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
CHOC
NE PAS OUVRIR
DO NOT REMOVE COVER (OR BACK)
A LA PLUIE OU A L'HUMIDITE
SHOCK
ELECTRIQUE
SAFETY INSTRUCTIONS
1. Read Instructions — Read all the safety and operation instructions
before operating the 8•Bus Console and External Power Supply.
2. Retain Instructions — Keep the safety and operating instructions
for future reference.
3. Heed Warnings — Follow all warnings on the 8•Bus Console and
External Power Supply and in these operating instructions.
4. Follow Instructions — Follow all operating and other instructions.
5. Water and Moisture — Do not use the 8•Bus Console and
External Power Supply near water - for example, near a bathtub,
washbowl, kitchen sink, laundry tub, in a wet basement, near a
swimming pool, swamp or salivating St. Bernard dog, etc.
6. Heat — Locate the 8•Bus Console and External Power Supply
away from heat sources such as radiators, or other devices that
produce heat.
7. Power Sources — Connect the 8•Bus Console and External Power
Supply only to a power supply of the type described in these operation
instructions or as marked on the 8•Bus Console and External Power
Supply.
8. 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 8•Bus
Console and External Power Supply.
9. Object and Liquid Entry — Do not drop objects or spill liquids into
the inside of the 8•Bus Console and External Power Supply.
10. Damage Requiring Service — The 8•Bus Console and
External Power Supply should be serviced only by qualified service
personnel when:
A. 8•Bus Console and External Power Supply power-supply cord
or the plug has been damaged; or
B. Objects have fallen, or liquid has spilled into the 8•Bus Console
and External Power Supply; or
C. The 8•Bus Console and External Power Supply have been
exposed to rain; or
D. The 8•Bus Console and External Power Supply does not appear
to operate or exhibits a marked change in performance; or
E. The 8•Bus Console and External Power Supply has been
dropped, or its chassis damaged.
11. Servicing — Do not attempt to service the 8•Bus Console and
External Power Supply beyond those means described in this operating
manual. All other servicing should be referred to the Mackie Service
Department.
12. To prevent electric shock, do not use the 8•Bus Console and
External Power Supply polarized plug with an extension cord,
receptacle or other outlet unless the blades can be fully inserted to
prevent blade exposure.
Pour prévenir 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.
13 . Grounding or Polarization — Do not defeat the grounding or
polarization of the 8•Bus Console and External Power Supply.
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.
14 . Exposure to extremely high noise levels may cause permanent hearing
loss. Individuals vary considerably in susceptibility to noise-induced hearing
loss, but nearly everyone will lose some hearing if exposed to sufficiently
intense noise for a period of time. The U.S. Government’s Occupational
Safety and Health Administration (OSHA) has specified the permissible noise
level exposures shown in the following chart.
According to OSHA, any exposure in excess of these permissible limits
could result in some hearing loss. To ensure against potentially dangerous
exposure to high sound pressure levels, it is recommended that all persons
exposed to equipment capable of producing high sound pressure levels use
hearing protectors while the equipment is in operation. Ear plugs or protectors
in the ear canals or over the ears must be worn when operating the equipment in order to prevent a permanent hearing loss if exposure is in excess
of the limits set forth here.
Duration Per DaySound Level dBA,Typical
In Hours Slow ResponseExample
890Duo in small club
692
495Subway Train
397
2100Very loud classical music
1.5102
1105Patrice screaming at Ron about deadlines
0.5110
0.25 or less115Loudest parts at a rock concert
WARNING— To reduce the risk of fire or electric shock,
do not expose this appliance to rain or moisture.
To fully achieve the Mackie 8•Bus console’s
impressive headroom and specs, you should
“tune” channel sensitivity for each channel.
FOLLOW THIS PROCEDURE FOR
EACH CHANNEL IN USE:
1. Assign signal to channel fader:
■■ If channel will be used with a micro–
phone, MIC/LINE switch should be up &
FLIP switch should be up.
■■ If channel will be used with line input,
MIC/LINE switch should be down &
FLIP switch should be up.
■■ If channel will be used with a tape
input keep the FLIP switch down.
2. Set channel strip controls as follows:
■■ TRIM pot all the way counterclockwise
(+4dB)
■■ AUX SEND controls all the way counter-
clockwise (off)
■■ EQ switch up
■■ LOW-CUT switch either on or off
(on recommended for mic inputs)
■■ Pan hard left or right
■■ Channel fader at UNITY
■■ SOLO switch down
3. ■■ Make appropriate “noise” into the channel
input. For example, have a performer play/
sing/strike something or someone, etc., at
the level at which they’re going to record or
perform. Don’t just play a single sustained
note, but rather, jam away as you would be
during recording or performance. If the
channel is being used for a tape input
during mixdown, roll an already-recorded
track from your recorder.
4. The channel’s –20dB LED may light. The
L/R main meters will show the actual internal
operating level of soloed signals. Now you will
optimize levels.
5. ■■ For mic or line inputs, adjust the TRIM
control clockwise to get peaks that regularly
hit 0dB on the L/R meters. For mic inputs
this may require full CW rotation depending
on the sensitivity of the mic.
6. If desired (optional):
■■ Press the EQ switch in.
■■ Adjust the channel strip’s EQ to about
what you will be using during the session.
■■ Re-perform Step 5.
7. ■■ Return the channel strip’s SOLO button to
its up position.
8. ■■ Repeat Steps 1-7 on the next channel that
is being used.
Please put your serial number
here for future reference (i.e.,
insurance claims, tech support,
return authorization, gloating
privileges, etc.):
Serial #
24•8
32•8
Owner’s
Manual
Version
Rev. A
06/03
PLEASE! SAVE THE
SHIPPING BOX!
Yes, we know it’s only slightly smaller than a
doublewide mobile home, but you will need the
entire carton and internal foam if your console
ever needs service at some time in the future.
If your kids make the box into a fort and cut
holes in it — or if you stuff it in the dumpster of
the fast-food place next door to your studio, we
may have to sell and ship you another packing
box later on. Don’t end up buying an empty box!
1
TABLE OF CONTENTS
SECTION 2* —
Panel Layout and Function .. 4
INPUT CHANNELS ....................4
Fader .............................. 4
Mute.............................. 4
Pan & Assignment switches 4
–20 & OL LEDs ................. 5
Channel Solo .................... 5
Phantom power ................5
Trim.............................. 5
Mic/Line switch ................5
The Flip Switch:
Mic/Line or Tape? ............ 6
MIX-B / Monitor ............... 6
MIX-B Pan ........................ 6
MIX-B Level ...................... 6
MIX-B Split ....................... 7
EQ Section ........................ 7
HI Mid EQ ...................7
LO Mid EQ .................. 8
HI EQ ..........................8
LO EQ.......................... 8
EQ In/Out .................... 8
LO cut ......................... 8
AUX Sends ........................ 8
AUX 1 & 2 .................... 9
Pre (1&2) ................... 9
AUX 3, 4, 5, 6 ............... 9
Shift ............................. 9
Source .........................9
Pre (3-6) ..................... 9
OUTPUT SECTION ............. 10
8•Bus Faders ................. 10
L Mix and R Mix ............10
Mono L & R .....................10
Solo............................ 10
L/R Mix Fader ................ 10
Metering Bus
Meters 1-8 ................. 11
Main/Solo Meters ..... 11
AUX Sends ...................... 11
AUX Solo ......................... 12
Stereo AUX Returns ....... 12
Returns 1 & 2 ............ 12
Assign (1&2) ............. 12
Returns 3 & 4 ............ 12
Assign (3&4) ............. 12
Returns 5 & 6 ............ 12
MIX-B/Monitor .......... 12
Phones ....................... 13
Monitor ..................... 13
Solo ........................... 13
Talkback ................... 13
Jack panels (input strip
and Master output) ....... 14
Input Strip ................ 14
Phantom power ........ 14
BNC sockets .............. 14
Mic In ........................ 14
Line In ....................... 14
Direct Out ................. 14
Channel Insert ..........14
Output Panel .................. 15
Submaster Inserts .... 15
AUX Sends ................ 15
AUX Returns ............. 15
Main Inserts .............. 15
Control Room Output 15
Main Mix ................... 16
REAR PANEL
CONNECTIONS .................. 17
SECTION 3 —
General Information ............. 19
LEVELS ...............................19
BUSES ................................ 20
SENDS & RETURNS .......... 20
SOLO ................................... 20
EQ ....................................... 20
CONNECTORS ....................22
A BIT MORE ON
MIX-B/FLIP ........................ 22
SECTION 4 —
Recording ............................23
