Controller / Pre Amplifier (2010)
McIntosh’s engineers developed a new, fully shielded, low-noise MM/MC phono preamplifier that can handle medium-low-output (0.45mV) MC cartridges without needing a step-up transformer. Ultralow noise is claimed, thanks to the shielding and a dedicated double-filtered power supply. Both the tubed (four 12AX7s) and solid-state phono preamps are specced equally in terms of MM/MC input sensitivity, though the solid-state model’s signal/noise ratio is 88dB to the tubed version’s 80dB. Both offer the same loading facilities: for MM, 47k ohms, with 50–750pF in steps of 50pF; for MC, 25, 50, 100, 200, 400, or 1000 ohms, in parallel with 100pF.