American Audio Mixer MX1400 DSP User Manual

							
User Guide 
and Reference Manual
    3/07
MX-1400 DSP
4295 Charter Street
Los Angeles Ca. 90058
www.AmericanAudio.us 
						

							
©American Audio®   -   www.americanaudio.us   -   MX-1400 DSP Instruction Manual Page 2
MAIN FEATURES.........................................................................................................................\
...........2
ELECTRICAL  PRECAUTIONS.............................................................\
...................................................3
SAFETY  PRECAUTIONS.............................................................\
...........................................................5
INTRODUCTION....................................................................................................................................6
SET-UP  PRECAUTIONS.............................................................\
............................................................6
UNPAC kIN g.........................................................................................................................................7
qUICk  START........................................................................................................................................7
CONTROLS AND FUNCTIONS
  FRONT  PANEL...........................................................................................................\
.................8
 REAR  PANEL............................................................................................................................13
 LCD  SCREEN/DSP  EFFECTS.................................................................\
..................................18                                                                         \
                                       
TYPICAL  MIXER  SET-UP........................................................................\
..............................................19
CLEANIN g......................................................................................................................21
CROSSFADER  REPLACEMENT...........................................................................................................21
TROU bLES hOOTIN g......................................................................................................................22
WARRANTY.........................................................................................................................................23
SPECIFICATIONS.....................................................................................................................24
   MX-1400  DSP                                                       CONTENTS
  MX-1400  DSP                                                              Mai N  F EaTURES
•  Feather Fader Plus for q-Start Control
•  3 Phono, 4 Line, 4 Auxiliaries & 3 Mic Inputs 
•    balanced outputs
•   high quality Feather Fader™ for smooth, clean   
 cross fades (replaceable)
•   bass, Mid, and Treble for each channel
•   bass, Mid, and Treble for Mics 1 & 2
•  Mono/Stereo Switch on Master
•    high level headphone output 
•  Cue mixing 
•   Split cue for headphones
•   Turntable ground connectors located on the rear   
 panel
•  Adjustable Crossfader Curve 
•   On/Off switch for channel assign 
•    gain control for each channel
•  115v/230v selectable 
•   q-Start Compatible (for use with American    
    Audio CD Players with Fader “q” Start)
•   Master Level Indicator 
•   balanced XLR Output 
•    DSP Effects - Trans, Manual & Auto Filter,     
 
    Auto Pan, Pitch Shifter, Flanger, Reverb, and   
     Echo
•    Digital bPM Display
•   Master Output Trim Control  
						

							
©American Audio®   -   www.americanaudio.us   -   MX-1400 DSP Instruction Manual Page 3
NOTE:  This  product  satisfies  FCC 
regulations  when  shielded  cables 
and  connectors  are  used  to  con-
nect  the  unit  to  other  equipment. 
To  prevent  electromagnetic  inter-
ference  with  electrical  appliances 
such as radios and televisions, use 
shielded  cables  and  connectors 
for connections.
WARNINg: TO PREVENT FIRE OR ELECTRIC 
ShOCk hAZARD,  DO  NOT  EXPOSE  ThIS 
UNIT TO RAIN, LIqUIDS, OR MOISTURE 
CAUTION:  TO  PREVENT  ELECTRIC  ShOCk 
DO  NOT  USE  T hIS  (POLARIZED)  PLU g 
WITh  AN  EXTENSION  CORD,  RECEPTACLE, 
OR  OThER  TYPE  OF  ELECTRICAL  OUTLET 
UNLESS  ThE  WIDE  bLADES  CAN  bE 
CAREFULLY  INSERTED  INTO  A  MATChINg 
WIDE SLOT.