RECORDING OVERVIEW .. 23
SETUP ................................. 23
RECORDING &
OVERDUBBING ..................23
MIXING OVERVIEW .......... 27
MIXING SETUP .................. 28
DOING THE MIX ................28
SECTION 5:
PA and Sound Reinforcment
Applications .........................37
SETUP ................................. 37
HOUSE AND MONITOR MIX
TOGETHER ........................ 42
MAKING A SIMULTANEOUS
RECORDING .......................42
HOUSE MIX ONLY or
MONITOR MIX ONLY .........42
FINDING MORE INPUTS ... 43
MIX-B Output ........... 16
Phones ....................... 16
Studio Output ........... 16
2-Track Input and
External Input .......... 16
Tape Returns .................. 17
Tape Return
Operating Level .............. 17
Submaster/Tape Outputs17
Submaster/Tape Output
Operating Level .............. 17
Main Bal. Outputs ......... 18
Expander Port................ 18
DC Power in ................... 18
Noise ................................ 19
Headroom ....................... 19
Unity Gain ...................... 19
Metering.......................... 19
Using Buses .................... 23
Monitoring ..................... 23
Cue Mix ........................... 23
Wet or Dry Monitor? ...... 24
Let’s Record! ................... 27
Overdub, Anyone? .......... 27
Pick a Model ................... 28
Consider Compression .. 28
Using External Processing 28
Insert Devices ................. 28
Send / Return Devices ....35
Using Subgroups ............35
Finding More Inputs:
Mix-B to L & R Buses .....35
Monitoring and Levels .. 36
About Automation ......... 36
Headphones .................... 42
Mic Splitters ................... 43
APPENDIX A: Connections .. 44
“XLR” CONNECTORS ......... 44
1/4" TRS PHONE PLUGS
& JACKS ............................. 44
1/4" TS PHONE PLUGS
& JACKS ............................. 44
SWITCHED 1/4"
PHONE JACKS ................... 44
RCA PLUGS & JACKS ........ 45
UNBALANCING A LINE ..... 45
SPECIAL CONNECTIONS .. 45
TRS Send/Return
Insert Jacks .................... 45
Using the send
only of an
insert jack ............. 45
Using return only ...... 46
AUX RETURNS: Mono, Stereo,
Whatever ......................... 46
MULTS AND “Y”s ................ 46
APPENDIX B: Options,
Add-Ons and Extra Stuff ...... 47
METER BRIDGE ................ 47
SIDECAR ............................ 47
UN-CIGARETTE LIGHTER .. 47
MIXING SHOES ................. 47
APPENDIX C: Specifications .. 48
GAIN/LEVEL CHART............48
DIMENSIONS ..................... 49
BLOCK DIAGRAM .............. 52
SERVICE .............................. 54
TROUBLESHOOTING ........ 54
FACTORY SERVICE ........... 54
SERVICE FROM AN
AUTHORIZED SERVICE
CENTER .............................. 55
TRACK SHEET .................... 56
8•BUS LIMITED WARRANTY 61
* Why did we start with Section 2? As a
matter of policy, our Manual Table of Contents
always skip things that are on the facing page to
the actual listing. Seems like we’re stating the
obvious to tell you that the Introduction is next
to your right hand.
2
SECTION 1: Introduction
The Mackie 8•Bus Series is a flexible ‘in-line
monitoring’ style console. They are available with
24 or 32 microphone/line inputs fed into 8 submix
buses, 2 stereo mix buses and 6 auxiliary send
buses. There are 24 or 32 tape return inputs for
multitrack monitoring and mixing or for use as
additional line inputs. The 8•Bus Series is designed to be the mixing and communications hub
in a multitrack recording studio and is also an excellent choice for sound reinforcement work.
Numerous inputs, flexible sends and terrific EQ
combined with the legendary Mackie headroom
and noise floor specs make your work easy. It’s
clean. It’s quiet. It’s packed with features. It’s affordable… So pat yourself on the back! You’re
doing something sensible here!
IF YOU IGNORE MANUALS...
You’ll probably ignore this one, too. That’s OK,
the crack Mackie Documentation Department will
get to go on their annual “Typing Without Walls”
outing at campsite four in the Woodinville RV
Park anyway.
But this is a really great manual! It’s got Where
It Is and What It Does and How To Use It covered
totally, with pictures and diagrams and absolutely
no pop quizzes.
Do yourself a favor and at least check out
Section 2 and the block diagram for starters. The
8•Bus Series has a number of routing tricks that
could be hard to suss out without a guide. Then, if
that’s all you can take without pumping some
sound through the console, put the manual in the
bathroom for future reference or read it while you
eat your lunch.
If you’re even more terminally impatient, try to
look for these two icons:
PANEL LAYOUT
AND FUNCTION
GENERAL INFORMATION
RECORDING
PA AND SOUND
REINFORCEMENT
APPENDICES
(CONNECTIONS, ADD-ONS, SPECIFICATIONS, ETC.)
SERVICE
MASTER TRACK SHEETS
FOR DUPLICATION
LAYOUT
AND
FUNCTION
GENERAL
INFO
RECORDING
PA & SR
ADD-ONS
SPECS
ETC.
SERVICE
TRACK
SHEETS
They cover information that is absolutely critical or is unique to the 8•Bus Series. At some
point, it’s still a good idea to browse through the
rest of the manual.
In addition, sections marked
with the A CLOSER LOOK icon
include in-depth information…
or at least our own opinions.
BLOCK DIAGRAM
3
BLOCK
DIAGRAM
EQ IN
75 Hz
18dB/oct
LOW CUT
LR
U
OO
+15
HI/LO EQ
TO MIX-B
MIX-B
MONITOR
SPLIT EQ
FLIP SW
CHANNEL
PAN
SOLO
MUTE
24
dB
10
SECTION 2: Panel Layout and Function
PAN
OVERVIEW
LEVEL
SOURCE
OL
-20
The panel layout of the Mackie 8•Bus Series
follows the traditional arrangement: input channel strips to the left, with a master output/
monitoring/cue section to the right. Additionally,
most of the Mackie input/output jack panel is
located at the top of the mixing panel, for easy
accessibility and patching. The tape outputs and
inputs are on the rear panel.
INPUT CHANNELS (CHANNEL STRIPS)
8•Bus consoles are identical, and contain all of the
level, assignment and equalization controls for each
input channel. This section describes the controls
and functions of each feature of an input channel in
detail.
FADER
with a precise logarithmic taper and attenuation in
dBs printed along the slot for exact and repeatable
level adjustments. The fader affects either the mic or
line input to the channel (for recording) or the tape
return to the channel (for mixing), depending on
The 24 or 32 input channel strips on the Mackie
The channel fader (1) is 100 millimeters long,
the position of the FLIP switch.
5
U
5
10
20
30
40
50
60
OO
1-2
3-4
MUTE
The MUTE switch, located at the top of the
fader (2), turns off the primary outputs of the
5-6
7- 8
channel: the eight buses, the L & R buses, the
channel solo, the direct output and the postfader AUX sends. Pre-fader aux sends are not
muted. With the exception of lighting the mute
L/R
MIX
LED, pushing the MUTE switch is the same as
pulling the fader all the way down.
GOURMET PAN CONTROL AND
ASSIGNMENT SWITCHES
CHANNEL INPUT/OUTPUT
MASTER
I/O
The PAN control (3), immediately above the
fader, pans the channel signal between the two sides
of the L/R Mix buses, and also between odd and even
pairs of buses 1 through 8.
CHANNEL STRIPS
The actual bus assignment of the PAN control
depends on the positions of the five assignment
MASTER
SECTION
switches located along the length of the fader.
With no switches depressed, the PAN control has
no effect (well, unless you solo the channel; it
still pans the solo).
Pushing the L/R MIX switch (4) assigns the PAN
to the main L /R Mix buses. Panning from L to R
moves the sound smoothly (with constant loudness)
CHANNEL INPUT/OUTPUT
from the left channel to the right channel. Assigning
the PAN to a pair of the 8 buses has a similar effect.
MASTER
I/O
CHANNEL STRIPS
MASTER
SECTION
For example, pushing the 1-2 switch assigns the PAN
to buses 1 and 2, and panning L to R will move the
sound from bus 1 to bus 2 (from odd to even).
If you want to equally assign a channel to both
buses 1 and 2, leave the PAN control at the top, or
center, of its travel. If you only want bus 2, turn the
PAN control fully clockwise (to the right).
Other comparably-priced consoles provide as
little as 50dB attenuation/separation. We use active,
buffered circuitry and a custom-taper potentiometer
4
to achieve 87dB attenuation. You get far better
channel separation plus freedom from level shifts
caused by channel assignment and panning. In
addition, our pan pots are constant loudness.
When you sit between a pair of monitors and pan
from side to side, the apparent volume at your
ears should stay the same, no matter where the
signal is positioned. Our special pan circuitry
maintains consistent apparent energy whether the
pot is dead center, hard left or hard right.
–20 AND OL LEDs
The two LEDs (5) next to the PAN control check
the channel strip signal level at three important circuit points: at the output of the mic/line preamp,
after the EQ and after the channel fader amplifier.
The green LED marked –20 is there to assure
you that, yes, something is plugged into the channel
(and yes, it does have some output). Most signals
more interesting than tape noise will cause the
green LEDs to flicker, so they give you a good visual
indication of which channels are active. Any peaks
higher than –20dBu (@ 1kHz) trigger the indicator.
