Gemini PS-828EFX Operating Manual [en, de, es, fr]

12.5” 4 Channel Mixer With Effects

PS-828EFX

OPERATIONS MANUAL
MANUAL DE INSTRUCCIONES
MANUEL D’INSTRUCTIONS
BEDIENUNGSHANDBUCH

FOR ENGLISH READERS Page 2 ~ Page 6
PARA LECTORES EN ESPAÑOL Página 7~ Página 10
UTILISATEURS FRANCAIS Page 11 ~ Page 14
FÜR DEUTSCHE LESER Seite 15 ~ Seite 18

CAUTION: This product satisfies FCC regulations when shielded cables and connectors are used to connect the unit to other equipment. To prevent electromagnetic interfer-

ence with electric appliances such as radios and televisions, use shielded cables and connectors for connections.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the liter-

ature accompanying the appliance.
The lightening flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the prod-

uct’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

READ INSTRUCTIONS: All the safety and operating instructions should be read before the product is operated.
RETAIN INSTRUCTIONS: The safety and operating instructions should be retained for future reference.
HEED WARNINGS: All warnings on the product and in the operating instructions should be adhered to.
FOLLOW INSTRUCTIONS: All operating and use instructions should be followed.
CLEANING: The product should be cleaned only with a polishing cloth or a soft dry cloth. Never clean with furniture wax, benzine, insecticides or other volatile liquids since

they may corrode the cabinet.

ATTACHMENTS: Do not use attachments not recommended by the product manufacturer as they may cause hazards.
WATER AND MOISTURE: Do not use this product near water, for example, near a bathtub, wash bowl, kitchen sink, or laundry tub; in a wet basement; or near a swimming

pool; and the like.

ACCESSORIES: Do not place this product on an unstable cart, stand, tripod, bracket, or table. The product may fall, causing serious injury to a child or adult, and serious dam-

age to the product. Use only with a cart, stand, tripod, bracket, or table recommended by the manufacturer, or sold with the product. Any mounting of the product should fol­low the manufacturer’s instructions, and should use a mounting accessory recommended by the manufacturer.

CART: A product and cart combination should be moved with care. Quick stops, excessive force, and uneven surfaces may cause the product and cart combination to over-

turn. See Figure A.

VENTILATION: Slots and openings in the cabinet are provided for ventilation and to ensure reliable operation of the product and to protect it from overheating, and these open-

ings must not be blocked or covered. The openings should never be blocked by placing the product on a bed, sofa, rug, or other similar surface. This product should not be
placed in a built-in installation such as a bookcase or rack unless proper ventilation is provided or the manufacturer’s instructions have been adhered to.

POWER SOURCES: This product should be operated only from the type of power source indicated on the marking label. If you are not sure of the type of power supply to your

home, consult your product dealer or local power company.

LOCATION: The appliance should be installed in a stable location.
NON-USE PERIODS: The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time.
GROUNDING OR POLARIZATION:

• If this product is equipped with a polarized alternating current line plug (a plug having one blade wider than the other), it will fit into the out­let only one way. This is a safety feature. If you are unable to insert the plug fully into the outlet, try reversing the plug. If the plug should still
fail to fit, contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the polarized plug.

• If this product is equipped with a three-wire grounding 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 the plug into the outlet, contact your electrician to replace your obsolete out­let. Do not defeat the safety purpose of the grounding type plug.

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 par-

ticular attention to cords at plugs, convenience receptacles, and the point where they exit from the product.

OUTDOOR ANTENNA GROUNDING: If an outside antenna or cable system is connected to the product, be sure the antenna or cable system is grounded so as to provide

some protection against voltage surges and built-up static charges. Article 810 of the National Electrical Code, ANSI/NFPA 70, provides information with regard to proper
grounding of the mast and supporting structure, grounding of the lead-in wire to an antenna discharge unit, size of grounding conductors, location of antenna-discharge unit,
connection to grounding electrodes, and requirements for the grounding electrode. See Figure B.

LIGHTNING: For added protection for this product during a lightening storm, or when it is left unattended and unused for long periods of time, unplug it from the wall outlet and

disconnect the antenna or cable system. This will prevent damage to the product due to lightening and power-line surges.

