MACKIE DX8 User Manual

DX8 Digital Audio Mixer/
Signal Processor

Instruction Manual

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THE FOLLOWING ARE TRADEMARKS OR REGISTERED

TRADEMARKS OF MACKIE DESIGNS INC "MACKIE",

"MACKIE INDUSTRIAL", AND THE "RUNNING MAN" FIGURE

CONCEIVED, DESIGNED, AND MANUFACTURED

BY MACKIE DESIGNS INC WOODINVILLE • WA • USA

MADE IN USA • FABRIQUE AU USA • COPYRIGHT ©1999

100–240V , 50/60Hz, 1A MAX

LISTED COMMERCIAL

AUDIO EQUIPMENT

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9Z39

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DX8 DIGITAL MIXER

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CAUTION AVIS

RISK OF ELECTRIC SHOCK

RISQUE DE CHOC ELECTRIQUE

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK

NO USER-SERVICEABLE PARTS INSIDE

REFER SERVICING TO QUALIFIED PERSONNEL

ATTENTION: POUR EVITER LES RISQUES DE CHOC

ELECTRIQUE, NE PAS ENLEVER LE COUVERCLE. AUCUN

ENTRETIEN DE PIECES INTERIEURES PAR L'USAGER. CONFIER

L'ENTRETIEN AU PERSONNEL QUALIFIE.

AVIS: POUR EVITER LES RISQUES D'INCENDIE OU

D'ELECTROCUTION, N'EXPOSEZ PAS CET ARTICLE

The lightning flash with arrowhead symbol within an equilateral
triangle is intended to alert the user to the presence of uninsulated
"dangerous voltage" within the product's enclosure, that may be
of sufficient magnitude to constitute a risk of electric shock to persons.

Le symbole éclair avec point de flèche à l'intérieur d'un triangle
équilatéral est utilisé pour alerter l'utilisateur de la présence à
l'intérieur du coffret de "voltage dangereux" non isolé d'ampleur
suffisante pour constituer un risque d'éléctrocution.

The exclamation point within an equilateral triangle is intended to
alert the user of the presence of important operating and maintenance
(servicing) instructions in the literature accompanying the appliance.

Le point d'exclamation à l'intérieur d'un triangle équilatéral est
employé pour alerter les utilisateurs de la présence d'instructions
importantes pour le fonctionnement et l'entretien (service) dans le
livret d'instruction accompagnant l'appareil.

DO NOT OPEN

NE PAS OUVRIR

DO NOT REMOVE COVER (OR BACK)

A LA PLUIE OU A L'HUMIDITE

SAFETY INSTRUCTIONS

1. Read Instructions — Read all the safety and operation instructions before
operating the DX8.

2. Retain Instructions — The safety and operating instructions should be kept for
future reference.

3. HEED ALL WARNINGS — Follow all warnings on the DX8 and in these operating
instructions.

4. FOLLOW ALL INSTRUCTIONS — Follow all operating and other instructions.

5. Water and Moisture — Do not use the DX8 near water – for example, near a

bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, near a swimming
pool, etc.

6. Ventilation — This DX8 should be situated so that its location or position
does not interfere with its proper ventilation. For example, it should not be
situated on a bed, sofa, rug, or similar surface that may block any ventilation
openings, or placed in a built-in installation such as a bookcase or cabinet that
may impede the flow of air through ventilation openings.

7. Heat — Locate the DX8 away from heat sources such as radiators, or other devices
which produce heat.

8. Power Sources — Connect the DX8 to a power supply only of the type described in
these operation instructions or as marked on the rear panel. If using an external DC
power supply or battery pack, be sure the voltage corresponds to the range indicated on
the rear panel, and that it is connected with the correct polarity.

9. Power Cord Protection — Route power supply cords so that they are not likely to be
walked upon or pinched by items placed upon or against them, paying particular attention
to cords at plugs, convenience receptacles, and the point where they exit the DX8.

10. Object and Liquid Entry — Do not drop objects into or spill liquids into the inside
of the DX8.

11. Damage Requiring Service — The DX8 should be serviced only by qualified service
personnel when:

A. The power-supply cord or the plug has been damaged; or
B. Objects have fallen, or liquid has spilled into the DX8; or
C. The DX8 has been exposed to rain; or
D. The DX8 does not appear to operate normally or exhibits a marked

change in performance; or

E. The DX8 has been dropped, or its chassis damaged.

12. Servicing — The user should not attempt to service the DX8 beyond those means

described in this operating manual. All other servicing should be referred to the Mackie
Service Department.

13. To prevent electric shock, do not use this polarized plug with an extension cord,
receptacle or other outlet unless the blades can be fully inserted to prevent blade
exposure.

Pour préevenir les chocs électriques ne pas utiliser cette fiche polariseé avec un
prolongateur, un prise de courant ou une autre sortie de courant, sauf si les lames
peuvent être insérées à fond sans laisser aucune pariie à découvert.

14. Grounding or Polarization — Precautions should be taken so that the grounding or
polarization means of the DX8 is not defeated.

15. This apparatus does not exceed the Class A/Class B (whichever is applicable)
limits for radio noise emissions from digital apparatus as set out in the radio
interference regulations of the Canadian Department of Communications.

ATTENTION —Le présent appareil numérique n’émet pas de bruits radioélectriques
dépassant las limites applicables aux appareils numériques de class A/de class B (selon
le cas) prescrites dans le règlement sur le brouillage radioélectrique édicté par les
ministere des communications du Canada.

WARNING — To reduce the risk of fire or electric

shock, do not expose this appliance to rain or moisture.

TABLE OF CONTENTS

1. SAFETY INSTRUCTIONS ....................................................... 2

2. INTRODUCTION ...................................................................... 3

KEY FEATURES................................................................... 3

FRONT PANEL FEATURES ................................................. 4

REAR PANEL FEATURES ................................................... 5

SIGNAL-FLOW DIAGRAM ................................................. 6

3. INSTALLATION ....................................................................... 7

APPLICATION DIAGRAMS................................................. 7

CONNECTIONS ................................................................ 12

AC POWER CONSIDERATIONS....................................... 13

4. OPERATION........................................................................... 14

QUICK START ................................................................... 14

USING THE DIGITAL SIGNAL PROCESSORS ................ 15

USING THE BUS A and B INPUTS .................................. 15

DX8 – 2

USING THE RECORD OUTPUT ....................................... 16

OUTPUTS A and B ........................................................... 16

CAUTION — Internal lithium battery.
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.

