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ALLNIC AUDIO
HA-5000 Pre-Preamplifier (Head Amplifier)
OWNER’S MANUAL
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ALLNIC AUDIO
HA-5000 Pre-Preamplifier (Head Amplifier)
Thank you for purchasing this Allnic Audio HA-5000 Head Amplifier. We are
certain your trust in Allnic Audio and Audiomentors, as well as your
appreciation for the sound of this high-quality device, will be rewarded by
its excellent operation for years to come.
Please read this entire manual before you connect the HA-5000 head
Audiomentors
8-3 Sunae-dong, Bundang-gu, Seongnam-si, Gyeonggi-do,
Korea
+82-31-716-3311
www.allnic.co.kr
www.audiomentors.co.kr
*Information and specifications for the Allnic Audio
product described in this manual are subject to
change without notice.
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TABLE OF CONTENTS:
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_
INTRODUCING THE
HA - 5000
PRE
-
PREAMPLIFI
ER 4 ________________________________________________________________
_
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WHAT’S IN THE BOX?
5
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____
SAFETY
5
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______________________
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_____
CLEANING
Chassis
Connectors
5
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INITIAL SET
- U P
Location, Location, Location
Inputs
Outputs
5
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OPERATION
6
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_______________________________
_________________________
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SPECIFICATIONS
6
______________________________________________________________
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WARRANTY
7
Please read about
SAFETY
before you attempt to use the
HA - 5000
Pre
-
preamplifier (Head Amplifier)
-
we care about our customers and the
equipment, and we want you to enjoy this product for a long time!
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INTRODUCING THE HA-5000 HEAD AMPLIFIER
The HA-5000 is Allnic Audio’s pre-preamplifier, or “Head
Amplifier”. It is an active, tube based device for
amplification of low voltage signals from moving coil
cartridges to allow connection of moving coil cartridges
to the moving magnet inputs of a phonostage, such as
the Allnic H-7000 or H-1500. The HA-5000 is an active
pre-preamplifier, not a “step-up transformer” like
Allnic’s AUT-2000, which uses only a transformer to
boost the signal from the cartridge.
The HA-5000 has the following features.
• Innovative Fixed Bias Circuit
In the HA-5000, two nuvistor 7895(6CW4) tubes, the
smallest vacuum tube, perform as amplifying devices. They
magnify the tiniest signal in audio, the output voltage of MC
cartridges, to match to the MM input of phono
stages. Allnic applies its innovative, fixed bias circuit to
achieve quiet and stable operation of the extremely
sensitive 7895 tubes. The fixed bias circuit eliminates the
subsonics so harmful to phono stages and inherent in the
characteristics of the R.I.A.A curve, which requires
amplification of the lower frequencies. The fixed bias circuit
applies a sustained negative DC voltage to the grid of the
tubes and to the input coupling capacitors, blocking
capacitor “crossover distortion". This distortion is a
common phenomenon but, unfortunately, is often
neglected in pre-preamplifiers. The result of no "zero
crossover distortion" is, simply, clearer and more vivid
reproduction of the music.
• Very High S/N Ratio
The above mentioned characteristics of the R.I.A.A curve
demand a hum-free pre-preamplifier and, therefore, a silent
power supply circuit. Even one micro volt (1/1,000,000 of
one volt) of hum noise (120Hz hum) in the output signal of
a pre-preamplifier will result 63mV to the loud speakers.
That is unacceptable, and Allnic has overcome the issue
through its automatic pure vacuum tube voltage regulation
circuitry. This voltage regulation circuit minimizes power
supply hum noise to inaudibility.
• Extreme Wide Frequency Range
Though the HA-5000 has a single gain stage and no
negative feedback, its frequency range capability
extends from 15Hz to 125Khz(-3dB), revealing the full
richness of the musical information on vinyl.
• World unique 2 MC inputs
Without any hum or switching “popping” noise. You can
play two MC cartridges with convenience.
