INST Switch

This switch selects the 1/4Ó Instrument input as the source for the compressor.

DRIVE control

This control sets the amount of gain that will be applied at the input of the vacuum tube stage present in the Compressor section. This control offers tube drive control (with its sonic stamp) to any signal routed through the Compressor.

SC (SIDECHAIN) ENABLE switch

This switch enables the Sidechain processing loop. The Sidechain in and out connectors on the 566 rear panel allow external processing of the CompressorÕs detector signal. This switch has no effect if there is nothing plugged into the Sidechain loop even though the switch will light when pressed. For more discussion of the Sidechain see page 16.

SC (SIDECHAIN) MON switch

This switch allows you to monitor the sound of the Sidechain processing. The switch will light when pressed to indicate that you are listening to the Sidechain; not the main signal path.

CONTOUR switch

This switch adds a gentle low frequency de-emphasis into the detector path (this is identical to hav- ing an equalizer in the Sidechain loop, only weÕve done it for you). This is extremely useful in keep- ing low frequency program material from ÒmufflingÓ or Òpunching holes inÓ the compressed signal. This feature allows faster attack times and higher compression ratios with less artifacts. The switch will light indicating contouring is activated.

BYPASS switch

This switch bypasses the compression section completely. The input is ÒhardwiredÓ to the output bypassing the tube amplification and VCA circuitry. This feature is very useful for setting optimum compression and gain settings because it gives you an instant reference to the amount of effect youÕve introduced to your signal.

LEVEL control

This is the output gain control (also known as a Ògain compensationÓ or Òmakeup gainÓ control). It is used to compensate for signal level lost due to compression and for excess gain contributed by the tube drive section. There is +/- 15 dB of gain control available with this knob.

PeakPlusª Limiter THRESHOLD control

This control sets the threshold level at which the PeakPlusª Limiter circuit becomes active. The threshold range is from 0 dBu to +22 dBu (off). The PeakPlusª Limiter stage is a unique program Limiter featuring Intelligent Predictive Limitingª. Its function is to monitor the input signal and intelligently predict the amount of gain reduction needed to keep the output signal below the ceiling set by the PeakPlusª control.

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dbx Pro 566 owner manual Inst Switch
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566 specifications

The dbx Pro 566 is a versatile audio processing unit designed for professional sound engineers and musicians seeking high-quality sound enhancement and comprehensive control over their audio signals. Combining advanced technology with user-friendly features, the dbx Pro 566 has become a staple in both live sound environments and studio settings.

One of the standout features of the dbx Pro 566 is its dual-channel signal processing capability. This allows users to manipulate two audio channels simultaneously, making it an ideal choice for stereo applications. The unit includes a powerful parametric equalizer with multiple frequency bands, enabling precise tonal adjustments. Users can easily tailor their sound to fit various musical styles or venue acoustics, enhancing overall audio clarity.

The dbx Pro 566 also integrates a high-performance compressor that provides dynamic control over audio signals. Its flexible threshold, ratio, attack, and release settings allow for fine-tuning of compression characteristics, ensuring that the audio maintains its natural dynamics while preventing clipping or distortion. This feature is particularly useful in live sound situations where maintaining consistent audio levels is crucial.

Another technology that sets the dbx Pro 566 apart is its built-in de-esser. This dedicated circuit is designed to reduce harsh sibilance in vocal recordings, providing a smoother and more balanced sound. This is essential for vocal performances where clarity is vital, allowing for a more pleasant listening experience.

The dbx Pro 566 also boasts comprehensive metering options, including LED meters for visual feedback on levels and gain reduction. These indicators help users monitor their audio signals effectively, facilitating quick adjustments when necessary. The unit's user-friendly interface ensures that sound engineers can navigate its features without hassle, making it accessible for both beginners and experienced professionals.

In terms of connectivity, the dbx Pro 566 features standard XLR inputs and outputs, ensuring compatibility with a broad range of audio equipment. Its robust build quality and reliability make it suitable for both studio and on-the-road applications, providing longevity in demanding environments.

Overall, the dbx Pro 566 is a powerful audio processor that delivers essential features and advanced technologies needed for modern audio production. Its combination of equalization, compression, and de-essing capabilities makes it an invaluable tool for achieving high-quality sound in various settings. Whether for live performances or studio recordings, the dbx Pro 566 stands out as a top choice for audio professionals.
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