4
INTRODUCING THE T-2000 KT120 STEREO INTEGRATED
AMPLIFIER
The T-2000 stereo integrated amplifier is one of Allnic
Audio’s two KT120 stereo integrated amplifier models.
Like all Allnic Audio products, the T-2000 has Permalloy
(iron and nickel alloy) for its transformer cores. Allnic is
grateful to Mr. G.W. Elmen of Western Electric for
inventing Permalloy for transformer core use, and in so
doing, providing an enormous service to recorded
music listeners everywhere.
The T-2000 has the following features:
70 watts of high power output. The T-2000 is a push-pull,
triode/pentode switchable integrated amplifier.
Remote controlled 41 steps silver contact attenuator. The
T-2000 employs this house made quality attenuator,
instead of standard, outsourced carbon film
potentiometers. The Allnic attenuator provides complete
channel balance and less distortion.
Powerful Driving Circuitry. Allnic believes in the
importance of using high-quality, low noise and powerful
driving circuitry in all its amplifying devices. The T-2000
uses only two stages of driving circuit to a35dB of
voltage gain, instead of three or four stages as one finds in
many conventional integrated amplifiers. This results in
less coloration and more speed in signal/sound
reproduction. In the T-2000, we employ the D3a tube in
triode mode as the second stage driver tube, with a load of
about 5K ohms, and using 20mA of current. The listener
can easily hear and even "feel" the differences between
this design and other, more conventional, ones. Please
imagine, as you listen to the T-2000, its sound compared to
the sound of an integrated amplifier with conventional
12AU7 or 12BH7's used as drivers, with a load of about 47K
ohm, and using 2 to 3mA of current.
“Full Engagement" Output Transformers. Conventional
output transformers use pre-set secondary windings to
accommodate 4, 8 and 16 ohm loudspeaker loads.
However, these conventional transformers utilize
only one secondary winding at a time, while the other
secondary windings remain "idle". This approach has
two adverse effects. First, the output transformers are
not working at their maximum efficiency, reducing their
output relative to their potential. Second, the "idle"
windings are not actually "idle"; they are subject to parasitic
oscillations, producing their own "signal". This undesirable
electrical information is additive to the transformer's
output, distorting the amplified signal going to the
loudspeaker. Allnic's "Full Engagement" transformers
address these issues by having 4 independent, secondary
windings which are always fully connected, never "idled".
This means that all secondary windings are always
connected to your loudspeakers, regardless of which output
switch position you use (4 ohms or 8 ohms or 8 ohms or 16
ohms, depending on the factory configuration you have
selected). The result is that there is neither a loss of
transformer output efficiency, nor the introduction into the
output signal of distortion from parasitic oscillations of the
secondary windings.
Large Nickel/FeSi Core Output Transformers. As with our
other models, Allnic uses very large output transformers (96
mm) with nickel, mixed with FeSi, cores. This provides for
higher inductance with fewer windings than other designs
can provide and results in the great benefit of an extremely
wide range of output frequencies.
"Soft-start" Circuitry. Allnic uses soft start circuitry that,
after sufficient warm-up only, provides the high voltage
supply to the plate of each tube. This protective design
results in prolonged tube life and fewer and less frequent
issues with tube performance.
Analogue Power Tube Current Monitors. In order to
provide constant current (bias) monitoring for the power
tubes, Allnic uses a separate analogue current meter for
each tube. The meters make it exceptionally easy to see
the status of each tube at any time and to respond
immediately to any variation in bias by use of the bias
control knob for the relevant tube. The meters offer a
simple, unambiguous indication of each tube's status
compared to conventional LED bias monitors.
"On-the-Fly" Triode/Pentode Switching. Switching between
triode and pentode operation can be done "on-the-fly" at
any time while the amplifier is in use.
Beautiful 10KHz square wave response. See Figures 1-3.
As are all Allnic Audio products, the T-2000 is fully RoHS
(EU Reduction of Hazardous Substances regulation)
compliant in construction and materials.