ATTENTION:  POUR  PREVENIR  LES  ChOCS 
ELECTRI qUES  NE  PAS  UTILISER  CETTE 
FIC hE  POLARISEE  AVEC  UN  PROLON-
g ATEUR,  UNE  PRISE  DE  COURANT  OU 
UNE  AUTRE  SORTIE  DE  COURANT,  SAUF 
SI  LES  LAMES  PEUVENT  ETRE  INSEREES  A 
FOND SANS EN LAISSER AUCUNE PARTIE A 
DECOUVERT.
   MX-1400  DSP                                              ELECTRiCaL SaFETY PRECaUTiONS
VOLTAgE SELECTOR  SWITCh
LINE VOLTAgE SELECTION 
• The desired voltage may be set with the   
 VOLTAgE SELECTOR switch on the rear   
 panel (using a flat head screw driver).
• Do not force the VOLTAgE SELECTOR   
 switch as this may cause damage
• If the VOLTAgE SELECTOR switch does   
 not move smoothly, please contact a quali- 
 fied service technician.
The  serial  and  model  number  for  this  unit  is 
located  on  the  rear  panel.  Please  write  down 
the  numbers  here  and  retain  for  future  refer-
ence. 
Model No._____________________________
Serial No._____________________________
Purchase Notes:
Date of Purchase_______________________
Dealer Name__________________________
Dealer Address_________________________
_____________________________________
_____________________________________
Dealer Phone__________________________ 
						

							
ELECTRICAL PRECAUTIONS
RISK OF ELECTRIC SHOCKDO NOT OPEN
CAUTION
The exclamation point within an equilateral triangle isintended to alert the user to the presence of importantoperating and maintenance (servicing) instructions inthe literature accompanying the appliance.
The lightning flash with arrowhead symbol, within anequilateral triangle, is intended to alert the user to thepresence of uninsulated dangerous voltage within theproducts enclosure that may be of sufficient magnitudeto constitute a risk of electric shock to persons.
REaD iNSTRUCTiONS — All the safety and operatinginstructions should be read before the product isoperated.RETaiN iNSTRUCTiONS — The safety and operatinginstructions should be retained for future reference.hEED waRNiNGS — All warnings on the product andin the operating instructions should be adhered to.FOLLOw iNSTRUCTiONS — All operating and useinstructions should be followed.CLEaNiNG — The product should be cleaned only witha polishing cloth or a soft dry cloth. Never clean withfurniture wax, benzine, insecticides or other volatileliquids since they may corrode the cabinet.aTTaChMENTS — Do not use attachments notrecommended by the product manufacturer as theymay cause hazards.waTER aND MOiSTURE — Do not use this productnear water — for example, near a bathtub, washbowl, kitchen sink, or laundry tub; in a wet basement;or near a swimming pool; and the like.aCCESSORiES — Do not place this product on anunstable cart, stand, tripod, bracket, or table. Theproduct may fall, causing serious injury to a child oradult, and serious damage to the product. Use onlywith a cart, stand, tripod, bracket, or tablerecommended by the manufacturer, or sold withthe product. Any mounting of the product shouldfollow the manufacturer’s instructions, and shoulduse a mounting accessory recommended by themanufacturer.CaRT — A product and cart combination should bemoved with care. Quick stops, excessive force, anduneven surfaces may cause the product and cartcombination to overturn.
vENTiLaTiON — Slots and openings in the cabinet areprovided for ventilation and to ensure reliableoperation of the product and to protect it fromoverheating, and these openings must not beblocked or covered. The openings should never beblocked by placing the product on a bed, sofa, rug,or other similar surface. This product should not beplaced in a built-in installation such as a bookcase orrack unless proper ventilation is provided or themanufacturer’s instructions have been adhered to.POwER SOURCES — This product should be operatedonly from the type of power source indicated on themarking label. If you are not sure of the type ofpower supply to your home, consult your productdealer or local power company.LOCaTiON – The appliance should be installed in astable location.NONUSE PERiODS – The power cord of the applianceshould be unplugged from the outlet when left un-used for a long period of time.