POWER LINES: An outside antenna system should not be located in the vicinity of overhead power lines or other electric light or power circuits,

or where it can fall into such power lines or circuits. When installing an outside antenna system, extreme care should be taken to keep from
touching such power lines or circuits as contact with them might be fatal.

OVERLOADING: Do not overload wall outlets, extension cords, or integral convenience receptacles as this can result in a risk of fire or electric

shock.

OBJECT AND LIQUID ENTRY: Never push objects of any kind into this product through openings as they may touch dangerous voltage points

or short-out parts 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 product yourself as opening or removing covers may expose you to dangerous voltage or other haz-

ards. Refer all servicing to qualified service personnel.

DAMAGE REQUIRING SERVICE: Unplug this product from the wall outlet and refer servicing to qualified service personnel under the following conditions:

• When the power-supply cord or plug is damaged.

• If liquid has been spilled, or objects have fallen into the product.

• If the product has been exposed to rain or water.

• If the product does not operate normally by following the operating instructions. Adjust only those controls that are covered by the operating instructions as an improper
adjustment of other controls may result in damage and will often require extensive work by a qualified technician to restore th

e product to its normal operation.

• If the product has been dropped or damaged in any way.

• When the product exhibits a distinct change in performance, this indicates a need for service.

REPLACEMENT PARTS: When replacement parts are required, be sure the service technician has used replacement parts specified by the manufacturer or have the same

characteristics as the original part. Unauthorized substitutions may result in fire, electric shock, or other hazards.

SAFETY CHECK: Upon completion of any service or repairs to this product, ask the service technician to perform safety checks to determine that the product is in proper op-

erating condition.

WALL OR CEILING MOUNTING: The product should not be mounted to a wall or ceiling.
HEAT: The product should be situated away from heat sources such as radiators, heat registers, stoves, or other products (including amplifiers) that produce heat.

PLEASE READ BEFORE USING APPLIANCE

IMPORTANT WARNING AND SAFETY INSTRUCTIONS!

CAUTION

RISK OF ELECTRIC

SHOCK DO NOT

OPEN!

Fig. A

Fig. B

2

BACK

PS-828EFX

TOP

1

3

2

3

4

5

6

7

8

8

10

12

13

14

15

23

17

18

19

20

21

26

11

22

9

18

16

16

24

25

PANEL TRASERO
FACE ARRIERE
HINTEN

PANEL SUPERIOR
FACE SUPERIEURE
OBEN

-- SSAAMMEE FFEEAATTUURREESS OONN
EEVVEERRYY CCHHAANNNNEELL

-- LLAASS MMIISSMMAASS
CCAARRAACCTTEERRIISSTTIICCAASS
EENN CCAADDAA CCAANNAALL

-- MMÊÊMMEE
CCAARRAACCTTÉÉRRIISSTTIIQQUUEESS
OONN EEVVEERRYY CCAANNAALL

-- DDIIEESSEELLBBEENN
EEIIGGEENNSSCCHHAAFFTTEENN
AAUUFF JJEEDDEEMM KKAANNAALL

16

INTRODUCTION:

4

FEATURES:

CONNECTIONS:

1

6

7

CONTROLS:

8

10

11

12

Congratulations on your purchase of Gemini PS-828EFX 12.5” 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.

- 12.5” 4 Stereo channel mixer

- 5 line, 2 Phono inputs 2 microphone jacks 1/4” (6.35mm)

- 3 band rotary line EQ with cut feature & rotary gain channel control

- Separate Cue Switch for each channel

- Rotary cue volume, CUE/PGM rotary knob

- VU meter on each channel

- Talkover switch

- Removable face plate for user replaceable Rail Glide cross fader

- 3 effects with parameter control

Ensure that the POWER SWITCH
is in the OFF position prior to making any connections.

POWER SUPPLY
This unit comes with a POWER SUPPLY. Plug in to the rear panel
POWER SUPPLY socket before plugging it in to a proper power

source.

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.

BALANCED OUTPUTS

The PS-828EFX has balanced XLR outputs controlled by the master
output rotary.