USING THE REMOTE BUS CONNECTION ..................... 16

USING THE EXPANSION LOGIC I/O ............................... 16

FRONT PANEL LOCK........................................................ 17

UPGRADING THE SOFTWARE ........................................ 17

5. DX8-PC SOFTWARE ............................................................. 18

INSTALLING THE SOFTWARE ......................................... 18

CONNECTING A PC .......................................................... 18

OVERVIEW ........................................................................ 18

MENUS ............................................................................. 20

BUTTONS AND BOXES ................................................... 21

6. SPECIFICATIONS .................................................................. 30

BLOCK DIAGRAM ............................................................. 30

DX8 SPECIFICATIONS...................................................... 31

7. SERVICE INFORMATION ...................................................... 33

APPENDIX A: Logic Input Functions ............................................ 34

APPENDIX B: Logic Output Functions ......................................... 34

APPENDIX C: Selection Remote Predefined Functions ............. 35

APPENDIX D: Level Remote Predefined Functions .................... 34

2. INTRODUCTION

The DX8 is a DSP-based digital audio mixer and
signal processor designed for use in a variety of
installations such as churches, courtrooms,
convention centers, and hotels. It provides eight
universal inputs and two balanced outputs
allowing true 8x2 mixing for stereo or dual-zone
applications. In its base configuration the DX8
includes powerful signal processing software to
complement the 8x2 mixing structure. Optional
software and hardware is available to further
expand the DX8’s capabilities, allowing it to meet
the needs of more sophisticated applications.

Each of the eight input channels is terminated
to two Phoenix-type detachable connectors, each
optimized to accept either microphone or line­level signals. Microphone preamplifiers utilize
Mackie’s proprietary XDR™ technology to offer
studio-class audio performance. Phantom power
of 48V DC is switchable individually on each input.
Two auxiliary line-level inputs with trim are provided,
allowing analog signals to be mixed with the A
and B master mixes. Master outputs deliver
balanced line-level signals to detachable Phoenix­type connectors as well as buffered unbalanced
signals to RCA connectors intended for recording.

The DX8 offers an intuitive front panel user
interface, consisting of dual-function LED bar
graph meters for each input and output. Input
meters indicate the presence of signal before
signal processing (pre-fader), while output meters
indicate actual level at the output (post-fader).
Levels are set by means of UP/DOWN pushbut­tons dedicated to each input and output. A MODE
button is used to select between Mix A and B,
allowing adjustment of levels to both mix outputs
from the same set of input controls. A third
function of the MODE button allows the user to
LOCK the front panel controls until a security
unlock code is entered.

The DX8 offers flexible interface options
through dedicated inputs and outputs for control
and programming purposes. Two independent
RS232 connectors are provided, one on the front
panel and one on the rear, for connection to a
computer, control system, or compatible PDA.
A multi-pin (DB25F) connector on the rear panel
allows interface between the 10 Logic Inputs and
10 Logic Outputs to switches, LEDs and other
devices, enabling hardware control and indication
from custom control panels. All logic inputs and
outputs are fully programmable in software. A
proprietary remote control bus allows connection

Part No. 910-138-30 Rev. B 01/01
© 2001 All Rights Reserved. Mackie Industrial. Printed in U.S.A.

of the optional DX8 wired remotes over a variety of
three-conductor cable. Remotes are available in
Volume Control (DX-RVC) and 4-Switch (DX-SW4)
versions and may be combined in any configuration.

The DX8 is supplied with PC software that
allows access to all of the system’s settings and
configurations. The software offers Stereo and
Mono mixer views, as well as access to the two
1/3-octave equalizers, two 5-band parametric
equalizers and two compressors dedicated to the
two master outputs. In addition, it allows configu­ration and recall of up to 16 Presets, 8 input Priority
Levels, 8 Mute Groups and 8 Control Groups.
Force ON and OFF functions are provided, with a
selection of Relative or Absolute changes, which
can be used with the Priority settings to create
sophisticated audio management systems. All
settings and text labels are retained in the DX8 as
well as stored to the computer’s local drive,
simplifying future service calls and support.

The DX8 is UL and CE approved and designed
for continuous use in professional fixed installation
systems. An internal auto-ranging power supply
allows connection to mains voltages from 90-240V AC
at 50/60 Hz without requiring jumper or switch
setting changes. A 24V DC input is provided for
applications where backup battery power is
required. Switchover to backup power is automatic
and silent.

KEY FEATURES

• 32-bit DSP and 24-bit Analog/Digital Conversion

• 8 balanced XDR™ Mic/Line inputs with trim

• 2 balanced Line inputs direct to mix bus

• 2 Independent Mix Buses and balanced Outputs

• 2 unbalanced Record Outputs

• 8 unbalanced Direct Channel Outputs

• Individual Level/Peak (PPM) metering on each Input and Output

• 2-band sweepable shelving EQ on each Input and Output

• 31-band Graphic EQ on each Output

• 5-band Parametric EQ on each Output

• One fully variable Compressor on each Output

• 10 Programmable Logic Inputs

• 10 Programmable Logic Outputs

• 2 independent RS-232 interface ports

• 48V DC Phantom Power switch per input

• 24V DC Backup Power input

• Hardware Expansion Port accepts optional modules

• PC Software application included

DX8 – 3

FRONT PANEL FEATURES

INPUT UP/DOWN BUTTONS

Use these buttons to adjust the mix level for each
input channel.

INPUT LED DISPLAY

This indicates the signal level after the mic preamp
stage, just after the A/D converter, but prior to any
digital signal processing. When any input UP/
DOWN button is pressed, all the meters (except
EQ) switch from level metering to level setting
indication. After five seconds, the meters switch
back to normal peak program metering (PPM).

When the 10 and 7 LEDs are both lit, the gain is set
to unity (0 dB).

EQ LO/HI UP/DOWN BUTTONS

Use these buttons to adjust the gain of the 2-band
shelving EQ on the outputs. The range is ± 15 dB.

EQ LED DISPLAY

When an EQ UP/DOWN button is pressed, the EQ
meter indicates the amount of boost or cut of the
LO and HI frequencies in decibels (± 15 dB).

When both "0" LEDs are lit, the gain is set to unity
(flat response).

Note: The EQ meters do not indicate signal level.

MASTER A/B UP/DOWN BUTTONS

These buttons adjust the output level for each
output bus.

MASTER OUTPUT LED DISPLAY

This indicates the signal level after the digital signal
processing and
the D/A converter. When any

MASTER

gain stage, just prior to

MASTER

UP/DOWN
button is pressed, all the meters (except EQ) switch
from level metering to level setting indication. After
five seconds, the meters switch back to normal
peak program metering (PPM).

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1 2 3 4 5 6 7 8 HILO EQ A MASTE

THE FOLLOWING ARE TRADEMARKS OR REGISTERED

TRADEMARKS OF MACKIE DESIGNS INC "MACKIE",

"MACKIE INDUSTRIAL", AND THE "RUNNING MAN" FIGURE

CONCEIVED, DESIGNED, AND MANUFACTURED

BY MACKIE DESIGNS INC WOODINVILLE • WA • USA

MADE IN USA • FABRIQUE AU USA • COPYRIGHT ©1999

9Z39

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+

100–240V , 50/60Hz, 1A MAX

LISTED COMMERCIAL

AUDIO EQUIPMENT

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DX8 – 4

MODE

REAR PANEL FEATURES

This switch changes the front panel operation
between Bus A and Bus B operation. In addition,
the

LOCK

position disables the front panel controls
to prevent unauthorized changes to the settings. A
security code must be entered to enable the front
panel controls when the DX8 is locked. See page 17
for more information on locking and unlocking the DX8.

COMM PORT

This is an RS-232 port on a 9-pin D-Sub connector,
which connects to a personal computer or other
compatible control system for external control of
the DX8 settings. A second

COMM

port on the rear
panel duplicates this function, for permanent
connection to an installed controller.

