Gemini PS-900 PRO User Manual

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Introduction

Congratulations on purchasing the Gemini PS-900 PRO mixer. This state
of the art mixer is backed by a three year warranty, excluding
crossfader and channel slides. Prior to use, we suggest that you
carefully read all the instructions.

Features

• 4 Stereo Channels

• State of the Art Cue Section

• 3 Phono/Line Convertible, 5 Line, and 3 Mic Inputs

• Cut Feature for Bass, Mid and High for each channel

• Gain, High, Mid and Bass tone controls for each channel

• Talkover

• Loop

• Balanced and Unbalanced Master Outputs

• BOOTH and Record outputs

• Dual mode display

• Digital Sampler with 5 Memory Banks

• Battery backup to retain samples

Cautions

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

2. To reduce the risk of electrical shock, do not open the unit. There are
NO USER REPLACEABLE PARTS INSIDE. Please refer servicing to
a qualified service technician.

In the U.S.A., if you have any problems with this unit,
call 1-732-738-9003 for customer service. Do not return
equipment to your dealer.

3. Do not expose this unit to direct sunlight or to 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 ANY SPRAY CLEANER OR LUBRICANT ON ANY
CONTROLS OR SWITCHES.

to connect to your main amplifier. The REC OUTPUT (51) jacks can
be used to connect the mixer to the record input of your recorder
enabling you to record your mix. The BOOTH OUTPUT (50) jacks
allow you to hook up an additional amplifier.

4. The MIC 1 (1) input (found on the front panel) accepts a 1/4" or XLR
connector. The MIC 2 (66) input and the MIC 3 (65) input (found on
the rear panel) accept 1/4" connectors. All accept balanced and
unbalanced microphones.

5. On the rear panel are 3 stereo PHONO/LINE (57, 60, 63) inputs and
5 stereo LINE (54, 55, 56, 59, 62) inputs. The PHONO/LINE

SWITCH (58) enables you to set the (57) input to Phono or Line. The
PHONO/LINE SWITCH (61) enables you to set the (60) input to

Phono or Line. The PHONO/LINE SWITCH (64) enables you to set
the (63) input to Phono or Line. The phono inputs will accept only
turntables with a magnetic cartridge. A GROUND SCREW (67) for
you to ground your turntables is located on the rear panel. The stereo
line inputs will accept any line level input such as a CD player, a
cassette player, etc.

6. Headphones can be plugged into the front panel mounted
HEADPHONE (45) jack.

7. The PS-900 PRO comes with a front panel BNC LIGHT (40) jack.
This jack is for use with a gooseneck light like the Gemini GNL-700.

8. There are LOOP INPUTS (53) and LOOP OUTPUTS (52) located on
the rear panel. If you are using an outboard signal processor, you
can use the LOOP OUTPUTS (52) to send the signal to the device
and the LOOP INPUTS (53) to bring the signal back in to the mixer.
The unit comes with jumpers to be used with the loop inputs and
outputs. Keep the jumpers in the unit if you are not using the loop to
prevent interruptions in your music program.

Using the Ground Lift Switch

Depending on your system configuration, sometimes applying the
ground will create a quieter signal path. Sometimes lifting the ground
can eliminate ground loops and hum to create a quieter signal path.

1. With the mixer on, listen to the system in idle mode (no signal
present) with the ground applied (the GROUND LIFT SWITCH (68) in
the left position).

2. Then turn the power off before moving the GROUND LIFT

SWITCH (68). Lift the ground by moving the GROUND LIFT
SWITCH to the right, turn the power back on and listen to determine

which position will provide a signal devoid of background noise and
hum. Keep the GROUND LIFT SWITCH in the ground position if the
noise level remains the same in either position.

CAUTION: DO NOT TERMINATE THE AC GROUND ON THE POWER
MIXER IN ANY WAY. TERMINATION OF THE AC GROUND CAN BE
HAZARDOUS.

Connections

1. Before plugging in the power cord, make sure that the VOLTAGE
SELECTOR (46) switch is set to the correct voltage.

NOTE: This product is double insulated and not intended
to be grounded.

