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Audioroot FEMTO battery powered stereo microphone preamp with 48V phantom power
€ 627.99 Our Price € 519.00 Our Price

The FEMTO is a high quality battery powered mic preamp that was designed for location sound recording ( ENG, EFP, music, etc.). It combines in a single box a high gain - low noise microphone preamp with 48V phantom powering, a 80hz 12dB/oct high pass filter and a beautiful OLED screen for audio and battery level information display. The FEMTO was designed to resist over time and against the harshest environments.

The FEMTO's premium electronics are protected by a lightweight powder coated aluminum extruded enclosure. Markings are directly engraved on the aluminum face panels to resist over time. The AUDIOROOT FEMTO is a high gain mic preamp with a default minimum gain setting of +10dB.


  • dual high gain/low noise mic preamp (+10 to + 64dB)
  • 48V phantom powering
  • 80hz 12dB/oct high pass filter
  • bright OLED screen (sunlight readable)
  • 2 mic inputs on XLR3 connectors
  • balanced line level output on XLR5 connector
  • high quality audio potentiometers
  • superb powder coated and engraved aluminum enclosure
  • lightweight small footprint
  • power efficient ( 6 hours autonomy with 2 Schoeps CMC64Ug)


  • weight (without batteries) : 327g
  • dimensions : 95 x 129 x 42mm (l x p x h)
  • powering: 2 x 9V batteries (type 6LR61) or external (12-18V)

A balanced line output cable XLR5 -> 2 x TA3F) is included for every purchase of an Audioroot FEMTO

Recommended external 100-240V PSU (not included) : MEAN WELL GE12I18-P1J

  • input impedance : > 5kohms
  • min gain : 10dB
  • max gain (Zsource = 50R, Zload =600ohms) : > 64dB
  • distorsion : 0.002% < 40dB gain / 0.006% @ 60dB gain
  • equivalent input noise EIN : -129.2dBu @ gain max (Zsource = 200Ohms)
  • bandwidth / bande passante (+/3 dB) : 15Hz 20kHz
  • max ouput level / niveau de sortie max (Zload = 600R, Vpower = 16V) : +18dBu
  • power consumption (external powering = 18V) : 48V off : 44mA / 48V on + 2 Schoeps CMC6Ug : 82mA
  • power consumption (internal powering ) : 48V off : 31mA / 48V on + 2 Schoeps CMC6Ug : 67mA
  • external power connector : Switchcraft barrel or Hirose 4 pin connector

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