POWER

Use the

POWER

switch to turn the DX8 on and off.

INPUTS 1-8

Each of the eight analog inputs has separate
balanced mic and line input connectors that use
Mackie’s acclaimed XDR mic preamps. These are 3-
pin Phoenix-type connectors. Use either the

LINE

input, but only one can be used per channel.

MIC

or

TRIM

This rotary analog control is used to trim the gain of
the input signal for optimum signal-to-noise ratio in
the preamp stage. For mic-level signals, it provides
from 0 to +60 dB of gain. For line-level signals, it
provides from –30 dB to +30 dB of gain, with unity
(0 dB) at the center position, and accepts a
maximum input signal of +18 dBu before clipping
(at unity gain).

PHANTOM POWER

These switches apply phantom power (+48V DC)
to pins 2 and 3 of the selected mic input
connectors. Switch the

PHANTOM POWER

switch
for an individual channel to the UP position when
using a condenser microphone.

URING DATE

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DX8 DIGITAL MIXER

A B LOCK

MODE

INPUTS

12 1 +5V

OUTPUTS

11G1

LOGIC I/O

OUTPUTS

A

RECORD

A

B

COMM PORT

+

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G

REMOTE BUS

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POWER

COMM PORT

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B

BUS A/B INPUTS

These analog inputs accept balanced line­level signals and route the signal to the
internal buses. These inputs may serve as
additional zone inputs for program devices,
or to connect the

BUS A

and

BUS B

outputs from another DX8. There is no
DSP processing on these inputs.

BUS A and B TRIM

These rotary analog controls are used to
trim the gain of the inputs to the buses.
This trim control provides from –20 dB to
+20 dB of gain, with unity (0 dB) at the
center-detent position.

DIRECT OUTPUTS

This 15-pin D-Sub connector supplies an
analog, unbalanced line-level signal from
each of the eight program inputs, post­preamp and pre-processing. Use these
outputs to connect to another mixing
console for additional zone coverage, to
a telephone system for music-on-hold, or
to a multi-track recorder. See page 12 for
the Direct Output pinouts.

+

–

DX8 – 5

RECORD Out

These RCA connectors supply unbalanced line-level
signals from the

BUS A

and

BUS B

outputs. Use
these outputs to connect to the inputs of a
recorder, or as additional line-level outputs to
connect to an external power amplifier. The signals
are the same as the main outputs.

OUTPUTS A/B

Several remote controls can be connected to each
other in a daisy-chain fashion to extend the remote
control functionality of the DX8.

COMM PORT

This is identical to the

COMM PORT

on the front
panel. Use this to connect to an RS-232 serial port
on a personal computer or third-party controller (i.e.,
show controller) for external control of the DX8.

These 3-pin Phoenix-type connectors supply a
balanced line-level signal from

BUS A

and

BUS B

.

LOGIC I/O

This 25-pin D-Sub connector provides 10 logic
control inputs and 10 logic control outputs (open­collector). These inputs can be used to control a
wide variety of DX8 functions via external
switching. The outputs can be used to provide
status levels for external indicators for a number of
internal settings and conditions, as well as control
switching to external devices. The function of each
logic input and output can be programmed via
software to suit individual applications. See page
13 for the Logic I/O pinouts.

REMOTE BUS

This 3-pin Phoenix-type connector can be used to
attach optional remote controls to the DX8.

23456781

THE FOLLOWING ARE TRADEMARKS OR REGISTERED

TRADEMARKS OF MACKIE DESIGNS INC "MACKIE",

"MACKIE INDUSTRIAL", AND THE "RUNNING MAN" FIGURE

CONCEIVED, DESIGNED, AND MANUFACTURED

BY MACKIE DESIGNS INC WOODINVILLE • WA • USA

MADE IN USA • FABRIQUE AU USA • COPYRIGHT ©1999

100–240V , 50/60Hz, 1A MAX

LISTED COMMERCIAL

AUDIO EQUIPMENT

R

9Z39

DIRECT OUTPUTS

U

U

+20-20

+20-20

TRIM

TRIM

BUS A

BUS B

MIC

+

G

POWER

–

INPUT

LINE

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28V DC,

22

+

–

G

3A MAX

–
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DX8 DIGITAL MIXER

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LINE

EXPANSION SLOT

The optional eNet16™ network card (DX-IF16) can
be installed here. It provides 8 additional indepen­dent output mixes, and can be used to interconnect
additional DX8s into a networked system.

24V DC POWER

The DX8 can be powered using a 24V DC power
supply. This can serve as the primary power supply
for the DX8, or as a backup supply in case of an AC
power failure. The DX8 seamlessly switches to the
backup supply if there’s a power loss. When both
AC power and 24V DC power are connected, the
AC power is used and no current is drawn from
the DC supply.

IEC AC Socket

Connect the supplied AC linecord to the IEC AC
socket.