• Ultra Flexibility
The capability to follow an unpredictable musical
signal with ease is strongly believed to be the heart
of musicality for audio equipment. This ability can
be indicated by square wave response at high
frequencies, especially at 10Kh and the even more
rarely achieved 20Khz. Exceeding these
expectations, Allnic’s HA-5000 shows a response
shape that is, even at 100Khz, in a word, beautiful.
• Micro-Phonic Free Tube Damping Know-how
Allnic’s Absorb-Gel® tube damping know-how
culminates in the HA-5000. In the HA-5000, an
extreme version of this mechanical technology
applied, reducing vibration induced noise in the
sensitive tube amplification circuit to a level never
before realized.
• Variable Input Load Impedances.
The HA-5000 has four input load impedances: 50,
100, 200, and 800 ohms, selectable from a control
on the front panel. This allows loading according to
the output impedances of your MC cartridges.
Furthermore, these loads are purely resistive, not
the compound one of a step-up transformer,
resulting in a pure and clean sound.
• As are all Allnic Audio products, the HA-5000 is
fully RoHS (EU Reduction of Hazardous
Substances regulation) compliant in construction
and materials.
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The HA-5000 has been designed and manufactured to work
most synergistically with other Allnic Audio products, for
example the Allnic phono stages and preamplifiers.
WHAT’S IN THE BOX?
Please check that the shipping box contains the following:
• One (1) Allnic HA-5000 Head Amplifier – in natural
aluminum or black finish in accordance with your
order
• One (1) Allnic HA-5000 Head Amplifier Power
Supply Unit – in natural aluminum or black
finish in accordance with your order
• One DC umbilical cord
• One (1) power cord
• One (1) Owner’s Manual
We advise that you keep the box and other packing
materials that your HA-5000 came in. It will be useful if
you sell your HA-5000 or in the unlikely event you need to
ship it for service.
SAFETY
• Disconnect all cables by pulling the plug, not the
cable.
• Keep the cables away from any heat source.
• Keep the unit away from liquids – do not allow any
liquid to enter the interior of the unit.
• Do not attempt any repairs.
• Do not remove the cover without specific
authorization from Allnic Audio.
• See the notes on “Location, Location, Location”.
CLEANING
A. Chassis
Use only a soft, lint-free cloth dampened slightly with water
only (NO cleaning fluids!) to clean the faceplate and chassis.
B. Connectors
You may use any good quality contact cleaner
recommended for such applications to clean the contacts
from time to time, as you deem appropriate.
INITIAL SET-UP
A. LOCATION, LOCATION, LOCATION
Like all sensitive audio products, the Allnic Audio HA5000 and its power supply should be placed on a solid
stand.
• DO NOT place the units on carpet or foam.
• DO NOT subject the units to knocks and shocks as
you move them around. This advice is meant
particularly for those who may want to place the
HA-5000 on some kind of after-market isolation feet
or similar devices. Dropping one side of the HA5000/power supply, or the whole unit, is not a good
thing to do.
• DO NOT place the units near a strong light or heat
source.
• DO NOT place anything heavy on the units.
• DO NOT allow rubber or vinyl materials to rest on
the units’ chassis for long periods of time. This could
discolour the metal.
• DO place the units on a shelf or stand that is stable
and not subject to vibration or sudden shock.
• DO consider using high quality interconnects for
both inputs and outputs. The HA-5000 is a highly
sensitive piece of electronic equipment designed for
neutrality and will output what you put into it.
• DO try to place the HA-5000 away from major
sources of RFI and EMI; though very well shielded,
the HA-5000 units will function best away from large
power transformers and other sources of such
interference.
B. INPUTS
In the centre of the four RCA connections on the rear of
the HA-5000’s chassis is a screw type connector. This
connector is the ground connection for a ground wire
from a cartridge and/or turntable.
