Gemini Musical Instrument PS 650I User Manual

OPERATORS MANUAL  
BEDIENUNGSHANDBUCH  
MANUAL DEL OPERADOR  
MANUEL D’INSTRUCTIONS  
PS-650i  
PROFESSIONAL STEREO PREAMP MIXER  
Professionneller Stereo Vorverstärkermischpult  
Mezclador-preamplificador estereofónico para el profesional  
Mélangeur-préamplificateur stéréophonique pour le professionnel  
Miscelatore-preamplificatore stereofonico per il professionale  
 
41  
42  
PS-650i  
Page 3  
 
additional amplifier.  
INTRODUCTION  
Congratulations on purchasing a Gemini Platinum Series model PS-650i  
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.  
5. On the rear panel are 2 stereo PHONO (32,34) inputs, 2 stereo LINE  
(31,33) inputs and 1 stereo PHONO/LINE (36) input. The PHONO/  
LINE (35) switch enables you to set the (36) input to Phono or Line.  
The phono inputs will accept only turntables with a magnetic  
cartridge. A GROUND (37) screw 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.  
FEATURES  
6. Headphones can be plugged into the front panel mounted  
HEADPHONE (4) jack.  
Cut Feature for Low, Mid and High of each channel  
BPM Display  
THE GROUND LIFT SWITCH  
epending on your system configuration, applying the ground  
sometimes creates a quieter signal path. Sometimes “lifting” the  
3 Stereo channels (3 Phono, 3 Line and 1 Mic)  
Neutrik ComBo XLR/Jack DJ Mic.  
Low, Mid, High and Gain controls on each channel  
Beat Offset Indicators  
D
ground eliminates loops and hum to create a quieter signal path.  
1. Listen to the system with the unit ON, without music, and with the  
ground “applied”. GROUND LIFT SWITCH (41) should be to the left.  
Master, Booth and Record outputs  
2. Turn power OFF before moving the GROUND LIFT SWITCH.  
Dual mode display (Left & Right output or Channel 2 and Channel 3)  
Push button cueing with Cue/Program pan control  
3. Now, “lift” the ground by moving the GROUND LIFT SWITCH to the  
right. Turn the power back ON and listen to determine which  
position provides a signal free of background noise and hum.  
CAUTIONS  
1. All operating instructions should be read before using this  
equipment.  
Note: Keep GROUND LIFT in the ground “applied” or left position if  
noise level remains the same in either position.  
CAUTION: DO NOT TERMINATE THE AC GROUND ON THE POWER  
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 Gemini Sound Products service technician.  
K
CABLE. TERMINATION OF THE AC GROUND CAN BE HAZARDOUS.  
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.  
In the USA: if you experience problems with this unit, please  
call 1 (732) 969-9000 for Gemini Customer Service.  
Do not attempt to return this equipment to your dealer.  
3. Do not expose this unit to direct sunlight or to a heat source such as  
a radiator or stove.  
2. CHANNEL 1: The GAIN (6), HIGH (7), MID (8), and LOW (9) controls  
allow you to fully adjust the selected source. Switch (10) allows  
you to select either the mic or the PHONO/LINE (36) input. The  
CHANNEL SLIDE (13) controls the output level of this channel.  
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.  
3. MAIN CHANNEL SECTION: To assign an input source to a channel,  
first set the PHONO/LINE (11,12) switches to their appropriate  
positions. To make the proper adjustments to your music, set the  
GAIN (6), HIGH (7), MID (8) and LOW (9) controls, and position the  
CHANNEL SLIDE (14,15).  
6. DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.  
7. DO NOT USE ANY SPRAY CLEANER OR LUBRICANT ON ANY  
CONTROLS OR SWITCHES.  
PLEASE NOTE: There is Low, Mid and High equalization for  
each channel with an extremely wide range of  
adjustment.  
CONNECTIONS  
1. Before plugging in the power cord, make sure that the VOLTAGE  
SELECTOR (30) switch is set to the correct voltage.  
SUGGESTION: You can use the Cut Features on each  
channel to remove Low, Mid and/or High range to create  
special effects.  
NOTE: This product is double insulated and is not  
intended to be grounded.  
he Crossfader in your unit is removable, and should the need  
arise, can easily be replaced by following these instructions.  
)
2. Make sure that the POWER (1) switch is in the off position. The  