When we say “channel”, we mean the signal going
through the channel fader… but not the signal
going through the MIX B Section. Please refer to the
MIX B section of this manual, starting on the next
page, for more details.
The red LED, labeled OL for overload, lights
when the signal level is high enough to cause clipping at any of the three test points. In normal
operation it will almost never light. If it is flashing at
you, your level in that channel is much too high. You
need to turn something down.
• First try the mic/line trim. If that has no effect,
• Turn down the EQ and/or the insert device,
and if that doesn’t fix it,
• Turn down the channel. If this doesn’t fix it, your
input signal is too hot (gasp). Use an external pad
to reduce the level (see the sidebar on page 24).
CHANNEL SOLO
The channel SOLO switch (6) assigns the output
of the channel PAN control to the stereo solo buses
and disconnects all other sources from the monitor
section. SOLO does not interrupt the eight Submasters, the L/R Mix or the AUX sends, and can be
used at any time without affecting the recording
process.
SOLO is handy for spot-checking the presence
and quality of individual inputs while setting up,
recording and mixing. More than one SOLO switch
may be pressed at the same time, allowing you to
listen to the blend of any combination of channels
throughout the console in stereo.
On the Mackie 8•Bus console, the SOLO
assignments are stereo except for the AUX sends.
SOLO maintains the perspective set up with the
PAN controls. When any SOLO button on the console is depressed, its associated SOLO LED will glow
steadily, and the RUDE SOLO LITE above the
8•Bus LED meters blinks annoyingly, serving as a
reminder with an attitude.
The channel SOLO function is normally postfader/post-mute, but can be modified for PFL or
Pre-Fade (and pre-mute) Listen. See Appendix B:
Options, Add-Ons, and Extra Stuff.
Note: All the SOLO buttons on the 8•Bus
Series operate in the same way (although
they’re not all stereo like the channel SOLO).
SOLO does not interrupt recording; it only
affects the control room monitor.
HIGHLY, MEGA-MONDOIMPORTANT: SOLO is
intended for more than just
“soloing.” It is THE way to set
levels for best noise and headroom. Complete instructions on proper level
setting using SOLO are in Section 3: General Information, starting on page 19.
PHANTOM POWER
CAUTION: After switching PHANTOM Power
on or off, wait 1 minute before changing any
mic/line switch settings in that 8-channel block.
At the top of every eight channels is a PHANTOM
Power switch (7). Pressing it sends +48VDC to
the eight XLR sockets to the switch’s left. For
instance, depressing the PHANTOM switch above
Channel 8 sends phantom power to the XLRs on
channels 1 through 8. NOTE: It is always a good
idea to check with the Mic manufacturer to
verify phantom power requirements.
TRIM
The TRIM control (8) sets the gain of the
input amplifier for the MIC and LINE inputs.
Proper setting of the TRIM control is essential
for good noise and headroom performance. Trim
pot settings may vary widely depending upon
the input level. The output of different keyboards, drum machines, guitar effects boxes,
etc., vary from extremely weak to so hot that
they can practically be connected directly to
speakers. See pages 1, 19, or 24 for advice.
MIC/LINE SWITCH
Now we’ve jumped back to the top of the
strip. Sorry, but logically the input to the channel is the next thing to talk about. That’s
because it’s the source of the signal applied to
the channel fader and PAN control.
PHANTOM
POWER
CHANNEL
24
G
A
C
I
I
N
M
dBV
–10
S
E
N
I
L
+4
-40
dBV
10
dB
50
dB
TRIM
GAIN
U
–15 +15
3k
1k5k
500 18k
2
1
3
12
U
–15 +15
250
220350
45 3k
U
–15 +15
U
–15 +15
EQ
75 Hz
18dB/oct
LR
U
OO
+15
HI/LO EQ
TO MIX-B
MIX-B
MONITOR
FLIP SW
CHANNEL
PAN
SOLO
MIC/LINE
E
N
S
I
T
I
V
I
T
Y
LINE
IN
BAL-
UNBAL
DIRECT
OUT
INSERT
TIP = OUT
RING = IN
CHANNEL
24
MIC/LINE
TAPE
FLIP
HI
MID
FREQ
NORMAL
BAND
WIDTH
OCTAVES
LO
MID
FREQ
HI
12k
LO
80
EQ IN
LOW CUT
PAN
LEVEL
SPLIT EQ
SOURCE
OL
-20
5
LOW CUT
PHANTOM
POWER
The MIC/LINE switch (9) is located way up
amongst the channel jacks. It selects whether
the MIC jack (pin 2=hot[+], pin 3=cold[–],
pin 1=shield) or the LINE jack (balanced 1/4"
phone… tip=hot, ring=cold, sleeve=shield) is
CHANNEL
connected to the input amplifier.
24
MIC/LINE
LINE
BAL-
UNBAL
DIRECT
OUT
INSERT
TIP = OUT
RING = IN
CHANNEL
24
G
A
C
I
I
N
M
–10
dBV
S
E
N
E
S
N
I
I
T
L
I
V
I
T
Y
+4
-40
dBV
MIC/LINE
10
dB
50
dB
TAPE
TRIM
GAIN
LR
U
LEVEL
OO
+15
HI/LO EQ
TO MIX-B
MIX-B
MONITOR
SPLIT EQ
FLIP SW
CHANNEL
SOURCE
OL
-20
PAN
SOLO
MUTE
24
dB
10
5
U
5
10
20
30
40
50
60
OO
1-2
3-4
5-6
7- 8
L/R
MIX
THE FLIP SWITCH: MIC/LINE OR TAPE
IN
indicates, the MIC/LINE input (after Mic/Line
preamp) is fed to the channel fader when the
FLIP switch is in the up position. This is the
normal mode for tracking and overdubbing. In
the down position, the TAPE return (the output
signal from the corresponding track of your recorder) is fed to the channel fader. This is the
normal position for mixdown.
To recap - when the FLIP is up, the Mic/Line
feeds channel and Tape return feeds MIX-B. When
the FLIP is down, the channel is Tape and MIX-B is
MIC/LINE. FLIP... FLOP. OK?
PAN
For live PA, leave the FLIP switch up.
The switch labeled FLIP
(10) selects the input that is
actually fed into the channel
fader (and the MIX-B control; see below). As the label
MIX-B / MONITOR
Each channel strip has a
dual signal path (Enter MixB!) with extremely flexible
switching. This allows either
the mic/line inputs or tape
return inputs to be routed through either the
channel fader path or Mix-B with separate EQ
and monitoring. Both of the signal paths can
be combined into the main mix by depressing
the Mix-B to L/R Switch in the master section.
OK, now we jump down the channel again to
the MIX-B/Monitor section. This handy and very
simple feature is also called “in-line monitoring”
and is found on quite a few consoles. So we’re
not claiming that it’s anything new… we just
added some extra features for more flexibility.
MIX-B/Monitor routing options can get a bit
complicated, so pay attention. Also, we did add
something that other in-line monitoring systems don’t have. So double pay attention.
The MIX-B buses are a stereo pair, independent of the 8-plus-2 recording buses we’ve
talked about so far. There are three sources
available to MIX-B: MIC/LINE or TAPE (via the
FLIP switch) and the pre-fader output of the
channel strip (via the SOURCE switch). A
fourth source, post-fader output of the channel
strip (via the source switch), can be achieved
by modifying the channels. Instructions for this
modification can be found on our website at
www.mackie.com (click on Support). Or you can
call Tech Support at 1-800-258-6883 for assistance.
1. When the Mix-B SOURCE switch (11) is
up, MIX-B receives its input from the FLIP
switch. Remember, the FLIP switch alternates MIC/LINE or TAPE to the channel
strip and to MIX-B. With TAPE as an input
(SOURCE up to select the FLIP switch, and
FLIP in the up position), the MIX-B section
functions as a tape monitor submix, allowing
you to listen to the inputs and outputs of
your multi-track recorder as you record. This
is the most common use of the MIX-B
section, during tracking and overdubbing.
2. With MIC/LINE as an input (SOURCE up to
select the FLIP switch, and FLIP in the down
position), MIX-B becomes an additional input
to add tracks or effects during a mixdown.
Simply plug the additional signal into the MIC
or LINE connector. Although they are normally separate, a button (MIX-B TO L/R MIX)
in the Output Panel (see below) can add the
output of the MIX-B buses to the L/R Mix
buses. Voilà! Double your mix inputs!
3. With CHANNEL as an input (SOURCE down in
CHANNEL position), MIX-B taps its signal from
the channel strip, just before the channel fader.
MIX-B is separately pan-able, EQ-able and
can be used as an alternative stereo mix, a
stereo auxiliary send, a “mix-minus” bus, a
quadraphonic or surround feed, you name
it. Mix B can also have its own aux send
(see Aux sends 3-6).
Check out Section 3: General Info and the
Block Diagram for more information on MIX-B
routing.
