Atoll PH100 phono stage

Atoll PH100 phono stage


Great value phono pre amp from Atoll, switchable settings for MM and MC loading via rear dip switches.


The PH100 phono preamp is an external module that has a specific power supply consisting of 2 high-end transformers (one per channel) with very low noise as well as 4 voltage regulators. The assembly is shielded by a metal box in order to preserve any interference on the audio stages. Entirely with discrete components, it does not include any link capacitors. The configurations (MM/MC, input impedance) are directly accessible from the rear of the chassis.

  • 4 mm brushed aluminium front.
  • 2 very low noise linear transformers 3,6 VA each.
  • 4 regulated power supplies.
  • Total of capacitors: 11 280µF.
  • Input impedance 47 k or 100 k (*).
  • Input capacitance: 100 pF or nothing (*).
  • High-level MC gain: 47 dB (*).

Low-level MC gain: 60 dB (*).

    • MM gain: 40 dB (*).
    • Signal/Noise ratio at 1 kHz 80 dB.
    • Crosstalk at 1 kHz < -82 dB.
    • Frequency response (20 Hz -20 kHz) <0.1 dB.
    • THD 0,05%.

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