Gemini MM-4000, Operation Manual

INTRODUCTION:

4

FEATURES:

CONNECTIONS:

1

6

7

CONTROLS:

8

10

11

12

Congratulations on your purchase of Gemini 

MM-4000

19” 4 channel

stereo mixer with effects. This-state-of-the-art mixer features the latest
technological advances and is backed by a 1 year warranty, excluding the
cross fader. The cross fader is backed by a separate 90 day warranty.
Prior to use we suggest that you carefully read all the instructions.

- 4U 19" rack mounted audio EFX mixer
- 4 stereo channels
- 6 line and 2 phono RCA inputs
- 1 balanced XLR master microphone input 
- 4 unbalanced ¼” (6.35mm jack) Mic channel inputs
- Master, zone & record RCA outputs
- Balanced XLR master output
- 3 band rotary line EQ control per channel 
- 8 effect DSP module w/16 presets

POWER INLET

The 

MM-4000 

comes with a standard three prong power cord. The

power section of the 

MM-4000

is fused protected. Replace fuses

with only 

250v 500mAL 

fuses. For foriegn voltages you can switch

the voltage selector from 

115v to 230V

BALANCED OUTPUTS

The 

MM-4000 

has balanced

XLR 

outputs controlled by the master

output rotary

The 

MASTER RCA OUTPUT

connects the mixer to your main amplifier using standard audio 
cables with 

RCA

-type connectors.

The 

RECORD RCA OUTPUT

The 

RECORD 

output jacks can be used to connect the mixer to the

record input of your recording unit, thus enabling you to record your
mix with 

RCA

cables.

ZONE OUTPUT

The 

ZONE OUTPUT 

is the same as the 

MASTER

output but has its

own seperate volume control, you can use the 

ZONE OUTPUT

to

control a seperate set of speakers for example in the 

DJ

booth or

seperate bar/outdoor area.

2

3

4

CHANNEL INPUTS

Now you may plug the 

RCA’s

from your playable medium into each

input to be connected to their respective 

CHANNELS

(

CH

).

The 

MM-4000

has eight (

8

) inputs, (

2)

of which are 

PHONO

inputs

and are pre-amped for turntable use. There is also a grounding
screw for both 

PHONO

inputs located between channel (

1

) and

channel (

2

) on the rear panel (see below).

NOTE: CONNECTING A LINE LEVEL DEVICE TO A PH INPUT MAY CAUSE THAT

MIXER CHANNEL TO OVERLOAD AND OR DISTORT.

GROUNDING SCREW

When using (a) turntable(s), you will need to ground the 

RCA

cable(s) by screwing in the grounding fork(s) to the 

GROUNDING

SCREW

located on the rear panel of the

MM-4000

mixer.

Attach a 

PHONO

(Turntable) ground line to the silver 

GROUND

THUMB SCREW 

that is situated at the bottom middle of the rear

panel.

MIC (MICROPHONE) INPUTS

The 

MM-4000

has 

5 MIC

(

MICROPHONE

) inputs 

1

main mic input 

located on the top panel, which is controlled by its own volume 
rotary, and four auxiliary 

MIC

inputs located on the back panel.

The 

AUX MIC

inputs are controlled by thier corresponding channels

fader, when that channels selector switch (

12

) is set to the 

MIC

position.

HEADPHONE OUTPUT

The 

HEADPHONE OUTPUT

located at the front bottom right hand

corner of the 

MM-4000

will accept any headphone with a standard

1/4” connector and or adapter and will allow you to 

CUE

your music

program before you play it, you can adjust the volume and PGM mix
of the 

HEADPHONE

(see 

CONTROLS

).

Then when all of your connections have been made turn on the
mixer by pressing the POWER SWITCH.

MICROPHONE VOLUME

Allows you to adjust the volume of the microphone signal for 

MIC

input (

1

) which is located above this volume rotary (

see above

) .

MICROPHONE EQ 

and

TALKOVER SWITCH

The 

MICROPHONE EQ

Let’s you to control the low frequency and

the high frequency of the microphone signal.The 

TALKOVER

switch

allows you to quickly attenuate the main output so the microphone
can be heard over the main music program.

MIXER CHANNELS

(NOTE: ALL 4 CHANNELS HAVE THE SAME FEATURES)

CHANNEL INPUT SELECTOR

The 

CHANNEL INPUT SELECTOR

switches allow you to choose

which input will be controlled by that channels corresponding
volume 

FADER

.

For example on 

CHANNEL (1)

the

INPUT SELECTOR

allows you to

choose between 

PHONO 1,LINE 1 

and

MIC 2

, and also on 

CHANNEL (2)

you can switch between 

PHONO 2, LINE 2

and

MIC 3 

and on 

CHANNEL (3)

you can select either 

LINE 3,LINE 4

or

MIC 4

input, then on 

CHANNEL (4)

you can choose between

LINE 5

, 

LINE 6

and 

MIC 5

.

CHANNEL ROTARY GAIN

The 

CHANNEL ROTARY GAIN 

allows you to boost the signal of

each individual channel depending on how low or high its input 
level is.

9

MM-4000

5

13

PRECAUTIONS:

1. All instructions should be read before using this equipment.

2. To reduce the risk of electrical shock, do not open the unit.
Please refer all servicing needs to a 

Gemini

-qualified service

technician.

3. Do not expose this unit to direct sunlight or a heat source such
as a radiator or stove.

4. This unit should be cleaned only with a damp cloth. Avoid sol-
vents or other cleaning detergents.

5. When moving this equipment it should be placed in its original
carton and packaging. This will reduce the risk of damage during
transit.

6. DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE

.

7. DO NOT USE SPRAY CLEANERS OR LUBRICANTS ON
CONTROLS, SURFACES OR SWITCHES.

IN THE USA ~ IF YOU EXPERIENCE PROBLEMS WITH THIS UNIT CALL GEMINI CUSTOMER SERVICE AT:    

1 (732) 346-0061. DO NOT ATTEMPT TO RETURN THIS EQUIPMENT  TO YOUR DEALER.