GROUNDiNG OR POLaRiZaTiON•If this product is equipped with a polarized alternatingcurrent line plug (a plug having one blade wider thanthe other), it will fit into the outlet only one way. Thisis a safety feature. If you are unable to insert the plugfully into the outlet, try reversing the plug. If the plugshould still fail to fit, contact your electrician toreplace your obsolete outlet. Do not defeat thesafety purpose of the polarized plug.•If this product is equipped with a three-wiregrounding type plug, a plug having a third (grounding)pin, it will only fit into a grounding type power outlet.This is a safety feature. If you are unable to insert theplug into the outlet, contact your electrician toreplace your obsolete outlet. Do not defeat thesafety purpose of the grounding type plug.POwER-CORD PROTECTiON - Power-supply cordsshould be routed so that they are not likely to bewalked on or pinched by items placed upon oragainst them, paying particular attention to cords atplugs, convenience receptacles, and the point wherethey exit from the product.OUTDOOR aNTENNa GROUNDiNG — If an outsideantenna or cable system is connected to the product,be sure the antenna or cable system is grounded soas to provide some protection against voltage surgesand built-up static charges. Article 810 of the NationalElectrical Code, ANSI/NFPA 70, provides informationwith regard to proper grounding of the mast andsupporting structure, grounding of the lead-in wireto an antenna discharge unit, size of groundingconductors, location of antenna-discharge unit,c o n n e c t i o n t o g r o u n d i n g e l e c t r o d e s , a n drequirements for the grounding electrode. See FigureA.LiGhTNiNG — For added protection for this productduring a lightning storm, or when it is left unattendedand unused for long periods of time, unplug it fromthe wall outlet and disconnect the antenna or cablesystem. This will prevent damage to the productdue to lightning and power-line surges.POwER LiNES — An outside antenna system shouldnot be located in the vicinity of overhead power linesor other electric light or power circuits, or where itcan fall into such power lines or circuits. Wheninstalling an outside antenna system, extreme careshould be taken to keep from touching such powerlines or circuits as contact with them might be fatal.OvERLOaDiNG — Do not overload wall outlets,extension cords, or integral convenience receptaclesas this can result in a risk of fire or electric shock.
ObJECT aND LiQUiD ENTRY - Never push objects ofany kind into this product through openings as theymay touch dangerous voltage points or short-outparts that could result in a fire or electric shock.Never spill liquid of any kind on the product.SERviCiNG — Do not attempt to service this productyourself as opening or removing covers may exposeyou to dangerous voltage or other hazards. Refer allservicing to qualified service personnel.DaMaGE REQUiRiNG SERviCE  - Unplug this productfrom the wall outlet and refer servicing to qualifiedservice personnel under the following conditions:• When the power-supply cord or plug is damaged.•If liquid has been spilled, or objects have fallen intothe product.•If the product has been exposed to rain or water.•If the product does not operate normally by followingthe operating instructions. Adjust only those controlsthat are covered by the operating instructions as animproper adjustment of other controls may result indamage and will often require extensive work by aqualified technician to restore the product to itsnormal operation.•If the product has been dropped or damaged in anyway.• When the product exhibits a distinct change inperformance — this indicates a need for service.REPLaCEMENT PaRTS -- When replacement partsare required, be sure the service technician has usedreplacement parts specified by the manufacturer orhave the same characteristics as the original part.Unauthorized substitutions may result in fire, electricshock, or other hazards.SaFETY ChECk - Upon completion of any service orrepairs to this product, ask the service technician toperform safety checks to determine that the productis in proper operating condition.waLL OR CEiLiNG MOUNTiNG — The product shouldnot be mounted to a wall or ceiling.hEaT — The product should be situated away from heatsources such as radiators, heat registers, stoves, orother products (including amplifiers) that produceheat.