2. Make sure that the POWER (41) switch is in the off position. The
POWER LED (42) will be off.

3. The PS-900 PRO is supplied with 4 sets of amp output jacks. The
BALANCED OUTPUT (48) jacks are used to connect to your main
amplifier using standard XLR cables. We recommend using the
balanced amp outputs if the cables to your amp are 25 feet or more.
BALANCED OUTPUTS have three separate conductors, two of
which are signal (positive and negative) and one shield (ground). Pin
1 is ground (shield). Pin 2 is signal hot (positive). Pin 3 is signal cold
(negative). The MAIN OUTPUT (49) jacks are unbalanced and used

Operation

1. POWER ON: Once you have made all the equipment connections to
your mixer, press the POWER SWITCH (41). The power will turn on
and the POWER LED (42) will glow RED.

2. CHANNEL 1: The GAIN (9), HIGH (10), MID (11), and LOW (12)
controls allow you to fully adjust the selected source. Switch # (13)
allows you to select the PHONO 1/LINE 1 (63) or the LINE 2 (62)
input. The CHANNEL SLIDE (14) controls the input level of this
channel.

3. CHANNEL 2: The GAIN (9), HIGH (10), MID (11), and LOW (12)
controls allow you to fully adjust the selected source. Switch # (15)
allows you to select the PHONO 2/LINE 3 (60) or the LINE 4 (59)
input. The CHANNEL SLIDE (16) controls the input level of this
channel.

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4. CHANNEL 3: The GAIN (9), HIGH (10), MID (11), and LOW (12)
controls allow you to fully adjust the selected source. Switch # (17)
allows you to select the PHONO 3/LINE 5 (57) or the LINE 6 (56)
input. The CHANNEL SLIDE (18) controls the input level of this
channel.

5. CHANNEL 4: The GAIN (9), HIGH (10), MID (11), and LOW (12)
controls allow you to fully adjust the selected source. Switch # (19)
allows you to select the LINE 7 (55), LINE 8 (54) or the MIC 3 (65)
input. The CHANNEL SLIDE (20) controls the input level of this
channel.

NOTE: There is Low, Mid and High equalization for each
channel with an extremely wide range of adjustment.

SUGGESTION: You can use the Cut Features on each channel to
remove Low, Mid and/or High to create special effects.

6. CROSSFADER SECTION: The CROSSFADER (22) allows the
mixing of one source into another. The PS-900 PRO features an
assignable crossfader. The ASSIGN (21, 23) switches allow you to
select which channel will play through each side of the crossfader.
The ASSIGN (21) switch has 5 settings (OFF, 1, 2, 3 or 4) and allows
you to select channel 1, 2, 3 or 4 to play through the left side of the
crossfader. The ASSIGN (23) switch has 5 settings (OFF, 1, 2, 3 or

4) and allows you to select channel 1, 2, 3 or 4 to play through the
right side of the crossfader. With the ASSIGN switch in the off
position, that side of the crossfader will be inactive. The
CROSSFADER (22) in your unit is removable and if the need arises
can be easily replaced. Crossfader units are available in three
varieties. Part # RF-45 (which is identical to the crossfader supplied
with the mixer) has a 45 mm travel from side to side. Part # RF-30 is
available with a 30 mm travel distance. Also available is the PSF-45
with a special curve designed for scratch mixing. Just purchase one
of these crossfader units from your Gemini dealer and follow these
instructions:

1. Unscrew the outside FADER PLATE SCREWS (B). Do
not touch the INSIDE SCREWS (C).

2. Carefully lift the fader and unplug the CABLE (D).

3. Plug the new fader into the cable and place it back in the
mixer.

4. Screw the fader to the mixer.

7. LOOP SECTION: Removing the jumpers from the LOOP OUTPUT
(52) and INPUT (53) jacks will activate the loop. Any device
connected to the LOOP OUTPUT (52) and INPUT (53) jacks will be
inserted into the signal path.

