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Alcons Digital Drive Processors Audio Ribbon Amp Controller

Marking a very important step forward in Alcons’ “system synergy” philosophy, the first Digital Drive Processors are now leaving the factory.
The DDP is an exchangeable signal processing device, which is complementary to the Alcons Amplified Loudspeaker Controllers. The device offers speaker-specific processing and controlling options, enabling the ALC to optimally drive all Alcons pro-ribbon speaker systems in any configuration for any application.

Placing the “2-in / 2-out” DDP in the front of the ALC converts the ALC from a “standard” stereo power-amp into a dedicated amplified loudspeaker controller. Due to the modular concept, Alcons users now have a choice between fixed analog and variable digital system processing.

Jeroen Fortanier, R&D engineer DSP/electronics: “The DDP has been designed to offer intuitive control and utmost reliability while preserving the sonic excellence of Alcons’ pro-ribbon based sound systems. This was not an easy task, as the extreme resolution of our pro-ribbons reveals even the smallest sonic details.”

Due to this requirement, the design was based on a 96kHz. sample rate Delta-Sigma conversion with 27-bit (stacked) word length and fixed-point internal processing, driven by a powerful 56 bit, 120 mips DSP engine.

Fortanier continues: “Another important development task was operation reliability. Although we previewed the DDP already at the 2006 Frankfurt show, we kept the 0-series production version under extensive beta-testing to assure reliability under all conditions.“

The System Drive section of the DDP provides system controlling and optimizing, with presets for all available Alcons systems and system configurations.

Some unique DDP features include:
- Intelligent Driver Guidance IDG processing: optimized power response through “True-RMS” intelligent power and (separate) excursion limiting guidance.
- “Von Helsing’s Filterslope Architecture”; crossover filtering is done with hybrid Bessel, Butterworth or Linkwitz Riley responses, enabling optimal speaker matching.
- CSQ “Constant & Symmetrical Q” algorithm offers complete filter integrity for the on-board parametric equalising.
- LimitLog provides real-time signal logging on signal present and dB limiting of the selected system, over the past 7.000 operating hours.

General functions include: complete Alcons systems library, input signal routing, 4-band parametric eq, delay up to 294ms, 99 user-programmable and nameable presets, preset recall/compare function, a.o.

The complete system status can be seen with a single view on the DDP “home-page” on the large 128x64 dots backlit LCD display.

Firmware updates are performed via the side-located USB-port; Dedicated boot-loader software makes the firmware updates efficiently Internet-downloadable, where Alcons system owners have unlimited, free updates for all current and future Alcons systems and system configurations.

The DDP is backed by Alcons’ renowned 3-year “no hassle” warranty.

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