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The predecessor and backbone of the new MD 108T Triode Tube FM Tuner , the MD 108, is one of the most
successful standalone FM tuners we have ever introduced. It has been a staple of the Magnum Dynalab
collection for over 10 years and the first of our tuners to employ the distinctive and incredibly precise
MAGIC EYE tube for tuning, and also the first of our products to utilize a separate audio stage within the
unit.
In 2005, the Magnum Dynalab design team took this discrete audio stage to the next level. Our
proprietary TRACC technology (Triode Reference Audio Control Center) was introduced first with the launch
of the MD 109, and this innovative design has resulted in our most impressive audio output ever. With our
most inspiring audio section now available to the market, we felt it appropriate to apply this new
technology to some of our classic Analogue FM tuners. Introducing the MD 108T.
In addition to the
inclusion of the TRACC audio section (also found in the MD 109), we have also utilized an ultra-stable
power supply, a new RF design with greater sensitivity, closer tolerances for the critical components, and
a thicker printed circuit board with gold plated solder pads. Finally, a true differentially balanced
circuit utilizes the full influence of the Triode tube design and insures that the balanced signals are
perfectly matched - thus realizing the full benefit when used in a balanced system.
Building on the
MD 108 FM Tuner, the six stage front end is yet another improvement on a proven design. With three
ultra-sensitive bandwidth settings and enhanced selectivity, you are ensured the best possible signal from
either of the two analog antenna inputs. Plus, the MD 108T is equipped with two digital antenna inputs for
future upgradeability. A muting circuit eliminates unwanted inter-station noise, and to provide a visual
cue of the devices operation, the MD 108T employs two accurately calibrated taut band analog meters to
indicate multipath and signal strength. In unison with these meters, a unique dual MATRIX EYE tube for
centre tuning means there is little guess work in optimizing FM reception.
This degree of
customization in an FM tuner is only made possible by the fact that we at Magnum Dynalab continue to design
and manufacture all of our RF front-ends in-house. Coupled with the impressive collection of critical
components used throughout the device, it leads to an impressive list of primary highlights.
* Dual MATRIX EYE Tube Tuning: A unique and precise vacuum tube used to ensure that the RF front-end of the device is tuned perfectly for each RF frequency.
* Three Ultra-Sensitive Bandwidth Settings: Wide, Narrow and Super-Narrow to ensure that the front-end of the tuner is able to collect the ideal amount of RF signal according to the specific listening conditions for each station.
* Low Noise Dual gate MOSFETS: Transistors in the front-end of the tuner are specially selected to ensure that boosts in gain of the primary signal are not accompanied by a boost in adjacent noise, ensuring a strong signal without interference.
* Custom "Potted" Torroidal Transformer: A secure platform from which to deliver perfect voltages to all critical components throughout the device via an overbuilt custom transformer.
* Six Stage Tuning Front End: Six stages of RF filtering to ensure only the purest signal is delivered to the audio stage, all delivered via a custom designed and manufactured RF front end.
* Custom Ultra-Linear Power Supply: A pure source of DC power throughout the device is of critical importance when supplying current. Our stable power source not only allows the tubes to perform at a consistently high level regardless of the dynamic changes in the music, but is also properly shielded and grounded to eliminate any transient signals.
* Two Analogue Antenna Inputs: Easy switching between two antennas, which can be placed in different locations throughout the home for maximum signal capture for specific stations.
* Hand Matched Resonators: For variable bandwidth selections (Wide, Narrow and Super-Narrow), resonators have been hand matched to ensure the signal gain is consistent in all products we build according to our exacting specifications.
* Auto Blend RF quieting circuit: In stereo mode, this unique circuit removes adjacent channel noise and stray frequencies from impacting the clarity of the primary signal by systematically adjusting the degree of channel separation.
With delicate and fastidious detail, Zdenko Zivkovic's purist philosophy has established a truly
unique design that realizes zero influence on the original signal. Our major design differentiator is not
insignificant… to our knowledge, we are the world's only audio manufacturer to eliminate capacitors after
the gain stage of the tubes.
The inclusion of capacitors in any audio stage results in a
variable impedance across the frequency range. That is, output impedances can vary anywhere between 10 and
20 times from high to low frequencies, putting additional stress on interconnects, and altering the tonal
subtleties of the sound stage across the spectrum. In the MD 109, direct current from the MD Reference
Cryovalve 6922 tubes is delivered without the altering impact of output capacitors, resulting in incredibly
low impedance (200 ohms) that is flat across the frequency range (0.2Hz to 200KHz). This flat impedance
also eliminates the influence of the interconnects, resulting in a signal that is virtually identical to
that which was originally recorded in the studio.
