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6. Handle cables carefully Always plug and unplug cables — including the AC power cord — by gripping the connector, not the cord. 7. Clean with a soft dry cloth Never use solvents such as benzine or thinner to clean the unit. Wipe clean with a soft, dry cloth. 8. Always use the correct power supply Make sure that the power supply voltage specified on the rear panel matches your local AC mains supply. Also make sure that the AC mains supply can deliver more than enough current to handle all equipment used in your system. 9. Do not touch the heatsink when the EMX640 is in use. It can get very hot. E Front and rear panel Front and rear panel l Control panel Channel section In this section, you can adjust equalization (frequency response), volume level, effect and monitor output levels for the input signal of each channel. HIGH MID LOW MONI EFFECT LEVEL PAD 1 1 –15 +15 –15 +15 –15 +15 0 10 0 10 0 10 1 2 3 4 5 1Equalizer controls (HIGH, MID, LOW) This is a 3-band equalizer that adjusts the high frequency range, mid frequency range, and low frequency range of each channel. Response is flat when the knobs are in the position. Rotating it toward the right will boost the corresponding frequency band, and rotating it toward the left will cut it. The base frequency (or center frequency), range of boost or cut, and equalizer type of each band are as follows. HIGH: 12 kHz ±15 dB shelving type MID: 2.5 kHz ±15 dB peaking type LOW: 80 Hz ±15 dB shelving type 2Monitor controls (MONI) For each channel, this controls the amount of sig nal that is sent to the MONITOR bus. The signal of the MONITOR bus is sent to the speakers connected to the POWER AMP 2 A/B jacks (only if the power amp select switch is in the MAIN+MONITOR position) and to the MONITOR jacks (input/output panel 6). Note: The signal is sent to the MONITOR bus from a location before the level control (4) of each channel. This means that it will not be affected by the setting of the LEVEL control. 3Effect control (EFFECT) For each channel, this controls the amount of sig nal that is sent to the EFFECT bus. The signal of the EFFECT bus passes through the EFFECT section and the built-in effect, and is sent to the external effect device connected to the EFFECT OUT jacks (input/output panel 3). Note: The signal is sent to the EFFECT bus from a location after the level control (4) of each channel. This means that the amount of signal that is sent to the EFFECT bus will be affected not only by the setting of the effect control, but also by the setting of the level control. 4Level control (LEVEL) This adjusts the output level for each channel. 5Pad switch (PAD) (1~4 only) This switch attenuates the input signal by 30 dB. When connecting a line level device to channels 1~4, or if the mic input is distorted, turn this switch on (the pressed-in position). EMX640—Owner’s Manual Control panel Control panel DIGITAL EFFECT section EFFECT section This section allows you to turn the built-in digital This section allows you to adjust the level of the effect on/off and to select the effect type. signal sent from the EFFECT bus to an external effect device. DIGITAL EFFECT ON VOCAL L HALL S HALL 8 6 EFFECT OUT EFFECT 7 8EFFECT OUT control This adjusts the effect send level for an external effect device connected to the EFFECT OUT jack (input/output panel 3). 6Effect select switch Select the effect type for the built-in digital effect. Note: The EFFECT OUT control does not affect the send level to the built-in effect. 7DIGITAL EFFECT ON switch When this switch is on (pressed), the digital effect built into the EMX640 can be used. In that case, the signal processed by the digital effect will be sent to the MAIN/MONITOR bus. The mix level of the effect sound is adjusted by the EFFECT RTN control of the MAIN and MONITOR sections. EMX640—Owner’s Manual Front and rear panel Front and rear panel MONITOR section MAIN section This section allows you to adjust the tone and This section allows you to adjust the tone and volume of the MONITOR bus, and specify the volume of the MAIN bus, the mix level of the mix level of the built-in effect. built-in effect, and the mix level of the external input. 9 MASTEREFFECT RTN +6 +366 0 –566 –10 +12 • • 0 • • –12 +12 • • • • 0 –12 125 250 500 1k 2k 4k 8k B 0A MONITOR 9Graphic equalizer This is a 7-band graphic equalizer that allows you to adjust the frequency response of the MONITOR bus signal, providing a maximum of ±12 dB of cut/boost for each frequency band. You can use these sliders to reduce the level of frequency bands at which feedback easily occurs. Frequency response is flat when a slider is in the center position. Moving a slider in the positive direction will boost, and in the negative direction will cut. This graphic equalizer affects both the MONITOR bus signal that is output to the speakers and the line level signal which is output from the MONITOR jack (input/output panel 6). 0EFFECT RTN control This controls the level of the effect soun...