8. OUTPUT CONTROL SECTION: The level of the AMP OUT (48, 49)
is controlled by the MASTER (31) slide and BALANCE (30) control.
Activating the MONO (29) button (the mono LED will light) makes the
overall output mono. The BOOTH (28) control adjusts the level of the
BOOTH OUTPUT (50). HINT: The BOOTH OUTPUT is used by
some DJs to run monitor speakers in their DJ Booth. You can also
use it as a second ZONE or AMP output.

NOTE: The RECORD OUT (51) has no level control. The
level is set by the channel slides and the gain controls of
the selected channel. The tonal qualities are set by the
low, mid and high controls of that same channel.

9. TALKOVER SECTION: The purpose of the talkover section is to allow
the program playing to be muted so that the mic can be heard above
the music. The MIC/TALKOVER SWITCH (7) controls MIC 1 and MIC
2 and has three settings. When the MIC/TALKOVER SWITCH (7) is
in the bottom position, MIC 1 and MIC 2 and talkover are off. When
the MIC/TALKOVER SWITCH (7) is in the center position MIC 1 and
MIC 2 are on, the MIC INDICATOR (6) will glow, but talkover is off.
When the MIC/TALKOVER SWITCH (7) is in the top position, MIC 1
and MIC 2 and talkover will be on and the volume of all sources
except the Mic inputs are lowered by 16 dB. The TREBLE (2) and
BASS (3) controls allow you to fully adjust the tone of MIC 1 and MIC

2. MIC 1 LEVEL (5) controls the level of MIC 1. The MIC 2 LEVEL
(4) controls the level of MIC 2.

10.CUE SECTION: By connecting a set of headphones to the
HEADPHONE (45) jack, you can monitor any or all of the channels.
Press the CUE/SAMPLE ASSIGN (24) buttons for channels 1 - 4 to
select the channel or channels to be monitored and their respective
LED indicators will glow. Press the CUE/SAMPLE ASSIGN (8) button
to monitor MIC 1 and MIC2. The CUE/SAMPLE ASSIGN (8, 24)
buttons are also used to assign samples (see Sampler Operation for
more details). Press the CUE SAMPLER (35) to monitor samples.
Use the CUE LEVEL (43) control to adjust the cue volume without
effecting the overall mix. By moving the CUE PGM PAN (38) control
to the left you will be able to monitor the assigned cue signal. Moving
the control to the right will monitor the PGM (program) output. Use
the CUE SPLIT (44) button to split the signals from cue and program
so that cue will be heard in one earphone and program will be heard
in the other earphone.

11. DISPLAY: The peak hold, dual function DISPLAY (25) indicates
either the MASTER (48, 49) output left and right levels OR the
selected cue and program (premaster output) levels. You can choose
the option you want by pressing the DISPLAY (26) button.

NOTE: When the DISPLAY (25) is in the cue/program mode,
by adjusting GAIN (9), you can increase or decrease the
signal to match the other channels signal.

Sampler Operation

GENERAL INFORMATION: The PS-900 PRO Sampler uses Dynamic
RAM memory and a 12 bit microprocessor controller. The full bandwidth
results in true sound reproduction.

MEMORY INFORMATION: The PS-900 PRO comes equipped with five
MEMORY BANKS (27). The two banks marked 2 & 2 are two seconds in
length, the two banks marked 4 & 4 are four seconds in length and the
bank marked 12 is twelve seconds in length. These banks are separate
and can not be linked. You can store a different sample in each bank but
they must be recorded individually and they must be played one at a time.

SAMPLE RECORDING:

1. Put the MODE SELECTOR (34) switch into the WRITE position.

2. Select the source you want to sample from by pressing the
appropriate CUE/SAMPLE ASSIGN (24, 8) button.

3. Select the memory bank you want to record into, by pressing the
proper MEMORY BANK (27) button.

4. The PS-900 PRO comes equipped with a sampler PITCH (33)
control. To get a perfect sample, set the control to its center position
and record the sample. During playback, raising or lowering the
control will raise or lower the pitch of the sample playback. The
center position will remain as normal pitch.

