Inputs:
There are three AES/EBU inputs on XLR connectors, and one on Toslink (optical). In addition each of the four inputs has an S/PDIF (RCA) connector wired in parallel. The accepted sampling frequencies are 44.1, 48, 88.2, 96, 176.4 and 192 kHz.

Synchronization:
Several signal reclocking schemes are combined for extremely high jitter attenuation, making the MEDEA virtually immune to jitter over a very wide bandwidth.

Converters:
Multibit sigma-delta D/A converters are used. Our correlation technique which combines two converters per channel gives the MEDEA an additional boost in signal to noise ratio and linearity.

Outputs:
The discrete Class A outputs have a virtually zero Ohm output impedance, but still can drive complex loads without stability problems. Output levels can be set between -infinity and +27dBu. The outputs are symmetrical on XLR connectors and asymmetrical on RCA connectors. They do not have any sound degrading servo mechanisms built in.

Power Supply:
An overrated, non-switching power supply is used. All sensitive voltages have their own regulators which are separated between left and right channels. The result is an analog output free from "digital noise" and channel crosstalk.

Mechanical Design:
The MEDEA employs a twin metal frame. The inner chassis is made of steel and acts as a very effective shield against electrostatic and electromagnetic radiation. The outer frame is made of thick anodized aluminium for additional shielding, for optimal heat convection and for beautiful looks of course.

Frontpanel controls:

• Four switches with corresponding blue LEDs are used for selecting one out of four input sources.
• Two trimmers set the output levels, one for the left, one for the right channel.
• Power switch

Backpanel elements left to right:

• Analog outputs on XLR and RCA connectors with output level range switch
• Digital inputs 1 - 4
• Mains connector

Digital Inputs:

• (3) XLR connectors (inputs 1..3)
  
• (1) Toslink connector (optical) (input 4)
  
• (4) RCA connectors (inputs 1..4)
• All inputs accept professional or consumer standard in the Channel Status Data
• Sampling Frequencies: 44.1, 48.0, 88.2 or 96.0 kHz, 176.4 and 192kHz on two inputs
• Sampling frequency tolerance: +-80ppm
• Maximum input wordlength: 24 Bits

Analog Outputs:

• (2) XLR Connectors
  
• (2) RCA Connectors
  
• Servoless, DC coupled, short circuit proofed output circuitry
  
• Output impedance: 0.2 Ohm
  
• Output level "low" mode: variable from -infinity to +15dBu
  
• Output level "high" mode: variable from -infinity to +27dBu
  
• Output level variable with two 25 turn trim potentiometers
  
• Output stage: Discrete Class A

Converters:

• Multibit sigma-delta converters
• Correlation technique using two converters per channel

Synchronization:

• Synchronized via input signal
  
• Extremely efficient Jitter attenuation down to subsonic frequencies
  Sampling Frequencies: 44.1 kHz, 48.0 kHz, 88.2kHz or 96.0kHz, 176.4 and 192kHz

Power:

• Mains Voltage: 110 / 220 Volt
  
• Fuse rating: 500 mA slow blow
  
• Power Consumption: 80VA max.

Measurements:

• Measurements taken at the following conditions (unless noted otherwise):
  +27dBu output level, 44.1kHz sampling frequency (fs), 22kHz measurement bandwidth.

Frequency Response:

• @ fs = 44.1kHz: DC ... > 20kHz +- 0.05dB
  
• @ fs = 48.0kHz: DC ... > 20kHz +- 0.05dB
  
• @ fs = 88.2kHz: DC ... > 40kHz +- 0.5dB
  
• @ fs = 96.0kHz: DC ... > 40kHz +- 0.5dB

Dynamic Range:

• 115dB unweighted, 118dB A-weighted

THD+N @ 1kHz:

• -107 dBr @ -3 dBFs input, (0dBr = +27dBu)
  
• -105 dBr @ 0 dBFs input, (0dBr = +27dBu)

SNR @ -40dBFS input:

• 114dBr unweighted (0dBr = +27dBu)
  
• 117dBr A - weighted (0dBr = +27dBu)

Linearity:

• from 0 to -100dBFs input level: < +-1dB deviation from ideal
  
• from -100 to -130dBFs input level: < +-1.5dB deviation from ideal

Crosstalk:

• < -130dB, 0..20kHz

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