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Digital Crossovers

One part I was telling you about active crossovers and their advantages in the previous pages of the site, and here will be discussed on modern and top class of these devices. Usually they have several names: the acoustic system controller, sound processor and so on. Generally they do not differ from analogue models and almost always have the option of treatment and regular analog signal using an analog input. However, in this case comes to converting signals from analog to digital, then back to analog, where the advantages of this signal is starting to lose. Analog input is optional and serves as an additional option. Therefore, for the quality work of these devices a digital signal is still necessary.

Their biggest advantage its combining functions of two different devices: the DAC and the crossovers. It liberates you from buying a special and expensive device. For example, DAC of the DCS Company is 30-50% more expensive than typical digital processors. But on DAC you have to connect an analog crossover, work switching input-output, to give additional rack space etc. In fact, each output digital crossover is practically a separate DAC, which can be set to operate in a limited range of frequencies. Is it necessary at all to buy expensive DAC, JMF or MSB devices, if their benefits, noise performance and dynamic range hopelessly disappear even in high-quality analog crossover?

Second major advantage of these devices is that, they produce the sound signal separation in its original form of the numeral, thus it does not "enrich" noise and distortion, as it is the case with analog device.

Thus, the concept of crossover literally disappears from the sound path, since the use of digital crossover allows complete independence from analog devices. If we look at passive speakers, analog crossover, was located in the tract is placed after the amplifier, while in the case with digital crossover it simply does not exist.

Digital crossovers have the following functional advantages over standard, analog:

  1. Ability to set up points of signal distribution anywhere within the range, that allows a maximum effective distribution of signal among absolutely different drivers.
  2. Choosing the steepnes of the atenuation filter in the range 6 to 48dB.
  3. Installation phase and time delays between drivers. Analog crossovers have only the possibility of phase correction signal.
  4. The presence of programmable Equalizer, which usually has 10 bands, allows you 2 or 3 small correction of amplitude-frequency characteristics.
  5. Management from a PC and downloading software updates.Governance with a personal computer and updates. Installation of presets-readymade configuration files for a particular model of the acoustic system. Such files are available on the acoustic systems manufacturer website, although not always.


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