Gemini Musical Instrument PS 767 User Manual

OPERATIONS MANUAL  
PS-767  
STEREO PREAMP MIXER  
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7. The PS-767 comes with a front panel XLR LIGHT (5) jack. This jack is  
for use with a gooseneck light like the Gemini GNL-500. NEVER plug a  
microphone into this jack.  
INTRODUCTION  
Congratulations on purchasing a Gemini Platinum Series model PS-767  
mixer. This state of the art mixer includes the latest features backed by a  
three year warranty. Prior to use, we suggest that you carefully read all the  
instructions.  
8. If you are using an off board signal enhancer, you can use the SEND  
(80) output to send the signal to the device and the RECEIVE (81) input  
jacks to bring the signal back in to the PS-767.  
9. The PS-767 is supplied with DJ MIC LOOP (82) jacks that can be used  
to add an audio enhancer such as a key controller to the mic circuit..  
There must be a connection to these jacks. If no device is being used in  
the DJ mic loop, then the jumper wire (included) must be in place.  
FEATURES  
4 Stereo channels (2 Phono/6 Line)  
1 DJ Mic channel  
1 Aux Mic or Line Mono channel  
Combo XLR or 1/4" DJ Mic jack  
Bass, Mid, Treble and Gain controls on each channel  
The DJ Mic and Aux channels have pan controls  
Assignable, removable crossfader  
Assignable Beat indicators  
OPERATION  
1. POWER ON: Once you have made all the equipment connections to  
your mixer, press the POWER SWITCH (1). The power will turn on and  
the POWER LED (2) will glow RED.  
2. DJ MIC SECTION: The GAIN (6), TREBLE (7), MID (8), BASS (9), PAN  
(10) and LEVEL (11) controls allow full adjustment of the DJ mic that is  
plugged into the DJ MIC (3) input.  
Assignable Send plus Receive effects circuitry for adding off board  
sound enhancers such as digital samplers  
Note: The OVERLOAD LED (12) glows red when the DJ mic is  
being over driven. To correct the setting, turn down the GAIN  
(6) control until the LED goes off.  
DJ Mic loop  
6 Drum sound effects  
3. AUX CHANNEL: By using the AUX MIC/LINE (13) switch, you can  
choose between an additional mic or an additional mono line input. The  
GAIN (14), TREBLE (15), MID (16), BASS (17), PAN (18) and LEVEL  
(19) controls fully adjust the Aux Channel input you selected with the  
AUX MIC/LINE (13) switch.  
Echo section assignable to Mic or Music with appropriate delay times for  
each source  
WORDS TO THE WISE  
1. All operating instructions should be read before using this equipment.  
Note: The OVERLOAD LED (20) glows red when the Aux  
Channel is being over driven. To correct the setting, turn down  
the GAIN (14) control until the LED goes off.  
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.  
HINT: Like the DJ Mic, the Aux Channel is always live. Hooking up another  
mic or a mono line device such as a sound effects generator or a drum  
machine, will allow you to play the selected source at any time.  
3. Do not expose this unit to direct sunlight or to a heat source such as a  
radiator or stove.  
4. MAIN CHANNEL SECTION: To assign an input source to a channel, set  
the PHONO/LINE (29,30) and the LINE/LINE (31, 32) switches to their  
appropriate positions. To make the proper adjustments to your music,  
set the TREBLE (21), MID (22), BASS (23) and GAIN (24) controls and  
the CHANNEL (25, 26, 27, 28) slides.  
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.  
5. CROSSFADER SECTION: The CROSSFADER (38) allows the mixing of  
one source into another. The PS-767 features an assignable crossfader.  
The ASSIGN (39,43) switches allow you to select which cannel will play  
through each side of the CROSSFADER. ASSIGN (39) switch allows  
you to select channel 1, 2, 3 or 4 to play through the left side of the  
CROSSFADER. ASSIGN (43) switch does the same to the right side of  
the CROSSFADER. Each assign switch has its own OFF (40) switch  
and OFF INDICATOR (41) LED. With the OFF (40) switch in the off  
position (the OFF INDICATOR (41) glows red), that side of the  
CROSSFADER (38) will be inactive.  
CAUTIONS  
DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.  
DO NOT USE ANY SPRAY CLEANER OR LUBRICANT ON ANY  
CONTROLS OR SWITCHES.  
CONNECTIONS  
1. Before plugging in the power cord, make sure that the VOLTAGE  
SELECTOR (65) switch is set to the correct voltage.  
HINT: Try using the OFF (40) switches when you are changing the ASSIGN  
(39,43) switch settings. For Example: Assume that you have a turntable  
hooked up to channel 1, a tape deck hooked up to channel 2 and a CD  
player hooked up to channel 3. The left side ASSIGN (39) switch is set to 1,  
the right side ASSIGN (43) is set to 2, and the CROSSFADER (38) is all the  
way to the right. Under this set of circumstances, channel 2 will be playing  
your tape deck. Now suppose you want to change the left side ASSIGN (39)  
switch to # 3 so that you can use your CD player. You must turn the left side  
ASSIGN (39) off by pressing the OFF (40) Switch (the OFF INDICATOR  
(41) glows red). Then you can make your changes to the setting. Reactivate  
the ASSIGN (39) switch by pressing the OFF (40) switch (the OFF  
INDICATOR (41) goes off). Failure to do this will result in an audio glitch  
when the ASSIGN (39) switch setting is changed.  
