MEASUREMENTS
Sep 10, 2019
4 minutes
—John Atkinson
on Sutherland refers to his Little Loco phono preamplifier as a “transimpedance” amplifier, which means that it amplifies a current rather than a voltage—, the input signal is a current and the output signal is a voltage. Phono preamplifiers almost all use voltage-amplification circuitry. However, as a moving-coil cartridge inherently generates an output current, sourced from a very low impedance, it makes sense for a moving-coil phono preamplifier input stage to operate in current mode rather than voltage mode. I measured the Sutherland Little Loco using my Audio Precision SYS2722 system (see , and the January 2008 “As We See It”1).
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