HINT: You can record a sample with the PITCH (33) control in any position.
Whatever that position is will become normal sound. If you start to record a sample
with the PITCH (33) control set at minimum (this now becomes your normal pitch),
by increasing the pitch to maximum, the pitch effect will double in speed. Recording
at maximum and lowering to minimum will do exactly the opposite.

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5. Tapping the START/STOP (39) button begins the sampling process
(the SAMPLER INDICATOR (37) will illuminate RED). Tapping the

START/STOP (39) button a second time ends the sample (the
SAMPLER INDICATOR (37) will turn off). If you do not tap the
START/STOP (39) button a second time, the sampling process will

stop automatically after 2, 4 or 12 seconds depending on which
MEMORY BANK (27) was selected.

SAMPLE PLAYBACK:

1. Put the MODE SELECTOR (34) switch into the SINGLE or REPEAT
position.

2. Select the memory bank you wish to play by pressing the proper
MEMORY BANK (27) button.

3. Tapping the START/STOP (39) button with the MODE SELECTOR
(34) switch in the SINGLE position will cause the sampler to
playback one time (the SAMPLER INDICATOR (37) will illuminate
GREEN). Every push of the START/STOP (39) button will restart the
sample from the beginning. Rapid pressing of the START/STOP (39)
button will cause a stuttering effect. Once the sample has started
playback and the START/STOP (39) button is not pushed a second
time, the sample will play to the end and then stop (the SAMPLER
INDICATOR (37) will turn off).

4. Tapping the START/STOP (39) button with the MODE SELECTOR
(34) switch in the REPEAT position will cause the sample to
continuously play over and over (the SAMPLER INDICATOR (37) will
illuminate GREEN). The START/STOP (39) button will act as an on/
off switch. The first push will start the sample, the second push will
stop it. The SAMPLER LEVEL (32) controls the level of the sample.

ROBO PLAY:

1. With the ROBO PLAY (36) button in the OFF POSITION (the ROBO
PLAY INDICATOR will be OFF) and the MODE SELECTOR (34)
switch in either the SINGLE or REPEAT mode, pressing the START/
STOP (39) button will cause the sample to play along with the
selected source.

2. When the ROBO PLAY (36) button is in the ON position (the ROBO
PLAY INDICATOR illuminates RED), starting the sampler mutes the
selected source. When the sample ends, the source automatically
turns back on.

BATTERY BACKUP: The PS-900 PRO is equipped with battery backup
to retain samples. To activate this feature, a 9 volt battery (not included)
needs to be connected to the BATTERY HOLDER (47) located on the
rear panel. This will enable you to store samples in memory, and when
the unit is unplugged, the battery backup will retain the samples for
future use. If the unit is unplugged with no battery attached, all the

samples will be lost.

LOW BATTERY INDICATOR: A low battery indicator is included with the
PS-900 PRO. When changing the battery, make sure the unit is plugged
in and the power is ON. Failure to adhere to this will result in lost
memory. The low battery indicator is ON when the selected memory
bank LED blinks. The LED will also blink if no battery is connected to the
unit.

Specifications

INPUTS:

DJ Mic....................................................1.5mV 2Kohm balanced

Phono.........................................................................3mV 47Kohm

Line.......................................................................150 mV 27Kohm

OUTPUTS:

Main/Aux......................................................0 dB 1V 400ohm

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

Rec...........................................................................225mV 5Kohm

MIC 1 & MIC 2:

DJ Mic....................................................1.5mV 2Kohm balanced

Bass......................................................................................± 12dB

High.......................................................................................± 12dB

MIC 3:

DJ Mic....................................................1.5mV 2Kohm balanced

Controls...........................................................................Channel 4

GENERAL:

Bass (Chnls 1-4).......................................................+ 12dB/- 32 dB

Mid (Chnls 1-4)..........................................................+ 12dB/- 32 dB

Treble (Chnls 1-4).....................................................+ 12dB/- 32 dB

Gain (Chnls 1-4)..............................................................0 to -20dB

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

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

S/N Ratio...............................................................better than 80dB

Talkover Attenuation..............................................................-16dB

Headphone Impedance.........................................................16ohm

Power Source.............................................115/230V 50/60Hz 10W

Dimensions.....................................................19”w x 4”h x 9”d

Weight........................................................................10.17 lbs

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Einleitung

Wir gratulieren Ihnen zum Kauf eines Gemini PS-900 PRO Mischpults.
Dieses moderne Mischpult enthält dreijährige Garantie, ausscheließlich
crossfader und Kanalschieber. Vor Anwendung dieses Mischpults bitte
alle Anweisungen sorgfältig durchlesen.

