Mobile Fidelity Sound Lab Ultradisc One-Step Supervinyl MoFi MFSL

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MoFi Ultradisc One-Step

Instead of utilizing the industry-standard three-step lacquer process, Mobile Fidelity Sound Lab's new Ultradisc One-Step (UD1S) uses only one step, bypassing two processes of generational loss. While three-step processing is designed for optimum yield and efficiency, UD1S is created for the ultimate in sound quality. Just as Mobile Fidelity pioneered the Ultra High-Quality Record (UHQR) with JVC in the 1980s, UD1S again represents another state-of-the-art advance in the record-manufacturing process. MFSL engineers begin with the original master tapes and meticulously cut a set of lacquers. These lacquers are used to create a very fragile, pristine UD1S stamper called a "convert." Delicate "converts" are then formed into the actual record stampers, producing a final product that literally and figuratively brings you closer to the music. By skipping the additional steps of pulling another positive and an additional negative, as done in the three-step process used in standard pressings, UD1S produces a final LP with the lowest noise floor possible today. The removal of the additional two steps of generational loss in the plating process reveals tremendous amounts of extra musical detail and dynamics, which are otherwise lost due to the standard copying process. The exclusive nature of these very limited pressings guarantees that every UD1S pressing serves as an immaculate replica of the lacquer sourced directly from the original master tape. Every conceivable aspect of vinyl production is optimized to produce the most perfect record album available today.

Ultradisc One-Step: The Future of Hi-Fi

Everything begins with the meticulous cutting of a set of lacquers for a strict number of records to be pressed. After being cleaned with a proprietary chemical, the lacquers are rinsed in de-ionized water and dipped in stannous chloride, enabling pure silver to adhere to the surface. This leaves a pristine, extremely intricate silver layer. The lacquer is then mounted onto a conductive copper bar and immersed into a tank with nickel anodes at 98 degrees. As electricity is applied to the silvered lacquer, the nickel begins to deposit onto the lacquer, while preserving the integrity of the grooves. The nickel-plated silvered lacquer is then placed into a high-speed rotary tank at 120 degrees and spun at 88RPM to ensure the even application of a nickel layer. Once the desired thickness of .012" is achieved, the disc is removed from the plating tank and the nickel convert is separated from the lacquer. At this point, the convert is formed into a single-use record stamper. This first-generation convert is used to make the pinnacle of audiophile vinyl that literally and figuratively brings listeners closer to the music.


MoFi SuperVinyl is a new proprietary compound developed by NEOTECH and RTI to address two specific areas of improvement: noise floor reduction and enhanced groove definition. The vinyl composition features a new carbonless dye (hold the disc up to the light and see) and produces the world's quietest surfaces. This high-definition formula also allows for the creation of cleaner grooves that are indistinguishable from the original lacquer. Mobile Fidelity Sound Lab feels SuperVinyl provides the closest approximation of what we hear in the mastering lab.

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