MIX-B PAN
The PAN control (12) routes the channel’s
MIX-B signal across the left and right MIX-B buses.
MIX-B LEVEL
The LEVEL control (13) sets the level of
the channel sent to the MIX-B buses. The gain
structure of this circuit (like the AUX send
1–6 circuits, below) includes extra amplification. What this means to you is that you will
always have plenty of gonadotropic gain available for the MIX-B buses. Full left on the
LEVEL control is off; the midpoint of travel is
“U”, or unity gain; full right is 15dB of boost.
6
SHIFT
MIX-B SPLIT
The SPLIT switch (14) in the
MIX-B section splits the EQ section of the channel when
depressed. In the up position, all
four sections of EQ remain, if engaged, in the primary channel
signal path feeding the channel
fader and the 8-plus-2 buses. In
this mode there is no equalization
in the MIX-B path.
When the SPLIT switch is depressed, the HI and LO shelving
sections of the EQ are removed
from the channel signal and inserted into the MIX-B signal
path. The HI-MID and LO-MID
parametric sections of the EQ remain, if engaged, in the channel
signal path.
The SPLIT function allows you to
EQ the channel’s signal and its MIXB signal separately.
Note: When the EQ is split, the
main EQ IN/OUT switch only
switches the channel signal’s parametric sections. It does not affect
the shelving sections split to MIX-B.
EQ SECTION
Each 8•Bus channel strip equalizer section has four bands (HI MID,
LO MID, LO, and HI) plus a low-cut
filter. The equalizer can be split between main channel signal and
MIX-B signal.
HI MID EQ
The HI MID EQ section (15) is a
true 3-control parametric design,
offering: A) bandwidth variable
from 3 octaves to 1/12 octave (16);
B) ± 15dB of equalization (17) and;
C) variable frequency center from
500Hz to 18kHz (18).
We spent a lot of time on this
part of the 8•Bus Series’ EQ. One
of the things we’ve always noticed
about lower-priced consoles was
how “drastic” their Hi Mid EQ
sounded. Even a little boost could
induce honkiness and nasality.
Frankly, Hi Mid EQ on many
boards is not that useful in studio
applications for just this reason.
+15
+10
+5
0
–5
–10
–15
Hz
20
+15
+10
+5
0
–5
–10
–15
20Hz100
+15
+10
+5
0
–5
–10
–15
20
+15
+10
+5
0
–5
–10
–15
20
+15
+10
+5
0
–5
–10
–15
20
+15
+10
+5
0
–5
–10
–15
20
Hz
100
Freq. center: 1k;
Bandwidth: 1/12-octave;
±15dB boost/cut
Hz
Freq. center: 1k;
Bandwidth: 1-octave;
±15dB boost/cut
Hz
100
Hz
Freq. center: 1k;
Bandwidth: 3-octave;
±15dB boost/cut
Hz
100
Hz
Freq.: 500Hz-18kHz sweep;
Bandwidth: 1/12-octave;
±15dB boost/cut
Hz
100
Hz
Freq.: 500Hz-18kHz sweep;
Bandwidth: 1-octave;
±15dB boost/cut
Hz
100
Hz
Freq.: 500Hz-18kHz sweep;
Bandwidth: 3-octave;
±15dB boost/cut
When you put these consoles on
the test bench, you see that the
bandwidth of their EQ is simply
too narrow — often around one
octave. This is OK for extreme
adjustments in live situations,
Hz
1k
but that’s about it. It’s just not
Hz
10kHz20k
wide enough to gently alter the
multiple octaves that voices and
instruments span.
This is just
the opposite
of “classic”
big-studio
consoles.
Their EQ (including Hi Mid)
1k
Hz
can be adjusted to be extremely
10kHz20k
Hz
broad — three or more octaves
wide in many cases. When you
apply this wideband EQ, it
sounds far more “sweet” and
“natural.” Changes sound so
gradual and smooth that you can
24
CHANNEL
MIX-B
U
–15 +15
3k
1k5k
500 18k
2
1
3
12
U
–15 +15
250
220350
45 3k
U
–15 +15
U
–15 +15
EQ
75 Hz
18dB/oct
PRE
SOURCE
HI
MID
FREQ
NORMAL
BAND
WIDTH
OCTAVES
LO
MID
FREQ
HI
12k
LO
80
EQ IN
LOW CUT
add considerably more EQ than
would ever be possible with narrower-band consoles, yet without
1k
Hz
compromising the overall sound.
10kHz20k
Hz
On the other hand, ultra-narrow-band EQ also has its place,
both as a corrective tool and for
special effects. So why not give
you even tighter control than
would be possible with a 1/3octave graphic equalizer? Thus
was born the 8•Bus’ 1/12-octave
to 3-octave width range.
1k
Hz
10kHz20k
At this point, as we played
Hz
around with the Bandwidth and
Boost/Cut controls using actual
music, we realized that to limit
this circuit to just Hi Mid (typically above 2.5kHz) would
actually limit its usefulness. The
flexibility that true parametric
control provides is nice to have in
the octaves below the Hi Mid re-
1k
Hz
10kHz20k
Hz
gion as well. So we came up with
what is probably the first console
Hi Mid control that can be swept
all the way down to 500Hz. If Hi
Mid doesn’t do it for you as a
name, think of these three
controls as the RovingParametric-Problem-Solver-O-Matic.
O-Rama.
1k
Hz
10kHz20k
Hz
7
NORMAL
2
1
3
12
U
–15 +15
250
220350
45 3k
U
–15 +15
U
–15 +15
EQ
75 Hz
18dB/oct
LR
U
OO
+15
HI/LO EQ
TO MIX-B
MIX-B
MONITOR
FLIP SW
CHANNEL
BAND
WIDTH
OCTAVES
LO
MID
FREQ
HI
12k
LO
80
EQ IN
LOW CUT
PAN
LEVEL
SPLIT EQ
SOURCE
Now you know some of the design philosophy behind our Hi
Mid EQ. It’s time to start experimenting with it yourself. Don’t
forget to try the control at its
bandwidth extremes — especially at the 3-octave end. You’ll
be pleasantly surprised.
Conversely, if you hate technology and yearn for the sound of
that old board you sold to buy an
8•Bus, you can achieve a semiparametric sound by leaving the
BANDWIDTH knob in the middle
at 2 octaves.
LO MID EQ
The LO MID EQ control (19)
is a semi-parametric (sweepable)
equalizer with a broad, fixed
bandwidth of 2 octaves, ±15dB of
equalization and frequency
variable from 45Hz to 3kHz.
Boosting in this range can put
warmth and body into vocals and
instruments. Cutting can really
help the clarity of some sounds
by reducing boxy and boomy
tones.
HI EQ
The HI EQ control (20) is a
fixed 12kHz shelving equalizer
with ±15dB of equalization available. A great treble control, it is
switched with LO EQ into the
MIX-B circuit if the SPLIT button is depressed.
Shelving equalizers work on a
very broad range of frequencies,
and consequently, are very musical. In a 12kHz shelf like this
section, that means that all the
upper harmonics of a sound are
raised evenly, basically keeping
their original musical relationship to each other. A
high-frequency shelving EQ is
great for putting shimmer into
acoustic guitar and piano tracks
and sizzle into vocals.
LO EQ
The LO EQ control (20) is a
fixed 80Hz shelving equalizer
with ±15dB of equalization avail-
8
+15
+10
+5
0
–5
–10
–15
20
Hz
100
Hz
Lo Mid EQ
2 octave ±15dB boost/cut
+15
+10
+5
0
–5
–10
–15
20
Hz
100
Hz
Lo Mid EQ sweeps
from 45Hz to 3kHz
+15
+10
+5
0
–5
–10
–15
20
Hz
100
Hz
Hi EQ ±15dB boost/cut
above 12kHz
+15
+10
+5
0
–5
–10
–15
20
Hz
100
Hz
Lo EQ ±15dB boost/cut
below 80Hz
+15
+10
+5
0
–5
–10
–15
20
Hz
100
Hz
Lo cut (high pass filter)
18dB/oct. at 75hz
+15
+10
+5
0
–5
–10
–15
20
Hz
100
Hz
Interaction of Lo Cut
with Lo EQ boost.
Verrry eenteresteeng, no?
able. It’s a fine bass control, and is
switched with HI EQ into the
MIX-B circuit if the SPLIT button
is depressed.
A low-frequency shelving
equalizer will add or remove bass
in a smooth, musical fashion.
1k
Hz
10kHz20k
Hz
Good for working on bass drum
and bass guitar, fattening up (or
thinning out) a piano or contouring an entire mix.
EQ IN/OUT
The IN switch (22) bypasses the
EQ (though not the LO CUT filter)
when up. Depress it to enable equal-
1k
Hz
10kHz20k
ization.
Hz
LO CUT
The LO CUT switch (23) inserts
an 18dB/octave low-cut (high-pass)
filter with a –3dB point of 75Hz into
the main channel signal. The LO
CUT filter is unaffected by the EQ IN
switch.