IMPORTANT SAFETY INSTRUCTIONS
ANTENNALEAD INWIRE
GROUNDCLAMP
ANTENNADISCHARGE UNIT(NEC SECTION 810-20)
GROUNDING CONDUCTORS(NEC SECTION 810-21)
GROUND CLAMPS
POWER SERVICE GROUNDINGELECTRODE SYSTEM(NEC ART 250, PART H)
ELECTRICSERVICEEQUIPMENT
Fig. A
NEC — NATIONAL ELECTRICAL CODE
C A U T I O N : T O R E D U C E T H E R I S K O F E L E C T R I C SHOCK, DO NOT REMOVE THE COVER (OR BACK). T H E R E A R E N O U S E R S E R V I C E A B L E P A R T S INSIDE  REFER SERVICE TO YOUR AUTHORIZED AMERICAN AUDIO® SERVICE TECHNICIAN.
   MX-1400  DSP                                             ELECTRiCaL SaFETY PRECaUTiONS
©American Audio®   -   www.americanaudio.us   -   MX-1400 DSP Instruction Manual Page 4 
						

							
©American Audio®   -   www.americanaudio.us   -   MX-1400 DSP Instruction Manual Page 5
1. For  adult  use  only  -  keep  out  of  the  reach 
of   children.
2. Water and Moisture - The player should not 
be  used  near  water  -  for  example,  near  a  bath 
tub,  kitchen  sink,  laundry  tub,  in  a  wet base-
ment  or  near  a  swimming  pool,  etc. Do  not 
spill  water  or  other  liquids  in  to  or  on  to  your 
mixer.
3. Ventilation  -  The  Mixer  should  be  situated 
so  that  its  location  or  position  does  not  inter-
fere  with  its  proper  ventilation.  For example, 
the  Mixer  should  not  be  situated  on  a  bed, 
sofa, rug, or similar surface that may block the 
ventilation  openings;  or,  placed  in  a  built-in 
installation, such as a bookcase or cabinet that 
may impede the flow of air through the ventila-
tion openings. 
4.  heat  -  The  Mixer  should  be  situated  away 
from heat sources such as radiators, heat reg-
isters,  stoves,  or  other  appliances  (including 
amplifiers) that produce heat.
5. Power Sources - The Mixer should be con-
nected  to  a  power  supply  (wall  outlet) only  of 
the type described in the operating instructions 
or as marked on the Mixer.
6. Servicing  -The  user  should  not  attempt  to 
service the Mixer beyond that described in the 
operating  instructions. There  are  no  user  ser-
viceable parts inside. All other servicing should 
be  referred  to  qualified  service  personnel.  The 
Player  should  be  serviced  by  qualified  service 
personnel when:
 A.  The power-supply cord or the plug has   
  been damaged.
 b. Objects have fallen, or liquid has been    
  spilled into the Mixer.
 C. The Mixer has been exposed to rain   
  or water.
     D. The Mixer does not appear to operate   
  normally or exhibits a marked change  
  in performance.
7. Never  disassemble  or  modify  your  unit  in 
any way, doing so will void your manufactures 
warranty.
   MX-1400  DSP                                               SaFETY PRECaUTiONS
8. Never plug this mixer in to a dimmer pack.
9. Do not let insecticides, benzene, or thinner 
come in contact with the surface of the  
unit.
10. This unit is intended for indoor use only, use 
of this product outdoors voids all warranties.
11. Always  mount  this  unit  in  safe  and  stable 
matter.
12. Disconnect from main power before making 
any type of connection.
13. Cleaning - The  mixer should be cleaned 
only as recommended by the manufacturer. 
Use a soft cloth to wipe down the outside of the 
unit. For stubborn stains moisten a soft cloth 
with  glass cleaner or other mild detergent to 
wipe away any stains. Use a soft cloth to wipe 
any residual cleaner. Never use volatile clean-
ers  such as benzene, solvent, or thinner to clean 
your unit, these cleaners will damage the units 
surface. 