MANUFACTURING DATE

SERIAL NUMBER

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INPUTS

OUTPUTS

LOGIC I/O

A

RECORD

+

–

G

REMOTE BUS

OUTPUTS

+

–

G

A

B

COMM PORT

G

B

+

–

SIGNAL-FLOW DIAGRAM

Analog

Input
CH 1

CH 1
Direct

Output

DX8 – 6

DX8 Signal-Flow Diagram

Analog-to-

Digital

Converter

Channel

Lo-Shelf

EQ

Lo-Shelf

EQ

Meter

Lo-Shelf

EQ

Hi-Shelf

EQ

Hi-Shelf

EQ

Hi-Shelf

EQ

Mute

Mute

Mute

Master
Faders

A & B

Channel

Faders to

Channels

2-8

A & B

Compressor

Compressor

Bus A

Bus B

Output
Meters

31-Band

Graphic EQ

31-Band

Graphic EQ

Digital-to-

Analog

Converter

Bus B
Inputs
Bus A

5-Band

Parametric

EQ

5-Band

Parametric

EQ

A & B

Outputs

Record

Outputs

B

REMOTE BUS

TRIM

BUS A

U

+20-20

A

TRIM

1

RECORD

A

B

OUTPUTS

LOGIC I/O

TRIM

BUS B

U

+20-20

TRIM

2

TRIM

3

TRIM

4

TRIM

5

TRIM

6

TRIM

7

TRIM

8

M

I

C

G

A

I

N

060

–

+

SERIAL NUMBER

MANUFACTURING DATE

COMM PORT

DIRECT OUTPUTS

12345678

POWER

INPUT

22

-

28V DC,

3A MAX

23456781

–

+

G

G

+

–

MIC

LINE

LINELINELINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

PHANTOM POWER

48V DC

12 1 +5V

11G1

INPUTS

OUTPUTS

DX8 DIGITAL MIXER

G

+

–

G

+

–

G

+

–

100

–

240V , 50/60Hz, 1A MAX

THE FOLLOWING ARE TRADEMARKS OR REGISTERED

TRADEMARKS OF MACKIE DESIGNS INC "MACKIE",

"MACKIE INDUSTRIAL", AND THE "RUNNING MAN" FIGURE

CONCEIVED, DESIGNED, AND MANUFACTURED

BY MACKIE DESIGNS INC WOODINVILLE • WA • USA

MADE IN USA • FABRIQUE AU USA • COPYRIGHT ©1999

LISTED COMMERCIAL

AUDIO EQUIPMENT

9Z39

R

ON

CD Player

Cassette or DAT Recorder

Microphone

Stereo

Power Amplifier

Left Right

Jukebox

Remote Controls

Laptop with

DX8-PC Application

0

– 3

– 6

– 8

–10

– 5

– 10

– 15

– 20

– 25

– 30

– 40

3. INSTALLATION

APPLICATION DIAGRAMS

A: Typical Stereo Application

DX8 – 7

B

REMOTE BUS

TRIM

BUS A

U

+20-20

A

TRIM

1

RECORD

A

B

OUTPUTS

LOGIC I/O

TRIM

BUS B

U

+20-20

TRIM

2

TRIM

3

TRIM

4

TRIM

5

TRIM

6

TRIM

7

TRIM

8

M

I

C

G

A

I

N

060

–

+

SERIAL NUMBER

MANUFACTURING DATE

COMM PORT

DIRECT OUTPUTS

12345678

POWER

INPUT

22

-

28V DC,

3A MAX

23456781

–

+

G

G

+

–

MIC

LINE

LINELINELINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

PHANTOM POWER

48V DC

12 1 +5V

11G1

INPUTS

OUTPUTS

DX8 DIGITAL MIXER

G

+

–

G

+

–

G

+

–

100

–

240V , 50/60Hz, 1A MAX

THE FOLLOWING ARE TRADEMARKS OR REGISTERED

TRADEMARKS OF MACKIE DESIGNS INC "MACKIE",

"MACKIE INDUSTRIAL", AND THE "RUNNING MAN" FIGURE

CONCEIVED, DESIGNED, AND MANUFACTURED

BY MACKIE DESIGNS INC WOODINVILLE • WA • USA

MADE IN USA • FABRIQUE AU USA • COPYRIGHT ©1999

LISTED COMMERCIAL

AUDIO EQUIPMENT

9Z39

R

ON

CD Player

Cassette or DAT Recorder

Paging Mic

24VDC

Power Supply

Digital Satellite Service

Zone B

Remote Controls

Zone A

Remote Controls

70V Distribution

Power Amplifier

Stereo

Power Amplifier

(Mono Mode)

Left Right

Zone A (Restaurant) Zone B (Bar)

