Construction

The DNP’s development and realization combines cutting edge circuit design with Audionet’s eighteen years of experience in digital and analogue technology. More than 5000 individual components ensure accurate signal processing. Isolated and autonomous power supplies for digital and analogue sections further reduce power source-related imperfections.

High-performance processors working in combination with Audionet’s proprietary software for digital signal processing manage the digital signal processing of the Audionet DNP.

 

Equalizer, Delay- and Bass-Management

The DNP’s double precision bass management uses 48-bit resolution at all sampling frequencies, enabling the most accurate reproduction of even the lowest frequencies. The bass manager offers freely selectable cutoff frequencies, filter Q factors, and subwoofer phases; thus enabling integration of up to two subwoofers into the network, and are configurable into multi-room outputs.

The digital parametric equalizer uses 5 Minimum Phase Equalizers (MPE), for main channel and subwoofer outputs. Each MPE is configurable in filter type, frequency, gain, and Q factor within an unusually wide adjustment range, allowing the effective optimization of all parameters and compensation of less than ideal room characteristics or acoustical problems. The delay manager allows for a range of up to 7 meters, automatically calculating delay times in relationship to the setup and speaker distances while allowing phase control of each subwoofer.

 

Signal Processing

In order to optimize the D/A conversion, Audionet’s engineers pursued the uncompromising reduction and elimination of jitter, resulting in a highly exact, musical and solid sound image, stage and depth. To this end, we have developed Audionet’s Intelligent Sampling Technology, which performs with stellar results the analogue signal recovery from the digital bit stream. Audio data is routed through a two-stage filtering and decoupling procedure.

First, the input data is filtered with Audionet’s proprietary software using a powerful signal processor and up sampled synchronously, through filters designed for optimal transient and frequency response. At the next stage, the optimized data is then resolved through an asynchronous up sampling procedure at 192kHz/24bit, allowing the complete isolation from any potential jitter originating from the input clock. The resulting audio data is then passed to two high-performance converters, which are clocked by dedicated ultra high precision quartz crystals and individually processed per channel into analogue signals. This method ensures that jitter faults are eliminated – completely lossless – in the analogue signal to the highest degree, resulting in unmatched clarity, room depth, and stage imaging. In addition, power flux interferences are avoided by powering the digital section of the Audionet DNP entirely separately from the analogue section.

 

Architecture

No compromise is made in craftsmanship of the analogue signal processing as well. Circuit construction has been designed for maximum performance using only the finest components. At each point, we use the highest quality parts the world has to offer, many of them custom made. For example, filter caps are designed to our specifications using Japanese silk dielectrics, custom mica caps, and selected high-current foil caps from Germany, manufactured for an ultra low loss angle. Internal wiring is done with top-grade silver/gold alloy, and the best available connection systems from our colleagues at WTB in Essen.

In order to meet our own standards of performance, operational amplifiers used in the Audionet DNP are manufactured in-house. Each contains more than 86 discrete components, for a unique gain-bandwidth product. The volume level is set by an electronically switched, real time linearized precision resistor network, for unmatched accuracy. To optimize the high frequency properties, the circuits have been miniaturized, and signal paths reduced to a minimum. The circuit layout eliminates sound marring components such as coils, chokes, and capacitors in the signal path.

The analogue section operates on a separate power supply with a 100VA toroidal mains transformer, and 62,000 µF of filtering capacitance, and dual stabilization provide d by discrete, instantaneous voltage regulators. In addition, local voltage at each op amp is filtered again with an extra total capacitance of 8,000 µF filtering capacitance. Noise, distortions, and crosstalk are a thing of the past, setting the stage for Audionet DNP’s to redefine today’s state of the art.The Audionet DNP defines today’s metrological state of the art. Noise, distortions and crosstalk have been reduced to a minimum to deliver a maximum of energy, dynamics and sonic purity.

Technical Data

 
Analogue inputs

 
Digital inputs