Note: This product is double insulated and not intended to be  
grounded.  
2. Make sure that the POWER (1) switch is in the off position. The  
POWER LED (2) will be off.  
3. The PS-767 is supplied with 3 sets of output jacks. The OUTPUT AMP  
(66) jacks are used to connect to your main amplifier. The OUTPUT  
REC (67) jacks can be used to connect the mixer to the record input of  
your recorder enabling you to record your mix. The OUTPUT BOOTH  
(68) jacks allow you to hook up an additional amplifier.  
4. The PS-767 is equipped with 2 microphone inputs. The DJ MIC (3) input  
(found on the front panel) accepts 1/4" or XLR connectors and suitable  
for balanced or unbalanced microphones. The AUX MIC (69) input (found  
on the rear panel) is a 1/4" jack for an unbalanced microphone.  
The CROSSFADER (38) in your unit is REMOVABLE and if the need  
arises can be easily replaced. Crossfader units are available in two  
sizes. Part # RF-45 (which is identical to the crossfader supplied with the  
PS-767) has a 45 mm travel from side to side. Also available is part #  
RF-30 which has a 30 mm travel distance Just purchase either of these  
crossfader units from your Gemini dealer and follow these instructions:  
5. On the rear panel are 2 stereo PHONO (70, 71) inputs, 6 stereo LINE  
(72, 73, 74, 75, 76, 77) inputs and 1 mono AUX LINE (78) input. The  
stereo phono inputs will accept only turntables with a magnetic cartridge.  
A GROUND (79) screw 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.  
Note: The AUX LINE (78) input is composed of 2 RCA jacks.  
When connecting a mono line level source, either jack can be  
used. By connecting a stereo line level device to both jacks, the  
input will be combined to one mono signal.  
6. Headphones can be plugged into the front panel mounted HEADPHONE  
(4) jack.  
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1. Unscrew the outside FADER plate screws (B). Do not  
touch the INSIDE SCREWS (C).  
HEADPHONE (4) jack, you can monitor any or all of the channels. CUE  
ASSIGN (55) buttons are for the channels 1 - 4 and the CUE ASSIGN  
(56) button is for the Aux Mic/Line Mono channel and the DJ Mic.  
2. Carefully lift the fader and unplug the CABLE (D).  
HINT: When you are using the DJ Mic and have a device connected to the  
DJ Mic Loop, the signal you hear in the headphones includes the device in  
the loop.  
3. Plug the new fader into the cable and place it back in the  
mixer.  
4. Screw the fader to the mixer.  
Select the correct Cue assign button or buttons and their respective  
LED indicators will glow. Use the HEADPHONE LEVEL (57) control to  
adjust the headphone volume with out effecting the overall mix. By  
rotating the CUE PGM PAN (58) control to the left you will be able to  
monitor the assigned cue signal. Rotating to the right will monitor the  
PGM (program) output.  
11. ECHO SECTION: Echo can be applied to either the microphones or the  
music but not to both. To select the microphone option, press the MIC  
ECHO (59) button (the LED will glow). To select the music option use the  
MUSIC ECHO (60) button. You can adjust the level, repeat and delay  
parameters of the echo by using the ECHO (62) controls.To turn echo  
off, push the OFF ECHO (61) button.  
12. DRUM EFFECTS SECTION: Six different drum effects (BASS DRUM,  
CYMBAL, LASER DRUM, SNARE DRUM, HI CONGA and CLAPS) may  
be added to your mix by depressing the DRUM EFFECT (63) buttons.  
Adjust the level by turning the LEVEL (64) control.  
6. BEAT INDICATORS: Each side of the CROSSFADER (38) has its own  
BEAT INDICATOR 42, 44). They flash at the low frequency peak level  
of each assigned source, allowing you to match the beats visually.  
BEAT INDICATOR (42) will reflect the beat of the source assigned to the  
left side of the CROSSFADER (38) and BEAT INDICATOR (44) will do  
the same for the right side.  
SPECIFICATIONS  
INPUTS:  
Note: The flashing level can be fine tuned by increasing or  
decreasing the gain and bass controls of the assigned channel.  
DJ Mic.......................................1.5mV 3Kohm balanced/unbalanced  
Aux Mic..............................................1.5mV 10Kohm unbalanced only  
Aux Line...................................................................150mV 27Kohm  
DJ Loop............................................................................150mV 10Kohm  
Phono............................................................................3mV 47Kohm  
Line................................................................................150 mV 27Kohm  
Receive...........................................................................75mV 27Kohm  
OUTPUTS:  
7. OUTPUT CONTROL SECTION: The level of the AMP OUT (66) is  
controlled by the MASTER (33) slide. The BALANCE (34) control will  
allow the Amp Out signal to be balanced between the left and right  
speakers. The MONO (35) switch, when depressed, (the MONO LED  
(36) will glow), will make the Amp Out signal a mono signal. The BOOTH  
(37) control adjusts the level of the BOOTH OUTPUT (68).  