14.  handle the power supply cord carefully. Do 
not  damage  or  deform;  it  may  cause  electric 
shock  or  malfunction  when  used.  hold  plug 
attachment  when  removing  from  wall  outlet. 
Do not pull on the cord.
15.  To  avoid  electric  shock,  do  not  open  the 
top cover when the unit is plugged in. If prob-
lems occur with the unit, call American Audio® 
customer support.
16.  Do not place metal objects or spill any liq-
uids    inside  or  on  the  mixer.  Electric  shock  or 
malfunction may occur.
17.  Power  Cord  Protection  -  Power  supply 
cords  should  be  routed  so  that  they  are  not 
likely  to  be  walked  on  or  pinched  by  items 
placed upon or against them, paying particular 
attention to cords at plugs, convenience recep-
tacles,  and  the  point  where  they  exit  from  the 
mixer. Route your power cord out of the way of 
foot traffic.
18. Always  have  the  front  gain  controls  set  to 
their lowest level during initial power-up to pre-
vent speaker damage. 
						

							
Introductions: Congratulations  and  thank  you  for  purchasing  the  American  Audio®  MX-1400  DSP 
mixer. This mixer is a representation of American Audio’s continuing commitment to produce the best 
and  highest  quality  audio  products  possible  at  an  affordable  price.  Please  read  and  understand  this 
manual completely before attempting to operate your new mixer. Please carefully read and understand 
the  instructions  in  this  manual  thoroughly  before  attempting  to  operate  this  unit.  These  instructions 
contain important safety information regarding the use and maintenance of this unit. Take special care 
to follow all warning symbols and labels both on the unit and printed in this manual. Also, Please keep 
this manual with the unit, for future reference.
Customer Support: 
American  Audio®  provides  a  toll  free  customer  support  line,  to  provide  set  up  help  and  answer  any 
question should you encounter problems during your initial set up or operation. You may also visit us 
on the web at www.americanaudio.us for any comments or suggestions. Service hours are Monday 
through Friday 9:00 a.m. to 5:30 p.m. Pacific Standard Time.
 Voice:    (800) 322-6337
 Fax:    (323) 582-2941
 E-mail:   [email protected]
To purchase parts online visit http://parts.americandj.com
Caution!  There  are  no  user  serviceable  parts  inside  this  mixer.  Do  not  attempt  any  repairs  yourself, 
without being instructed to do so by an authorized American Audio service technician. Doing so will 
void your manufactures warranty. In the unlikely event your mixer may require service, please contact 
American Audio® customer support.
Do not discard the packing carton in the trash. Please recycle when ever possible.
  MX-1400  DSP                                                                                 iNTRODUCT iON
©American Audio®   -   www.americanaudio.us   -   MX-1400 DSP Instruction Manual Page 6
  MX-1400  DSP                               SET -UP  P REC aUT iONS
Please be sure to make any connections before plugging the mixer in to an electrical outlet. All fader 
and volume controls should be set to zero or minimum position, before the mixer is switched on. If the 
mixer has been exposed to drastic temperature fluctuation (e.g. after transportation), do not switch on 
the mixer immediately. The arising condensation of water might damage your device. Leave the device 
switched off until it has reached room temperature.
Operating Determinations:
•  When installing this mixer, please make sure that the device is not exposed or will not be 
 exposed to extreme heat, moisture or dust!
• Do not operate the mixer in extremely hot (more than 30°/100°F) or extremely cold (less than 
 5°C/40°F) surroundings. 
•  keep the unit out of direct sunlight and away from heaters.
• Operate the mixer only after becoming familiar with its functions. Do no\
t permit operation by 
 persons not qualified for operating the mixer. Most damages are the result of unprofessional 
 operation!
• Do not attempt to operate this mixer if the power cord has been frayed or damaged. 
• Disconnect from main power before making any type of connection.
• Do not attempt to operate this mixer, if it becomes damaged in any way.
• Never operate this mixer when it’s covers are removed.