This unique design forms the backbone of our
Triode Reference Audio Control Center (TRACC) technology, which is used in only our MD 108T and the MD 109.
It is, quite simply, the most accomplished analog audio stage we have ever developed. In addition to its
low impedance, it boasts a host of other impressive specifications:
1.
Signal to noise ratio > than 110 dB, the micro information from the original signal is maintained.
2. Zero phase shift from 0.2 Hz to 200KHz
3. Zero distortion variance from 0.2 Hz to 200KHz
This demanding
level of pristine signal movement requires a solid foundation. Double sided 0.093 thick printed circuit
boards provide the base and minimize potentially damaging vibration. With isolation insured, individual
components can perform as planned without unbridled influence from neighboring elements and activity. To
maximize conductivity and insure that all micro-information is maintained, ceramic tube sockets and all
circuit board contacts are generously gold plated. Special feet have been designed using Vibrapod Isolators
to insure that the performance is not comprised from external vibration.
Without compromise, the MD
108T includes a collection of components supplied by world leaders Mundorf, WBT, Wima, Dale-Vishayand and
Burr Brown. In the critical areas of the audio board before the tube stage we use the Mundorf
Supreme/Silver/oil polypropylene dielectric capacitors and as the name indicates, high purity silver is
used for the capacitor coating. The winding is impregnated with a special oil, and these features
contribute to an even fuller and smoother tonal richness and diversity. Along with their collective ability
to move sound while maintaining the purity of the original signal, these components are highly regarded for
extensive unwavering performance over the long haul.
To minimize the stress on the tube and insure
long tube life a special turn on circuit is incorporated that has a very slow rise time slope. This brings
the tube up to the optimum operating current at a very controlled and safe rate. In addition to this
notable design feature, our audio tubes themselves are different. Designed and manufactured specifically
for Magnum Dynalab, our 6922 Reference CryoValve tubes have been through an exclusive process before
landing in the TRACC circuit board. Each tube passes through a series of operations, including a 100 hour
cryogenic treatment process at -320oF. This reduces microphonic effects, lowers the dynamic noise floor and
increases the 'apparent gain' to greatly relax and improve the dynamic and low level resolving power.
Further, the pins have been individually cleaned back to base metal and polished for much improved contact
quality and sonics.
The audio stage of the MD 108T is the best we have ever created. A testament to
our long-standing experience in the treatment of the analog signal path, the end result is a sound stage
that puts the MD 108T in a class of audio electronics inhabited by very few.
In nature to his craft
and passion, Director of Design Zdenko Zivkovic concentrated much of his efforts on the ground plane. By
creating a unique grounding loop that eliminates the inherent troubles with chassis grounding, all sources
of impurities that originate with the ground plane are eliminated, once again leaving only the purity of
the original signal. What characterizes the 108T is how free the sound is of any transients and mysterious
high frequency noises. To ensure that the audio signal is unobstructed, all inputs and outputs are isolated
from the chassis with a special insulator. To ensure that accurate voltages are supplied to the distinct
areas of the tuner, two custom designed Toroidal transformers are employed; one to drive the TRACC audio
stage, one to drive the RF and control board.
As you can appreciate, the importance of this stage
cannot be understated. It feeds and allows all associated downstream components to perform at their highest
level notwithstanding the unpredictable demands placed on it by the dynamics of the music. Throughout the
history of high-fidelity innovation, power supply purity and management have proven to be one of the
greatest challenges for designers, and the 108T handles this challenge with precision and accuracy.
The MD 108T FM Tuner is specially packaged in an instrument-case to ensure the safety and care of the
product.
Upon closer inspection of the MD 108T FM Tuner, one will find it equipped with a digital
source module on the back panel, and 2 additional digital inputs available for selection on the front
panel. This allows our manufacturing group to equip the MD 108T with an optional DAC, enabling the device
to interface with any peripheral digital source. Our in-house designed DAC has been designed to provide the
same high level of performance as our TRACC analog technology. This unique circuit board uses two industry
leading core components for the receiving and rendering of the digital signal, with the front end of the
board driven by the CS8416 192kHz Digital Audio Receiver from CIRRUS Logic; capable of DVD Audio
performance standards. And when combined with the Texus Instruments PCM1792, 200kHz current output
Delta-Signma over-sampling DAC for audio rendering, the result is a perfectly clocked, incredibly accurate
signal that is virtually jitter-free.
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Questions?
1.973.239.1799
