Why do I need balanced power?
Power standards for electrical distribution were adopted many decades ago
and haven't changed significantly since. With the advent of sensitive electronic
applications, electrically induced interference has become a matter of
concern to engineers. When electrical interference is present in any sensitive
electronics, equipment performance will be limited by the noise. The problem
is critical in many areas of high-tech electronic engineering, among them,
the sound recording and video industries. A very low noise level is crucial
in these areas because literaly, the noise can be seen and heard.
The dynamic range of the entire electronic signal chain determines the
quality of the final product in all recording environments. The presence
of any electrical interference at all lowers the S/N ratio of the recording.
This limits the subtle detail and realism of the sound or image. Low level
signals are lost in the noise floor of the system.
Sound quality can also be affected by intermodulation distortion occurring
as a result of the presence of ac noise in the audio or digital signal
bandwidth. Even if the noise level is inaudible, it is likely that program
material will be colored by the presence of electrical interference.
In more sophisticated areas of application, for example high-end digital
signal processing (such as broadcast automation or even MDM recording),
unacceptable error rates are often attributed to background electrical
interference. Digital jitter is the "smoking gun" that points to high frequency
AC noise. Digital jitter is caused in part by high frequency electrical
interference approximating the bit stream rate of the digital signal.
Balanced power eliminates all of these problems because there is never
ac interference present on the ground to invade signal circuits. Balanced
power often increases the dynamic range of a recording system by 16db or
more. When balanced power is applied, ground loops and hum problems, even
subtle ac noise coloration becomes a thing of the past. The difference
can be astonishing.
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