–+

0

– 3

– 6

– 8

–10

– 5

– 10

– 15

– 20

– 25

– 30

– 40

Priority Mic

Control Switch

to Logic Input

Priority Enable

0

– 3

– 6

– 8

–10

– 5

– 10

– 15

– 20

– 25

– 30

– 40

DX8 – 8

B: Typical Two-Zone Application

Drum Mics

Voca ls

Digital Multitrack Recorder

Optional Live Recording

THE FOLLOWING ARE TRADEMARKS OR REGISTERED

TRADEMARKS OF MACKIE DESIGNS INC "MACKIE",

"MACKIE INDUSTRIAL", AND THE "RUNNING MAN" FIGURE

CONCEIVED, DESIGNED, AND MANUFACTURED

BY MACKIE DESIGNS INC WOODINVILLE • WA • USA

MADE IN USA • FABRIQUE AU USA • COPYRIGHT ©1999

100–240V , 50/60Hz, 1A MAX

Secondary

Remote Controls

–10
– 8
– 6
– 3

0

– 5
– 10
– 15
– 20
– 25
– 30
– 40

R

Voca ls

LISTED COMMERCIAL

AUDIO EQUIPMENT

9Z39

–

+

Voca ls

POWER

INPUT

-

28V DC,

22

3A MAX

Wireless Microphone

Receiver for
Lead Vocalist

23456781

DIRECT OUTPUTS

U

U

+20-20

+20-20

TRIM

TRIM

BUS A

BUS B

MIC

+

G

–

LINE

+

–

G

DX8 DIGITAL MIXER

U

G

A

C

I

N

I

M

060

-

30dB+30dB

TRIM

1

MIC

LINELINELINE

U

U

G

G

A

A

C

C

I

I

N

N

I

I

M

M

060

060

-

-

30dB+30dB

30dB+30dB

TRIM2TRIM3TRIM4TRIM5TRIM6TRIM7TRIM

MIC

MIC

LINE

LINE

C

I

M

060

-

30dB+30dB

MIC

LINE

U

U

G

G

A

A

C

I

I

N

N

I

M

060

-

30dB+30dB

MIC

LINE

Lecturn

Choir

SERIAL NUMBER

C

I

M

060

-

30dB+30dB

MIC

LINE

U

G

A

I

N

MANUFACTURING DATE

U

G

A

C

I

N

I

M

060

-

30dB+30dB

MIC

LINE

C

I

M

060

-

30dB+30dB

MIC

LINE

Laptop with

DX8-PC Application

U

G

A

I

N

8

12 1 +5V

11G1

PHANTOM POWER

48V DC

ON

12345678

INPUTS

OUTPUTS

LOGIC I/O

A

RECORD

CD Player

+

–

G

REMOTE BUS

COMM PORT

OUTPUTS

+

+

–

G

B

Fellowship

Hall

–

Remote Controls

–10
– 8
– 6
– 3

0

– 5
– 10
– 15
– 20
– 25
– 30
– 40

G

A

B

THE FOLLOWING ARE TRADEMARKS OR REGISTERED

TRADEMARKS OF MACKIE DESIGNS INC "MACKIE",

"MACKIE INDUSTRIAL", AND THE "RUNNING MAN" FIGURE

CONCEIVED, DESIGNED, AND MANUFACTURED

BY MACKIE DESIGNS INC WOODINVILLE • WA • USA

MADE IN USA • FABRIQUE AU USA • COPYRIGHT ©1999

Primary

Pulpit

100–240V , 50/60Hz, 1A MAX

LISTED COMMERCIAL

AUDIO EQUIPMENT

R

23456781

DIRECT OUTPUTS

U

U

+20-20

+20-20

TRIM

TRIM

BUS A

BUS B

MIC

+

G

POWER

–

INPUT

LINE

-

28V DC,

22

+

–

G

3A MAX

–
+

9Z39

DX8 DIGITAL MIXER

U

G

A

C

I

N

I

M

060

-

30dB+30dB

TRIM

1

MIC

LINELINELINE

U

U

G

G

A

A

C

C

I

I

N

N

I

I

M

M

060

060

-

-

30dB+30dB

30dB+30dB

TRIM2TRIM3TRIM4TRIM5TRIM6TRIM7TRIM

MIC

MIC

LINE

LINE

C

I

M

060

-

30dB+30dB

MIC

LINE

U

U

G

G

A

A

C

I

I

N

N

I

M

060

-

30dB+30dB

MIC

LINE

SERIAL NUMBER

C

I

M

060

-

30dB+30dB

MIC

LINE

U

G

A

I

N

MANUFACTURING DATE

U

G

A

C

I

N

I

M

060

-

30dB+30dB

MIC

LINE

C

I

M

060

-

30dB+30dB

MIC

LINE

U

G

A

I

N

8

12 1 +5V

INPUTS

OUTPUTS

11G1

LOGIC I/O

PHANTOM POWER

48V DC

ON

12345678

Stereo Power Amplifiers

A

B

RECORD

in Mono Mode

REMOTE BUS

OUTPUTS

A

+

–

G

COMM PORT

+

+

–

G

–

G

B

Cassette Deck

Left Right

Sanctuary

Left Right

Fellowship Hall

C: Two DX8s in Church Application

DX8 – 9

B

REMOTE BUS

TRIM

BUS A

U

+20-20

A

TRIM

1

RECORD

A

B

OUTPUTS

LOGIC I/O

TRIM

BUS B

U

+20-20

TRIM

2

TRIM

3

TRIM

4

TRIM

5

TRIM

6

TRIM

7

TRIM

8

M

I

C

G

A

I

N

060

–

+

SERIAL NUMBER

MANUFACTURING DATE

COMM PORT

DIRECT OUTPUTS

12345678

POWER

INPUT

22

-

28V DC,

3A MAX

23456781

–

+

G

G

+

–

MIC

LINE

LINELINELINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

DX8 DIGITAL MIXER

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

M

I

C

G

A

I

N

060

-

30dB +30dB

U

PHANTOM POWER

48V DC

12 1 +5V

11G1

INPUTS

OUTPUTS

G

+

–

G

+

–

G

+

–

100

–

240V , 50/60Hz, 1A MAX

THE FOLLOWING ARE TRADEMARKS OR REGISTERED

TRADEMARKS OF MACKIE DESIGNS INC "MACKIE",

"MACKIE INDUSTRIAL", AND THE "RUNNING MAN" FIGURE

CONCEIVED, DESIGNED, AND MANUFACTURED

BY MACKIE DESIGNS INC WOODINVILLE • WA • USA

MADE IN USA • FABRIQUE AU USA • COPYRIGHT ©1999

LISTED COMMERCIAL

AUDIO EQUIPMENT

9Z39

R

ON

B

REMOTE BUS

TRIM

BUS A

U

+20-20

A

TRIM

1

RECORD

AB

OUTPUTS

LOGIC I/O

TRIM

BUS B

U

+20-20

TRIM

2

TRIM

3

TRIM

4

TRIM

5

TRIM

6

TRIM

7

TRIM

8

M

I

C

G

A

I

N

060

–

+

SERIAL NUMBER

MANUFACTURING DATE

COMM PORT

DIRECT OUTPUTS

12345678

POWER

INPUT
22

-

28V DC,

3A MAX

23456781

–

+

G

G

+

–

MIC

LINE

LINELINELINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

LINE

MIC

DX8 DIGITAL MIXER

-

30dB+30dB

U

M

I

C

G

A

I

N

060

-

30dB+30dB

U

M

I

C

G

A

I

N

060

-

30dB+30dB

U

M

I

C

G

A

I

N

060

-

30dB+30dB

U

M

I

C

G

A

I

N

060

-

30dB+30dB

U

M

I

C

G

A

I

N

060

-

30dB+30dB

U

M

I

C

G

A

I

N

060

-

30dB+30dB

U

M

I

C

G

A

I

N

060

-

30dB+30dB

U

PHANTOM POWER

48V DC

12 1 +5V

11G1

G

+

–

G

+

–

G

+

–

INPUTS

100

–

240V , 50/60Hz, 1A MAX

THE FOLLOWING ARE TRADEMARKS OR REGISTERED

TRADEMARKS OF MACKIE DESIGNS INC "MACKIE",

"MACKIE INDUSTRIAL", AND THE "RUNNING MAN" FIGURE

CONCEIVED, DESIGNED, AND MANUFACTURED

BY MACKIE DESIGNS INC WOODINVILLE • WA • USA
MADE IN USA • FABRIQUE AU USA • COPYRIGHT ©1999

LISTED COMMERCIAL

AUDIO EQUIPMENT

9Z39

R

Podium Mic

Zone B

Remote Controls

Zone A

Remote Controls

70V Distribution

Power Amplifier

70V Distribution

Power Amplifier

Zone B Microphones

Zone A

Zone B

Table Microphones

0

– 3

– 6

– 8

–10

– 5

– 10

– 15

– 20

– 25

– 30

– 40

Priority Mic

Control Switch

to Logic Input

Priority Enable

0

– 3

– 6

– 8

–10

– 5

– 10

– 15

– 20

– 25

– 30

– 40

DX8 – 10

D: Board Room Application with Two-Zones

Application Diagrams

A: Typical Stereo Application

This diagram depicts a simple setup, using the
DX8 in a stereo application. A microphone is
connected to the
purposes, and several program sources are connected
to the

LINE

B: Typical Two-Zone Application

This configuration demonstrates how the DX8
might be used in a restaurant/bar application. A
paging mic is connected to the
channel 1. Notice the priority enable switch near the
paging mic, which causes the other inputs to either
turn off or reduce their volume levels, depending on
how the Force-On/Off function is set up in the

Audio Input

Zone A uses a 70V distribution system for broad
coverage using multiple speakers throughout the
restaurant area.

Zone B uses a stereo power amplifier configured
for mono operation to power two or four speakers
in the bar area. Each zone has a pair of remote
controls, allowing access to predefined functions
such as level control and program source selection
in each zone.

A 24V DC power supply is connected to the

POWER INPUT

operation in case of an AC power failure.

C: Two DX8s In Church Application

This illustrates using two DX8s to meet the many
requirements in this church application. The primary
DX8 is used to connect the various microphones
located at the pulpit, lecturn, and choir loft. Two
additional microphones from the Fellowship Hall are
connected to
connected to
prerecorded music for soloists when required.

A pair of remote controls is located at the pulpit,
primarily for selecting presets for various events
such as Sunday morning service, Monday evening
Bible study, and Saturday afternoon weddings.
Another pair of remotes is located in the Fellowship
Hall to control the level for the microphones (assigned
to a Fader B Control Group) in the Fellowship Hall,
and to choose whether the Sanctuary mics are
heard in the Fellowship Hall and whether the
Fellowship Hall mics are heard in the Sanctuary.

MIC

input on channel 1 for paging

inputs on channels 3 through 8.

MIC

input on

window.

connector on the DX8, for backup

MIC

inputs 5 and 6. A CD player is

LINE

inputs 7 and 8 for playback of

A cassette deck is connected to the

output jacks for recording the service.

The

A OUTPUT is

amplifier configured for mono operation that drives
a pair of loudspeakers that cover the sanctuary.
The

B OUTPUT

power amplifier configured for mono operation
that provides power for a pair of speakers in the
Fellowship Hall.

The secondary DX8 is used to connect the
microphones and instruments for the band. The
and

B OUTPUTS

LINE

inputs on the primary DX8, where the signal is
mixed with the program sources connected to the
primary DX8.

A digital multitrack recorder is connected to the

DIRECT OUTPUTS

tracking the vocals and instruments for later
mixdown to 2-track.