A low-cut filter is handy to get rid
1k
Hz
1k
Hz
1k
Hz
1k
Hz
of room rumble, traffic noise, wind
10kHz20k
Hz
noise, popping, and other unwanted
very-low-frequency sounds. It can
also be combined with LO EQ boosts
to produce some interesting bass
curves as shown in the last EQ
graph on this page. It is highly rec-
ommended that this switch be
engaged for vocal microphones, especially in a live P. A. situation.
10kHz20k
Hz
AUX SENDS
Auxiliary sends are generally
used to provide mixes for headphone cueing and for effects sends,
and in Sound Reinforcement use,
can be assigned monitor submix
duties. The 8•Bus Series consoles
provide 6 mono auxiliary sends with
several routing options.
10kHz20k
Hz
Note: All of the 8•Bus Series
AUX sends have a very wide range
of gain (just like the MIX-B Level
control discussed earlier). The
first half of the control’s rotation
reaches from the off position to
unity gain (U). This half of the
control’s range corresponds to the
full range of a conventional mixer.
The second half of the control’s
10kHz20k
Hz
rotation provides you with even
more gain, from unity to +15dB.
L
T
I
V
I
T
For example, when you want a super “wet”
sound(mostly reverb), the extra gain allows you to
bring the channel fader part way down (and the
AUX send way up) so the sound is mostly reverb
with just a touch of “dry” signal.
Don’t worry about having mono effects sends:
almost all effects units, mono or stereo, have mono
inputs. Even if there are two jacks labeled Left and
Right, they are almost always combined into mono
internally. In the rare cases when an effect actually
has true stereo inputs, it is often more convenient
to ignore that and treat it as mono anyway. If you
really need to send in stereo, just use two AUX
sends from the console. Route AUX 1, for example,
to the left input and AUX 2 to the right. Then adjust the stereo perspective by favoring one or the
other send. For instance, if you have a stereo synth
into channels 23 and 24, use AUX 1 on channel 23
and AUX 2 on channel 24.
Note: In PRE mode, all AUX SENDS are
connected pre-fader but post-EQ. This is usually the most useful setup, but if you prefer, all
AUX SENDS can be modified to be pre-EQ,
pre-fader. Instructions for this modification
can be found on our website at www.mackie.com
(click on Support). Or you can call Tech Support
at 1-800-258-6883 for assistance.
AUX 1 & 2
Auxiliary sends 1 & 2 (24) have two independent level controls and share a common
PRE/POST switch.
When in the normal post mode, sends 1 & 2
get their signal after the channel fader and the
MUTE switch. This is the usual configuration
for an effects send, since the level of the effect
should follow the volume adjustments made by
the channel fader.
AUX 3, 4, 5, 6
Auxiliary sends 3, 4, 5, and 6 (26) are very similar to sends 1 & 2. The differences are in the
SHIFT and SOURCE switches. Read on.
SHIFT
The SHIFT button (27) connects the two level controls,
as a pair, to either sends 3 &
4 (in the up position) or to
sends 5 & 6 (in the down
position). Twice the sends in half the space.
SOURCE
The SOURCE switch (28) breaks AUX Sends
3-6 away from the main channel strip world that
sends 1 & 2 are stuck in, and allows the sends to
tap from another source: the MIX-B signal for that
channel. This is a very handy thing, whatever you
happen to be using MIX-B for.
If MIX-B is an additional input for your mixdown, then (when the SOURCE switch is
depressed) AUX Sends 3-6 are effects sends
connected to that source. If MIX-B is your studio monitor submix from the recorder, then
AUX Sends 3-6 are a great source of headphone cue signals. They will follow playback,
record and punch-ins automatically as your
recorder does its stuff.
PRE (3-6)
The PRE switch (29) for Sends 3-4-5-6 functions just like the PRE switch sends 1 & 2, when
the AUX SOURCE switch is in the CHANNEL (up)
position.
Additionally, the PREswitch will tap the prelevel (and pre-mute) signal of whichever
SOURCE you have selected-channel or MIX B.
Y
+4
-40
dBV
MIC/LINE
10
dB
50
dB
TAPE
TRIM
GAIN
FLIP
U
1
OO
+15
U
2
OO
+15
AUX
PRE
U
3
5
OO
+15
U
4
6
OO
+15
AUX
SHIFT
24
PRE
CHANNEL
MIX-B
SOURCE
PRE (1&2)
With the PRE switch (25) depressed, AUX
SENDS 1 & 2 receive their input from a point
before the channel fader and MUTE switch, and
are not affected by changes in these controls.
This is the normal switch setting for creating
stage monitor and/or studio cue headphone
sends.
9
LAYOUT
AND
FUNCTION
OUTPUT SECTION
The output section is the large area to the right of
the input channel strips. It contains the master faders and metering, as well as the send and return
masters, cue, monitoring and communication
controls.
8•BUS FADERS
At the bottom of the output panel are the master faders for each of the eight buses (1). Each
fader controls the level of its mix, with precise dB
markings and a unity gain point marked on the
panel. The fader is located in the circuit after the
submaster insert jack but before the final line
amplifier.
There is an Assign section associated with each
bus fader, detailed below. Note that no matter
what the selection of the assignment switches, the
output of each bus is always present at its Submaster/Tape Output jack and is monitored on its
own bus meter.
L MIX and R MIX
The odd-numbered buses have an L MIX button above their faders (2); the even buses have an
R-MIX button (3). Pressing this button assigns
the bus to the L or R Mix bus, respectively. This
switch, along with the MONO L & R switch dis-
SOLOSOLOSOLOSOLOSOLOSOLOSOLOSOLO
ASSIGN
MONO
dB
10
5
5
10
20
30
MONO
L+R
L
1
L+R
MIX
dB
10
5
5
10
20
30
MONO
RLRLRLR
2345678
dB
10
5
5
10
20
30
ASSIGNASSIGNASSIGNASSIGNASSIGNASSIGNASSIGN
MONO
L+R
MIXMIXMIX
dB
10
5
5
10
20
30
MONO
L+R
dB
10
5
5
10
20
30
MONO
L+R
L+R
dB
10
5
5
10
20
30
MONO
L+R
dB
10
5
5
10
20
30
cussed below, allows you to assign submix buses
within your L/R mix.
MONO L & R
The MONO L & R switch (4) functions ONLY
when you have first depressed the L MIX or R
MIX. If you’ve pushed L MIX or R MIX, pushing
MONO L & R will assign the bus to both channels
of the Left and Right Mix buses, instead of just the
Left, or just the Right. This is also for submixing,
but allows you to put your submix in the center
rather than on either side.
(Those of you with patch
cords have probably realized
you can patch the bus into a
channel and do even more
fun things, but we’ll talk
about that later.)
SOLO
The SOLO button (5) solos the output of the bus
fader. When any SOLO button is pressed, the SOLO
LED lights.
This is a pretty trick SOLO, too. If you have not
pushed the MONO L & R switch, the SOLO sends the
odd-numbered tracks to the left speaker and the
even-numbered tracks to the right, whether or not
the associated L MIX or R MIX is engaged. But if you
have pressed MONO L & R,
the SOLO circuit is smart
enough to send the bus to
both speakers and put the
stereo image in the middle.
You will be the envy of your
neighborhood.
L/R MIX FADER
The L/R MIX fader (6) is
a stereo fader located at the
far right of the console. The
fader controls the level of
the L/R MIX bus, with precise dB markings and a
unity gain point marked on
the panel. This fader, like
the bus faders, is located in
the circuit after the L/R insert jack but before the final
line amplifier.
MONO
L+R
dB
10
5
UUUUUUUUU
5
10
20
30
TALKBACK
MIC
LEFT/RIGHT
MIX
dB
10
5
5
10
20
30
dB
10
5
U
5
10
20
30
40
50
80808080808080808080
40
50
OO
40
50
OO
OO
40
50
40
50
OO
40
50
OO
40
50
OO
40
50
OO
OO
40
50
OO
10
40
50
OO
METERING
Bus Meters 1-8
Directly above each bus fader is a peak-reading
meter displaying the bus output level. Zero (0) on
the meter references a level of +4dBu (1.23 volts
RMS) at the output jack.
Note: If the –10dBV switches are engaged at the
Subgroup output jacks, then zero (0) on the meter
references a level of –10dBV at those outputs.
Note: When any SOLO switch is engaged, the
SUBMASTER meters will be extinguished in order to divert your attention to the SOLO/MAIN
meters (discussed below).
MAIN OR SOLO LEVEL Meters
The MAIN OR SOLO LEVEL meters display the
L/R Main Mix levels and are similar to the bus
meters, with these exceptions:
• If a SOLO button is depressed, the meters
display the output of the soloed
signals; if not, the meters show the
level of the signal selected by the
MONITOR SOURCE switches. In
other words, you are always metering what you’re listening to.
