Unbalanced Inputs - Violectric HPA V281 User Manual

UNBALANCED INPUTS

For the use with unbalanced signals, gold plated premium RCA sockets
are provided. They are labelled as "UNBAL IN LEFT" and "UNBAL IN
RIGHT".
Input impedance for all inputs is 10 kohms.
Maximum input level should not exceed +21 dBu.
This value is reduced to +15/+9 dBu if PRE-GAIN is set to +6/+12 dB !!
THE OPTIONAL DIGITAL INPUT
Currently the HPA V281 can be fitted with one out of six D/A converter
types, with three different inputs and a max. sample rates of 96 or 192
kHz:
The COAX input accepts digital PCM audio data in S/P-DIF format, at
sample rates from 28 to 108 kHz (or 210 kHz resp.).
The OPTO input, fitted with a TOS-LINK interface, accepts digital audio
data at sample rates from 28 to 108 kHz (or 210 kHz resp.).
The USB type "B" input can be connected to a host computer (PC or
laptop). The USB module will automatically be detected as an audio
device.
The USB 96 input is compatible with USB 1.1 and 2.0 standards. It
accepts digital audio formats up to 24 bit at sample rates of 44.1, 48 and
96 kHz, while 88.2 kHz is not supported.
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.
Digital audio formats up to 24 bit at sample rates of 44.1, 48, 88.2, 96,
176.4 and 192 kHz are supported, as well as the so-called
"asynchronous mode".
The 96 kHz digital modules comprise a D/A converter with a dynamic
range of 110 dB and –100dB THD+N, thus ranging in the upper-mid
performance class.
The 192 kHz modules are equipped with a top-notch converter offering
a 115 dB dynamic range and –103 dB THD+N, along with significantly
improved analog output circuitry.
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