Funktionen

• 4 Stereokanäle

• Hochentwickelter Cue Funktion

• 3 Phonoleitungen/Leitung erweiterbar, Eingänge für 5 Leitungen und
3 Mikrophone

• CUT Funktion (Entfernungsfunktion) der Bass-, Mid- und High­Frequenzen in Kanälen 1 - 4

• Talkover

• Regelkreis

• Kompensierte und unkompensierte Master-Ausgänge

• Ausgänge für Kabine und Aufnahme

• Doppelte Tonartanzeige

• Digitalsampler mit 5 Speichern

• Batteriehilfsversorgung

Vorsichtsmaßnahmen

1. Vor Anwendung dieses Geräts bitte alle Anweisungen sorgfältig
durchlesen.

2. Das Gerät nicht öffnen, um das Risiko elektrischen Schocks zu
vermeiden. Es enthält KEINE VOM ANWENDER ERSETZBAREN
TEILE. Die Wartung darf nur von befähigten Wartungstechnikern
durchgeführt werden.

3. Das Gerät von direktem Sonnenlicht oder einer Wärmequelle wie
Heizkörper oder Ofen aussetzen.

4. Dieses Gerät darf nur mit einem feuchten Tuch gesäubert werden.
Keine Lösungs- oder Reinigungsmittel benutzen.

5. Bei Umzügen sollte das Gerät in seinem ursprünglichen
Versandkarton und Verpackungsmaterial verpackt werden. Dadurch
verhindert man, daß das Gerät während des Transportes beschädigt
wird.

6. DIESES GERÄT NICHT REGEN ODER FEUCHTIGKEIT
AUSSETZEN.

7. AN DEN REGLERN ODER SCHALTERN KEIN SPRAY­REINIGUNGSMITTEL ODER SCHMIERMITTEL BENUTZEN.

Anschlüsse

1. Bevor Sie das Stromkabel anschließen, darauf achten, daß der
VOLTAGE SELECTOR (46) (Spannungswähler) auf die richtige
Spannung einstellt ist.

HINWEIS: Dieses Produkt ist doppelisoliert und darf nicht
geerdet werden.

2. Darauf achten, daß der Spannungsschalter POWER (41) in Off­Position geschaltet ist. Die POWER LED (42) wird ausgeschaltet sein.

3. Der PS-900 PRO verfügt über 4 Ausgangsbuchsenpaare. Die Buchsen
BALANCED OUTPUT (48) dienen zum Anschluß an den
Hauptverstärker, wofür Standard-XLR-Kabel benutzt werden. Wir
empfehlen, kompensierte Ampereausgänge zu benutzen, wenn die
Kabel zu Ihren Ampereausgänge 8 m oder länger sind. Balanzierte
Ausgänge haben drei (3) verschiedene Leiter: zwei für Signal (positiv
und negativ) und ein für Schutz (Grund). Zu Pin 1 (Stift 1) gehört Grund
(Schutz). Zu Pin 2 (Stift 2) gehört das aktive Signal (positiv). Zu Pin 3
(Stift 3) gehört das inaktive Signal (negativ). Die Buchsen MAIN
OUTPUT (49) sind unkompensiert und dienen zum Anschluß an den
Hauptverstärker. Die Buchsen REC OUTPUT (51) können dazu
dienen, das Mischpult an den Aufnahmeeingang des

Aufnahmegerätes anzuschließen, um die Tonmischung aufnehmen
zu können. Die Buchsen BOOTH OUTPUT (50) ermöglichen
Anschluß an einen zusätzlichen Verstärker.