• To reduce the risk of electrical shock or fire, do not expose this mixer to rain or moisture.
• This mixer is intended for indoor use only, use of this product outdoors voids all warranties.
• During long periods of non-use, disconnect the mixer’s main power. 
						

							
Quick start: American Audio® would like to thank you for your purchase of this great audio product. 
For those of you that are too impatient to read the entire user manual we have compiled these quick 
start instructions. We hope that you will at least read through these instructions to familiarize yourself 
with  the  basics  of  this  mixer.  The  MX-1400  DSP  is  part  of  American  Audio’s  continuing  evolution  in 
audio technology. This unit has been built and designed to meet the needs of a typical DJ. We have 
attempted to provide you with the most reliable product on the market by using only components con-
structed of the finest material.
Master LeveL - Use this level to control your main volume output. Try never to send an output of 
more  than  +4db  to  your  system.  Signal  at  levels  higher  than  this  will  start  to  distort  and  may  cause 
damage to your system and speakers. Remember that a distorted signal from you mixer will only be 
multiplied throughout your system.
channe L Gain Leve L - The channel gain levels are not to be used as volume controls. Never use 
the  channel  trim  to  set  the  output  volume.  These  controls  are  used  to  aid  in  distortion  control.  Use 
these control to preset your signal level before the crossfader. With your channel faders in the maxi-
mum position, use the channel trim level to set an average output level of about +4d b on you master 
level meter.
headphones  -  To  avoid  damaging  your  headphones  always  be  sure  the  headphone  volume  level 
(26) is set to minimum before plugging them in. To avoid sever hearing damage, never put the head-
phone on without making sure the headphone level is turned down.
Main  Mic  -    The  main  mic  connector  uses  a  combo  plug  that  allows  you  to  connect  either  a  1/4” 
unbalanced jack or by a standard 3-pin XLR balanced connector. The main mic also has an indepen-
dent volume control. When feedback occurs when using the mic, try lowering the level this may reduce 
the feedback. Always leave the mic level to it’s minimum level when not in use. note: We recommend 
that you use a 500-600ohm microphone for the best sound quality.
phono /au X Line Leve L se Lector  sW itch - This switch is used to change the selected input 
from phono to line and vice versa. The switch selectors are on the rear panel.
  MX-1400  DSP                                       QUiC k  ST aRT   iNSTRUCT iONS
©American Audio®   -   www.americanaudio.us   -   MX-1400 DSP Instruction Manual Page 7
  MX-1400  DSP                                                                 UNPaCki NG
Every MX-1400 DSP has been thoroughly tested and has been shipped in perfect operating condition. 
Carefully check the shipping carton for damage that may have occurred during shipping. If the carton 
appears to be damaged, carefully inspect your mixer for any damage and be sure all equipment neces-
sary to operate the mixer has arrived intact. In the event damage has been found or parts are missing, 
please contact our toll free customer support number for further instructions. Please do not return the 
mixer to your dealer without first contacting customer support. 
						

							
  MX-1400  DSP                                  CONTROLS  aND  FUNCT iONS
©American Audio®   -   www.americanaudio.us   -   MX-1400 DSP Instruction Manual Page 8
1.   Microphone 1 -  This combo jack will accept a standard 1/4 plug or XLR 3-pin balanced male 
plug. The volume output level for this microphone will be controlled by its own respective Channel 
fader  (30). note:  We  recommend  that  you  use  a  500-600ohm  microphone  for  the  best  sound 
quality.
2.   Microphone 2 -  This combo jack will accept a standard 1/4 plug or XLR 3-pin balanced male 
plug. The volume output level for this microphone will be controlled by its own respective Channel 
fader  (29). note:  We  recommend  that  you  use  a  500-600ohm  microphone  for  the  best  sound 
quality.
