Balanced Output
Most Audio-Technica microphones offer balanced output. A balanced output offers real advantages to the serious recordist. Balanced lines are much less susceptible to RFI (Radio Frequency Interference) and the pickup of the other electrical noise and hum. In a balanced line, the shield of the cable is connected to ground, and the audio signal appears across the two inner wires which are not connected to ground. Because signal currents are flowing in opposite directions at any given moment in the pair of signal wires, noise which is common to both is effectively cancelled out ("common mode rejection"). This cancellation can't occur when only one signal wire plus the shield is used. Of course, it is possible to wire a low-impedance microphone directly to an unbalanced low-impedance input, but the noise-cancelling benefit will be lost. This should not be a problem with short cable runs, but if longer cables are used, a balanced input is preferred.
site: http://www.audio-technica.com/cms/site/214c5c52432bc79b/index.html |
JOHN
LONGENECKER |
