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All specifications are typical unless otherwise
noted.
0 dBV = 1 Volt
All specifications are referenced to nominal output
level (0 dBV) unless otherwise stated. All measure-
ments are wide band 20 Hz to 20 kHz unless other-
wise stated.
NOTE: All specifications measured at 1 V RMS
input and unbalanced output. All sliders at mid
position; all switches out unless otherwise noted.
Frequency Response:
±1 dB, 20 Hz to 20 kHz
Distortion:
.005%, 20 Hz to 20 kHz
Input Impedance:
Balanced 20 K ohms (equal impedances to
ground)
Output Impedance:
330 ohms
Maximum Input Level:
+18 dBV (8 VRMS)
Maximum Output Level:
+18 dBV (8 VRMS)
Nominal Input Level:
0 dBV (1 VRMS)
Nominal Output Level:
0 dBV (1 VRMS)
Input Headroom:
Nominal 18 dB
Output Headroom:
18 dB
Output Noise:
EQ in bypass: -101 dBV
EQ in filter: -95 dBV
Filter Frequencies:
20, 25, 32, 40, 50, 63, 80, 100, 125, 160,
200, 250, 315, 400, 500, 630, 800, 1 K,
1.25 K, 1.6 K, 2 K, 2.5 K, 3.15K, 4 K, 5 K,
6.3 K, 8 K, 10 K, 12.5 K, 16 K, and 20 kHz
Filter Q:
4.77
Maximum Boost and Cut Filter:
+12 dB,-18 dB
Maximum Boost and Cut Gain:
±15 dB
Low Cut Filer:
40 Hz
Dimensions and Weight:
3.5" H x 19"W x 9.75" D
9.2 lbs.
Q
™
431FX SPECIFICATIONS
Due to our efforts for constant improvements,
features and specifications listed herein are subject to change without notice.
TM
®