3.   channe L voLuMe LeveL  indicators - The LED indicators that run along each channels Eq 
section are used to measure incoming signal levels. Use these indicator to visually maintain an average 
signal output of +4db. A consistent average output level of +4db will produce a clean output signal.
4. channeL  trebLe  controL -  This  knob  is  used  to  adjust  the  treble  levels  of  a  channel 
FRONT PANEL
26
14
12
13
1
9
8
7
6542
10
24212019
17
16
222325
3
18
11
15
35
34
33
32
31
30
29
27
28
36 
						

							
allowing  for  a  maximum  treble  gain  of  12dB  or  maximum  decrease  of  -∞dB.  Turning  the  knob  in 
a  counter-clockwise  direction  will  decrease  the  amount  of  treble  applied  to  a  channel  signal,  turn-
ing  the  knob  in  a  clockwise  direction  will  increase  the  amount  of  treble  applied  to  a  channel  signal.
    channeL  MidranGe controL - This knob is used to adjust the midrange levels of a channel 
allowing for a maximum midrange gain of 12dB or maximum decrease of -∞dB. Turning the knob in a 
counter-clockwise direction will decrease the amount of midrange applied to a channel signal, turning 
the  knob  in  a  clockwise  direction  will  increase  the  amount  of  midrange  applied  to  a  channel  signal.
     channeL  bass  controL - This  knob  is  used  to  adjust  the  low  frequency  levels  of  a  channel 
allowing for a maximum bass gain of 12dB or maximum signal decrease of -∞dB. Turning the knob in 
a counter-clockwise direction will decrease the amount of bass applied to a channel signal, turning the 
knob in a clockwise direction will increase the amount of bass applied t\
o a channel signal.
5. source  seLector  knob - These knobs are used to select the input source assigned to each 
channel.  Each  channel  may  only  be  assigned  one  input  source  at  a  time.  This  knob  must  be  in  the 
“phono” position for turntable operation. 
6. au X 4  input  - Only CD players, Tape Decks and other line level instruments may be connected 
to  these  jacks.  Never  connect  a  turntable  to  these  input  jacks,  this  may  seriously  damage 
your mixer! The red colored RCA jack represents the right channel input and the white represents 
the left channel input. Input volume will be controlled by the channel four fader.
7.  Main  poWer sWitch - This is the main power ON/OFF button.  before main power is applied, 
be  sure  you  have  made  all  connections  to  the  mixer.  Also  be  sure  your  amplifier(s)  is(are)  tuned  off. 
Remember to avoid damaging pops to the speakers, the mixer is turned on first and turned off last.
8.  Master output baLance  controL - This knob is used to control the pan, adjust how much 
of the signal is sent to the left and right output level. For true stereo imaging, maintain the knob in the 
12 o’ clock position. 
9.  Master  voLu M e  L eve L indicators  - The  dual  MASTER  LEVEL  LED  indicators  are  used  to 
detail  the  master  fader  output  level.  The  meters  will  detail  the  output  level  of  both  the  left  and  right 
channels.
10.  booth  channe L assi Gn  knob  - This  knob  is  used  to  select  the  channel  that  you  want  the 
booth signal to be directed to. Connect your monitor system to the  booth XLR sockets located on the 
rear panel. 
11.   booth L eveL - This knob is used to adjusts the monitor volume output level. Turn the knob in a 
clockwise direction to increase the monitor volume.
12.  cue  seLector  button  - These  buttons  are  used  to  activate  a  channels  “CUE”  mode.  The 
red CUE LED will glow when a channels cue mode is activated. The Cue function sends a channels 
incoming signal to the headphones. The cue level is adjusted by the Cue level Knob (26). be sure 
the Cue mixing Knob (27) is set to the “CUE” position to hear a selected channel source.
13. Master output Mono/stereo sWitch - This switches the Master Output signal between 
stereo and mono.
