They symbolize the contoured “Tight” bass sound. If the Bass control is moved from the center position (0) to the left, the bass sound becomes very deep, soft and warm. This sound is known as “Soft”. This is symbolized with round scaling points which also increase in size as the intensity increases.

The further the Bass control is shifted to the right or left of the center position, the more intensive the bass sound in question. However, Process Level (7) must be positioned to the right of the 9 o´clock setting for the bass to be audible. You can always hear the original (dry) bass if the Bass control is in the center position. The Process Level control determines the processing ratio between the set bass sound colour and the original signal. This results in varying bass sound structures: if you combine high bass amplification on the Bass control with a lower Process Level value, you get a different bass structure than with a lower bass amplification combined with a higher Process Level value. Choosing the best solution is a matter of personal taste and also depends on the type of original signal involved.

Control elements

Selection of two bass timbre (Soft – Tight) and adjusting the intensity

Varying bass sounds by balancing Bass and Process Level

The active filter-network to process the bass operates with a RC-combination (R = resistor; C = condenser). The LC Filter switch adds a passive coil/condenser filter to the network.

Coils are known for their pleasant sound. When getting satu- rated they produce a special harmonical structure giving a certain punchy sound that we know from old filter designs. The Tube Vitalizer offers you the choice between both ‘worlds’.

The Tube Vitalizer features a compressor, which is integrated into the bass filter network. The original signal is left untouched. When recording on digital equipment it is essential not to over- load the inputs of such systems which results in invalid samples or digital peaks. As the bass frequencies carry most of the level it makes sense to integrate a compressor into the bass-path. This compressor works with a soft-knee characteristic. We designed the compressor around the well acclaimed THAT 4301 VCA as a ‘one-knob’ solution to make it easy to operate. The threshold, attack and release are automatically adjusted. The Compression control sets the ratio value.

The blue Gain Reduction LED indicates the point at which the compressor starts to operate. When you turn the Compression control fully clockwise the entire bass processing is nullified.

4Bass – LC Filter

Adding a passive LC filter network to the bass filtering system

5Bass Comp.

This easy-to-use compressor works exclusively on the bass and helps you to control the bass amplitude especially when recording on digital media

The Gain Reduction LED indi- cates compressor operation

TUBE VITALIZER

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Sound Performance Lab 9530 manual Bass LC Filter, Bass Comp
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9530 specifications

Sound Performance Lab (SPL) 9530 is a state-of-the-art audio processing unit designed to meet the demands of both professional audio engineers and avid music enthusiasts. As an integral part of the SPL product lineup, the 9530 exemplifies the company's commitment to high-fidelity sound and innovative audio technologies.

One of the standout features of the SPL 9530 is its advanced equalization capabilities. The device employs a fully parametric equalizer that allows users to finely tune their audio environment. With up to 30 bands of EQ control, the 9530 provides unparalleled precision, enabling sound engineers to sculpt audio with meticulous detail. The system includes both boost and cut functionalities, giving users the power to address specific problem frequencies in their mixes.

The SPL 9530 also incorporates sophisticated dynamics processing. With its built-in compressor and limiter, the device can manage the dynamic range of audio signals effectively. This feature is particularly useful for live performances and studio recordings, where maintaining consistent audio levels is crucial. The compressor's transparency allows artists to achieve a polished sound without sacrificing the natural characteristics of the audio.

Another exceptional characteristic of the SPL 9530 is its compatibility with both analog and digital audio formats. The unit features high-quality A/D and D/A converters that ensure the audio signal remains pristine throughout the processing chain. This versatility allows for seamless integration into various setups, whether in a professional studio or a live sound environment.

Additionally, the 9530 incorporates innovative SPL transformer technology, which provides superior signal integrity and minimizes distortion. This design ethos resonates throughout the entire unit, ensuring that audio quality remains uncompromised at every stage of processing.

The SPL 9530 also supports remote control options, allowing users to adjust settings from a distance, adding convenience to complex audio setups. The intuitive user interface, complete with clear LED indicators, makes operation straightforward, even during high-pressure situations like live performances.

In summary, the Sound Performance Lab 9530 is a comprehensive audio processing solution featuring advanced EQ and dynamics processing, compatibility with multiple formats, and superior sound quality. Whether for studio use or live applications, the SPL 9530 stands as a crowning achievement in modern audio technology, delivering flexibility and exceptional performance for any audiophile or sound professional.
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