A laptop is connected to the front panel

PORT

on the secondary DX8, using a standard 9-pin
RS-232 computer cable. This gives the band remote
control over the entire mix of the instruments and
vocals connected to the secondary DX8.

D: Board Room Application With Two-Zones

In this configuration, eight microphones are
connected to a DX8. The podium mic is connected
to channel 1, and has a priority enable switch near it
connected to a logic input for the moderator to use
to mute or duck the other microphones, if required.

Two zones are covered using 70V distribution.
Zone B can be partitioned off, and has a second
DX8 for selecting either the board room source
(connected to
microphones in Zone B (for a separate meeting
going on simultaneously).

Each zone has a pair of remote controls for
configuring the system as needed.

connected to a stereo power

is connected to an additional

are connected to the

on the secondary DX8 for

BUS B LINE

input), or the

RECORD

BUS A

COMM

and

A

B

DX8 – 11

Connections

Connecting Balanced Sources

Make use of high-quality three-conductor cable
for balanced connections, such as Star Quad by
Belden, Canare, Mogami, etc. The better the shield,
the better the audio signal is protected from
induced EMI and RFI.

Note: With screw-down connectors, it's best to
use stranded wire that is not tinned. Solder can
"flow" under the pressure of the screw-down
terminal and cause the connection to become
loose.

To connect a balanced mic or line-level signal:

Strip the wire back about 1/4" inch, insert the
wire as far as it will go into the appropriate hole in
the supplied Phoenix-type connector, and tighten
down the screw with a small slot-head screwdriver.
It is recommended that you use 20 or 22 gauge
wire with the Phoenix-type connectors. The
connectors are wired as follows:

Pin 1 = Ground (Shield)

Pin 2 = Hot (+)

Pin 3 = Cold (–)

123

Connecting Unbalanced Sources

It may be necessary to connect a 2-conductor

unbalanced input to a balanced input on the DX8.

To connect an unbalanced line-level signal:

Follow the instructions for connecting a balanced
line-level signal above, but wire the connector as
follows:

Pin 1 = Ground (Shield)

Pin 2 = Hot (+)

Pin 3 = Ground

123

Gnd +

Unbalanced Connection

Connecting the DIRECT OUTPUTS

This is a 15-pin D-Sub connector. The signals on
the

DIRECT OUTPUT

twisted pairs for the
the best rejection of external noise (EMI and RFI).
The

DIRECT OUTPUT

are unbalanced. Use shielded,

DIRECT OUTPUT

cable to ensure

connector is wired as follows:

Gnd + –

Balanced Connection (Line Input Shown)

Note: To connect to the

connector upside-down relative to the

MIC

inputs, turn the

LINE

input
connector. Double check the wiring with the wiring
graphics indicated on the rear panel.

DIRECT OUTPUTS

8
SIGNAL RETURN
SIGNAL RETURN
SIGNAL RETURN
SIGNAL RETURN
SIGNAL RETURN
SIGNAL RETURN
SIGNAL RETURN

15

9

INPUT 1 HOT (+)
INPUT 2 HOT (+)
INPUT 3 HOT (+)
INPUT 4 HOT (+)
INPUT 5 HOT (+)
INPUT 6 HOT (+)
INPUT 7 HOT (+)
INPUT 8 HOT (+)

1

DIRECT OUTPUTS Pinout Connection

Connecting the RECORD Outputs

These are RCA-type unbalanced connectors. Use
high-quality shielded cable with RCA-type plugs for
these connections.

Connecting the Bus A and B OUTPUTS

These are 3-pin Phoenix-type connectors that
provide a balanced line-level output signal from Bus
A and Bus B. Use high-quality, three-conductor
shielded cable for these connections.

DX8 – 12

Strip the wire back about 1/4" inch, insert the
wire as far as it will go into the appropriate hole in
the supplied Phoenix-type connector, and tighten
down the screw with a small slot-head screwdriver.
It is recommended that you use 20 or 22 gauge
wire with the Phoenix-type connectors. The

OUTPUT

connectors are wired as follows:
Pin 1 = Ground (Shield)
Pin 2 = Hot (+)
Pin 3 = Cold (–)

Connecting the LOGIC I/O

This is a 25-pin D-Sub connector. There are 10 logic

inputs and 10 logic outputs. They are all active-low
circuits. Use 22 gauge wire for these connections.

LOGIC I/O

13

GROUND

N/C
LOGIC OUT 10
LOGIC OUT 9
LOGIC OUT 8
LOGIC OUT 7
LOGIC OUT 6
LOGIC OUT 5
LOGIC OUT 4
LOGIC OUT 3
LOGIC OUT 2
LOGIC OUT 1

25

14

LOGIC I/O Pinout Connection

The

logic inputs

are active-low with internal pull­up resistors connected to +5V DC. Use a normally
open switch connected between the logic input and
ground (pin 25). When the switch is closed, the
logic input is active. Depending on the function
assigned to the logic input, a toggle switch or a
momentary switch may be used.

LOGIC INPUT

13

25

GROUND

14

N/C
N/C
LOGIC IN 10
LOGIC IN 9
LOGIC IN 8
LOGIC IN 7
LOGIC IN 6
LOGIC IN 5
LOGIC IN 4
LOGIC IN 3
LOGIC IN 2

LOGIC IN 1

1

N/C
N/C
LOGIC IN 10
LOGIC IN 9
LOGIC IN 8
LOGIC IN 7
LOGIC IN 6
LOGIC IN 5
LOGIC IN 4
LOGIC IN 3
LOGIC IN 2
LOGIC IN 1
+5VDC

1

output is active, the output is 0V DC. The logic
outputs can supply up to 10mA of current each.

LOGIC OUT

13

25

+5VDC

14

1

10mA Maximum

GROUND

N/C
LOGIC OUT 10
LOGIC OUT 9
LOGIC OUT 8
LOGIC OUT 7
LOGIC OUT 6
LOGIC OUT 5
LOGIC OUT 4
LOGIC OUT 3
LOGIC OUT 2

LOGIC OUT 1

LOGIC OUTPUT Connection

Note: Pins 12, 13, and 24 are not used at this

time. They are reserved for future updates.

Do not

connect anything to these pins.

Connecting the REMOTE BUS

This is a 3-pin Phoenix-type connector
specifically for connecting the optional remote
control peripherals. Use a high-quality three­conductor shielded cable to make this connection,
such as Belden 8451, 9451, or equivalent. The
lower the nominal capacitance of the wire, the more
distance you can have between the remote control
and the DX8 before suffering transmission losses.

Strip the wire back about 1/4" inch, insert the
wire as far as it will go into the appropriate hole in
the supplied Phoenix-type connector, and tighten
down the screw with a small slot-head screwdriver.
It is recommended that you use 18, 20, 22, or 24
gauge wire for the remote control connections,
depending on the distance between the DX8 and
the remotes.

The

REMOTE BUS

connector is wired as follows:
Pin 1 = Ground (Shield)
Pin 2 = Data + (with +24V DC power)
Pin 3 = Data – (with +24V DC power)

Note: See the instructions with the remote

control for more information.