14.  Master  voLuMe controL  - This  slider  is  used  to  control  the  master  output  level  (main 
volume).  To  avoid  distorted  output  try  to  maintain  an  average  output  signal  level  no  greater  than  +4 
db. (see Channel  gain 2) To avoid speaker damage that may be caused by excessive volume, be sure 
this slider is always set to zero (completely down) before turning the\
 unit on.
  MX-1400  DSP                     CONTROLS  aND  FUNCT iONS  cont.
©American Audio®   -   www.americanaudio.us   -   MX-1400 DSP Instruction Manual Page 9 
						

							
©American Audio®   -   www.americanaudio.us   -   MX-1400 DSP Instruction Manual Page 10
15.  dsp eFFects (di Gita L si Gna L processinG ) paneL -
 eFF ects se Lector knob - This knob is used to select a desired effect. The effects have    
  two adjustable parameters, Time Array and Depth Feedback. Effects are listed below; 
 echo - When the EChO effect is selected it will add an echo to your output signal.  
 auto pan - When the PAN effect is selected the effect will automatically pan the output from    
 the left channel to the right channel. 
 FLanG er - When the FLANgER effect is selected it distorts the output signal and creates an    
  effect similar to frequencies phasing in and out of each other.  
 ManuaL & auto FiL ter - When the FILTER effect is selected it will tweak the original sound   
 to add different tonal definition.  
  reverb - When the REVERb effect is selected it simulates the sound you would get as if you   
 were playing music in big empty hall.  All the reflections you would get with the music bouncing   
 off the walls is digitally simulated in this effect.
  trans -  When the TRANS effect is selected it will simulate a real-time mixer transformer   
 effect.  
 pitch shi Ft - When the PITCh ShIFT effect is selected it can increase or decrease the play-   
  ing speed. Using the bEAT SYNC button you can change the pitch percentange between 
 - 100%, -50%, 0%, +50%, and +100%. 
 input as siGn - This knob is used to select a channel in which to apply effects.
  ti Me arra Y knob ( para Meter X) - This knob is used to adjust the parameter time value.
  depth Feedback knob (paraMeter Y) - This knob is used to adjust the parameter ratio   
  value (effect level).
16.  tap  button - This button is used to override and manually set a tracks  bPM. Occasionally the 
built-in bPM meter may not function as desired. This button allows you to override the internal beat 
clock  and  manually  set  a  tracks  bPMs.  To  manually  set  the bPMs;  tap  this  button  a  few  times  to  a 
tracks heavy down beat, the unit will automatically calculate your tapping and translate it into a tracks 
bPM.  The bPM  readout  is  then  displayed  in  the  LCD  (22).  To  return  to  the  automatic  bPM  counter, 
press and hold down the taP button (16) for at least 2 seconds and then release.
17.    FX on/oFF  button  - This  button  functions  as  an  effect  Master  on/off  button  and  is  used  to 
activate and deactivate the effects.
18.  beat se Lect  button s/beat disp La Y - This button is used to set the delay time of an effect 
to the beat of music. The display indicates the beat ratio that has been set for an effect. The beat ratios 
are 1/4, 1/2, 3/4, 1/1, 2/1, and 4/1. It also changes the TIME PARAMETER according to the measured  
b PM of the effector.   
19.  FX cue button - This is used to select the effects to be monitored with headphones.
20.  Q-start  on/oFF sWitch - This function works in conjunction with a compatible American DJ® 
or  American  Audio®  “q”  Start  CD  player.  When  used  with  a  compatible  CD  player,  you  can  use  the 
crossfader to start and stop a CD Player with the slide of the mixer’s Crossfader (21). The ON/OFF 
“q"  START  SWITCh  activates  the  FADER  “q"  START  feature.  When  in  the  ON  position,  the  FADER 
“q" START automatically returns the CD player to the preset CUE POINT.
 For  example;  Assuming  you  have  two  compatible  American  Audio™  CD  players  or  a
  MX-1400  DSP                      CONTROLS  aND  FUNCT iONS  cont.