IMPORTANT:
When the console
is in SOLO mode,
zero (0) on the
SOLO/MAIN
meters references the actual
internal operating level, or 0dBu
(.775v). If you have just one signal in
the main L/R path and you SOLO it,
the meter level will jump up 4dB.
Don’t be alarmed. If you’re mixing on
the L/R buses, that’s what you’ll
meter. If you’re checking a tape
playback, that’s what you’ll meter.
When the meters are following the
monitors (not in SOLO), zero (0) on
the meter references a level of
+4dBu (1.23 volts RMS) at the main
L/R outputs, just like the submaster
meters.
Note: The solo levels displayed on
the meters are PRE-solo level,
thus giving you an accurate
showing of the total level of the
soloed signals.This is also the way
to set initial console levels. See the
discussion of the SOLO function,
earlier in this section.
• Additional red LEDs per side at
the top of the meter show output
clipping at +28dBu balanced,
1
2
3
4
U
OO
+15
LEVEL
ASSIGN TO
L/R MIX
MASTER
MIX B / MONITOR
+22dBu unbalanced. (You don’t want these
to ever go on. If they do, try pulling down the
L/R master fader a little.)
AUX SENDS
The six auxiliary send outputs each have a
master level control. Like any level control, turning the knob turns the volume up or down.
However, the gain of the AUX Sends has been
optimized at the unity (center detent) setting
and should not need adjustment.
The output of each bus is available at its AUX
Send Out jack in the jack panel above. Additionally, AUX Sends 3 & 4 and AUX Sends 5 & 6 are
fed as stereo pairs to the two PHONES SOURCE
switching matrices, for headphone cueing
purposes.
U
SOLO
OO
+15
U
SOLO
OO
+15
LEVELLEVEL
U
SOLO
OO
+15
U
SOLO
OO
+15
SOLOSOLO
AUX SENDS
OOOOOO
PHONES
LEVEL
SOLO
PHONES 1
+
10
7
4
2
0
2
4
7
10
20
30
40
–
LR
U
5
SOLO
OO
+15
U
6
SOLO
OO
+15
LEVELLEVEL
MONITOR
MIX-B
AUX SEND
3/4
AUX SEND
5/6
EXTERNAL
PHONES 2
+
+
10
10
7
7
4
4
2
2
0
0
2
2
4
4
7
7
10
10
20
20
30
30
40
40
–
–
LR
PHONES
LEVEL
SOLO
12345678
U
1
OO
+20
U
2
OO
+20
U
3
OO
+20
U
4
OO
+20
LEVEL
MONITOR
MIX-B
AUX SEND
CNTRL RM
3/4
AUX SEND
5/6
EXTERNAL
SOURCESOURCE
MONITOR
+
+
10
10
7
7
4
4
2
2
0
0
2
2
4
4
7
7
10
10
20
20
30
30
40
40
–
–
LR
LR
LR
BALANC E
SOLO
SOLO
OO
STUDIO
O
OO
1-2
SOLO
1-2
SOLO
PHONES2L/R MIX
PHONES
1
ASSIGN
PHONES1PHONES2L/R MIX
ASSIGN
STEREO AUX RETURNS
L/R MIX
MIX-B
2-TK
EXTERNAL
MONO
SOURCE
+
+
10
10
7
7
4
4
2
2
0
0
2
2
4
4
7
7
10
10
20
20
30
30
40
40
–
–
LR
3-45-67-8
3-4
U
U
OO
+15
OO
+15
LEVELLEVELMIX-B
RUDE
SOLO LITE
OPERATING
LEVEL
INDICATOR
AND
SOLO
169 101112131415
241718192021222 3
ASSIGN
ASSIGN
5
6
5-6
OO
OO
LEVEL
L/R MIX
7-8
L/R MIX
U
+20
U
+20
AUX SEND 1
AUX SEND 2
TAPE SUB
MASTERS
PHONES
STUDIO
TALKBACK
+
22
10
7
4
2
0
2
4
7
10
20
30
40
–
LR
MAIN
OR SOLO LEVEL
LAYOUT
AND
FUNCTION
SOLO
SOLO
&
11
LAYOUT
AND
FUNCTION
AUX SOLO
The SOLO button next to each level control
(7) solos that send and allows you to check the
send level in the main meters. There is a solo
LED (8) in the Send section, to help you locate
what the heck you soloed.
Note: The six AUX Sends are each mono signals, and they are soloed in mono. If you are
using a stereo pair of sends for headphone cue,
use the SOLO button in the PHONES 1 or 2 areas to check the sends in stereo.
STEREO AUX RETURNS
The AUX Returns (9) provide 12 additional
inputs to the console for return from effects and reverb devices. The returns have switch matrices to
allow easy assignment to headphones or mix buses.
When any return is soloed, the solo LED in the lower
left-hand corner of the Return area lights.
For extra flexibility, the AUX Returns have been
designed with an extremely wide range of available
gain, offering as much as 15dB boost over unity.
The return jacks are wired to provide both stereo
and mono operation. See AUX Returns under JACK
PANEL later in this section for details.
Returns 1 & 2
AUX Returns 1 & 2 (10) each have a stereo SOLO
switch, a stereo LEVEL control, a BALANCE control
and a bank of ASSIGN switches.
ASSIGN (1 & 2)
AUX Returns 1 & 2 are assigned in stereo pairs
(Return 1, L & R; Return 2, L & R) to the L / R MIX
buses or to odd-even pairs of the 8 submix buses
(11). If you would like an effects return to accompany its dry signal on the multitrack (wet tracks),
these are the returns to use.
Returns 3 & 4
AUX Returns 3 & 4 (12) each have a stereo SOLO
switch, a stereo LEVEL control and a smaller bank of
ASSIGN switches.
ASSIGN (3 & 4)
Returns 3 & 4 are assigned in stereo pairs (Return
3, L & R; Return 4, L & R) to the L / R MIX buses or
to the PHONES 1 and PHONES 2 buses via respective banks of buttons for each return(13). If you
want additional effects returns preset in the headphone mixes, these are the returns to use.
POWER
U
1
SOLO
OO
+15
U
2
SOLO
OO
+15
LEVELLEVEL
U
3
SOLO
OO
+15
U
4
SOLO
OO
+15
SOLOSOLO
U
OO
+15
LEVEL
ASSIGN TO
L/R MIX
MASTER
MIX B / MONITOR
AUX SENDS
OOOOOO
PHONES
LEVEL
SOLO
PHONES 1
5
6
U
OO
U
OO
LEVELLEVEL
MONITOR
MIX-B
AUX SEND
3/4
AUX SEND
5/6
EXTERNAL
SOLO
+15
SOLO
+15
PHONES
LEVEL
PHONES 2
SOLO
1
2
3
4
U
OO
U
OO
U
OO
U
OO
LEVEL
MONITOR
MIX-B
AUX SEND
3/4
AUX SEND
5/6
EXTERNAL
SOURCESOURCE
Returns 5 & 6
AUX Returns 5 & 6 (14)
each have a stereo SOLO switch
and a stereo LEVEL control. Returns 5 & 6 are permanently
LR
LR
SOLO
SOLO
OO
STUDIO
O
OO
SOLO
SOLO
PHONES2L/R MIX
PHONES
1
PHONES1PHONES2L/R MIX
STEREO AUX RETURNS
L/R MIX
MIX-B
2-TK
EXTERNAL
MONO
SOURCE
+20
+20
BAL ANCE
+20
+20
CNTRL RM
MONITOR
ASSIGN
ASSIGN
1-2
OO
OO
LEVELLEVELMIX-B
RUDE
SOLO LITE
OPERATING
LEVEL
INDICATOR
AND
SOLO
3-45-67-8
ASSIGN
5-6
3-4
ASSIGN
5
6
LEVEL
U
U
+15
+15
U
OO
+20
U
OO
+20
TALKBACK
L/R MIX
7-8
L/R MIX
SOLO
SOLO
AUX SEND 1
AUX SEND 2
TAPE SUB
MASTERS
PHONES
&
STUDIO
+
1-2
assigned to the L/R MIX bus.
All returns are useful in a mixdown situation, as they are all
assignable to the L /R mix.
MIX-B / MONITOR
The MIX-B / MONITOR section (15) is quite straightforward. It offers a stereo level
control for the MIX-B output,
and an ASSIGN: MIX-B TO
L /R MIX switch, which can
add the MIX-B bus signal to the
main L /R Mix. This essentially
doubles the inputs available for
mixdown. Avoid this pitfall: If
you are monitoring the L/ R
mix in the control room and
have the MIX-B to the L / R mix
assigned, do not also select
MIX-B in the monitor source
switch matrix. If you do, MIX-B
will sound twice as loud in the
control room as it is in the L/ R
mix!
12
PHONES
The PHONES 1 (16) and PHONES 2 (17) sec-
tions are identical. Each
contains a stereo level control
for the headphones outputs, a
stereo SOLO switch, and five
pushbuttons to select from the
following signal sources: MONITOR, MIX-B, AUX
SENDS 3 & 4, AUX SENDS 5 & 6, and EXTERNAL.