2

3

4

5

The PS-828EFX has 2 PHONO and 5 LINE RCA INPUTS
each channel has two corresponding lines and can be chosen via the
channel line switches (see 12)
When switched to the PH position you may use any Turntable with a
magnetic cartridge, remember to connect your ground wire (see
GROUNDING SCREW) or there may be a system hum.

And when the switch is in the LN position you may connect any line
level device as described before (Mp3, CD, Tape etc).

NOTE: CONNECTING A LINE LEVEL DEVICE TO A PH INPUT MAY CAUSE
THAT MIXER CHANNEL TO OVERLOAD AND OR DISTORT.

Now you may plug the RCA’s from your playable medium into each
input to be connected to their respective CHANNELS (CH).

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 PS-828EFX 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) INPUT

The main MIC or Microphone input is located in middle of the back
panel of the PS-828EFX and will accept a standard 1/4” connector.
There is also an AUX MIC input located at the top left hand corner of
the front panel. You can control the gain of both together and even
set the low’s and the high’s for the MIC (See CONTROLS ).

HEADPHONE OUTPUT

The HEADPHONE OUTPUT located at the front bottom left hand
corner of the PS-828EFX 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.

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 CHANNEL
(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 and LINE 1 , on CHANNEL (2) the
INPUT SELECTOR SWITCH will let you choose between PHONO 2
and LINE 2 and on CHANNEL (3) you can choose between LINE 3
and the LINE 4 input, and on CHANNEL (4) you can choose
between LINE 5 and MIC 2.

9

PS-828EFX

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 sol­vents 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 [phone]. DO NOT ATTEMPT TO RETURN THIS EQUIPMENT TO YOUR DEALER.

CONTROLS: (CONTINUED)

18

20

21

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

3 BAND EQUALIZER

The 3 BAND EQUALIZER adjust the tone of each CHANNEL by giv­ing you a choice 3 frequencies (BANDS) to adjust , from LOW,
MIDRANGE (MID) and HIGH’s ,you can use the adjustment knobs to
higher or lower the 3 separate frequencies till the sound of the music
program is appropriate for your listening environment.

CHANNEL VOLUME FADER
After you have chosen which input you will use with the INPUT
SELECTOR the corresponding CHANNEL FADER will allow you to
adjust the volume for that particular CHANNEL.

CROSSFADER ASSIGNMENT/ADJUSTMENT SWITCHES

The fader assignment push button allows you to assign which two
channel faders will be controlled by the CROSSFADER in the UP po­sition the CROSSFADER will fade between channels (1) and (2), in
the down or pushed in position the CROSSFADER will fade between
channels (3) and (4). The CURVE ADJUSTMENT selector lets you
choose between two fader CURVE settings, positioning the switch to
the right will give you a gradual CROSSFADE and positioning the
switch to the left will give you a quick CROSSFADE.

CROSS FADER

The CROSS FADER allows you to mix evenly from one source to an­other. On the PS-828EFX The CROSSFADER is assignable between
either channels (1) and (2) or channels (3) and (4) depending on the
position of the fader assignment push button (see above).
The CROSS FADER on the PS-828EFX is also removable and if the
need arises can be replaced.The RG-45 (RAILGLIDE™)
DUAL-RAIL CROSS FADER, which has internal dual stainless steel
rails that allow the slider to ride smoothly and accurately from end to
end can be purchased from your local GEMINI dealer.

NOTE: WHEN USING THE CROSS FADER LIGHTLY GLIDE THE
FADER BACK AND FORTH. PRESSING DOWN ON THE
CONTROLS CAN BEND CONTACTS AND CAUSE A LOSS OF SOUND.

CHANNEL AND MASTER VU METERS

The PS-828EFX has a VU METER on each channel that allows you to
monitor the decibel levels of its input, you also have a master output

VU METER that lets you monitor the decibel levels of the LEFT and
RIGHT MASTER output.

CUE MASTER SWITCH

The VU METER has two display modes, in CUE mode it will display
the level of the channel you are cueing, in MASTER mode it displays
the main MASTER output.

MASTER VOLUME ROTARY
The MASTER VOLUME ROTARY knob adjust the volume of the
MAIN output.

CUE/PGM ROTARY
The CUE/PGM ROTARY determines the mix between the chosen
CHANNEL CUE SELECTOR and the MAIN OUTPUT mix.

