OPERATIONS MANUAL
Bedienungsanleltung
Manual de funcionamiento
Manual de fonctionnement
Manual del utente
BPM-500
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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63
65
56
58
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used to connect the mixer to the record input of your recorder enabling
you to record your mix. The BOOTH OUTPUT (47) jacks allow you to
hook up an additional amplifier.
Introduction
Congratulations on purchasing the Gemini BPM-500 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.
4. The MIC 1 (1) input (found on the front panel) accepts a 1/4" or XLR
connector. The MIC 2 (63) input and the MIC 3 (53) 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 (55, 59, 62) inputs and 5
stereo LINE (51, 52, 54, 57, 60) inputs. The PHONO/LINE SWITCH
(56) enables you to set the (55) input to Phono or Line. The PHONO/
LINE SWITCH (58) enables you to set the (59) input to Phono or Line.
The PHONO/LINE SWITCH (61) enables you to set the (62) input to
Phono or Line. The phono inputs will accept only turntables with a
magnetic cartridge. A GROUND SCREW (64) 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.
Features
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4 Stereo Channels
State of the Art Cue Section
3 Phono/Line Convertible, 5 Line, and 3 Mic Inputs
BPM Displays and Beat Offset Indicators
Cut Feature for Low, Mid and High for each channel
Gain, High, Mid and Low tone controls for each channel
Talkover
6. Headphones can be plugged into the front panel mounted
HEADPHONE (43) jack.
7. The BPM-500 comes with a front panel BNC LIGHT (37) jack. This
jack is for use with a gooseneck light like the Gemini GNL-700.
Loop
8. There are LOOP INPUTS (50) and LOOP OUTPUTS (49) located on
the rear panel. If you are using an outboard signal processor, you can
use the LOOP OUTPUTS (49) to send the signal to the device and the
LOOP INPUTS (50) 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.
Balanced and Unbalanced Master Outputs
Booth and Record outputs
Dual mode display
Cautions
Using the Ground Lift Switch
1. All operating instructions should be read before using this equipment.
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.
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.
1. With the mixer on, listen to the system in idle mode (no signal present)
with the ground applied (the GROUND LIFT SWITCH (65) in the left
position).
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.
2. Then turn the power off before moving the GROUND LIFT SWITCH
(65). 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.
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.
CAUTION: DO NOT TERMINATE THE AC GROUND ON THE POWER
MIXER IN ANY WAY. TERMINATION OF THE AC GROUND CAN BE
HAZARDOUS.
6. DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.
7. DO NOT USE ANY SPRAY CLEANER OR LUBRICANT ON ANY
CONTROLS OR SWITCHES.
Operation
Connections
1. POWER ON: Once you have made all the equipment connections to
your mixer, press the POWER SWITCH (39). The power will turn on and
the POWER LED (38) will glow RED.
1. Before plugging in the power cord, make sure that the VOLTAGE
SELECTOR (44) switch is set to the correct voltage.
2. CHANNEL 1: The GAIN (8), HIGH (9), MID (10), and LOW (11)
controls allow you to fully adjust the selected source. Switch # (12)
allows you to select the PHONO 1/LINE 1 (62) or the LINE 2 (60)
input. The CHANNEL SLIDE (13) controls the input level of this
channel.
NOTE: This product is double insulated and not intended to
be grounded.
2. Make sure that the POWER (39) switch is in the off position. The
POWER LED (38) will be off.
3. CHANNEL 2: The GAIN (8), HIGH (9), MID (10), and LOW (11)
controls allow you to fully adjust the selected source. Switch # (14)
allows you to select the PHONO 2/LINE 3 (59) or the LINE 4 (57) input.
The CHANNEL SLIDE (15) controls the input level of this channel.
3. The BPM-500 is supplied with 4 sets of amp output jacks. The
BALANCED OUTPUT (45) 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 (46) jacks are unbalanced and used to
connect to your main amplifier. The REC OUTPUT (48) jacks can be
4. CHANNEL 3: The GAIN (8), HIGH (9), MID (10), and LOW (11)
controls allow you to fully adjust the selected source. Switch # (16)
allows you to select the PHONO 3/LINE 5 (55) or the LINE 6 (54) input.
