OPERATORS MANUAL
MP 24x
DJ MIXER
QUICK START
Don't! Quick-starting an MP 24x is like trying to quick-start a 747. It's just not something you do. Trust us, you don’t
want to make mistakes with this sucker. So just this once—please—we highly recommend you read this entire manual:
front-to-back, every single page, every single word. It will familiarize you with the many intricacies of the MP 24x, not to
mention all the nooks and crannies.
Manual-1
FRONT PANEL DESCRIPTION
1. POWER “ON” indicator: This yellow LED illuminates anytime the MP 24x is connected to an appropriate power source
(see #28, Rear Panel).
2. SOURCE CONTROL selectors: These four position rotary switches provide Input selection between the various Phono
and Line Inputs for their respective mixing Channels.
3. Input channel faders: These faders control the relative Levels of each of the four Input mixing Channels.
4. Channel CUE selectors: Engaging any single or combination of CUE pushbuttons sends any program present at the
respective Channel’s SOURCE CONTROL selector to the Headphone Cue section. The yellow LEDs adjacent to each CUE
select button illuminate when the switch is engaged.
5. CROSSFADE ENGAGE switch: Engaging this switch activates the CROSSFADER and disables manual mixing capabilities. The adjacent green LED illuminates whenever the Crossfader is active.
6. Left-hand CROSSFADE ASSIGN switch: This four position rotary switch ASSIGNS the left side of the Crossfader to any
of the four Input Channels when the Crossfader is activated by its ENGAGE switch.
7. Right-hand CROSSFADE ASSIGN switch: This four position rotary switch ASSIGNS the right side of the Crossfader to
any of the four Input Channels when the Crossfader is activated by the ENGAGE switch.
8. ACTIVE CROSSFADER: This fader controls the Levels of any two Channels assigned to it by the left and right Crossfade
ASSIGN switches when the ENGAGE switch is activated. The entire Crossfader assembly is replaceable from the front
panel without disassembling the entire unit. See Service Information on page Schematic-1for instructions.
9. ENGAGE MIC switch: This pushbutton enables the Microphone Inputs to feed the Booth, Zone, and Main Outputs. The
adjacent red LED flashes whenever the ENGAGE MIC switch is down and locked. This switch also activates a “ducker”
circuit in the Booth Output.(See #15 Front Panel and #20 Rear Panel.)
10. MAIN MIC LEVEL control: This rotary control sets the Level of the balanced low impedance MAIN MIC Input.
11. AUX MIC LEVEL control: This rotary control sets the Level of the unbalanced high impedance AUX MIC Input, most
often used for wireless mics.
Manual-2
12. Microphone equalization controls: These three rotary controls adjust the frequency contour of both Microphone Inputs.
They have no effect on any other program material.
13. LOOP ENGAGE switch: This pushbutton controls the Switchable Effects Loop; pressing it to its down and locked
position routes the main signal through the processor attached to the SWITCHABLE LOOP connectors on the rear.(See #12
& #13, Rear Panel.)
14. MASTER LEVEL fader: This control determines the program and microphone Level at the Main Outputs. Unity gain is
approximately “4.5”
15. BOOTH LEVEL control: Controls the program and microphone Level at the Booth Outputs. Unity gain is approximately
“6.5”. This Output utilizes a “ducking” circuit that reduces the microphone Level when the MIC ENGAGE switch is
activated. (See #20, Rear Panel.)
16. ZONE LEVEL control: Controls the program and microphone Level of the Zone Outputs. Unity gain is approximately
“6.5”.
17. PROGRAM EQUALIZER controls: These four rotary controls are used to contour the frequency response of the
program at the Main, Booth and Zone Outputs. This is not designed to be the only equalizer in the system, this is intended
to provide EQ between varying program materials.
18. PROGRAM EQUALIZER ENGAGE switch: Engaging this switch enables the Program Equalizer to function. In the out
position, the Equalizer is bypassed.
19. HEADPHONE LEVEL CONTROL: Clockwise rotation of this rotary control increases the headphone drive level.
20. HEADPHONE PAN CONTROL: This rotary control serves two purposes; in the STEREO mode it changes the relative
levels of the Cue and Program mixed together in both earcups. In the MONO mode it changes the balance between the
Mono Cue in the left ear cup and the Mono Program in the right.
21. HEADPHONE CUE mode switch: In the up position, this switch feeds STEREO Program and Cue to both earcups, in the
down position the Headphone circuit provides MONO Cue to the left ear and MONO Program to the right.
22. HEADPHONE output jack: A tip-ring-sleeve stereo jack provides for the insertion of stereo headphones.
23. PEAK PROGRAM METER: This stereo LED bargraph provides a visual indication of program output voltage. The
calibration of the indication is user adjustable. (See #6, Rear Panel.)
FADER CARE
With heavy use in harsh environments, the faders may
need lubrication. Rane recommends spraying one or two
bursts of CaiLube MCL into the fader. Work the fader back
and forth a few times after spraying. This treatment extends
longevity and can make used faders as good as new.
Order CaiLube MCL® from:
CAIG Laboratories, Inc.
12200 Thatcher Ct.
REPLACING THE ACTIVE CROSSFADER
The Crossfader may be removed from the front of the
MP 24x without any disassembly of the unit itself, and may
be performed while the unit is operating with no interruption
of the audio signal.
1. Remove the two (2) outer screws attaching the crossfader
assembly to the front panel.
2. Firmly pull the Crossfader Assembly forward, unplugging
it from the connector on the bottom board.
3. Install the replacement assembly by reversing the above
instructions.
Poway, CA 92064
Phone 619-486-8399
Fax 619-486-8396
Web www.caig.com
Manual-3