Dispelling a myth (?) about phono-cartridge loading

Dispelling a myth (?) about phono-cartridge loading

In the midst of his December 2023 Gramophone Dreams column, Herb Reichert presented the results of an experiment. He was listening to the most recent version of Zu Audio's Denon DL-103, installed on his new-old Lenco. He hooked it up to the moving coil input of his SunValley SV-EQ1616D phono preamp, which apparently is intended for use with low-output MC cartridges since it loads them down with a 50 ohm shunt resistor—a heavy load for all but the lowest-impedance MCs. The rough rule of thumb for loading an MC cartridge, as many readers are aware, is that the load resistance should exceed the cartridge's internal impedance by about a factor of 10.

Musical Fidelity Nu-Vista 800.2 integrated amplifier

Musical Fidelity Nu-Vista 800.2 integrated amplifier

I first met Musical Fidelity's founder, Antony Michaelson, in 1978, when he was running tube amplifier manufacturer Michaelson & Austin. I still have an M&A TVA-10 amplifier, which was designed by the late, great Tim de Paravicini. Soon after Antony founded Musical Fidelity in 1982, he employed de Paravicini to design the A1 integrated amplifier.

The A1 was a slim solid state design with a class-A output stage that output 20Wpc into 8 ohms. By contrast, the massive, dual-mono Musical Fidelity Nu-Vista 800 integrated amplifier, which Michael Fremer reviewed for Stereophile in November 2015, featured nuvistor tubes for its small-signal circuitry, coupled with a solid state, class-AB output stage that could deliver 330Wpc into 8 ohms.

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