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There is one (1) pair of single-ended (RCA) inputs. The right
and left channel input connections are the bottom pair of
RCA connections, below and to the left and right of the
ground connection. The left channel input connection is on
the right of the unit, facing the HA-5000’s rear panel (on the
left if you are facing the front of the unit). The right channel
input connection is on the left of the unit, facing the HA5000’s rear panel (on the right if you are facing the front of
the unit).
C. OUTPUTS
The HA-5000 is equipped with one pair of single-ended (RCA)
outputs. The right and left channel output connections are
the top pair of RCA connections, above and to the left and
right of the ground connection. The left channel output
connection is on the right of the unit, facing the HA-5000’s
rear panel (on the left if you are facing the front of the unit).
The right channel output connection is on the left of the unit,
facing the HA-5000’s rear panel (on the right if you are
facing the front of the unit).
Power
Be sure the HA-5000 power supply power button switch is
in the “off” position (“out”- not depressed) before
connecting the IEC equipped power cord to the rear of the
power supply. The HA-5000 power supply unit uses a
standard IEC AC connection. The DC umbilical cable to the
pre-preamplifier unit is fixed to the rear of the power supply
and connects to the rear of the pre-preamplifier unit. The
umbilical cable must be inserted snugly into the connector
on the rear of the prepreamplifier unit and then secured,
using the screw collar around the connector.
OPERATION
Be sure you have turned the volume down or otherwise
muted your preamplifier before connecting the HA-5000.
Also, make sure all your connections are snug.
At this point, if you have not already done it, turn the front
panel load selection control knob to the loading factor that
you think will work for your moving coil cartridge.
The HA-5000 has four input load impedances: 50, 100, 200,
and 800 ohms, selectable from a control on the front panel.
You may need to experiment with different load
settings to find the one best suited for your cartridge.
Turn on the HA-5000 by pressing down the button on the
front panel of the power supply unit to the “on” position.
The running LED on the front of the pre-preamplifier unit
will illuminate.
From this point on, operation is straight-forward. Of
course, always be sure you have turned the volume down
or otherwise muted your preamplifier before changing
loads with the front panel control.
In the case of any failure, please contact Allnic Audio.
SPECIFICATIONS
FOR THE ALLNIC AUDIO HA-5000 HEAD AMPLIFIER
Inputs: MC (Moving Coil – unbalanced
(RCA) × 2 pair
Outputs: Unbalanced (RCA) × 1 pair
Ground: Screw Type x 1
Frequency Response
Range :
15KHz to 30KHz, flat
Voltage gain :
30 dB
S/N Ratio :
Tubes:
More than -100 dB (CCIR)
Pre-preamplifier:
2 x Nuvistor 7895 (equivalent
6CW4)
Power Supply:
2 x 7233 (no equivalent); 2 x
6BH6 (equivalent CV 3908)
Maximum Input Voltage:
530mV (20Hz ~ 20KHz)
NonClipping
Input Load Impedances:
Dimension and Weight
50, 100, 200 and 800 Ohms
selectable
(each unit): 215mm(W) Ⅹ290mm(D)
115(H)
Weight Pre-preamplifier
unit: 2.5Kg (5.5lbs)
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Weight Power supply: 5.8Kg (12.7 lbs) AC Power Requirement : 120/220 VAC - 50/60Hz
(depending on factory setting)
WARRANTY
All Allnic Audio amplifier products are warranted against materials and manufacturing defects for
parts, excluding tubes, and labour for two (2) years from date of purchase. Tubes are warranted
against materials and manufacturing defects for one (1) year from date of purchase. The warranty is
transferable for the balance of the original purchaser’s warranty period, provided, as stated below, no
unauthorized repairs or modifications have been performed on the product. Date of purchase is the
date indicated on the invoice for the product issued by Allnic Audio.
For the warranty to be valid, a defective product must be returned to Allnic Audio for service prior to
any unauthorized attempt to repair. Any repair work on an Allnic Audio product not specifically
authorized by Audiomentors will void the warranty on the product.
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