AC Power Considerations

LOGIC INPUT Connection

The

logic outputs

are active-low, open­collector outputs with internal pull-up resistors.
Connect the indicator or activation circuit between
the logic output and +5V DC (pin 1). When the

The DX8 can accept an AC voltage ranging from
90V to 240V without having to reconfigure the
primary wiring, due to the sophisticated design of
the switching power supply. Each DX8 draws an
average of 1 amp of AC line current at 120V AC.

Warning: Always use a 3-conductor AC power
cord with a safety ground connection. Never
remove the ground pin or attempt to bypass it. This
is very dangerous.

DX8 – 13

4. OPERATION

Quick Start

Reading the instruction manual is the only way
to fully understand the features and functions of the
DX8. However, the Quick Start provides a quick
overview to get the DX8 set up and working fast.

Make sure the power switch is off while setting
up and making connections to the DX8.

Make the Connections

Determine which inputs to use for
program sources and which to use for
microphones. Follow the wiring
diagram on the rear panel to make the
connections.

Make use of the

PHANTOM POWER

switches if any of the microphones
require phantom power. Phantom
power is present when the switch is in the UP
position.

Make use of the supplied Phoenix connectors
with appropriate wiring to connect to the amplifier
inputs. Connect the power amplifier outputs to
speakers appropriate for the amplifier’s specified
output power.

For maximum control and ease of use, connect a
personal computer loaded with the DX8-PC control
software to the

COMM PORT

on the DX8. The RS­232 serial port from the computer can be connected
to either

COMM PORT

on the DX8 (front panel or

rear panel).

Start Up

Before turning on the DX8, set the

all the way down.

Turn on the DX8 power switch. Open the DX8
control software on the computer and click
to begin the communication between the DX8 and
the computer.

Configure the DX8 for the current application.
Download the appropriate plug-ins, if installed. Set
all the EQ controls flat. Adjust the input mix level
controls and the
controls all the way down using either the fader
controls on-screen or the UP/DOWN buttons on the
front panel.

Note: When the UP/DOWN buttons are
pressed, the meters indicate the gain of the channel
relative to its maximum gain. After five seconds, the
meters revert to normal peak program metering.

MASTER A and B

output level

TRIM

MIC

+

G

–

LINE

+

–

G

controls

On Line

Set the Levels

MIC and LINE Input Trim

The analog trim controls on the rear panel are
not adjustable via the control software since these
are in the analog domain, prior to the A/D converters.
To adjust the

1. Start the program source playback for Input 1 or, if

a microphone is connected, have someone speak

into the microphone at a normal volume.

2. Adjust the Input 1 TRIM control so the meter

indication is at or around –10 dB. The peaks should

regularly hit, and occasionally exceed the –10 dB level.

This provides plenty of headroom for transient peaks.

Input Mix Levels

After setting the
instructed above, adjust the input mix levels to unity
gain. The control is at unity gain when both the –10
and –7 LEDs are lit. Adjust the UP/DOWN buttons
on the eight input channels individually to achieve a
balanced mix.

MASTER A and B Output Levels

Before adjusting the
level controls, turn on the power amplifier.

If the power amplifier has level controls:

1. Turn the amplifier level controls all the way down.

2. Adjust the MASTER A and B output level controls

until the –10 and –7 dB LED indicators light (or to

unity “U” on-screen). With program sources

playing, when the meter changes to peak program

metering, the peaks should regularly hit, and

occasionally exceed the –10 dB level. This provides a

nominal +4 dBu level at the BUS A and B OUTPUTS.

3. Slowly increase the amplifier level controls to

attain the volume level desired. If the volume gets

too loud too fast, adjust the MASTER A and B

output level controls to –15 dB or –20 dB. If the

volume level isn’t loud enough, adjust the

MASTER A and B output level controls to –7 or –4.

Be careful that the peak level doesn't hit the OL

(overload) indicator on the meter, which may run

the risk of driving the output into clipping.

If the power amplifier doesn’t have level
controls:

1. Slowly adjust the MASTER A and B output level

controls until the –10 and –7 dB LED indicators

light (or to unity “U” on-screen), or until the

desired volume level is attained. If the volume

level isn’t loud enough, adjust the MASTER A and

B output level controls to –7 or –4. Be careful that

the peak level doesn't hit the OL (overload)

indicator on the meter, which may run the risk of

driving the output into clipping.

MIC

and

LINE TRIM

MIC

and

MASTER A and B

controls:

LINE TRIM

controls as

output

DX8 – 14

Bus A and B Input Trim

There is no metering after the

TRIM

controls. These controls must be adjusted by
ear. Start the program source playback for all
sources connected to the
Slowly increase the
position (12 o'clock), which is unity gain. Then
adjust the
balance within the total mix.

TRIM

control up or down to attain a

BUS A

TRIM

control to the center

BUS A

or

BUS B

and B input

input.

Using the Digital Signal Processors

Using Inputs 1-8

Connect the microphones or program sources to
Inputs 1-8. Examples of program sources include a
CD player, tape deck, tuner, satellite feed, TV audio,
jukebox, or other audio source. Each input has a
separate Phoenix-type connector for a mic or line­level input.

TRIM

Use the
preamp stage according to the level of the input signal.
Refer to the "Quick-Start" section (Set the Levels) for
instructions on how to set the

TRIM

control to adjust the gain of the input

TRIM

controls.

The DX8 has five powerful floating-point 32-bit
digital signal processors (DSPs) to implement the
digital audio processing functions.

Channel 2-Band Shelving EQ

Each of the inputs is equipped with a 2-band
shelving equalizer. Use this to adjust the overall
tonal quality of the input signal.

Note: The channel EQ gain and corner frequency
are adjustable from the PC only.

Output 2-Band Shelving EQ

Each of the outputs is equipped with a 2-band
shelving equalizer. Use this to make broad
equalization adjustments to the output signals of
the DX8. The output EQ gain can be adjusted from
the front panel, and the EQ gain and corner
frequency can be adjusted from the PC.

The center gain position (0 dB) is indicated when
both "0" LEDs are lit on the meter.

Output 31-Band 1/3 Octave Graphic EQ/

5-Band Parametric EQ/Compressor

Each of the outputs is also equipped with a 31­band 1/3 octave graphic EQ. In addition, a 5-band
true parametric EQ and a compressor are available
on each output.

Note: These functions are adjustable from the
PC only.

Plug-Ins

A number of software plug-ins will be available
to download to the DX8 via the
connection to a PC. Plug-ins can be used along
with the EQs and compressor described above.
Check the Mackie Industrial website at

www.mackieindustrial.com for availability.

COMM PORT

LEVEL

The up/down arrow buttons on each channel are
used to adjust the mix level for each channel. Use
these to fine tune the mix or relative loudness of
each input signal that is connected to the DX8.

When adjusting these buttons, the channel
meter indicates the gain of the channel relative to
the maximum gain of +10 dB. After 5 seconds, the
meter reverts back to indicating the actual input
signal level of the channel. This metering is pre-EQ
and pre-LEVEL control.

Unity gain is indicated when the –10 and –7 dB
LEDs are both lit on the meter.

EQ

Each Input 1-8 has a 2-band shelving EQ. This is
adjustable from the PC only. It provides 15 dB of
boost or cut with user selectable corner frequencies
(LO: 20Hz-500Hz; HI: 500Hz-20kHz).