You can select any combination of sources.
• The MIX-B, AUX SENDS 3 & 4 and AUX SENDS
5 & 6 switches are connected directly from the
outputs of their respective circuits.
• MONITOR takes the signal from after the
MONITOR selection switches described below,
and therefore carries the same signal that is
applied to the control room monitors. (The
PHONES section is not affected by the CNTL RM
level control or the MONO switch in the MONITOR section, though.)
• The EXTERNAL switch is connected directly
from the L and R EXTERNAL INPUTS in the jack
panel above. External is an independent cue
channel for click tracks, etc. Its signal DOES NOT
appear at any of the channels or buses.
Note: If MONITOR is selected as a PHONES
source and the solo button in the PHONES section is
depressed, nothing will happen except that the Solo
LEDs will light up. That’s because Solo is disabled
under these conditions to prevent a feedback loop
and its associated anguish.
Note: If nothing is selected, signal may still feed
the PHONES from AUX Return 3 & 4, via that
section’s ASSIGN TO PHONES switches.
MONITOR
The control room monitors and the studio
playback monitors are both controlled from the
MONITOR section of the console (18). There is
a stereo level control for the control room and
another for the studio.
Note: Fully clockwise equals unity gain.
A bank of switches selects the
stereo sources available to the
speakers from L/R Mix, MIX-B,
Tape and External. You can
select any combination of
signal sources.
The L/R MIX and MIX-B switches are connected from the outputs of the L/R and MIX-B
buses. The TAPE and EXTERNAL switches are
connected from the 2-TRACK INPUTS and the
EXTERNAL INPUTS, respectively, on the jack
panel above.
The MONO switch sums the left and right
channels together to allow you to check your mix
in monaural. This affects only the control room
monitor speakers, the studio monitor speakers,
and the L/R meters (although the meters are not
monoed in solo mode.)
SOLO
The Solo section (19) contains the master
level control for the stereo Solo mix. Set at the
center detent, it will match the level of the soloed
signals to the same signals unsoloed. This section
also has the most obnoxious solo light allowed under international trade and safety regulations. We
hope it gets your attention. The monitor switch in
the phones section must be pushed in (selected)
or the solo bus will not feed the phones. (By the
way, if your console has two little tiny Death’s Heads
above your RUDE SOLO LITE, you are very lucky.
Only one in 10,000 Mackie consoles has what we call
“Grim Greg” on it, and if you send in the top panel of
your console with proof of purchase, we will ship
postpaid to your door the bivalve pride of the Northwest, a Quilcene-smoked Geoduck filet, with our
compliments!)
TALKBACK
The talkback section has four momentary
pushbutton switches, which assign talkback to
any combination of AUX Send 1, AUX Send 2,
TAPE SUBGRPS (L/R MIX and the 8 SUBMASTERS) and PHONES/STUDIO. Try setting the
talkback level at the center detent for starters. It
can be tweaked up or down to your liking.
Note: When talkback is engaged, only the control room outputs are padded by 20dB to avoid
feedback, yet still allow the engineer to hear the
musicians. The studio output is not padded. In
situations where either the control room level is
set way up, or there is a speaker pointing at the
console, there may still be feedback. To prevent
this, turn down the talkback level, the control
room level, or change the angle of the control
room speakers.
The Talkback Microphone is located just above
the L/R MIX fader. This ain’t no Neumann, so
don’t attempt vocals through it (we wanted it to
sound gritty and generally talkback-esque). Application of chewing gum to this orifice will degrade
performance further to simulate really beat-up
AM radio production studios.
LAYOUT
AND
FUNCTION
13
PHANTOM
POWER
CHANNEL
24
MIC/LINE
LINE
BAL-
UNBAL
DIRECT
OUT
INSERT
TIP = OUT
RING = IN
JACK PANELS (INPUT STRIP &
MASTER OUTPUT)
All of the inputs, outputs and insert points are
located on the jack panels on the top and the
rear panels of the mixer. An external patchbay is
not required, although it does make life easier.
Let’s start by listing what is NOT on the
FRONT jack panel:
IN
• The console outputs to the multitrack tape
recorder (the Submaster/Tape outputs)
• The console inputs from the multitrack tape
recorder
• The balanced main L/R (XLR connector)
outputs (on the rear panel)
All other connections are made at the top of
the front panel, either above the channel Input
Strips or above the Output Panel.
INPUT STRIP
Each channel input strip has its inputs and
outputs located directly above the strip. The
connections are detailed next.
PHANTOM POWER
Microphone phantom power (+48 VDC) is applied to the channel strips in groups of eight. The
phantom on/off switch for channels 1-8 is located
above channel 8; the switch for 9-16 above channel 16, and so on. It has a “ramping” function,
which means it gradually ramps from 0 to 48V
when you turn it on, and ramps back down when
you turn it off. This helps protect your microphones.
We suggest that before plug-
ging or unplugging mics, you
turn off the PHANTOM power.
Give it about a minute to settle
while you get a Diet YooHoo or call your stockbroker. Then connect or disconnect the
microphone(s) and turn PHANTOM power back on.
CAUTION: After switching PHANTOM Power
on or off, wait 1 minute before changing any mic/
line switch settings in that eight-channel block.
Another safe alternative is to turn both TRIM
and Channel Faders down for that bank of eight
channels before switching.
Mic In
The channel microphone input (1) is a standard 3-pin female mic connector (call me
Cannon or call me XLR, just don’t call me late
for dinner). Pin one is ground, pin two is signal
high (+), pin three is signal low (–), as per the
(finally) agreed-upon international standard.
Note: Don’t use these XLR’s for line level
signals — see “Line In”.
Line In
The channel Line Input (2) is a TRS (tipring-sleeve) balanced 1/4" phone jack, with
ground wired to the sleeve, signal high (+) to
the tip and signal low (–) to the ring. Nominal
input level is +4dBu, with a wide range of levels
accommodated by adjustment of the TRIM control. These jacks also accommodate TS
(tip-sleeve) unbalanced 1/4" phone plugs. See
Appendix A: Connections for more information.
Direct Out
The channel Direct Out (3) is a nominal
+4dBu unbalanced TS 1/4" phone jack, connected to the output of the channel line
amplifier post-EQ/post-fader/post-mute. The output signal of each channel strip is always
available at the Direct Out jack. Using the Direct
Out does not interrupt the normal signal flow
through the channel.
Channel Insert
The channel Insert jack (4) allows you to insert external processing equipment (such as a
compressor, gate, you name it) into the main signal path of the input channel strip. The insert
point is after the FLIP switch (which also means
that it is after the MIC/LINE or TAPE IN preamplifiers) but before the LO CUT filter, EQ and
fader MUTE switch. The TRS jack is configured
for the Tip (send), Ring (return) and Sleeve
(signal ground). See Appendix A for more details
on using external processing and channel inserts.
Let there be light (sockets)
Additionally, one or two BNC connectors (depending upon the number of input channels on
the console) are provided above the input strips
for gooseneck lamps. The BNCs are wired with
the center post at +12 VDC. Mackie doesn’t offer
lamps, but most dealers do. We recommend
LittleLite lamps #12G or #12G-HI (a high-intensity
version).
14
OUTPUT PANEL
The input and output jacks that correspond to most of the functions in the
Output Panel are, logically, located in
the jack panel directly above the Output
Panel. The 8•Bus outputs to tape (and
the inputs from tape) are located on the
rear panel.
Submaster Inserts
At the top of the panel are the eight
Submaster Insert jacks (1). These
patch points allow you to insert a serial
processing device (such as a compressor or an equalizer) into any of the
8•Bus submaster circuits. See Appendix A for more details on using external
processing.
The insert point is after the summing amplifier,
but before the fader. Like the Channel Insert
points, the connectors are 1/4" TRS jacks, wired
unbalanced with the output or send signal on the
tip, the input or return signal on the ring, and the
sleeve common or ground.
Note: These inserts can be used as pre-fader
direct outs, using an unbalanced (TS) 1/4” plug in
these two ways:
• Plugs are inserted just to the FIRST click.
There is no interruption of the signal; OR
• Plugs are inserted all the way in to the
SECOND click.This interrupts the signal
and routes it ONLY to the device you’re
sending to.
AUX Sends
The six AUX Sends (2) appear as six 1/4" jacks in
a row, just underneath the Sub Inserts.
AUX Sends 1 and 2 are balanced TRS outputs,
wired tip to high (+), ring to low (–), and sleeve to
ground. AUX Sends 1 and 2 are designed so that
1/4" unbalanced TS phone plugs can also be used,
with no loss of level. AUX Sends 3 through 6 are unbalanced, with the tip high (+) and ring and sleeve
tied together as ground. Nominal level is +4dBu.
