Gemini PDM-18 User Manual

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Introduction

Congratulations on purchasing the Gemini PDM-18 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 2 Mic Inputs

• Dual 7 Band Graphic Equalizers

• Talkover

• Master, Booth and Record outputs

• 6 sound effects

• Echo section

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.

Connections

1. Before plugging in the power cord, make sure that the VOLTAGE SELECTOR (40) 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 (33) switch is in the off position. The POWER LED (34) will be off.

3. The PDM-18 is supplied with 3 sets of amp output jacks. The MAIN OUTPUT (41) jacks are unbalanced and used to connect to your

main amplifier. The REC OUTPUT (43) jacks can be used to connect the mixer to the record input of your recorder enabling you to record your mix. The BOOTH OUTPUT (42) 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 (55) 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 (47, 50, 53) inputs and 5 stereo LINE (44, 45, 46, 49, 52) inputs. The PHONO/LINE

SWITCH (48) enables you to set the (47) input to Phono or Line. The PHONO/LINE SWITCH (51) enables you to set the (50) input to

Phono or Line. The PHONO/LINE SWITCH (54) enables you to set

the (53) input to Phono or Line. The phono inputs will accept only turntables with a magnetic cartridge. A GROUND SCREW (56) 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 (39) jack.

7. The PDM-18 comes with a front panel BNC LIGHT (32) jack. This jack is for use with a gooseneck light like the Gemini GNL-700.

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 (57) in the left position).

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

SWITCH (57). 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.

Operation

1. POWER ON: Once you have made all the equipment connections to your mixer, press the POWER SWITCH (33). The power will turn on and the POWER LED (34) will glow RED.

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.

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.

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.

6. CROSSFADER SECTION: The CROSSFADER (18) allows the mixing of one source into another. The PDM-18 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 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 with a special curve designed for scratch mixing. Just purchase one of these crossfader units from your Gemini dealer and follow these instructions:

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1. Unscrew the outside FADER PLA TE 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. EQUALIZER SECTION: This unit features dual 7 band GRAPHIC EQUALIZERS (8, 22) to allow you to adjust the sound for any room. To activate the equalizer, press the EQ BUTTON (35) (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 (22), 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 (35) again (the EQ LED will turn off).

8. OUTPUT CONTROL SECTION: The level of the MAIN OUTPUT (41) is controlled by the MASTER (24) slide. Activating the MONO (23) button (the mono LED will light) makes the overall output mono. The BOOTH (36) control adjusts the level of the BOOTH OUTPUT (42). 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 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.

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 (39) 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 (38) control to adjust the cue volume without effecting the overall mix. By moving the CUE PGM PAN (37) 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. Moving to the right will monitor the PGM (program) output.

11. DISPLAY: The DISPLAY (21) indicates the MASTER output left and right levels.

12.ECHO SECTION: Echo can be applied by pressing the ECHO (29) button (the LED will light). You can adjust the LEVEL (26), REPEAT (28) and DELAY (27) parameters of the echo by using the ECHO controls. To turn the echo off, push the ECHO (29) button again (the LED turn off).

13. SOUND EFFECTS SECTION: Six different sound effects (UFO, TRON BLAST, SIREN, GAS, MACHINE GUN and EMERGENCY) may be added to your mix by depressing the SOUND EFFECTS CONTROL BUTTONS (25). The volume of the effects can be adjusted using the EFFECTS LEVEL CONTROL (31). The pitch of the effects can be increased or decreased using the EFFECTS

SPEED CONTROL (30).

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

GENERAL:

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

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

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

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

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

Echo.................................................................................600msec

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

Dimensions..................................19”w x 4”h x 9”d (483 x 94 x 221 mm)

Weight........................................................................10.17 lbs (4.6 kg)

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