T
Note: Gemini replacement Crossfaders are available in three  
POWER LED (2) will be off.  
varieties: the RG-45 PRO (RAIL GLIDETM)Dual-Rail Crossfader; the RF-  
45, which has a 45mm travel from side-to-side; and the PSF-45, which  
features a special “curve” designed for scratch mixing.  
3. The PS-650i is supplied with four (4) sets of output jacks.  
The 1/4" BALANCED OUTPUT (29) jacks are used to connect to  
your main amplifier using standard balanced cables. We recommend  
using balanced amp outputs if the cables to your amp are 10 feet or  
more.  
1. Unscrew the outside  
FADER PLATE SCREWS (B).  
- Do not touch INSIDE SCREWS (C).  
The MAIN OUTPUT (38) (RCA type) jacks are unbalanced and used  
to connect to your main amplifier.  
2. Carefully remove old Cross-  
fader and unplug CABLE (D).  
The REC OUTPUT (40) (RCA type) jacks can be used to connect the  
mixer to the record input of your recorder enabling you to record  
your mix.  
3. Plug new Crossfader into  
CABLE (D) and place back into mixer.  
4. Screw Crossfader to mixer with  
FADER PLATE SCREWS (B).  
D
The BOOTH OUTPUT (39) (RCA type) jacks allow you to hook up an  
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NOTE: When the DISPLAY (28) is in the channel 2/channel  
3 display mode, by adjusting the indivldual channel gain  
and tone controls, you can increase or decrease the  
signal to match the other channel’s signal. The channel  
slides and crossfader have no effect on the display  
readings.  
Your Gemini mixer comes with an RG-45 PRO (RAIL  
GLIDE™) DUAL-RAIL CROSSFADER. Rail Glide™  
Crossfaders have internal dual stainless steel rails that allow the  
slider to ride smoothly and accurately from end to end.  
)
4. CROSSFADER SECTION: The CROSSFADER (26) allows the mixing  
of one source into another. The left side of the CROSSFADER (26) is  
channel 2 and the right side is channel 3.  
11. The CROSSFADER CURVE SWITCH (42) allows you to adjust the  
kind of curve the crossfader has, Move switch to the “sharp” position to  
make the curve steep and cutting (perfect for scratching ). Move switch  
to the “gradual” position to make the curve gradual and gentle. The  
CROSSFADER REVERSE SWITCH (43) allows you to reverse the  
crossfader so that CHANNEL 3 is controlled by the left side of the  
crossfader and CHANNEL 2 is controlled by the right side of the  
crossfader.  
5. BPM DISPLAY: There are BPM DISPLAYS(23,24) for Channel 2 and  
Channel 3. They update approximately every 2.5 seconds and  
digitally display the Beats Per Minute allowing you to match the beats  
visually. BPM DISPLAY(23) reflects the Beats Per Minute of Channel  
2, and BPM DISPLAY(24) reflects the Beats Per Minute of Channel 3.  
NOTE: A [- -]reading will appear on the BPM DISPLAY if  
the track has unclear beats. The [- -]reading will also  
appear if there is no signal present.  
NOTE: When the CROSSFADER REVERSE SWITCH (32) is  
)
activated, only the crossfader reverses. The Channel  
)
Slides, Gain, and Tonal controls do not reverse.  
6. The BEAT OFFSET INDICATORS (25) light when the tracks of  
Channel 2 and Channel 3 are within 11 BPMs of each other and  
display how aligned the beats for Channel 2 and Channel 3 are.  
When the RED LEDs light, the beats are not aligned. When the  
YELLOW LEDs light, the beats are almost aligned. When the GREEN  
LED lights, the beats are aligned perfectly.  
NOTE: If the difference between the two channel’s  
beats exceed 11 BPM, the BEAT OFFSET INDICATORS will  
not light.  
)
SUGGESTION: You can use the BPM DISPLAYS to determine  
which tracks have similar or the same Beats Per Minute. When  
mixing two tracks with similar Beats Per Minute, you can use  
one source’s pitch control to align the Beats Per Minute with the  
other source’s BPM. The BPM DISPLAYS and the BEAT OFFSET  
INDICATORS update every 2.5 seconds and will reflect the  
change in BPM and indicate when the beats are aligned.  
NOTE: Beat mixing is a skill that requires practice. Not  
every track has a strong beat, and beat mixing works  
best with tracks with clear and strong beats.  
7. OUTPUT CONTROL SECTION: The level of the AMP OUT (38) is  