1
1
(MONO)
L
R
(MONO)(MONO)
L
TIP = OUT RING = IN
2
2
(MONO)
L
1234 56
R
2-TRACK
INPUT
3
3
(MONO)
L
R
AUX RETURN
R
L
4
AUX SEND
4
(MONO)
L
R
EXTERNAL
INPUT
SUBMASTER INSERT
5
5
(MONO)
L
R
R
L
(MONO)
STUDIO
OUTPUT
6
6
L
R
7
L
L
L
R
L
12
PHONES
right return inputs and end up centered in your stereo image. When a jack is plugged into the Right
input of the return, this mono feature is disabled: the
left input is fed to the left return, and the right input
is fed to the right return.
Main Inserts
On the upper right of the panel are two Main Insert jacks (4). These patch points allow you to insert
a serial processing device, such as a compressor or
an equalizer, into the Main L/R Mix. See Section 4 for
more details on using external processing.
The Main Insert’s insert point (try saying that fast
three times backward) is after the summing amplifier but before the master fader. Like the Submaster
Insert points, the connectors are 1/4" TRS jacks,
wired unbalanced with the output or send signal on
the tip, the input or return signal on the ring, and the
sleeve common or ground.
Control Room Output
The two Control Room Output jacks (5) carry the
signal for the Control Room speakers. They are 1/4"
unbalanced, wired tip high, ring and sleeve ground.
Nominal level is +4dBu. This is where you connect
your control room monitor amplifier inputs.
8
MAIN
INSERT
CNTRL
RM OUTPUT
MAIN MIX
MIX-B
OUTPUT
R
R
R
R
AUX Returns
The AUX Returns (3) are stereo, with a L&R input for each return channel. Inputs are 1/4"
unbalanced jacks, nominal level (+4dBu).
One special feature: The Left input jack to each
return is also labeled “MONO.” If you have only one
return signal, plugging it into the “MONO/L” jack only
will cause it to be connected to both the left and
15
TIP = OUT RING = IN
1
2
3
SUBMASTER INSERT
4
5
6
7
8
LAYOUT
AND
FUNCTION
1
(MONO)
L
R
(MONO)(MONO)
L
2
(MONO)
L
1234 56
R
2-TRACK
INPUT
R
3
(MONO)
R
L
L
AUX SEND
4
(MONO)
L
R
AUX RETURN
EXTERNAL
INPUT
R
Main Mix
The Main Mix jacks (6) on the top panel are 1/4"
TRS unbalanced, with tip high, and ring and sleeve
tied to ground. The nominal level is +4dBu. These
two jacks carry the L/R Main Mix, for connection to
your master 2-Track recorder’s inputs, for instance.
The same Main L/R Mix is also available, fully balanced, at the two XLR connectors on the back panel.
MIX-B Output
The MIX-B jacks (7) are 1/4" TRS unbalanced,
with tip high, ring and sleeve tied together as ground,
nominal level +4dBu. These jacks make the MIX-B
signal available for external patching.
5
(MONO)
R
L
L
6
(MONO)
R
STUDIO
OUTPUT
L
L
L
L
R
12
PHONES
MAIN
INSERT
CNTRL
RM OUTPUT
MAIN MIX
L
MIX-B
OUTPUT
R
R
R
R
Studio Output
The two Studio Output jacks (9) carry the signal
for the Studio speakers. They are 1/4" unbalanced,
wired tip high, ring and sleeve ground, nominal level
+4dBu. This is where you connect the inputs to your
studio monitor amplifier.
Alternatively, the Studio Output jacks can be
wired to a second Control Room amplifier and set of
speakers. Then, to switch between the two sets, turn
the CNTRL-RM level control fully down and turn up
the STUDIO level control — or vice versa. This concept is very handy during mixdown. It won’t work
very well if you plan to use any of the talkback
switches, as you would during tracking/overdubbing.
Phones
The two Phones jacks (8) are 1/4" TRS stereo,
with tip connected to left, ring to right and sleeve to
ground. The final output of Phones 1 and Phones 2
appear here. These jacks may be connected to external power amplifiers for headphone distribution, or
you may plug your phones directly into the jacks.
There is plenty of level. In fact, you should turn the
PHONES level down before you plug your phones in,
and then bring the level up to where you want it.
16
2-Track Input and External Input
The 2-Track Input (10) and External Input (11)
are 1/4" TRS unbalanced jacks, with tip wired to high
and ring and sleeve tied together to ground. These
inputs offer you the ability to listen to two mono or
stereo sources directly, without patching through input channels. Either input can be connected to any
stereo source you’d like to listen to. Usually, you will
have the 2-Track Input connected to the output of
your 2-Track master recorder, to check the mix.
The inputs are directly wired to the “2-TK” and
“EXTERNAL” source selection switches in the
Phones 1 and 2 and MONITOR sections of the
Output Panel. These are +4 dBu inputs.
R
21
U
19
17
15
1311975
OPERATING
LEVEL CH. 17-24
IN –10dBV
OUT +4dBu
22
20
18
REAR PANEL
CONNECTIONS
The connections to and from your multitrack recorder are on the Rear Panel of the 8•Bus Series.
There are 24 or 32 Tape Return jacks (depending on
the model) and 24 Submaster/Tape Out jacks.
Tape Returns
The Tape Return jacks (1) are 1/4" TRS balanced,
with tip wired to high (+), ring to low (–) and sleeve
to ground. These jacks are also wired to accommodate 1/4" TS unbalanced connections. Each jack is
connected to the Tape input on the corresponding
channel, and is selected by the FLIP switch on that
channel.
Connect the outputs of your multitrack recorder
to the Tape In jacks. Note that they are grouped in
sets of eight: 1-8, 9-16 and17-24.
Tape return OPERATING LEVEL
Nominal level for the Tape Return jacks is
switched to either +4dBu (switch out) or -10dBV
(switch in) in groups of 8 channels. If you aren’t sure
of your multitrack recorder’s operating output level,
check the specifications section of the recorder’s
owner’s manual.
Submaster/Tape Outputs
The Tape Out jacks (2) are 1/4" TRS balanced,
with tip wired to high, ring to low and sleeve to
ground. These jacks are also wired to accommodate
1/4" TS unbalanced connections. The Submaster
Outputs of the console appear on these jacks in the
following pattern:
Console Bus 1:Submaster 1, 9 and 17
Console Bus 2:Submaster 2, 10 and 18
Console Bus 3:Submaster 3, 11 and 19
Console Bus 4:Submaster 4, 12 and 20
Console Bus 5:Submaster 5, 13 and 21
Console Bus 6:Submaster 6, 14 and 22
Console Bus 7:Submaster 7, 15 and 23
Console Bus 8:Submaster 8, 16 and 24
Connect the inputs of your multitrack recorder to
the Tape Output jacks.
Why are there 24 submaster output jacks on
an 8-submaster mixer? This is called “triple-bussing.” When you send a signal to Submaster 1
output, for instance, it will appear at Submaster
Outputs #1, #9 and #17. Now, whichever tracks
on your multitrack are in RECORD mode will accept the signal, while the tracks in SAFE mode
won’t. That way, you can feed a 24-track deck
without having to constantly re-patch. Connect
the Submaster/Tape Outputs to the corresponding inputs on your multitrack, using only
Submasters 1 through 8 for an 8-track deck, or
1-16 for a 16-track deck.
Submaster/Tape Output
OPERATING LEVEL
Nominal level for the Submaster jacks is
switched to either +4dBu (switch out) or
–10dBV (switch in) in groups of 4 channels (3).
If you aren’t sure of your multitrack recorder’s
operating input level, check the specifications
section of the recorder’s owner’s manual.
TAPE RETU
LEFTRIGHT
+28dBu MAX OUT
MAIN BAL OUTPUTS
87156
16
5
IN –10dBV
OUT +4dBu
OPERATING
14
SUBMASTER / TAPE OUTPUTS
LEVEL
13
+4dBu BALANCED / –10dBV UNBALANCED
4
3
2
1
IN –10dBV
OUT +4dBu
OPERATING
LEVEL
12
11
9
10
1718201921222324
17
+18V
–18V
+48V
+12V
+5V
EXPANDER
PORT
USE MACKIE 8•BUS
EXPANDER CABLE
ONLY! KEEP COVERED
LEFTRIGHT
DC POWER IN
THIS CONNECTION FOR MACKIE
8•BUS POWER SUPPLY ONLY !
MAIN BALANCED OUTPUTS
Along with the unbalanced 1/4” TS Main Mix
jacks on the front panel, balanced Main XLR
Outputs (4) are also provided, wired pin 2 hot,
pin 3 cold, pin 1 shield. Maximum output is
+28dBu.
EXPANDER PORT
The Expander Port (5) connection is provided for the 24•E Expander console, which has
been discontinued as of this printing.
DC POWER IN
This is where the funny plug that looks like a
Supersoaker squirtgun nozzle fits (6). Your 8•Bus
console should ONLY be powered by the appropriate
Mackie 8•Bus Power Supply.
This concludes our guided tour of the 8•Bus
console’s controls and connections. Now it’s time for
hands-on use!
+28dBu MAX OUT
MAIN BAL OUTPUTS
18
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