Amp/Booth...........................................................0 dB 775mV 400ohm  
Max...............................................24V Peak to Peak  
Rec.............................................................................225mV 5Kohm  
DJ Loop.......................................................................150mV 220ohm  
Send..................................................................................150 mV 300ohm  
GENERAL:  
Note: The LED DISPLAY (48) indicates the AMP OUT (66)  
signal only and is not affected by the BOOTH OUTPUT (68)  
signal.  
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 (67) has no level control. The level is  
set by the channel slides and the gain control of the selected  
channel. The tonal qualities are set by the bass, treble and mid  
controls of that same channel.  
Bass.............................................................................................+/- 12dB  
Mid.................................................................................................+/- 9dB  
Treble...........................................................................................+/- 12dB  
Echo.......................................................................................600msec  
Gain (Mic/Aux)............................................................................0 to -40dB  
Gain (Chnls 1-4)........................................................................0 to -20dB  
Frequency Response........................................20Hz - 20KHz +/- 2dB  
Distortion.....................................................................................0.02%  
S/N Ratio......................................................................better than 80dB  
Talkover Attenuation............................................................-6 to -36dB  
Headphone Impedance................................................................16ohm  
Power Source.......................................................115/230V 50/60Hz 15W  
Dimensions...................................................482mm x 240mm x 110mm  
19" x 9 1/2" x 4 1/4"  
8. 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. When the TALKOVER ON/OFF (45) button is pushed (the  
TALKOVER INDICATOR (46) will glow), the volume of all sources except  
the DJ Mic and the Aux channel are reduced. The amount of reduction  
can be set between -6 dB and -36 dB by using the MUTE LEVEL (47)  
control.  
9. SEND AND RECEIVE SECTION: By using the SEND ASSIGN (49)  
switch, you can send the selected signal to some sort of audio  
enhancement device (like a digital sampler or key controller). The level  
of the signal being sent can be adjusted by the SEND (50) control. To  
receive the signal back into the PS-767, you must first turn on the RCV  
ON (51) switch (LED (52) will light). The level of the signal being  
received can be adjusted with the RECEIVE (53) control.  
Weight.............................................................................11lbs (5Kg)  
Note: The signal being received back into the PS-767 can be  
monitored by using the headphones and by pressing the  
RECEIVE (54) cue control. If the RCV ON (51) switch is in  
the off position (LED (52) is off), the level of the signal can be  
monitored and adjusted prior to its playing through the output.  
Turning the RCV ON (51) switch to the on position connects  
the received signal to the output section.  
HINT: The RECEIVE (81) input can be used as an additional stereo line level  
input controlled by the RECEIVE (53) and activated by the RCV ON (51)  
switch.  
10. CUE SECTION: By connecting a set of headphones to the  
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In the U.S.A., if you have any problems with this  
unit, call 1-732-969-9000 for customer service. Do  
not return equipment to your dealer.  
Parts of the design of this product may be protected by worldwide patents.  
Information in this manual is subject to change without notice and does not represent a commitment on the  
part of the vendor. Gemini Sound Products Corp. shall not be liable for any loss or damage whatsoever arising  
from the use of information or any error contained in this manual.  
No part of this manual may be reproduced, stored in a retrieval system or transmitted, in any form or by any  
means, electronic, electrical, mechanical, optical, chemical, including photocopying and recording, for any  
purpose without the express written permission of Gemini Sound Products Corp..  
It is recommended that all maintenance and service on the product should be carried out by Gemini Sound  
Products Corp. or it’s authorized agents. Gemini Sound Products Corp. cannot accept any liability whatsoever  
for any loss or damage caused by service, maintenance or repair by unauthorized personnel.  
Worldwide Headquarters • 8 Germak Drive, Carteret, NJ 07008 • USA  
Tel (732) 969-9000 • Fax (732) 969-9090  
France • G.S.L. France • 11, Avenue Leon Harmel, Z.I. Antony, 92160 Antony, France  
Tel: + 33 (0) 1 55 59 04 70 • Fax: + 33 (0) 1 55 59 04 80  
Germany • Gemini Sound Products GmbH • Ottostrasse 6, 85757 Karlsfeld, Germany  
Tel: 08131 - 39171-0 • Fax: 08131 - 39171-9  
UK • Gemini Sound Products • Unit C4 Hazleton Industrial Estate, Waterlooville, UK P08 9JU  
Tel: 087 087 00880 • Fax: 087 087 00990  
Spain • Gemini Sound Products S.A. • Mino, 112, Nave 1, 08223 Terrassa, Barcelona, Spain  
Tel: 011-34-93-736-34-00 • Fax: 011-34-93-736-34-01  
© Gemini Sound Products Corp. 1997 All Rights Reserved  
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