Audalytic AH90 Manuale utente
AH90
Streamer& DAC& Headphone-amplifier
User Manual
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About MQA
MQA stands for Master Quality Authenticated.
Using pioneering scientific research into how people hear, MQA's award-winning technology
captures and authenticates the sound of the original master recording, and packages it for
efficient streaming and storage.
When playing MQA streams, "MQA", "MQA." or "OFS" will be displayed on screen.
"MQA": A regular MQA file is guaranteed to match the source material when played back on
a device with an MQA decoder.
"MQA.": An MQA Studio file is the same – but has also been approved in the studio by the
artist or producer, or verified by the copyright owner.
"OFS": A valid state of MQA indication for when a device receives an MQA signal already
decoded by a downstream piece of hardware or software.
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Contents
About MQA ................................................................................................................................................................................ - 1 -
Front Panel .................................................................................................................................................................................. - 3 -
Back Panel .................................................................................................................................................................................. - 4 -
Screen and menu ......................................................................................................................................................................... - 5 -
1. Screen .......................................................................................................................................................................... - 5 -
2. Input ............................................................................................................................................................................ - 5 -
3. Volume ........................................................................................................................................................................ - 5 -
4. Menu ........................................................................................................................................................................... - 6 -
Remote ...................................................................................................................................................................................... - 10 -
Specifications ............................................................................................................................................................................ - 12 -
Product Warranty ...................................................................................................................................................................... - 15 -
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Front Panel
1. Power button
2. Screen: Input Chanel, format, rate and volume.
3. Single-end: 6.35mm
4. Balanced: 4.4mm
5. The knob: Long press to enter/exit menu. Rotate in menu to select and adjust volume in main page.
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Back Panel
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Screen and menu
1. Screen
AH90 uses a high-resolution OLED screen to display the working situation and functions. The
following figure is main page of the display.
2. Input
AH90 In main page, short-press the knob to select the input port by the order of COAX1—
COAX2—OPT—USB—LAN.
3. Volume
In main page, rotate the knob to adjust AH90’s volume. There are 80 steps of digital volume from
00 to 80.
When the volume position is at 80 and then increase the volume to enter the fixed output mode
(volume bypass), the volume position displays FIXED. decrease the volume is to exit FIXED first
and then adjust the volume.
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4. Menu
In the main screen, long press the knob to enter the setting menu. In this state, rotate the knob to
switch up and down the menu items you want to modify the settings, the middle button is used
to adjust the currently selected menu options, when the screen is in the setting menu, long press
the knob again will return to the main page. When the screen is in the setting menu, press and
hold the knob once more to return to the main page. A long period of non-operation will
automatically exit the menu.
The menus are switched by cursor movement, in that order:：
—1).FILTER
—2).AMP GAIN
—3).OUTPUT
—4).PHASE
—5).BRIGHTNESS
—6).AUTO STANDBY
—7).UPGRADE
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1) FILTER：
The AH90 uses 6 types of AKM's built-in high-performance PCM filters:
SHARP Sharp Roll-off (Default)
SLOW Slow Roll-off
SD SHARP Short Delay Sharp Roll-off
SD SLOW Short Delay Slow Roll-off
SUPER SLOW Super Slow Roll-off (NOS-like)
LOW-D SHORT Low Dispersion Short Delay Filter
2) AMP GAIN:
The amplifier features two gain options.
LOW Low Gain, Output Voltage = DAC Voltage (Default)
HIGH High Gain, +6dB
3) OUTPUT:
Output configuration
AUTO (Default)
HP ONLY Headphone only
LINE ONLY Line-out only
When set to AUTO, once any headphone is plugged in, it will automatically disconnect the
internal output, and turn on the output when no headphones are plugged in. And the volume is
automatically lowered to 30 when switching automatically to avoid excessive volume.
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When set to HP ONLY, the line-out does not output whether headphones are plugged in or not.
When set to LINE ONLY, the headphone output does not output whether headphones are
plugged in or not.
******* For safety, the output volume is automatically reduced to 30 when the option is adjusted.
4) PHASE:
NON-inverted： RCA non-inverted phase
XLR 1-Ground 2-Hot 3-Cold
Inverted: RCA inverted phase
XLR 1-Ground 2-Cold 3-Hot
5) BRIGHTNESS:
Dark
Moderate
Bright
Auto off
Saver
Due to the OLED's own properties, long term high brightness use can easily lead to screen
burning.
Long-term use of bright options should be avoided.
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6) AUTO STANDBY:
ON
OFF
When there is no signal (coaxial/optical lockout) or no playback (no data streaming from
USB/LAN), it automatically enters standby mode after about 20 minutes.
7) UPGRADE:
Enter – Press the knob to enter the mode
Exit – Press the power button, or unplug and plug back in to exit this mode.
In this mode the AH90 USB-C port will become a card reader and can write directly to the
AH90 internal firmware storage.
Then follow the streamer's upgrade manual.
It is also possible to remove the internal firmware memory from the unit and use a card reader
to upgrade the firmware.
Indice
