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Appendix C: Technical Info
Onyx 1620 Specifi cations
Mic Input to Main Output (Gain @ Unity)
+0, –1 dB, 20 Hz to 50 kHz
+0, –3 dB, <10 Hz to >100 kHz
Mic Input to Main Output (@ +4 dBu)
THD: < 0.004%, 20 Hz to 20 kHz
SMPTE IMD: < 0.005% (7 kHz/60 Hz, 4:1)
>110 dB (Mic In to Main Out)
(20 Hz to 20 kHz Bandwidth, 150Ω source impedance)
Equivalent Input Noise (E.I.N.)
–129.5 dBu @ +60 dB gain
Mic Output Noise:
Recording Output: –100 dBu (minimum gain)
Residual Output Noise:
Main Out: –102 dBu (Channel and Main Mix levels off)
Main Out: –88 dBu (Channel and Main Mix levels at
Mic In:
>70 dB @ 1 kHz, Gain @ maximum
Adjacent Inputs:
< –105 dB @ 1 kHz
Mic Input to Main Output:
< –87 dB @ 1 kHz
Mic In:
0 dB to +60 dB
Line In: –20 dB to + 40 dB, mono channels
Line In: –20 dB to +20 dB, stereo channels
+48 VDC
Mono Channel EQ:
High:
±15 dB @ 12 kHz
High Mid: ±15 dB, sweepable from 400 Hz to 8 kHz
Low Mid: ±15 dB, sweepable from 100 Hz to 2 kHz
Low:
±15 dB @ 80 Hz
Stereo Channel EQ:
High:
±15 dB @ 12 kHz
Mid:
±15 dB @ 2.5 kHz
Low:
±15 dB @ 80 Hz
Main:
+4 dBu
Aux Send:
+4 dBu
Control Room:
+4 dBu
Alt 3/4:
+4 dBu
Maximum Rated Output:
+27 dBu @ Main XLR and TRS outputs
Mic Input:
+21 dBu, Gain @ unity
Inst Input:
+21 dBu, Gain @ –20 dB
Mono Channel Line Input:
+30 dBu, Gain @ –20 dB
Stereo Channel Line Input:
+21 dBu, Gain @ –20 dB
Tape Input:
+15 dBu
Aux Return:
+21 dBu
Mic Input to:
Main Output:
Tape Output:
Aux Sends:
Control Rm Output: 90 dB
Alt 3/4 Output:
Phones Output:
Inst Input to:
Main Output:
Tape Output:
Aux Sends:
Control Rm Output: 70 dB
Alt 3/4 Output:
unity)
Phones Output:
Stereo Line Input to:
Main Output:
Tape Output:
Aux Sends:
Control Rm Output: 50 dB
Alt 3/4 Output:
Phones Output:
Tape Input to:
Main Output:
Tape Output:
Control Rm Output: 16 dB
Phones Output:
Aux Return to:
Main Output:
Tape Output:
Aux Send:
Control Rm Output: 30 dB
Phones Output:
Mic Input:
Inst Input:
Mono Channel Line Input:
Stereo Channel Line Input: 20 kΩ balanced;
Stereo Aux Returns:
Tape In:
80 dB
80 dB
86 dB
64 dB
90 dB
60 dB
60 dB
66 dB
44 dB
70 dB
40 dB
40 dB
46 dB
24 dB
50 dB
26 dB
26 dB
16 dB
20 dB
20 dB
32 dB
30 dB
2.4 kΩ, balanced
1 MΩ
30 kΩ balanced;
15 kΩ unbalanced
10 kΩ unbalanced
20 kΩ balanced;
10 kΩ unbalanced
20 kΩ, unbalanced
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