The MD 609T XM Radio
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larger view of the MD609T XM Radio
XM Radio
From our legacy in pure audio reproduction, we are proud to present another significant introduction to the Magnum Dynalab collection of source audio products.
Introducing the MD 609T XM Radio Tuner. Featuring sonic imaging, soundstaging and a window into the world of entertainment never before realized in any satellite xm radio device. |
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With our pioneering Digital Interface Board, an analog audio stage producing unbridled sonic clarity and finesse, and an XM radio module providing listeners with a stirring assortment of stations available almost anywhere in North America, this is truly a product worthy of inclusion in our line-up of high-performance source audio products.
Given the current rate of evolution among source audio products, we have observed many high-performance audio manufacturers spend the bulk of their R&D working towards the capturing, rendering and control of various digital media. While critically important to any high-performance, digitally-driven audio product, many manufacturers do not use the same rigor when designing the analog essentials. Our purist philosophy and the fastidious attention to detail to the analog signal path following the conversion from its digital source is what distinguishes a Magnum Dynalab product. The MD 609T XM Radio is a product for music lovers, providing a sound entertainment experience that will change your view of XM radio.
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With 20 XM radio presets, the ability to browse by both station and genre, and a 4.2" blue LCD display featuring all relevant metadata including channel, category, artist and track, the MD 609T XM Radio is as functional at it is melodic. The product's stately symmetry is characteristic of many Magnum Dynalab products, with a large machined button used for power on/off, plus similarly tactile buttons for menu, select, station up/down and category up/down. All functions are also controlled by way of a handsome IR remote.
The MD 609T XM Radio is also equipped with a RS232 port that allows control of the Tuner from a variety of devices including Whole-House A/V Distribution and Home Automation Systems, or just about any hard-wired device capable of outputting RS232 commands. All relevant protocols are available in our MD 609T/MD 606T Installation Guide.
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With delicate and fastidious detail, our 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 609T XM Radio, 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 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:
Signal to noise ratio > than 110 dB, the micro information from the original signal is maintained.
Zero phase shift from 0.2 Hz to 200KHz
Zero distortion variance from 0.2 Hz to 200KHz
The demanding level of signal movement requires a solid foundation, necessitating double sided 0.093 thick printed circuit boards, providing the base to 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 609T XM Radio includes a collection of components supplied by world leaders Mundorf, WBT, Wima, Dale-Vishayand and Burr Brown. For example, 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.
The 6922 tubes employed are unique in the true sense of the word. Each MD Reference Cryovalve tube undergoes a cryogenic freezing process, whereby the stresses interior to the materials of the tube are substantially and permanently relaxed. The process also involves the cleaning and polishing of all pins, improving contact quality and ultimately resulting in substantial sonic improvement. To minimize the stress on the tube during normal operation and also to ensure long
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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.
The high quality demands of our TRACC technology necessitated a Digital
Interface Board that provided the same high level of performance.
Developed in-house, 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 extremely high-performance
audio standards. And when combined with the Burr Brown PCM1794, 200kHz
current output Delta-Signma over-sampling DAC for audio rendering, and
the OPA627 integrated circuit, the result is a perfectly clocked,
incredibly accurate signal that is virtually jitter-free.
We have also taken special care to design the digital front-end of the
device (the section that receives and renders the satellite radio
signal) of the MD 609T XM Radio to be replaceable if necessary. That is, should
there be changes to the source feed of Satellite radio, we at Magnum
Dynalab are committed to providing those upgrade options to all
customers.
The importance of this stage cannot be understated. The creation of a clean, continuous source of DC power that is free of ripple at all frequencies ensures that associated downstream components can 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. A solution without capitulating to compromise was needed. |
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To deliver on this challenge, our Director of Audio Design Zdenko Zivkovic concentrated much of his efforts on the ground plane. A unique loop that connects all components in the device, including the power supply, tube output stage and digital interface board is designed to eliminate the inherent ripple resulting from grounding circuits looping back into the chassis. The result is that all sources of impurities that originate with the ground plane are eliminated, once again leaving only the purity of the original signal. This eliminates any transients and mysterious high frequency noises, resulting in a level of purity that is as close to a direct battery supply as imaginable. In addition, to insure that the audio signal is isolated, all inputs and outputs are isolated from the chassis with a special insulator.
Finally, a custom designed Toroidal transformer is employed to provide pure power to the distinct sections of the device, with secondary windings matched perfectly for the specific voltage requirements of the unit.
With access to over 170 channels in the USA, and up to 100 channels in Canada, XM Radio provides a wealth of listening options. Broadcasted in the S band using the frequencies ranging from 2332.5 to 2345.0 MHz, XM radio employs 3 satellites hovering in geostationary orbit plus a network of ground-based repeaters. Coverage includes all of continental US, the southern tip of Alaska, all of Southern Canada, plus many of the Caribbean Islands and most of Mexico.
To activate XM Radio in USA:
On-line: www.xmradio.com
Phone: 1-800-XM-RADIO, 1-800-967-2346
To activate XM Radio in Canada:
On-line: www.xmradio.ca
Phone: 1-877-GET-XMSR (1-877-438-9677)
Find a Magnum Dyanalab dealer near you
or call us Toll Free in North America: 1-800-551-4130
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