Mackie 1640 Appendix C: Technical Info, Onyx 1640 Specifications, Crosstalk, Noise Floor, Equalization, Dynamic Range, Phantom Power, Owner’s Manual, Input Impedance, Low:

Appendix C: Technical Info

Owner

Onyx 1640 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: < 0.01%, 20 Hz to 20 kHz

SMPTE IMD: < 0.005% (7 kHz/60 Hz, 4:1)Dynamic Range>110 dB (Mic In to Main Out)Noise FloorSignal-to-Noise Ratio:–93 dBu (ref. +4 dBu, Mic In to Main Out, Channel and Main Mix levels at unity)

Equivalent Input Noise (E.I.N.), 20 Hz to 20 kHz Bandwidth, 150Ω source impedance

–129.5 dBu @ +60 dB gainMic 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: >60 dB @ 1 kHz, Gain @ maximumCrosstalkAdjacent Inputs: < –95 dB @ 1 kHzInput to Output: < –75 dB @ 1 kHzInput Gain Control RangeMic In: 0 dB to +60 dBLine In: –20 dB to + 40 dB, mono channelsPhantom Power+48 VDCEqualization

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

Mixer Rated Output

Main:	+4 dBu
Aux Send:	+4 dBu
Control Room:	+4 dBu
Sub:	+4 dBu
Maximum Rated Output:
	+21 dBu @ Main XLR and TRS outputs

Maximum Input Levels

Mic Input:	+21 dBu, Gain @ unity
Inst Input:	+21 dBu, Gain @ –20 dB
Line Input:	+30 dBu, Gain @ –20 dB
Tape Input:	+21 dBu
Aux Return:	+21 dBu

Maximum Voltage Gain

Mic Input to:
Main Output:	80 dB
Tape Output:	80 dB
Sub Output:	80 dB
Aux Sends:	86 dB
Control Rm Output: 90 dB
Phones Output:	90 dB
Inst Input to:
Main Output:	60 dB
Tape Output:	60 dB
Sub Output:	60 dB
Aux Sends:	66 dB
Control Rm Output: 70 dB
Phones Output:	70 dB
Tape Input to:
Main Output:	20 dB
Tape Output:	20 dB
Control Rm Output: 20 dB
Phones Output:	20 dB
Aux Return to:
Main Output:	20 dB
Tape Output:	20 dB
Sub Output:	20 dB
Aux Send:	22 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 Aux Returns:	20 kΩ balanced;
	10 kΩ unbalanced
Tape In:	20 kΩ, unbalanced

Manual s’

Owner’s Manual 29