American Audio Mixer QFX Pro Manual

24. CHANNEL BASS CONTROL - This knob is used to adjust the low frequency levels of a channel 
allowing for a maximum bass gain of 1
2 dB or maximum signal decrease of -30dB. 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 to a channel signal.
25.  FEATHER FADER PLUS CROSSFADER -  This fader is used to blend the output signals of chan-
nels one and two...

©American Audio®   -   www.americanaudio.us   -   Q-FXPRO Instruction Manual Page 12
34.  GND (GROUND TERMINAL) -  Be sure to connect turntable ground leads to either or both of 
the  two  available  ground  terminals.  This  will  reduce  the  humming  and  popping  noises  associated 
with magnetic phono cartridges.
35 .  MICROPHONE 3 CONNECTOR  - This jack is used to a connect a microphone to the mixer. Con
-
nect you microphone via this 1/4 inch (6.3mm) jack. This microphone will be controlled...

©American Audio®   -   www.americanaudio.us   -   Q-FXPRO Instruction Manual Page 13
40.    CHANNEL  1:  LINE  1  INPUT  JACKS  -   DO  NOT  CONNECT  TURNTABLES  TO  THESE  JACKS! 
CD players, Tape Decks and other line level instruments may be connected to these jacks. The red 
colored RCA jack represents the right channel input and the white represents the left channel input. 
Input volume will be controlled by channel three
  fader . The channel SOURCE SELECTOR SWITCH 
(2)  must be in the "Line...

sound  system.  The  output  level  for  these  jacks  will  be  controlled  by  the ZONE   VOLUME  KNOB 
(22).  These RCA jacks send a low current, unbalanced output signal. These jacks should only be 
used for shorter cable runs  (under 15 feet) to signal processors or looping to another mixer.
 
48 .    RCA  MASTER  OUTPUTS  -  The  Master  Output  includes  a  pair
 XLR  BALANCED  JACKS  (52) 
as well as a pair of RC A Unbalanced Jacks. The RCA jacks send a low current unbalanced output 
signal....

©American Audio®   -   www.americanaudio.us   -   Q-FXPRO Instruction Manual Page 15
  Q-FXPRO                          DSP  EFFECT  CONTROLS  AND  FUNCTIONS
58575655
55.    EFFECTS  INDICATOR  - When  any  of  the  eight  effects  are  in  use,  these  indicators  will  glow  to 
match any of the eight effects that may be functioning.
56 .  DEPTH FEEDBACK DISPLAY -  The Depth Feedback digital display will indicate the parameter 
ratio percentage.  Turning the DEPTH FEEDBACK KNOB (12) in a clockwise...

©American Audio®   -   www.americanaudio.us   -   Q-FXPRO Instruction Manual Page 16
  Q-FXPRO                                            TYPICAL  MIXER  SET-UP
This image details a typical DJ Set Up consisting of a microphone, turn-
tables, CD players, and a tape deck.
Note: Turntables can only be connected to the PHONO LEVEL RCA 
JACKS. Be sure the LINE LEVEL SELECTOR SWITCHES are in the 
"PHONO" position when using turntables.  
0023 
000700080006000500070001000200040003...

©American Audio®   -   www.americanaudio.us   -   Q-FXPRO Instruction Manual Page 17
  Q-FXPRO                                                      TYPICAL  MIXER  SET-UP
Speaker Cables
Balanced XLR male to XLR female Cables
C A S S E T T E   D E C K
American Audio V4001™
Typical Balanced Output Set-up
This  image  details  a  typical  stereo  output  layout.  Note  the  use  of  the  Balanced  XLR  Jacks  on  both 
the mixer and the amplifier.  Always use the balanced output jacks whenever possible. The...

©American Audio®   -   www.americanaudio.us   -   Q-FXPRO Instruction Manual Page 18
Due to fog residue, smoke, and dust, cleaning the mixer should be carried out periodically to residue 
build up.  
1.   Use normal glass cleaner and a soft cloth to wipe down the outside casing.
2.   Use a cleaner specially designed for electronics to spray in and around the knobs and switch.  
  This will reduce small particle built up that can effect the proper operation of the mixer. 
3.   Cleaning should be carried...

©American Audio®   -   www.americanaudio.us   -   Q-FXPRO Instruction Manual Page 19
  Q-FXPRO                                TROUBLESHOOTING
Trouble Shooting: Listed below are common problems you may encounter, and solutions.
There is no power to the unit:
Be sure you have connected the power cord to a correct wall outlet.
There is little or no sound:
1.   Check the input selector switch. Make sure it is set to the device that is currently playing.
2.   Check to see if the connection cables are...

©American Audio®   -   www.americanaudio.us   -   Q-FXPRO Instruction Manual Page 20
1-YEAR LIMITED WARRANTY
A.  American Audio
® hereby warrants, to the original purchaser, American Audio® products to be free 
of manufacturing defects in material and workmanship for a period of 1 Year (365 days) from the date 
of purchase. This warranty shall be valid only if the product is purchased within the United States of 
America, including possessions and territories. It is the owner’s responsibility to...