HOLO AUDIO Bliss Headphone Amplifier User Manual

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

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
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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

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)
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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)
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110-115V 50/60Hz — Use Fuse Type 4A SB 5x2Omm (when internal switches are set@110v)
Power consumption| 50W

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.

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