Beyerdynamic MA 212, MA 206 Optional Accessories, Technical Specifications, Microphone inputs

Problem	Possible Cause	Solution
Hum in the output	• The source itself has a hum	• Determine if the source is defective
		or wired incorrectly and correct
	• The input wiring passes near AC mains	• Reroute the input wiring
	wiring
	• Defect in the unbalanced wiring	• Balanced connection to the input
		source
Buzz in the output	• The source itself has a hum	• Determine if the source is defective
		or wired incorrectly and correct
	• The input wiring passes near AC mains	• Reroute the input wiring
	wiring or wiring to lighting dimmers
	• There is pickup of RFI (radio frequency	• Try different cabling or grounding
	interferences) from TV transmissions. This	techniques. Try to solve the problem
	kind of interference sounds like power	by using the 0.1 µF capacitor connected
	line related buzz, but tends to change in	to bypass the shield. Try different
	character every few seconds due to	routing of input and power cables.
	changes in the video image.
Distortion in the	• The source output is set too high and the	• Reduce the source output level and
output	gain control of the amplifier is turned way	increase the setting of the gain
	down to compensate.	control of the amplifier.
	• The source itself is distorted.	• Try a different source and/or have the
		source repaired.

7.Optional Accessories

Different desktop microphone units and microphones

ZA 2 Transparent cover for the operating

controls and indicators . . . . . . . . . . . . . . . . . . . . . . . . Order # 453.005 ZE 100 Retrofit item for earth-fault control . . . . . . . . . . . . . . Order # 453.781

8.Technical Specifications

Frequency response . . . . . . . . . . . . . 55 - 18,000 Hz

Distortion (THD) . . . . . . . . . . . . . . . . ≤ 0.08%

Signal to noise ratio . . . . . . . . . . . . . -75 dB

Microphone inputs

Characteristics . . . . . . . . . . . . . . . . . . electronically balanced Input impedance. . . . . . . . . . . . . . . . 600 Ω Pre-amplification . . . . . . . . . . . . . . . 1 - 100 mV, adjustable

Phantom power . . . . . . . . . . . . . . . . 0 - 24 V, adjustable for Mic 1 and 2, Connection . . . . . . . . . . . . . . . . . . . . 3-pin XLR

Priority control . . . . . . . . . . . . . . . . . Ducking function on Mic 1 and 2, 0 - -40 dB attenuation, adjustable first priority for Mic 1 and second priority for Mic 2

over the other inputs

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