Gemini Musical Instrument PDM 24s User Manual

OPERATIONS MANUAL  
Bedienungsanleltung  
Manual de funcionamiento  
Manual de fonctionnement  
Manual del utente  
PDM-24s  
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  
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PHONO/LINE SWITCH (53) enables you to set the (52) input to  
Phono or Line. The PHONO/LINE SWITCH (56) enables you to set  
the (55) input to Phono or Line. The phono inputs will accept only  
turntables with a magnetic cartridge. A GROUND SCREW (58) 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.  
Introduction  
Congratulations on purchasing the Gemini PDM-24s 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.  
6. Headphones can be plugged into the front panel mounted  
HEADPHONE (40) jack.  
Features  
7. The PDM-24s comes with a front panel BNC LIGHT (33) jack. This  
jack is for use with a gooseneck light like the Gemini GNL-700.  
4 Stereo Channels  
State of the Art Cue Section  
3 Phono/Line Convertible, 5 Line, and 2 Mic Inputs  
Dual 7 Band Graphic Equalizers  
Talkover  
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.  
Master, Booth and Record outputs  
Digital Sampler with 5 Memory Banks  
Battery backup to retain samples  
1. With the mixer on, listen to the system in idle mode (no signal  
present) with the ground applied (the GROUND LIFT SWITCH (59) in  
the left position).  
Cautions  
2. Then turn the power off before moving the GROUND LIFT  
SWITCH (59). 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.  
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.  
CAUTION: DO NOT TERMINATE THE AC GROUND ON THE POWER  
MIXER IN ANY WAY. TERMINATION OF THE AC GROUND CAN BE  
HAZARDOUS.  
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.  
3. Do not expose this unit to direct sunlight or to a heat source such as  
a radiator or stove.  
Operation  
4. This unit should be cleaned only with a damp cloth. Avoid solvents or  
other cleaning detergents.  
1. POWER ON: Once you have made all the equipment connections to  
your mixer, press the POWER SWITCH (34). The power will turn on  
and the POWER LED (35) will glow RED.  
5. When moving this equipment, it should be placed in its original  
carton and packaging. This will reduce the risk of damage during  
transit.  
2. CHANNEL 1: Switch # (9) allows you to select the PHONO 1/LINE 1  
(55) or the LINE 2 (54) input. The CHANNEL SLIDE (10) controls the  
input level of this channel.  
6. DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.  
7. DO NOT USE ANY SPRAY CLEANER OR LUBRICANT ON ANY  
CONTROLS OR SWITCHES.  
3. CHANNEL 2: Switch # (11) allows you to select the PHONO 2/LINE  
3 (52) or the LINE 4 (51) input. The CHANNEL SLIDE (12) controls  
the input level of this channel.  
4. CHANNEL 3: Switch # (13) allows you to select the PHONO 3/LINE  
5 (49) or the LINE 6 (48) input. The CHANNEL SLIDE (14) controls  
the input level of this channel.  
Connections  
1. Before plugging in the power cord, make sure that the VOLTAGE  
SELECTOR (41) switch is set to the correct voltage.  
5. CHANNEL 4: Switch # (15) allows you to select the LINE 7 (47) or  
the LINE 8 (46) input. The CHANNEL SLIDE (16) controls the input  
level of this channel.  
NOTE: This product is double insulated and not intended  
to be grounded.  
6. CROSSFADER SECTION: The CROSSFADER (18) allows the  
mixing of one source into another. The PDM-24s features an  
assignable crossfader. The ASSIGN (17, 19) switches allow you to  
select which channel will play through each side of the crossfader.  
The ASSIGN (17) 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 (19) 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  
2. Make sure that the POWER (34) switch is in the off position. The  
POWER LED (35) will be off.  
3. The PDM-24s is supplied with 3 sets of amp output jacks. The MAIN  
OUTPUT (43) jacks are unbalanced and used to connect to your  
main amplifier. The REC OUTPUT (45) jacks can be used to connect  
the mixer to the record input of your recorder enabling you to record  
your mix. The BOOTH OUTPUT (44) jacks allow you to hook up an  
additional amplifier.  
CROSSFADER (18) 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  
4. The MIC 1 (1) input (found on the front panel) accepts a 1/4" or XLR  
connector. The MIC 2 (57) input (found on the rear panel) accepts  
1/4" connectors. All accept balanced and unbalanced microphones.  
5. On the rear panel are 3 stereo PHONO/LINE (49, 52, 55) inputs and  
5 stereo LINE (46, 47, 48, 51, 54) inputs. The PHONO/LINE  
SWITCH (50) enables you to set the (49) input to Phono or Line. The  
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with a special curve designed for scratch mixing. Just purchase one  
of these crossfader units from your Gemini dealer and follow these  
instructions:  
Sampler Operation  
GENERAL INFORMATION: The PDM-24s Sampler uses Dynamic RAM  
memory and a 12 bit microprocessor controller. The full bandwidth  
results in true sound reproduction.  
