Fostex FM-3 owner manual Specifications, Inputs/Outputs, Performance, Others

Specifications

Inputs/Outputs

* 0dBu = 0.775Vrms

<Analog Inputs>

INPUT 1 through INPUT 3

• Connector: XLR-3-31 type (transformer balanced)

<LINE input>

•Input impedance: 10 kΩ or more

•Nominal input level: -20 dBu to +4 dBu

•Maximum input level: +29 dBu

<MIC input>

•Input impedance: 2 kΩ or more

•Nominal input level: -70 dBu to -30 dBu

•Maximum input level: -5 dBu

AUX IN

•Connector: XLR-5-51 type (electronically balanced)

•Input impedance: 20 kΩ or more

•Nominal input level: +4 dBu

•Maximum input level: +29 dBu

RTN

•Connector: ø3.5mm stereo mini-phone jack (unbalanced)

•Input impedance: 10 kΩ or more

•Nominal input level: -10 dBV

•Maximum input level: +15 dBV

<Analog Outputs>

MAIN OUT (L, R)

•Connector: XLR-3-32 type (transformer balanced)

•Applicable load impedance: 600 Ω or more

•Nominaloutputlevel:+4,0,-20or-60dBu(switchable)

•Maximum output level: +24, +20, 0 or -40 dBu (switchable)

SUB OUT

•Connector: XLR-5-52 type (electronically balanced)

•Applicable load impedance: 10 kΩ or more

•Nominaloutputlevel:+4,0,-20or-60dBu(switchable)

•Maximum output level: +24, +20, 0 or -40 dBu (switchable)

TAPE OUT

•Connector: ø 3.5mm stereo mini-phone jack (unbalanced)

•Applicable load impedance: 10 kΩ or more

•Nominal output level: -10 dBV

•Maximum output level: +10 dBV

AUX OUT

•Connector: ø3.5mm stereo mini-phone jack (unbalanced)

•Applicable load impedance: 10 kΩ or more

•Nominal output level: -10 dBV or -60 dBV (switchable)

•Maximum output level: +10 dBV or -40 dBV (switchable)

PHONES

•Connectors : 1/4” stereo phone jack and ø3.5mm stereo mini-phone jack

•Applicable load impedance: 8Ω or more

•Maximum output power: 50mW (at 32Ω load, THD: 0.1% or less）

<Others>

DC IN

•Connector: XLR-4-32 type (male)

•Input voltage: DC10V to DC 24V

DC OUT

•Connector: Hirose 4 pin (female)

*Applicable plug: Hirose HR10A-7P-4P

•Output voltage: DC7.2V - 24V (Max. 0.5A)

Performance

Frequency response

• LINE IN - MAIN OUT:

20Hz to 20kHz +/- 1dB (reference level)

• MIC IN - MAIN OUT:

40Hz to 20kHz +/- 1dB (reference level)

•HEADPHONES (32Ω load, 25mW output power):

20Hz to 20kHz +/- 3dB

S/N ratio (A-weighted)

•LINE (INPUT GAIN: +4 dBu): 80dB or better

•MIC (INPUT GAIN: -70dBu: 55dB or better (equivalent input noise: -125 dBu)

Total harmonic distortion

0.1％ or less at 1 kHz

Headphones residual noise (PHONES level control at minimum)

-72 dBV or less (A-weighted)

Crosstalk:

-70 dB or less at 1kHz

Others

Phantom power:

P48 (phantom 48V) and T12 (A-B 12V) power supply circuit for each input channel.

*T12 power supply can be disabled or enabled using the status mode.

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