Violectric HPA V281 User Manual page 28

"standard" amps.
Why does a relay make sense when switching power ?
Amplifiers generate unwanted output signals when applying or removing
power, which can damage the connected headphones. The relay breaks
the connection between amplifier and headphone and thus protects the
latter until electrical conditions have stabilized.
Some words about the different digital input options.
At the moment there are 6 different digital inputs for the V281.
These offer coaxial, optical or USB inputs and accept up to 24 bit digital
data.
Coax & Opto 96 accept sample rates up to 110 kHz, the USB 96
accepts 44.1, 48 and 96 kHz, please note: NO 88.2 kHz. The USB 96
input is compatible to the USB 1.1 and 2.0 standard.
All the above modules own a D/A converter which we would judge to be
"upper middle class" with a dynamic range of 110 dB and THD+N at -
100 dB.
Coax & Opto 192 accept sample rates up to 210 kHz, the USB 192
accepts 44.1, 48, 88.2, 96, 176.4 and 192 kHz and supports the so
called "asynchronous mode".
The USB 192 input is compatible with the USB 2.0 standard. It requires
a proprietary driver, which can be downloaded from www.violectric.de.
The above modules are equipped with a top notch D/A converter with a
dynamic range of 115 dB and THD+N at -103 dB, along with
significantly improved analog output circuitry.
Which USB devices can be connected to the HPA V281 ?
Connections can be established to table-top or laptop PCs. MP3 players
or similar gear cannot be connected.
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