Holo audio Azure Manuale utente
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Preamp / Headphone Amplifier
User's Guide
Overview
“沧”Azure is a preamp/headphone amplifier from Holo Audio.
“沧”Azure adopts a fully balanced structure with 4 groups/channels. The
left and right channels form a fully balanced structure. Each channel has
two independent amplification modules to complete the buffering and
amplification functions.
There is a total of eight amplifier modules built into the “沧”Azure and
they are fully discrete. The design is able to solve the shortcomings of the
transistors, so that its tone can exceed the limits of traditional transistors. It
also has both the advantages of tubes and transistors. And the use of a large
quantity of transistors makes the linearity of the amplifier superior in every
way.
The volume control of “沧”Azure is a fully balanced stepping device
controlled by a relay. It has a total of 64 steps, and each step is 1 db
volume. The advantage is that the noise is minimal and small, and it can be
precisely controlled, even at a low volume the left and right channel will
not be biased.
“沧”Azure has three output modes, low-impedance headphone output
mode, high-impedance headphone output mode, and line output mode.
Specification
Analog Input
⚫Single Ended Input x1
◼Largest Value 12Vpp
◼Impedance 3.9Kohm
⚫Balanced Input x1
◼Largest Value 24Vpp
◼Impedance 7.8Kohm
Analog Output
⚫Single Ended Line Output x1
◼Largest Value 16Vpp
◼Impedance 33ohm
⚫Balance Line Output x1
◼Largest Value 32Vpp
◼Impedance 66ohm
⚫Headphone Single Ended Output x1
◼Low Resistance Mode - 400mW@32ohm load
◼High Resistance Mode - 180mW@300ohm load
⚫Headphone Balanced Output x1
◼Low Resistance Mode - 1600mW@32ohm load
◼High Resistance Mode - 720mW@300ohm load
Balanced Headphone Input
S.E. Headphone Input
Output Indicator
红色-
Input Indicator
Display
Multi-Function Knob
Front Panel
Output indicator, red light is the low-impedance headphone output, and green
light is the high-impedance headphone output. Not lit for line output. Input
indicator, red light for single-ended input and green light for balanced input.
AC Power Input
Signal Input
Signal Output
Rear Panel
Mute
Display Brightness Setting
Input Settings
Volume +
Volume -
Reserved (invalid)
Output Settings
Remote Control
Setting
Set by remote control
For details, please refer to the Instructions in the remote-control
section.
Set through the multi-function knob on front panel
In the default mode, rotate left and right to set the volume, short
press the knob to mute/unmute Press and hold the knob to enter the
setting mode. Press and hold the knob again to enter the next setting
mode. The order is “IN – Input Settings”, “OUT – Output Settings”,
“DISP - Display Brightness Settings”. In the setting mode, rotate left or
right to make the corresponding settings.
Volume Setting
The adjustable volume is 64DB, one step per 1DB. When set to 100, it
is the maximum, and when it is set to 36, it is the lowest level.
Input Settings
SE –Single-Ended Input
BL –Balanced Input
Output Settings
LINE –Line Output
HPL –Headphone low resistance output，Single-ended and balanced
headphone ports on the front panel suitable for headphones below 100
ohms impedance. Low resistance output
HPH –Headphone high resistance output，Single-ended and
balanced headphone ports on the front panel for headphones with 100
ohm impedance or more.
Display brightness setting
Set the brightness of the display, a total of 6 levels/shades. The
lowest level is to completely turn of the display.
Indice
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