DIRECT OUTPUTS

The

DIRECT OUTPUTS

line-level signal from each of the 8 Input channels.
This signal comes from the output of the preamplifier
stage on each input channel, prior to the A/D
converter and subsequent digital signal processing.

Use the
ous music source (e.g., satellite feed, prerecorded
background music, multi-disc CD player) to a
telephone system music-on-hold input, or to provide
a feed to a multi-track recorder (for recording) or a
mixing console (for additional zone coverage).

DIRECT OUTPUTS

provide an unbalanced

to connect a continu-

Using the BUS A and B Inputs

These inputs provide a direct analog connection
to the

BUS A

and B buses. These input points are
post-DSP and post-D/A converter, and accept a
balanced analog line-level signal. Use these to connect
an additional program source to a zone, or to connect
the Zone A and B outputs from another DX8.

DX8 – 15

TRIM

Use the
at the
would be set to the center detent position (unity
gain). However, it can be adjusted up or down by
20 dB to achieve a balance between the signal at
the

BUS A

internal A and B buses.

TRIM

control to adjust the signal level

BUS A

and B inputs. Typically, this control

and B inputs, and the signal on the

Using the RECORD Output

Level Remote (2-Button/12-LED)

The A and B output signals are provided at the

RECORD

unbalanced RCA connectors. Connect these to the
Tape Input jacks on a tape deck or other recording
device to record the mix at the

output jacks, which are industry standard

BUS A

and B outputs.

OUTPUTS A and B

These outputs provide a balanced line-level
signal. Connect these outputs to the inputs of a
power amplifier.

Using the REMOTE BUS Connection

Connect one or up to nine remote controls to the

REMOTE BUS

an 8-position DIP switch that must be set to a
unique ID. When the DX8 is first turned on, it polls
the

REMOTE BUS

controls connected to it by each unique ID.

Many of the predefined functions have two ID
addresses assigned to it to accommodate situations
where two remote controls are required to control
the same function on a single DX8.

There are two remote control versions available:

Selection Remote (4-Button/4-LED)

connection. Each remote control has

and identifies the remote

This remote device can control a level,
preselected via the 8-position DIP switch, and
display the selected level on the LED meter. The
predefined functions include Input 1-8 level,

OUTPUT A

Group level, and Group 1-8 level. Note that the
remote control indicates the gain setting of the
channel, and not the signal level in real time.

Refer to Appendix D for a list of the predefined
functions available for the Level Remote Control.

or

B MASTER

level,

OUTPUT A

and

B

Connecting One or More Remote Controls

The remote control devices are connected to
the DX8 using a 3-wire half-duplex interface with
+24V DC phantom power. The
connection can provide power for up to nine
remotes. Provision is made to connect local power to
the remote controls if required in certain applications.

The maximum distance between the DX8 and
the remotes varies, depending on the type of cable
selected and the type of remote controls used. As a
general rule, using 22 gauge wire (at 0.014 Ω/ft. and
34 pF/ft), one remote can be up to 3000 feet away,
five remotes can be up to 2500 feet away, and eight
remotes can be up to 500 feet away before trans­mission losses become a factor (see the instructions
with the remote control for more information).

REMOTE BUS

This remote device is designed to select
functions such as preset selection, mute, and force­on/off. Each of the four buttons controls a single
function and its associated LED displays the
current state of the function.

Refer to Appendix C for a list of the predefined
functions available for the Selection Remote Control.

DX8 – 16

Using the LOGIC I/O

The DX8 has 10 general-purpose logic inputs and
10 general-purpose logic outputs. The inputs are
active low with internal pull-up resistors. The
outputs are active low open-collectors with internal
pull-up resistors. With the inputs or outputs
unconnected or inactive, the logic voltage level is
high (+5V). The active state is defined as voltage
low (0V or ground).

The logic functions assigned to each individual
logic input and output are configured using the DX8­PC application. In addition, each logic input and
output can be assigned a descriptive name (up to
32 characters) for easier identification within the
PC application.

Note: Logic I/O functions are set from the PC only.

Logic Inputs

Input 1 Down = 1
Input 2 Down = 2
Input 3 Down = 3
Input 4 Down = 4
Input 5 Down = 5
Input 6 Down = 6
Input 7 Down = 7
Input 8 Down = 8
Low EQ Down = 9
Hi EQ Down = 0

A number of functions can be activated by the

logic inputs:

Force-on/Force-off

This provides a means to temporarily increase or
decrease the gain of a channel with an external
switch. These are momentary functions and are
active only when the logic input pin is active (held
low). It affects a single input (only if the selected
input has no priority assigned), which is defined
when configured in the DX8-PC software
application, and forces the input fader level to the
fader on level or fader off level selected for that
channel. See “Audio In” on page 27 for more
information about the Force-on and Force-off function.

Channel Open

A logic output can indicate when a channel or
mix output gain is greater than –40 dB. For an input,
this includes either the Bus A or B mix level. For the
output, it is either the A or B mix output. Select the
channel from the DX8-PC application.

Preset Active

A logic output can indicate when a particular
preset is active. Choose the preset indicated by the
logic output from the DX8-PC application.

Priority Inactive

A logic output can indicate whether an Input
Force-on Priority is active, as selected from the
DX8-PC application.

Mute

This function can be activated in one of three

ways:

1. Momentary, where the mute function is
continuously active while the logic input is
continuously active.

2. Latching, where the mute function is activated or
deactivated (as specified during configuration)
when the logic input goes from inactive to active.

3. Toggling, where the mute function will toggle its
state when the logic input toggles between
inactive and active.

Preset Recall

This function can be activated as a momentary

function or as a latching function. When activated
as a momentary function, the preset state (1-16
states, defined when configured) is recalled only
when the logic input is active. When the logic input
is inactive, the DX8 returns to its base state
(normally, the state it was in prior to activating the
preset state), as long as no other momentary
function is in force.

When activated as a latching function, the

preset state is recalled when the logic input goes
from inactive to active. See “Presets” on pages
19 and 21 for more information about the preset
recall function.

Front Panel Lock

The

MODE

button on the front panel is used to
disable the front panel controls by selecting
The

LOCK

LED blinks for about five seconds before
it engages. When the LED lights steadily, the front
panel controls are disabled.

The Lock Code is set using the DX8-PC
application (see page 20, "Set Lock Code"). To
unlock the DX8 from the front panel, press the
bottom "Down" buttons on the front panel in the
correct numerical sequence, according to the
following chart:

Note: The default Lock Code is "1234."

LOCK

.

Logic Outputs

of different conditions.

greater than –40 dB is present on an input or an
output. Select the channel from the DX8-PC
application.

The logic outputs indicate the state of a number

Signal Present

A logic output can indicate whether a signal

Upgrading the Software

From time to time, Mackie Industrial will
release upgrades for the internal operating
software in the DX8. This can be downloaded
from our website (www.mackieindustrial.com) to a
PC-compatible computer. Use the serial port on
the computer to connect to the
the DX8 to transfer the data to the on-board flash
memory with the DX8-PC software.

COMM PORT

on

DX8 – 17