Names and functions
Front panel
❶
[PHONES] connector (1/4” stereo phone
jack)
This connector is used to connect to stereo head-
phones.
It is active when the [OUTPUT SEL] switch on the
front panel is set to the up (“PHONES”) position.
❷
[POWER] indicator
This indicator is illuminated in red when the USB
bus power is supplied to the unit.
❸
Input indicators (44.1k, 48k, 88.2k, 96k,
176.4k, 192k, DSD)
The appropriate indicator is illuminated in green de-
pending on the input audio source.
When no signal is input or when a signal with an
unsupported audio format is input, no input indica-
tor is illuminated.
* With a PCM audio source
The indicator corresponding to the sampling fre-
quency of the input signal is illuminated.
* With a DSD audio source
When the sampling frequency of the input signal
is 2.8 MHz, the “44.1k” and “DSD” indicators are
illuminated.
When the sampling frequency of the input signal
is 5.6 MHz, the “88.2k” and “DSD” indicators are
illuminated.
<Note>:Immediately after the power is sup-
plied to the unit, no input indicator is illumi-
nated.
❷ ❸ ❹ ❺
❻
❼ ❽ ❾
❶
❹
[DSD] indicator
This indicator is illuminated in green when the unit
plays back DSD audio.
❺ Volume control knob
Adjusts the analog output level of [PHONES] and
[OUTPUT] connectors.
(See “HP-A4 settings” on page E-8.)
❻
[INPUT SEL] switch
Selects the digital input source between the [USB]
and [DIGITAL IN] connectors.
(See “HP-A4 settings” on page E-8.)
❼
[FILTER SEL] switch
Selects the digital lter characteristics of the DAC.
(See “HP-A4 settings” on page E-8.)
❽
[GAIN SEL] switch
Selects the gain of the headphone output amplier.
(See “HP-A4 settings” on page E-8.)
<Caution>:Turn the volume control knob all
the way toward the left before you operate the
switch.
❾
[OUTPUT SEL] switch
Selects the analog output destination between the
[PHONES] and [OUTPUT] connectors.
(See "HP-A4 settings" on page
E-
8.)
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