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14 Appendix
MX400 User’s Guide
Appendix
General specifications.
Frequency response
20 Hz~20 kHz +1, –2dB (ST L/R, GROUP @ 600 Ω AUX SEND @ 600 Ω)
Total harmonic distortion
Less than 0.1% (20 Hz~20 kHz @ 14dB*) (ST L/R, GROUP @ 600 Ω AUX SEND
@ 600 Ω)
Crosstalk (@1 kHz)
–70dB (between adjacent channels)
–70dB (between outputs)
Hum & Noise (Average, Rs=150 Ω)
(Measured with BPF 20 Hz~20 kHz)
–128dB* equivalent input noise (CH 1~24)
–96dB* residual noise (STEREO 1,2, GROUP 1~4, AUX SEND 1~5)
–87dB* (STEREO 1,2, GROUP 1~4) Measured with master faders at nominal
level and all assign switches off
–64dB* (SN ratio = 68dB) (STEREO 1,2, GROUP 1~4) Measured with master
fader and input module 1 at nominal level position
–78dB* (AUX SEND 1~5) Measured with AUX SEND master faders at nominal
level and AUX controls of all modules at minimum position
–64dB* (SN ratio = 68dB) (AUX SEND 1~5) Measured with AUX SEND faders
and the AUX control of one module at nominal level position
–82dB* (STEREO 2/MONITOR) Measured with the ST2/MONITOR master fad-
er and PFL and AFL switched off for all modules. Measured with MONI/ST2
switch in the MONI position.
–64dB* (SN ratio = 68dB) (STEREO 2/MONITOR) Measured with the
ST2/MONITOR master fader and the PFL switch on for one module, and the
MONI/ST2 switch in the MONI position
Maximum voltage gain
84dB INPUT A/B → STEREO OUT 1,2
84dB INPUT A/B → GROUP OUT 1~4
80dB INPUT A/B → AUX SEND 1,2
90dB INPUT A/B → AUX SEND 3~5
28dB TAPE IN → STEREO OUT 1,2
30dB ST INPUT 1~4 → STEREO OUT 1,2, GROUP OUT 1~4
30dB ST INPUT 1~4 → AUX SEND 1~4
10dB GROUP SUB IN → GROUP OUT
10dB ST SUB IN → STEREO OUT
22dB 2TR IN → STEREO 2/MONITOR
70dB TALKBACK → STEREO OUT
Input module EQ
Maximum variation +/–15dB
HIGH 12 kHz shelving type
MID 250 Hz~5 kHz peaking
LOW 80 Hz shelving type
* Turnover/roll-off frequency for shelving: 3dB before maximum variation
ST input module EQ
Maximum variation +/–15dB
HIGH 12 kHz shelving
LOW 80 Hz shelving
* Turnover/roll-off frequency: 3dB before maximum variation
Input module HPF
80 Hz 12dB/oct
Input module GAIN control
44dB variable –60dB~ –16dB
Meters (0 LED = +4dB* output level)
6 × 11 segment LED (–20, –15, –10, –7, –4, –2, 0, +2, +4, +6, PEAK), GROUP
1,2, GROUP 3,4 or ST2/MONITOR L,R, ST1 L,R
Input module, stereo input module indicators
PEAK Lights red when post EQ signal reaches 3dB before clipping
SIGNAL Lights green when post EQ signal reaches 10dB before nominal lev-
el
AUX SEND indicators
PEAK Lights red when output signal reaches 3dB before clipping
0 Lights yellow when output signal reaches +4dB
–20 Lights green when output signal reaches –16dB