Whirlwind Mic to Line Driver/Headphone Monitor MD-1 user manual

Summary of the content on the page No. 1

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MD-1 MIC TO LINE DRIVER / HEADPHONE MONITOR

The Whirlwind MD-1 is the culmination of many years of joint product development
between our engineers and suggestions from professionals such as you. This compact
portable unit combines a high quality microphone preamp-line driver with a headphone
amplifier designed to monitor the mic preamp or be used independently. The MD-1
employs two 9-Volt batteries and provides enough

Summary of the content on the page No. 2

DRIVER position, the output male XLR connector receives the amplified balanced output of the MD-1 circuitry. With the switch in LOOP position the output XLR is connected directly to the female input XLR. This allows the MD-1 to monitor a signal looping through the unit without altering it. In the LOOP mode the MIC/LINE switch and GAIN control only affect the headphone amplifier. After the gain stage, the signal is also presented to the headphone gain and driver circuits via the

Summary of the content on the page No. 3

GAIN control adjusts the amount of level provided at the rear mounted output male XLR jack. Nominal gain is 40dB in mic mode, with the control set at #6. Headphone jack accepts 30Ω to 600Ω headphones for monitoring signals applied to the headphone amplifier. PWR button turns the unit on and off. BATT OK LED illuminates when the unit is turned on and will not illuminate when battery voltage is less than 13VDC. VOLUME control adjusts the level of

Summary of the content on the page No. 4

+12 dBm into a 2kΩ load Maximum Output Level +24 dBm into a 10 kΩ load +36 dBm into 100kΩ load 600Ω Output Impedance Rise Time 7uS C.M.R. (Common Mode >80dBm at 60Hz Rejection) of input >60dBm at 60Hz Line THD+n (Total Harmonic Distortion + Noise) Using <.1% 100Hz to 20kHz 200 ohm Inp