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ONYX 1640

ONYX 1640

Rear Panel

This is where all the connections are made to the

Onyx 1640 (except the headphones and the lamp).

One of the things that revolutionized the compact

mixer industry was the “convertible pod” found on the
original, classic CR-1604. Using an ordinary phillips
screwdriver, the mixer could be converted from desk-
top mode (as it comes from the factory) to rackmount
mode. Fear not. This feature is so popular that we have
kept it in the Onyx 1640. Refer to Appendix D for in-
structions on converting the I/O pod for rack mounting.

A third option allows you to rotate the pod so that the

jacks are on the same plane as all the knobs, buttons, and
faders. This is a lifesaver when you have to do frequent
repatching of the connectors. This, however, requires
the optional rotopod bracket, not supplied with the Onyx
1640. Contact your Mackie dealer for details.

47. MIC Input

This is a female XLR connector, which accepts a bal-

anced microphone input from almost any type of micro-
phone. The microphone preamps feature our new Onyx
design, with higher fi delity and headroom rivaling any
standalone mic preamp on the market today.

The XLR inputs are wired as follows:

Pin 1 = Shield or ground

Pin 2 = Positive (+ or hot)

Pin 3 = Negative (– or cold)

48. LINE Input (Channels 3-16)

This is a 1/4" TRS connector, which accepts a balanced or

unbalanced line-level input signal from almost any source.

When connecting a balanced signal to the LINE inputs,

wire them as follows:

Tip = Positive (+ or hot)

Ring = Negative (– or cold)

Sleeve = Shield or ground

When connecting an unbalanced signal, wire them as

follows:

Tip = Positive (+ or hot)

Sleeve = Shield or ground

49. HI-Z Instrument Input
(Channels 1-2)

This is a 1/4" connector, which accepts an unbalanced

instrument-level input signal from a high-impedance
instrument like a guitar.

50. CHANNEL INSERT

These 1/4" TRS jacks provide a send and return point

for channels 1-16. Use the CHANNEL INSERT jacks
to connect serial effects devices such as compressors,
equalizers, de-essers, or fi lters to each individual channel.

The INSERT points are after the GAIN and Low Cut

controls, but before the EQ and Fader controls. The
send (tip) is low-impedance, capable of driving any
device. The return (ring) is high-impedance and can be
driven by almost any device.

Special insert cables are available, specially designed

for this kind of insert jack. They are wired as follows:

“tip”

this plug connects to one of the
mixer’s Channel Insert jacks.

“ring”

tip

ring

sleeve

SEND to processor

RETURN from processor

(TRS plug)

Tip = Send (output to effects device)

Ring = Return ( input from effects device)

Sleeve = Common ground (connect shield to all

three

sleeves)

Besides being used for inserting external devices,

these jacks can also be used as channel direct outputs;
post-GAIN, post-LOW CUT, and pre-EQ. This is an unbal-
anced direct out, in contrast to the RECORDING OUTS
on the rear panel, which are balanced direct outputs,
post-GAIN, pre-LOW CUT.

TALKBACK

MIC

SUB OUT

C-R OUT

MAIN

INSERT

(TIP=SEND

RING=RETURN)

TAPE

INPUT

TAPE

OUTPUT

MAIN OUT

AUX SEND

AUX RETURN

MONO

(MONO)

DESIGNED BY MACKOIDS IN WOODINVILLE, WA , USA • MANUFACTURED IN CHINA • FABRIQUE EN CHINE • COPYRIGHT ©2004 • THE FOLLOWING ARE TRADEMARKS OR REGISTERED TRADEMARKS OF LOUD TECHNOLOGIES INC.: "MACKIE", "ONYX", AND THE "RUNNING MAN" FIGURE • US PATENT NUMBER 29/049,129

MAIN

OUTPUT

LEVEL

RIGHT

LEFT

MAIN OUTS

MIC

+4dB

INSERT

LINE

BAL
UN-

BAL