The CHANNEL SLIDE (17) controls the input level of this channel.
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5. CHANNEL 4: The GAIN (8), HIGH (9), MID (10), and LOW (11)
controls allow you to fully adjust the selected source. Switch # (18)
allows you to select the LINE 7 (52), LINE 8 (51) or the MIC 3 (53)
input. The CHANNEL SLIDE (19) controls the input level of this
channel.
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: There is Low, Mid and High equalization for each
channel with an extremely wide range of adjustment.
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.
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 (26) allows the mixing
of one source into another. The BPM-500 features an assignable
crossfader. The ASSIGN (23, 28) switches allow you to select which
channel will play through each side of the crossfader. The ASSIGN (23)
switch has 4 settings (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 (28)
switch has 4 settings (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. There are two OFF
(22, 30) buttons for the crossfader. When the OFF (22) button is
pressed, the left side of the crossfader will be inactive and the OFF
LED (21) will light. When the OFF (30) button is pressed, the right side
of the crossfader will be inactive and the OFF LED (29) will light. Using
the OFF button, be sure to deactivate the crossfader before changing
the ASSIGN setting. This will avoid any click or popping sound in your
signal while you are changing the assign setting. The CROSSFADER
(26) 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:
9. LOOP SECTION: Removing the jumpers from the LOOP OUTPUT (49)
and LOOP INPUT (50) jacks will activate the loop. Any device
connected to the LOOP OUTPUT (49) and LOOP INPUT (50) jacks will
be inserted into the signal path.
10. OUTPUT CONTROL SECTION: The level of the AMP OUT (45, 46) is
controlled by the MASTER (35) slide. Activating the MONO (33) button
(the mono LED will light) makes the overall output mono. The BOOTH
(36) control adjusts the level of the BOOTH OUTPUT (47). 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 (48) 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.
11. 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.
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.
12. CUE SECTION: By connecting a set of headphones to the
HEADPHONE (43) jack, you can monitor any or all of the channels.
Press the CUE ASSIGN (20) buttons for channels 1 - 4 to select the
channel or channels to be monitored and their respective LED
indicators will glow. Use the CUE LEVEL (40) control to adjust the cue
volume without effecting the overall mix. By moving the CUE PGM PAN
(42) 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 (41) 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.
4. Screw the fader to the mixer.
13. DISPLAY: The peak hold, dual function DISPLAY (31) indicates either
the MASTER (45, 46) output left and right levels OR the the selected
cue and program (premaster output) levels. You can choose the option
you want by pressing the DISPLAY (32) button.
7. BPM DISPLAY: There are BPM DISPLAYS (24, 27) for the two
channels assigned to each side of the CROSSFADER (26). They
update approximately every 2.5 seconds and digitally display the Beats
Per Minute allowing you to match the beats visually. BPM DISPLAY
(24) reflects the Beats Per Minute of the channel assigned to the left
side of the CROSSFADER, and BPM DISPLAY (27) reflects the Beats
Per Minute of the channel assigned to the right side of the
CROSSFADER.
NOTE: When the DISPLAY (31) is in the cue/program mode,
by adjusting GAIN (8), you can increase or decrease the
signal to match the other channel’s signal.
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.
8. The BEAT OFFSET INDICATORS (25) light when the tracks of the two
channels assigned to the crossfader are within 11 BPMs of each other
and display how aligned the beats of the two channels 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 diffence between the two channel’s beats
exceed 11 BPM, the BEAT OFFSET INDICATORS will not
light.
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Specifications
INPUTS:
DJ Mic....................................................1.5mV 2Kohm balanced
Phono.........................................................................3mV 47Kohm
Line.......................................................................150 mV 27Kohm
OUTPUTS:
Amp/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
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 20W
Dimensions...........................................19”w x 4”h x 9”d (483 x 94 x 221 mm)
Weight........................................................................10.2 lbs (4.6 kg)
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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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