Specifications - Fostex FM-4 Owner's Manual

Inputs/Outputs
* 0dBu = 0 . 7 75Vrms
<Analog Inputs>
[INPUT] 1 through [INPUT] 4
• 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: 3 .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/1, R/2)
• Connector: XLR-3-32 type (transformer balanced)
• Applicable load impedance: 600 Ω or more
• Nominal output level: +4, 0, -10 or -60 dBu (switchable)
• Maximum output level: +24, +20, +10 or -40 dBu
(switchable)
[SUB OUT] (L/3, R/4)
• Connector: XLR-3-32 type (electronically balanced)
• Applicable load impedance: 10 kΩ or more
• Nominal output level: +4, 0, -10 or -60 dBu (switchable)
• Maximum output level: +24, +20, +10 or -40 dBu (switchable)
[TAPE OUT]
• Connector: 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] (1, 2)
• Connector: 3 .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)

Specifications

[PHONES]
• Connectors:
• Applicable load impedance: 8 Ω or more
• Maximum output power:
<Others>
[DC IN]
• Connector: XLR-4-32 type (male)
• Input voltage: DC 10 V to DC 24 V
[DC OUT]
• Connector: Hirose 4 pin (female)
• Output voltage: DC 7 .2 V - 24 V (Max . 0 .5 A)
Frequency response
• LINE IN - MAIN OUT:
• MIC IN - MAIN OUT:
• HEADPHONES (32 Ω load, 25 mW output power):
S/N ratio (A-weighted)
• LINE (INPUT GAIN: +4 dBu): 80 dB or better
• MIC (INPUT GAIN: -70 dBu: 55 dB or better
Total harmonic distortion
Headphones residual noise
-72 dBV or less (A-weighted)
Crosstalk:

1/4" stereo phone jack and 3 .5 mm stereo
mini-phone jack
50 mW (at 32 Ω load, THD: 0 .1 % or less)
* Applicable plug: Hirose HR10A-7P-4P
Performance
20 Hz to 20 kHz +/- 1 dB (reference level)
40 Hz to 20 kHz +/- 1 dB (reference level)
20 Hz to 20 kHz +/- 3 dB
(equivalent input noise: -125 dBu)
0 .1% or less at 1 kHz
(PHONES level control at minimum)
-70 dB or less at 1kHz