CUE VOLUME ROTARY KNOB

The CUE VOLUME ROTARY KNOB adjusts your HEADPHONE
MONITOR OUTPUT’S volume.

CHANNEL CUE SELECTOR SWITCH

The CHANNEL CUE SELECTOR SWITCH allows you to choose
which channel you wish to monitor in your headphones by pressing
this switch on any channel you will be able to listen to that channels
input in your headphones multiple CHANNEL SWITCHES can be
pressed to monitor more than on input at a a time.

5

13

14

15

16

17

19

22

1923

PS-828EFX

EFFECTS:

EFX CONTROLS

The PS-828EFX has three effects and any one effect can be chosen
by pressing its respective button, once an effect is chosen a red LED
light will illuminate indicating the effect is engaged you may then
change its parameters with the EFX PARAMETER jog wheel.
Each effect only engages momentarily then defaults back to (0)
effect, you can keep the effect from defaulting by pressing the HOLD
button located above the effects buttons, the HOLD button will hold
the effect indefinitely until you either disengage the button or engage
a new effect. The HOLD LED will illuminate when HOLD is engaged.

1924

EFX PARAMETER JOG WHEEL

The EFX PARAMETER JOG WHEEL allows you to adjust either the
depth and speed of an effect like with the FLANGER and TRANS
or what the effect does like with the FILTER.

FILTER

With the FILTER the EFX PARAMETER JOG WHEEL controls how
much the filter will cut, for example if you spin the JOG WHEEL all
the way to the left the filter will cut off all the HIGH frequencies
leaving only the LOW’S, and if you spin it all the way to the right, the
filter will cut off all the LOW’S leaving just the HIGH end frequencies.

FLANGER

With the FLANGER the EFX PARAMETER WHEEL controls how
deep the flanger will sound. Turn the wheel either way just a little
and the FLANGER is barely audible, the more you turn the wheel in
either direction, the FLANGER will get deeper sounding and give
you the tunnel or jet plane sound effect.

TRANS

Or TRANSFORMER effect will turn the volume of the track off and
on fast or slow depending where the EFX PARAMETER WHEEL is,
giving you a TRANSFORMER sounding effect. Turn the wheel in
either direction just a little and the effect will cut the music volume up
and down slowly, keep turning the wheel in either direction and the
effect will cut the music volume up and down quickly, you can then
adjust the speed of the transfom effect to match the tempo of your
music.

EFFECTS ASSIGN

The PS-828EFX has an EFX SEND on each channel that allows you
to SEND that channels signal individually to the effect section of the
mixer, any combination of the four can be applied and all can send at
once.

25

26

FADER REPLACEMENT:

SPECIFICATIONS:

1. UNSCREW THE FADER (B) SCREWS. DO NOT TOUCH INSIDE
SCREWS (C) CAREFULLY REMOVE OLD CROSS FADER AND UNPLUG
CABLE (D)

2. PLUG IN THE NEW CROSS
FADER INTO CABLE (D) AND
PLACE BACK INTO MIXER.

3. SCREW THE CROSS FADER TO
MIXER WITH THE FADER PLATE
SCREWS (B)

4. REPLACE THE FACE OF THE
MIXER AND SCREW THE FOUR

SCREWS BACK IN AND REPLACE THE FADER KNOBS.

INPUTS:

Phono............................................................................3mV,47 K Ohm

Line.........................................................................150 mV, 27 K Ohm

MIC.............................................................1.5 mV, 1 KOhm Balanced

OUTPUTS:

Max..........................................................................20V Peak-to Peak

Rec............................................................................225 mV, 5 K Ohm

GENERAL:

Frequency Response.........................................20Hz - 20KHz +/- 2dB

Distortion..................................................................................< 0.02%

S/N Ratio...................................................................Better than 85 dB

Headphone impedance............................................................32 Ohm

Power Source ..............................................................AC 15V 500mA

Unit dimensions............................................................10” x 3.3” x 12”

.............................................................................(318 x 85 x 356 mm)

Weight.......................................................................10.5 lbs (4.76 kg)

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTIFICATION

FOR IMPROVEMENT

6

PS-828EFX