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UNIT CONNECTIONS AND CONTROLS:

from +10dB to +64dB. Please note that left and right channel gains cannot be stereo linked

(ganged) on the FEMTO

5. OLED display screen. This screens shows an indication of the audio levels of both channels and

voltage of the power supply. The voltage indicator will turn red when the unit is powered from it's

internal batteries and if the battery level is to low. The user should then replace the batteries as

soon as possible. The low voltage threshold is set to 13.5V (2 x 6.75V). This threshold is

compatible with rechargeable Lithium-polymer batteries.

6. Batteries compartment. This compartment is designed to receive 9V 6LR61 or PP3 batteries.

Audioroot recommends using alcaline or high power rechargeable lithium-polymer batteries. Please

respect the + and – polarities. Never leave batteries in the unit during storage. Use only first

choice alcaline or rechargeable batteries.

7. External power DC input connector. The FEMTO ships by default with a Hirose type power input

socket connector. Customers can also order the FEMTO with a Switchcraft locking barrel type

socket (as seen here on the

picture).

The Hirose mating connector

reference is HR10A-7P-4P or

HR10-7P-4P.

The Switchcraft mating connector

reference is 760K.

The FEMTO can be powered thru

this connector with an external

voltage of 12 to 18V. Internal

batteries are automatically

disconnected when an external

power supply is connected to the

unit. The DC IN input is protected

against polarity reversal.

Power socket pinout :

Hirose connector pinout : 1 = (-), 4 = (+)

Switchcraft connector polarity : inner = (+) , outer = (-)

8. 48V phantom power switch.

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1. Left input gain level adjustement

potentiometer. Gain can be adjusted

from +10dB to +64dB. Please note

that left and right channel gains

cannot be stereo linked (ganged) on

the Femto

2. On/Off power supply switch. This

switch activates internal powering of

the unit.

3. Low cut filter selection switch.

OFF position: filter off line

◦

ON position: filter in line

4. Right input gain level adjustement

potentiometer. Gain can be adjusted