Violectric DHA V590² Pro Headphone Amplifier, Preamp, and DAC User Manual
Page 15
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The balanced input is equipped with an XLR socket according to AES 3-1992,
transformer-balanced, at 110 ohms input impedance and 200mV sensitivity at Tnom/2.
It accepts PCM Signals up to 24 Bit, up to 192 kHz.
- The coaxial input is fitted with a RCA socket according to IEC 958 and AES-3-id resp., unbalanced.
It accepts PCM Signals up to 24 Bit, up to 192 kHz.
- The optical input provides a TOS-Link connector according to EIAJ RC-5720.
It accepts PCM Signals up to 24 Bit, up to 96 kHz.
- The USB input is specified as an audio interface according to USB 2.0.
It accepts PCM Signals up to 32 Bit, up to 384 kHz and DSD Signals 64 - 256
The USB input is not in need of any drivers for Apple, Linux and Android units.
For Windows 7 to Windows 10 full performance is achieved with drivers available here:
https://amanero.com/drivers.htm
HEADPHONE AMP PRE-GAIN
These DIP-switches are situated on the back of the unit inside the field of the analogue inputs.
Settings can be made for the left and right channel - they shall not be different from each other.
With these switches an additional gain or attenuation may be set.
It is dependent on the output level of the input source and the sensitivity of the headphones
connected. By this measure it is maintained to achieve lowest possible noise and maximum travel of
the volume attenuator. The high gain/attenuation range of +/-18 dB (factor 64) ensures a perfect
match of any source with any headphone in the market.
Please see page 18 to learn more about: “Too loud? Too soft? The PRE-GAIN method”
SELECTING / ACTIVATING AN INPUT
With the “ANALOGUE INPUTS“ and “DIGITAL INPUTS “ buttons on the front of VIOLECTRIC DHA
V590 one of three analogue inputs or one of four digital inputs may be activated. The corresponding
LED is illuminated. Concerning the digital inputs, also the “PCM“ or “DSD“ LED is on as long as an
appropriate digital signal was detected. When there is no signal on these inputs or a non-valid signal,
these LEDs will stay dark and the outputs are muted.