5
of filters, already discussed, affect the playback
system at the same time.
D.
LCR filters, which are used in the H-3000
V
:
Two pieces of a linear reactor (a kind of choke coil)
comprise the main part of these filters, assisted by precise
CR filters, in order to lower impedances and insertion loss.
In vacuum tube circuits, active and passive filters
usually are operated on one hundred plus kilo ohms of
impedance. An LCR equalization filter's impedance is a
constant 600 ohms.
Furthermore, an LCR equalization filter's series
resistance is less than 13 ohms (as a comparative, some
famous ones are 31 ohms). The lower the impedance,
the more dynamic is the sound reproduction, with
better bass response and speed.
But LCR equalization units have drawbacks as well.
These drawbacks are high cost and the difficulty of
impedance matching; the latter has been the primary
hindrance to the commercialization of this superb
method in the construction of phono stage amplifiers.
However, Allnic Audio manufactures high quality LCR
equalization units and has developed a 600 ohms
impedance matching method.
In addition, the H-3000V features:
The H-3000
V
Phono Stage is all transformer
coupled.
No negative feedback design with only two gain
stages
For superior signal to noise ratios, the H-3000
V
is
equipped with pure vacuum tube, high speed,
automatic voltage regulation for each channel and
a power supply unit separate from the phono
stage itself.
High quality MC Step-up Transformers with
Permalloy cores are used for the H-3000
V
’s dual
MC inputs.
New vacuum tube damping technology – Allnic
Audio’s patented "Absorb GEL tube damper"
technology prevents harmful vibrations from
reaching the signal / gain tubes and, therefore,
prevents micro-phonic noise propagation in the tubes.
The Allnic Audio Absorb Gel damper technology
effectively solves a problem that plagues most tube
amplification systems. Provided other tube
components do not introduce micro-phonic noise into
your system, with the Absorb Gel damping system, you
will enjoy a degree of transparent sound that will
surprise and please you.
Pure Class A operation
Pure balanced operation
As are all Allnic Audio products, the H-3000
V
is fully RoHS
(EU Reduction of Hazardous Substances regulation)
compliant in construction and materials
WHAT’S IN THE BOX?
Please check that the shipping box contains the following:
One (1) Allnic H-3000
V
phono stage – in natural
aluminum or black, depending on your order
specification
One (1) Power Supply for H-1500 II/H-3000 series –
in natural aluminum or black, depending on your
order specification
One (1) 5AR4 tube
One (1) power umbilical cord
One (1) IEC type power cord
One (1) Owner’s Manual
Note:
1)
The H-3000
V
phono preamplifier unit ships with
the tubes installed.
BEFORE!!! connecting the H-
3000V to the wall outlet, please open the
chimneys and remove the shipping O rings from
the tubes.
2)
The power supply ships with the 5AR4 packed
separately.
BEFORE!!! connecting the power
supply unit to the wall outlet, remove the power
supply cover and insert the 5AR4 in the socket.
3)
The H-3000
V
power supply will work with most IEC
type aftermarket power cords. Of course, only you
can determine the power cord that works most
synergistically with the H-3000
V
in your system.
4)
Be sure the H-3000
V
power supply unit is labeled
for the AC voltage of your location. If it is not,
please contact Hammertone Audio.
