HOLO AUDIO Bliss Headphone Amplifier User Manual
- June 8, 2024
- HOLO AUDIO
Table of Contents
Headphone Amplifier
User Manual
OVERVIEW
A new generation of fully discrete headphone amplifiers.
FEATURES
The Bliss adopts a true and fully-balanced design from end to end, with 4 sets
of channels, left and right channels each form a fully-discrete design. Each
Channel has two fully-discrete and separate amplification modules to complete
buffering ond amplification (attenuation)functions, for a total of 8
amplification modules.
The 8 amplification modules of Bliss are of a fully discrete design. The
shortcomings of the transistor itself ore solved through its structural design
and implementation. Its tone can exceed the limitations of traditional
transistors. Using significant amounts of paired transistors delivers superior
linearity, ond at the same time has the advantages of electron tubes and
transistors.
The Power supply in Bliss is a completely independent structure from the
secondary transformer. This is a dual-mono amplifier placed in a single
chassis. It has a full frequency of 120dB performance of channel separation,
so that the sound field is perfectly produced.
The Bliss volume control is a fully balanced stepping device controlled by
relay-con-trolled gain stage. its relays are the finest quality, with Silver
Palladium (AgPd) Gold plated contacts. The relay controlled gain stage
provides 84 steps, each step is 1dB volume and provides a volume control from
-72dB to ’12d3. Its advantage is that it has ultra-low noise and can be
accurately controlled at low volume without causing the phenomenon of left and
right channels having unmotched levels. The matching degree of left and right
channels in all volume ranges are within +1- 0.1dB.
SPECIFICATIONS
| Single-ended RCA input (QTY 1) | Maximum amplitude 8.4Vrms |
|---|
Input impedance 6.2K Ω
Balanced XLR input (QTY 2)| Maximum amplitude 16.8Vrms
Input impedance 12.4K Ω
4P XLR Output| Low impedance mode (LO-Z): Output impedance 0 Ω , power
12Wrms©32 Ω
---|---
High impedance mode (HI-Z): output impedance 15 Ω , power 2.5Wrms©150 Ω
4.4mm Pentaconn Output| Low impedance mode (LO-Z): output impedance 2 Ω ,
power 12Wrms©32 Ω
High impedance mode (HI-Z): output impedance 17 Ω , power 2.5Wrms©150 Ω
6.35mm TRS Output| Low impedance mode (LO-Z): output impedance 1Ω , power
3Wrms©32 Ω
High impedance mode (HI-Z): output impedance 8.5 Ω , power 0.6Wrms©150 Ω
| Single-ended RCA Output | Maximum amplitude 10Vrms |
|---|
Output impedance 20 Ω
Balanced XLR Output| Maximum amplitude20Vrms
Output impedance 40 Ω
Size| 430x300x55mm / 16.93×11.81×2.17inches (W x L x H, Dimen-sions do not
include protruding parts)
---|---
Weight| 10kg / 22.051bs
Power Input (configurable, see label on bottom of unit for specified input)|
220-230V 50/60Hz — Use Fuse Type 2A SB 5x2Omm (when internal switches are
set@220v)
---|---
110-115V 50/60Hz — Use Fuse Type 4A SB 5x2Omm (when internal switches are
set@110v)
Power consumption| 50W
| Included Accessories | AC Power Cable x1 (Applicable to N. America only) |
|---|
Remote Control x1
FRONT PANEL
POWER / INPUT / MUTE I VOLUME KNOB
POWER ( INDICATION LIGHT IS WHEN POWERED IN OFF-STRTE, AND GREEN WHEN ON)
Press and hold this button for 1 second to switch the power on and off. In the
off state, all power is off except for the standby circuit and red indication
light, other circuits of the Bliss will stop working and will have no output.
MENU
Press to enter the menu, each press switches between INPUT, OUTPUT, and
DISP. INPUT: Use knob to switch among XLR1, XLR2, and RCA, in turn.
OUTPUT: Output setting, select HP HI-Z (headphone high impedance), HP
LO-Z (headphone low impedance), LINE (line output) through the knob. DISP:
Display mode setting, select the display screen ON (open), OFF (automatically
close) by the knob.
MUTE
when muted, Bliss output stage circuit turns off, the output stops, input
cannot be changed, and volume cannot be adjusted. However, the power
consumption is essentially unchanged, and will maintain its hot (thermally
stabilized) state, which is optimal for sound quality.
VOLUME RDJUSRMENT KNOB
Turn the knob clockwise (right) to increase the volume (1dB per division)
or turn the knob coun-terclockwise (left) to decrease the volume (1dB per
division).
VOLUME SETTIMGS
The volume is adjustable in a range of 84dB, each step changes the volume by
1dB. Volume is the maximum when it is set to +12dB, and the minimum when it is
-72dB.
REAR PANEL
REAOMTE CONTROL
*This is a universal HOLCAUDIO Remote. The VODE (Mode select) outton is not applicable to the Bliss headphone amplifier.
CAUTION/CRITICRL PRODUCT NOTES User Caution; Product will get hot!
The Bliss requires air ventilation due to its high heat output, please take
note of its vent ports. Please leave 2 inches of space for proper airflow
around the entire chassis. DO NOT stack on top of HOT equipment, we recommend
its own separate shelf or space. Use attached file “Bliss Heat.jpg” as
reference, does not need to be used but format must be followed. Needs to have
front facing representation, with feet included.
