14
The
OPTO
input is made according to the TOS-Link standard and is
waiting for digital PCM audio data with a sample rate between 28 … 108
kHz.
The
USB
type-B inputs on can be used to connect a host computer
(desktop or laptop PC). The headphone amp will be automatically
detected as an audio device. The USB input is 1.1- and 2.0-compatible.
Audio files stored on the host can be sent to the headphone amp,
whereas audio formats 24 bit with 44.1, 48 or 96 kHz are supported.
All digital modules are offering a DA converter offering 110 dB dynamic
range and –100 dB THD+N. Thus representing an upper-middleclass
solution.
Please note:
-
The digital input has priority over all other inputs and will mute these
when a valif digital signal is detected
-
When a USB cable is inserted, it may be required to restart running
media applications on the host.
-
Volume control of the host application should be set to 100%.
Too loud ? Too soft ? The PRE-GAIN method
The V181 is specially designed to drive headphones. Headphones
however can present load impedances from 8 to 2000 ohms and
efficiency ratios from 85 to 115dB per milliwatt. Thus it can be quite
tricky to fulfil all demands, since...
… owners of high-effectivity headphones will rarely set the volume
control higher than 9 o'clock in order to exclude hearing damage, while
