-impedance microphones. However, when connecting a high-impedance microphone, limit the cable length between the microphone and the transformer to 4.6 m (15 ft). The cable from the transformer to the low-impedance input can be any desired length. The transformer prevents high-frequency loss, level loss, and pickup of noise and hum. The A95U comes furnished with a 3-pin XLR connector on the low-impedance end, with a 1/4 in. phone plug and phone jack adapter on the high-impedance end.

Technical Info

Frequency Response: Flat, 20 Hz to 20 kHz. Response at 20 Hz no more than 3 dB down from flat.

Impedance
Low impedance: 75 to 300 ohms (supplied) or 19 to 75 ohms
Medium impedance: High (41 kohms with 150-ohm source on 75-to-300 ohms winding.)

DC Resistance
Low impedance: 75 to 300 ohms - 75 ohms, 19 to 75 ohms - 37.5 ohms
High impedance: 4300 ohms

Voltage Ratio
Low impedance to high impedance: +28 dB (19 to 75 ohms), +22 dB (75 to 300 ohms)
High impedance to low impedance: ?28 dB(19 to 75 ohms), ?22 dB (75 to 300 ohms)

Maximum Recommended Input Levels (Source Impedance/Winding Being/Maximum Driven Level)
33 ohms/19 to 75 ohms/0.5 V
200 ohms/75 to 300 ohms/1.0 V
600 ohms/High impedance/10 V
5,000 ohms/High impedance/10 V
33,000 ohms/High impedance/10 V

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