Appendix D: Balanced/Unbalanced Audio

Balancing refers to the type of input or output signal connections in an audio system. These connections are specifically designed to reject external noise, such as from mains wiring and internal interference from adjacent signal cables. Unlike unbalanced lines, which are more susceptible to noise, balancing is especially useful when long cable runs are used between pieces of equipment and can also provide other benefits, including an increase in line signal level and a decreased possibility of ground loops. Balanced connections are typically employed on long cable runs, such as to amplifiers, or for cables carrying sensitive or low level signals, for example, mics. A balanced line typically employs connectors of the XLR and 1/4” TRS jack plug types.

The basic principle of balanced interconnection is the cancelling out of any electrical noise by means of a three-cable connection to achieve the required signal. Two of the cables, called “hot” and “cold”, are used to carry signals, and the third is a grounded shield that surrounds the hot and cold cables. (An unbalanced connection only has two cables, one of which, the grounded shield, is also used for signal return.) As the hot and cold cables are of equal voltage (and the same source impedance), but of opposite polarity, when they are subtracted any noise voltages — caused by interference and noise pick-up — appearing identically on both cables is cancelled out; the difference between them being the resultant signal.

However, in practice the electrical noise on both cables will never be identical, and the degree to which it is reduced is measured by the common mode rejection ratio (CMRR). The electronically balanced input and output connections of the DN530 have the benefit of high common mode rejection (CMR), which eliminates externally induced interference such as mains hum etc. CMR is the ability of a balanced input to reject the part of the incoming signal that has the same amplitude and opposite phase on both input terminals, referenced to ground. As a specification, CMR is usually stated as a dB ratio, called CMRR, at a given frequency.

Note: On balanced circuits, the ‘hot’ signal is also known as “+ve” and “in phase”, while the ‘cold’ signal is also known as “-ve” and “out of phase”.

DN530

 

Operator Manual

37

Page 48 Page 50
Page 49
Image 49
Klark Teknik DN530 specifications Appendix D Balanced/Unbalanced Audio
Page 48 Page 50

DN530 specifications

The Klark Teknik DN530 is a versatile and powerful dynamic range compressor, designed to meet the demands of both music production and live sound engineering. Renowned for its high-quality audio processing capabilities, the DN530 offers a wide array of features that benefit professionals in various audio applications.

One of the standout features of the DN530 is its dual-channel compressor design. This allows users to process two separate audio signals simultaneously, making it an ideal choice for stereo applications. The compressor utilizes advanced VCA technology, which ensures consistent dynamic control while maintaining the natural character of the audio. This technology provides a transparent sound, making it suitable for a variety of instruments, vocals, and other audio sources.

The DN530 offers comprehensive control over compression parameters, including threshold, ratio, attack, and release. The threshold determines the level at which compression begins, while the ratio defines the degree of compression applied to signals exceeding the threshold. Users can manipulate the attack and release settings to shape the compressor's response to the audio signal, allowing for greater flexibility in achieving the desired sound.

Another key characteristic of the DN530 is its sidechain feature. This allows users to introduce external audio signals to control the compression applied to the primary signal. This function is particularly useful for dynamic ducking effects, such as reducing the volume of background music when a vocal is present or achieving a pumping effect in dance music.

The DN530 also includes an innovative metering system, featuring LED indicators that provide clear visual feedback on signal levels, gain reduction, and other important parameters. This enhances the user experience, allowing sound engineers to make informed adjustments quickly and efficiently.

Built with rugged construction, the DN530 is designed to withstand the rigors of live performance environments. Its sturdy chassis and reliable components ensure longevity and durability, making it a trusted addition to any professional audio setup.

In summary, the Klark Teknik DN530 is a feature-rich dynamic range compressor that excels in both studio and live sound scenarios. With its dual-channel capability, advanced VCA technology, comprehensive control over compression parameters, sidechain functionality, and robust build quality, it stands out as a top choice for audio professionals seeking to enhance their sound processing capabilities.
Top Page Image Contents