Mackie 1620 Appendix C: Technical Info, Onyx 1620 Specifications, ONYX, Crosstalk, Noise Floor, Equalization, Dynamic Range, Phantom Power, Input Impedance

1620

Appendix C: Technical Info

ONYX

Onyx 1620 SpecificationsFrequency Response

Mic Input to Main Output (Gain @ Unity) +0, –1 dB, 20 Hz to 50 kHz +0, –3 dB, <10 Hz to >100 kHz

Distortion (THD & IMD)

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)

Maximum Input Levels

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

Dynamic Range

>110 dB (Mic In to Main Out)

Noise Floor

(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 unity)

Common Mode Rejection Ratio (CMRR)

Mic In: >70 dB @ 1 kHz, Gain @ maximum

Crosstalk

Adjacent Inputs: < –105 dB @ 1 kHz

Mic Input to Main Output: < –87 dB @ 1 kHz

Input Gain Control Range

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

Phantom Power

+48 VDC

Equalization

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

Mixer Rated Output

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

Maximum Voltage Gain

Mic Input to:
Main Output:	80 dB
Tape Output:	80 dB
Aux Sends:	86 dB
Control Rm Output: 90 dB
Alt 3/4 Output:	64 dB
Phones Output:	90 dB
Inst Input to:
Main Output:	60 dB
Tape Output:	60 dB
Aux Sends:	66 dB
Control Rm Output: 70 dB
Alt 3/4 Output:	44 dB
Phones Output:	70 dB
Stereo Line Input to:
Main Output:	40 dB
Tape Output:	40 dB
Aux Sends:	46 dB
Control Rm Output: 50 dB
Alt 3/4 Output:	24 dB
Phones Output:	50 dB
Tape Input to:
Main Output:	26 dB
Tape Output:	26 dB
Control Rm Output: 16 dB
Phones Output:	16 dB
Aux Return to:
Main Output:	20 dB
Tape Output:	20 dB
Aux Send:	32 dB
Control Rm Output: 30 dB
Phones Output:	30 dB

Input Impedance

Mic Input:	2.4 kΩ, balanced
Inst Input:	1 MΩ
Mono Channel Line Input:	30 kΩ balanced;
	15 kΩ unbalanced
Stereo Channel Line Input:	20 kΩ balanced;
	10 kΩ unbalanced
Stereo Aux Returns:	20 kΩ balanced;
	10 kΩ unbalanced
Tape In:	20 kΩ, unbalanced

26 ONYX 1620