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 foot). 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 three-pin XLR connector on the low-impedance end, with a 1/4 inch phone plug and phone jack adapter on the high-impedance end.
Flat, 20 Hz to 20 kHz. Response at 20 Hz no more than 3 dB down from flat.
Low impedance: 75 to 300 ohms (supplied) or 19 to 75 ohms
Medium impedance: High (41 k ohms with 150-ohm source on 75-to-300 ohm winding.)
75 to 300 ohms - 75 ohms
19 to 75 ohms - 37.5 ohms
19 to 75 ohms 75 to 300 ohms
Low impedance to
high impedance: +28 dB +22 dB
High impedance to
low impedance: -28 dB -22 dB
Maximum Recommended Input Levels
Being Driven Maximum
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
Full magnetic shield, steel with gray enamel finish
19 mm (3/4 in.) diameter; 89 mm (31/2 in.) long without adapters