A little MFSL History...
In November 1999 MFSL was forced to close its doors after it was unable to collect a large sum of money and product upon the bankruptcy of M.S. Distributing, one of its biggest distributors. At this time many unsold items were liquidated as cut-out items through discounters. At the same time other dealers also charged premium prices on the collectors market for the most rare and highly acclaimed titles. In 2001 the company's assets were acquired by the audiophile products company Music Direct, of Chicago, operated by Jim Davis. Music Direct now owns rights to the technology used in the proprietary mastering chain and all intellectual property owned by Mobile Fidelity Sound Lab.
Herbert A. Belkin died in 2001 of a heart-attack at age 62. Mobile Fidelity has continued to produce Super Audio CDs, GAIN 2 Ultra Analog Limited Edition vinyl, Ultradisc II Gold CDs and Ultradisc CD-Rs since the company was re-established.
After listening tests and technical evaluations, Mobile Fidelity engineers decided to adopt the Super Audio CD over the DVD-Audio disc as a high resolution digital format. As with some other audiophile labels (such as Analogue Productions), Mobile Fidelity is of the opinion that Direct Stream Digital is sonically superior to Pulse-Code Modulation audio. On the label's Hybrid SACD releases, the SACD layer is a direct DSD recording of the analog master tape, while the CD layer is a digital down conversion of the DSD, with Super Bit Mapping applied. Post 2001 CD-only are sourced from DSD, but omit the SACD layer.
Since 1998, Mobile Fidelity has been using Studer A-80 ¼ inch tape machine, which was custom modified by audio designer Tim de Paravicini. The deck features custom high bandwidth playback heads and custom playback electronics. This machine exhibits frequency response, which is essentially flat from 10 Hz-44 kHz. Using this tape machine and a record cutting system (also designed by Pravicini), Mobile Fidelity engineers accidentally cut a 122 kHz tape bias tone onto a record lacquer. Mobile Fidelity has revisited several albums with their new mastering chain that were previously released on the old UltraDisc 2 system. Some listeners have noted that the new mastering chain exhibits a 'tighter' sound, particularly in the bass frequencies.
Original Wikipedia link