DCN22 is a high performance digital crossover filter with equalization and delay. It features two balanced analogue inputs and 2 single-ended analogue outputs. The usage of a high performance Texas Instruments codec gives DCN22 crystal clear sound and low noise floor. The sample rate is 96 kHz to extend bandwidth and have low order analogue low pass output filtering. The resolution of converters is 24 bit and the internal signal processor resolution is 76 bit. The signal processor will be configured as 2 output channels of 20 IIR filters each and the two input channels with 10 IIR filters each for equalization. There is a switch input selection of two presets with the 2 x 10 IIR filters in the input processing block. The two output channels features a peak limiter on each output in the digital domain and the thresholds is set in the software. DCN22 is designed to be implemented as an digital crossover front-end in an active subwoofer "plate amplifier". DCN22 has an optical isolated USB programming interface to avoid hum and noise from the PC.

DCN22 is powered from several separate unregulated supplies from PSU8AGS. DCN22 has onboard regulators for each part of the circuitry to minimize disturbance between different circuitry. DCN22 and PSU8AGS are highly integrated and require each other to operate.

The muting of the Ground Sound power amplifier modules is done via an opto-coupler.

The XOverWizard II software is a graphical tool to manipulate with input, outputs, gain, crossover frequencies, crossover slopes, equalization and delay. The software has a very significant feature: The ability to import a text file containing measured driver data of frequency, sound pressure level and phase. With these data the XOverWizard II software are able to display frequency response and more, while design are in progress. Compared to this method the “old” trial and error method seems obsolete. The software comes in two versions: A standard version as described above and an advanced version which include measurement system and optimizer. See more details at the XOverWizard II page.
Please notice: The software USB Dongle-key will have to be bought seperately - Webshop

Specifications:

• Resolution 24bit
• Sample rate 96kHz
• Total processing power: 60 biquads
• S/N-ratio: >110dB
• 2 balanced analogue inputs
• 2 single-ended outputs
• Max. input voltage 8Vpp - 0dB
• Dual slope output limiter in the digital domain
• Frequency response: 5-48kHz (-3dB)
• Latency input-output about 1ms
• Optical isolated USB interface
• Max. output voltage 12Vpp - 0dB
• Designed for use in the Active Ground Sound concept
• 2 presets for easy adaption to application
• Mute control for Ground Sound amplifier modules
• Power supply from PSU8AGS
• Weight: app. ?g
• Overall dimensions: 130mm x 96mm x 52mm