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Februar 2010

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January 2010

2 channel high end digital output stage with integrated switching power supply from now on available !

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Updated 19.02.2010

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High end digital stereo output stage with switching power supply !

Digital Audio Endstufe
  • 2 channel output stage, ready for use
  • Implemented preamplifier and controller
  • Front panel pcb, available in two versions
  • Backplane pcb available, to switch 3 unbalanced inputs

click here to entlarge pic


This digital output stage is assembled and ready to use. The stage is powered by a low noise resonant switching supply with a aktiv power factor corection who allows very wide main power ranges, the supply include a built-in line filter with overvoltage protection.

The equipping of this output stage include a preamlifier with digital volume control and a balanced input stage. The volume, the relays and the thermal management of the output stage are controled by a processors. The threshold levels for the thermal management, voltage control and preamplifier gain are programable.

We pursue with this output stage a pair of "Quadral Vulkan MK5". This speaker is a real-transmision-line who requires high power. The sound of this combination is in the bass area very powerful. The midrange and the heights marks itself by an overpowering dynamic and fine resolution. Summed up, offers this output stage a well-balanced and natural sound quality like these are to be found only at very high-quality and expensive output stages.

Technical specifications off the SDA500_SNT output stage:

  • Main power range: 90 - 260 Volt AC / 50-60 Hz
  • Power supply: low noise resonant converter with aktive PFC
  • Built-in line filter with overvoltage protection
  • Idle power consumption: 15 Watt
  • Efficiency: 92%
  • Output power: 2 x 600 watt peak power at 4 ohm *
  • Inputs: balanced and unbalanced
  • Input sensitivity balanced: +6dBu / 1,55 Veff **
  • Input impedance: 10 kOhm
  • Bandwidth: 5-45 kHz / an 4-8 Ohm
  • Output impedance: typical 50 mOhm
  • Damping factor: typical 150 (bezogen auf 8 Ohm)
  • distortions: typical 0.01% / 20-20 kHz
  • Signal to noise ratio: typical 110dB / 20-20 kHz

  • Dimensions LxWxH und weight: 280 x 140 x 50 mm, ca. 1400 g

* The specified input sensitivities are standard values, on request these values can be adapted to your requirement.

** The output power specification are given basically as peak power. Sinus or root mean square power specification are lacking in practical relevance and state nothing about the really power output.

Download Datenblatt SDA500SNT datasheet SDA500_SNT / 2 x 500 watt amplifier modul

Price include 19% VAT taxes, additional the shipping costs: 1050,00 euro ***

Backplane signal switch, compatible to the SDA500_SNT

Quellen umschalter
  • Backplane PCB, ready to use, for 3 unbalanced inputs
  • Equipped with 3 pairs first-class quality cinch-sockets
  • Low expenditure wiring, with flat ribbon cable
  • Divide resistors, for the input level adaptation

click here to entlarge pic


The backplane signal switch PCB can be used to increase the SDA output stage with 3 unbalanced inputs. The backplane is equipped with 3 pairs first-class quality cinch-sockets, high quality signal relays as well as Divide resistors, for the input level adaptation. The cinch-sockets are multiple special gold-platted, Teflon-isolated and high precise manufactured.

Technical specifications off the signal switch:

  • Relay drive voltage: 12 Volt
  • Vertical as well as horizontal mounting possible
  • Dimensions of the PCB HxWxT, without cinch-sockets: 52x52x11 mm
  • Height cinch-sockets, measured from the PCB bottom: 24 mm
  • Space between the cinch-sockets, between L & R: 25,40 mm
  • Space between the cinch-sockets, between the sources: 17,78 mm

Price include 19% VAT taxes, additional the shipping costs: 65,00 euro ***

to be continued...

*** Prices as well as VAT taxes, are referred to private ultimate consumers, and for the national market. Reseller prices, as well as VAT taxes for products that ar determined for the export, are on request !

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