Introduction Using the Ground Lift Switch

Introduction

Using the Ground Lift Switch

Congratulations on purchasing the Gemini BPM-150 mixer. This state of the art mixer includes the latest features and is backed by a three year limited warranty, excluding crossfader and channel slides. Prior to use, we suggest that you carefully read all the instructions.

Features

•2 Stereo channels

•2 Phono/Line Convertible, 1 Phono, 1 Line and 1 Mic input

•1/4" DJ Mic jack

•Low, Mid, High and Gain controls on each channel

•Master output control

•Cue 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 1-732-969-9000 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.

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 (2) 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 (1) switch is in the off position.

3.The BPM-150 is supplied with 2 sets of output jacks. The OUTPUT AMP (3) jacks are used to connect to your main amplifier. The OUTPUT REC (5) jacks can be used to connect the mixer to the record input of your recorder enabling you to record your mix.

4.The DJ MIC (26) input (found on the front panel) accepts a 1/4" connector and balanced and unbalanced microphones.

5.On the rear panel are 2 stereo PHONO/LINE (7, 11) inputs, 1 stereo PHONO (12) input and 1 stereo LINE (6) input. The PHONO/LINE SWITCHES (8, 10) enable you to set the (7, 11) inputs to Phono or Line. The phono inputs will accept only turntables with a magnetic cartridge. A GROUND SCREW (9) 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 (38) jack.

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 (4) in the left position).

2.Then turn the power off before moving the GROUND LIFT SWITCH (4). 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 (1) switch.

2.CHANNEL 1: The GAIN (13), HIGH (20), MID (21), and LOW (22) controls allow you to fully adjust the selected source. Switch # (23) allows you to select either the PHONO 1 (12) or the PHONO 2/LINE 1

(11)input. The CHANNEL SLIDE (24) controls the output level of this channel.

3.CHANNEL 2: The GAIN (39), HIGH (32), MID (33), and LOW (34) controls allow you to fully adjust the selected source. Switch # (35) allows you to select either the PHONO 3/LINE 2 (7) or the LINE 3 (6) input. The CHANNEL SLIDE (36) controls the output level of this channel.

NOTE: There is Low, Mid and High equalization for each channel with an extremely wide range of adjustment giving you a smoother mix.

SUGGESTION: You can use the Cut Features on each channel to remove Low, Mid and/or High to create special effects.

4.CROSSFADER SECTION: The CROSSFADER (31) allows the mixing of one source into another. The left side of the CROSSFADER (31) is CHANNEL 1 and the right side is CHANNEL 2. The CROSSFADER (31) 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:

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.

4.Screw the fader to the mixer.

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BPM-150 specifications

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