1. Unscrew the outside FADER PLATE SCREWS (B). Do  
not touch the INSIDE SCREWS (C).  
MEMORY INFORMATION: The PDM-24s comes equipped with five  
MEMORY BANKS (31). 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.  
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.  
SAMPLE RECORDING:  
1. Put the MODE SELECTOR (30) switch into the WRITE position.  
2. Select the source you want to sample from by pressing the  
appropriate CUE/SAMPLE ASSIGN (20, 21) button.  
3. Select the memory bank you want to record into, by pressing the  
proper MEMORY BANK (31) button.  
4. The PDM-24s comes equipped with a sampler PITCH (28) 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.  
7. EQUALIZER SECTION: This unit features dual 7 band GRAPHIC  
EQUALIZERS (8, 23) to allow you to adjust the sound for any room.  
To activate the equalizer, press the EQ BUTTON (36) (the EQ LED  
will light). By adjusting any of the 7 left equalizer slide controls (8),  
you can cut or boost the tonal characteristics of the sound coming  
from the left speaker by ±12 dB. By adjusting any of the 7 right  
equalizer slide controls (23), you can cut or boost the tonal  
characteristics of the sound coming from the right speaker by ±12  
dB. Deactivate the equalizer by pressing the EQ BUTTON (36) again  
(the EQ LED will turn off).  
HINT: You can record a sample with the PITCH (28) control in any position.  
Whatever that position is will become normal sound. If you start to record a sample  
with the PITCH (28) 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.  
5. Tapping the START/STOP (32) button begins the sampling process  
(the SAMPLER INDICATOR will illuminate RED). Tapping the  
START/STOP (32) button a second time ends the sample (the  
SAMPLER INDICATOR will turn off). If you do not tap the START/  
STOP (32) button a second time, the sampling process will stop  
automatically after 2, 4 or 12 seconds depending on which MEMORY  
BANK (31) was selected.  
8. OUTPUT CONTROL SECTION: The level of the MAIN OUTPUT (43)  
is controlled by the MASTER (25) slide. Activating the MONO (24)  
button (the mono LED will light) makes the overall output mono. The  
BOOTH (37) control adjusts the level of the BOOTH OUTPUT (44).  
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.  
SAMPLE PLAYBACK:  
1. Put the MODE SELECTOR (30) switch into the SINGLE or REPEAT  
NOTE: The REC OUTPUT (43) has no level control. The  
level is set by the channel slides of the selected channel.  
The tonal qualities can be controlled by the equalizers.  
position.  
2. Select the memory bank you wish to play by pressing the proper  
MEMORY BANK (31) button.  
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.  
3. Tapping the START/STOP (32) button with the MODE SELECTOR  
(30) switch in the SINGLE position will cause the sampler to  
playback one time (the SAMPLER INDICATOR will illuminate  
GREEN). Every push of the START/STOP (32) button will restart the  
sample from the beginning. Rapid pressing of the START/STOP (32)  
button will cause a stuttering effect. Once the sample has started  
playback and the START/STOP (32) button is not pushed a second  
time, the sample will play to the end and then stop (the SAMPLER  
INDICATOR will turn off).  
4. Tapping the START/STOP (32) button with the MODE SELECTOR  
(30) switch in the REPEAT position will cause the sample to  
continuously play over and over (the SAMPLER INDICATOR will  
illuminate GREEN). The START/STOP (32) button will act as an on/  
off switch. The first push will start the sample, the second push will  
stop it. The SAMPLER LEVEL (27) controls the level of the sample.  
10. CUE SECTION: By connecting a set of headphones to the  
HEADPHONE (40) jack, you can monitor any or all of the channels.  
Press the CUE/SAMPLE ASSIGN (21) 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 (20)  
button to monitor MIC 1 and MIC 2. The CUE/SAMPLE ASSIGN (20,  
21) buttons are also used to assign samples (see Sampler Operation  
for more details). Press the CUE SAMPLER (26) to monitor samples.  
Use the CUE LEVEL (39) 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.  
ROBO PLAY:  
1. With the ROBO PLAY (29) button in the OFF POSITION (the ROBO  
PLAY INDICATOR will be OFF) and the MODE SELECTOR (30)  
switch in either the SINGLE or REPEAT mode, pressing the START/  
STOP (32) button will cause the sample to play along with the  
selected source.  
11. DISPLAY: The DISPLAY (22) indicates either the MASTER output  
left and right levels.  
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2. When the ROBO PLAY (29) 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 PDM-24s 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 (42) 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  
PDM-24s. 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/Booth......................................................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  
GENERAL:  
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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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 011-331-5559-0470 • Fax 011-331-5559-0485  
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: 011-44-170-5591-771 • Fax: 011-44-170-5593-533  
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. 1999  
All Rights Reserved  
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