E-8
HP-A4 settings
[INPUT SEL] switch setting
This switch selects the audio input source.
At the down (“USB”) position, the unit plays back a
USB audio signal from a USB-connected computer.
At the up (“OPT”) position, the unit plays back a
signal from the [DIGITAL IN] connector.
<Notes>:The unit cannot input signals from
the [USB] and [DIGITAL IN] connectors simulta
-
neously
[FILTER] switch setting
This switch selects the digital filter characteristics
of the DAC. Depending on the format of an audio
source, it works differently.
* With a PCM audio source
At the “1” position, a slow roll-off digital filter is
applied.
At the “2” position, a sharp roll-off digital filter is
applied.
* With a DSD audio source
At the “1” position, a digital filter with high cut-off
frequency is applied.
At the “2” position, a digital filter with low cut-off
frequency is applied.
[GAIN SEL] switch setting
This switch selects the gain of the headphone out
-
put amplifier. At the “HI” position, the gain is 10 dB
higher than the gain at the “LO” position.
<Caution>:Turn the volume control knob all
the way toward the left before you operate the
switch.
[OUTPUT SEL] switch setting
This switch selects the analog output destination
between the [PHONES] and [OUTPUT] connectors.
• To monitor audio from headphones that is con
-
nected to the [PHONES] connector, set it to the
“PHONE” position.
• To monitor audio from an amplifier/speaker sys
-
tem that is connected to the [OUTPUT] connec
-
tors, set it to “RCA” position.
<Note>:You cannot output the signal from
both of the [PHONES] and [OUTPUT] connec
-
tors simultaneously.
Volume level setting
You can adjusts the analog output level of [PHONES]
and [OUTPUT] connectors using the volume control
knob.
<Notes>:
• To get the optimum sound quality, it is rec
-
ommended to set the sound output volume
of your computer to maximum and adjust the
volume using the volume control knob of the
HP-A4.Note that, with Mac OS, the sound
output level is fixed to the maximum.
• The volume control knob does not affect the
output level of the [DIGITAL OUT] connector.