4. Der Eingang DJ MIC 1 (1) (an der Vorderseite) hat einen
Durchmesser von 0,38 mm (1/4"). Der Eingang DJ MIC 2 (66) und
der Eingang DJ MIC 3 (65) (an der Rückwand angebracht) nehmen
nur Anschlüsse mit Durchmesser von 0,38 mm auf. Alle nehmen
balanzierte und unbalanzierte Mikrophone auf.

5. An der Rückwand sind jeweils 3 Stereoeingänge PHONO/LINE (57,
60, 63), und 5 Stereoeingänge LINE (54, 55, 56, 59, 62). Der
Schalter PHONO/LINE (58) ermöglicht Ihnen, die Eingänge (57) an
Phono oder Line anzuschließen. Der Schalter PHONO/LINE (61)
ermöglicht Ihnen, die Eingänge (60) an Phono oder Line
anzuschließen. Der Schalter PHONO/LINE (64) ermöglicht Ihnen, die
Eingänge (63) an Phono oder Line anzuschließen. Die Phono­Eingänge werden nur Plattenspieler mit einem magnetischem
Tonabnehmer aufnehmen. Eine Erdungschraube GROUND SCREW
(67) zur Erdung des Plattenspielers ist an der Rückwand angebracht.
Die Stereo-Leitungseingängen nehmen Geräte wie CD- oder
Kassettenspieler auf.

6. Kopfhörer können an der an der Vorderwand montierten Kopfhörer­Buchse HEADPHONE (45) eingesteckt werden.

7. Das Mischpult PS-900 PRO hat einen Anschluß BNC LIGHT (40)
(BNC-lampe) auf der vorderen Schalttafel. Dieser Anschluß ist für
eine flexible Lampe wie z.B. eine Gemini GNL-700 bestimmt.

8. Die LOOP INPUTS (53) (Regelkreiseingänge) und die LOOP
OUTPUTS (52) (Regelkreisausgänge) sind an der Rückwand
angebracht. Falls Sie Ausgangssignalanreicherung benutzen,
können Sie die LOOP OUTPUTS (52) benutzen, um das Signal zum
Gerät zu senden, und die LOOP INPUTS (53) benutzen, um zum
Mischpult zurückzusignalisieren. Dias Gerät wird mit Jumpers
geliefert, die mit den Regelkreiseingängen und -ausgängen zu
benutzen sind. Wenn Sie den Regelkreis nicht benutzen, sollten die
Jumpers im Gerät bleiben, um Unterbrechungen im
Abspielprogramm zu verhindern.

Benutzung des Masse-Trennschalters

Abhängig von Ihrer Systemkonfiguration, wenn man hin und wieder
Masse anlegt, kann man damit einen ruhigeren Signalpfad schaffen.
Wenn man hin und wieder die Masse trennt, kann man dadurch
Massekreise und Brummen eliminieren, um einen ruhigeren Signalpfad
schaffen.

1. Wenn das Mischpult eingeschaltet ist, das System im Ruhemodus
(ohne Signal) bei angelegter Masse abhorchen (der Masse-
Trennschalter - GROUND LIFT SWITCH (68) ist nach links
geschaltet).

2. Dann den Leistungsschalter ausschalten bevor der Masse-
Trennschalter - GROUND LIFT SWITCH (68) betätigt wird. Den
Masse-Trennschalter nach rechts legen, die Leistung wieder
einschalten und horchen, um zu bestimmen, welche Position ein
Signal ohne Grundgeräusch und Brummen erzeugt. Den Masse­Trennschalter in Masseposition halten, falls der Geräuschpegel in
beiden Position unverändert bleibt.

VORSICHT: DIE MASSE IN KEINER WEISE AM MISCHPULT
ABSCHLIESSEN. DER ENDABSCHLUSS DER MASSE KANN MIT
GEFAHREN VERBUNDEN SEIN.

Bedienung

1. STROM EIN: Nachdem Sie das Gerät am Mischpult angeschlossen
haben, drücken Sie auf die Taste POWER (41). Der Strom wird
eingeschaltet und die POWER LED (42) erleuchtet ROT.

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