controlled by the MASTER (18) control. The BALANCE (17) control  
will allow the Amp Out signal to be balanced between the left and  
right speakers. The BOOTH (16) control adjusts the level of the  
BOOTH OUTPUT (39).  
HINT: BOOTH OUTPUT (39) is used by some DJs to run monitor  
speakers in the DJ Booth. You can also use it as a second  
ZONE or AMP output.  
NOTE: The RECORD OUT (40) has no level control. The level is  
set by the channel slides and the gain controls of the selected  
channel. Tonal qualities are set by the low, mid and high  
controls of that same channel.  
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 (19) button is pushed, the  
TALKOVER INDICATOR (28) will glow and the volume of all sources  
except the Mic or whatever is connected to the PHONO/LINE (36)  
input are reduced by 16 dB.  
9. CUE SECTION: By connecting a set of headphones to the  
HEADPHONE (4) jack, you can monitor any or all of the channels.  
Select the correct CUE (21) button or buttons and their respective  
CUE LED (5) indicators will glow. Use the CUE LEVEL (20) control to  
adjust the headphone volume without effecting the overall mix. By  
sliding the CUE PGM PAN (22) control to the left you will be able to  
monitor the assigned cue signal. Sliding to the right will monitor the  
PGM (program) output.  
10. DISPLAY: The peak hold, dual function DISPLAY(27) indicates either  
the MASTER(38) output left and right levels or the channel 2 and  
channel 3 levels. You can choose the option you want by pressing  
the DISPLAY(28) button.  
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SPECIFICATIONS  
I
INPUTS:  
DJ Mic.......................................................1.5mV 2 kunbalanced  
Phono @ 1 kHz..........................................................................2 mV 47 kΩ  
Line...............................................................................100 mV 27 kΩ  
OUTPUTS:  
Amp/Booth....................................................................0 dB 775mV 400Ω  
Max...............................................................................24V Peak-to-Peak  
Rec..................................................................................225mV 5 kΩ  
GENERAL:  
Bass .....................................................................+ 12dB/- 32 dB  
Mid ..........................................................................+ 12dB/- 32 dB  
Treble ..................................................................+ 12dB/- 32 dB  
Gain (Mic).......................................................................0 to -40dB  
Gain (Chnls 1-3).......................................................................0 to -20dB  
Frequency Response............................................20Hz - 20kHz +/- 2dB  
Distortion..............................................................................less than 0.02%  
S/N Ratio..........................................................................better than 80dB  
Talkover Attenuation........................................................................16dB  
Power Source...................................................115/230V 50/60Hz 20W  
Dimensions................................................254mmW x 305mmD x 112mmH  
10”W x 12”D x 4 7/16”H  
Weight........................................................................................6.5 lbs(3 Kg)  
Page 6  
 
In the USA: If you experience problems with this unit,  
call 1-732-738-9003 for Gemini Customer Service.  
Do not attempt to return this 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 this product is  
performed by Gemini Sound Products Corp. or its authorized agents.  
Gemini Sound Products Corp. will not accept liability for loss or damage  
caused by maintenance or repair performed by unauthorized personnel.  
Worldwide Headquarters • 120 Clover Place, Edison, NJ 08837 • USA  
Tel: (732) 738-9003 • Fax: (732) 738-9006  
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. • Rosello, 516, Barcelona, Spain, 08026  
Tel: 349-3435-0814 • Fax: 3493-347-6961  
© Gemini Sound Products Corp. 2002  
All Rights Reserved  
 

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