User manual CARVIN MX842

[. . . ] CHANNEL MONITOR LEVEL - These controls send signals to the master MONITOR control (#13). Connect a separate power amp to the drive monitor speakers (via the 1/4" MONITOR jack on the front panel). The channel monitor control is "pre fader"-- not affected by the channel LEVEL control. Typically stage monitors are right next to the microphones where they are most susceptible to feedback. 6. [. . . ] With the sliders at this position, there is no effect on the audio signal. When you raise the slider above the center position, you boost levels in a narrow frequency band. When using these sliders, think of them as volume controls that can add or subtract tones in narrow frequency bands. Frequency: The 63 Hz slider is for deep sub bass level adjustments, the 125 Hz is for higher bass adjustments, the 250, 500 and 1K Hz is for mid and higher mid tone adjustments, the 2K and 4K Hz is for mid treble adjustments, and the 8K and 16K Hz sliders add to the very high treble. NOTE: It is recommended that all sliders be set in their center position before equalizing your tone. Typically low frequency feedback is in the 125 and 250 Hz range while high feedback is in the 2k and 4k Hz range. Occasionally you may have to turn one frequency (slider) off to -12dB to help stop feedback. Instead, set the adjacent sliders to -6dB to form a gentle negative curve. Likewise, if you need more deep bass, boost the 63 Hz by 10 dB and the 125Hz by 5 dB. Or, if you need more treble, boost the 8k by 6 dB and the 16k Hz by 4 dB. Note--there is not much signal at 16k so you may not hear any difference except for added noise. If you raise or lower all sliders at the same time, the EQ will act like a volume control because you are effecting all frequencies. Take care not to overadjust as this will drastically alter your over-all sound. Use the EQ in addition to proper microphone and speaker placement for the control of feedback. GRAPHIC EQ IN/OUT SWITCH - To use the graphic equalizer, the EQ switch must be in the IN position. The red LED will indicate that it is turned on. 14 13 VEL dB 10 0 LEVEL 10 0 LEVEL 10 0 10 MONITOR L/R MON PROTECT 5 LINE OUT L/R MONITOR EFF SND L/R EFF RTN 1 -20 dB LINE -20 dB LINE TAPE IN L TAPE IN R TAPE OUT L TAPE OUT R 18 6 MIC 7 MIC 8 A AMP PATCH B AMP MONO OUT L/R EFF RTN 2 0 10 MASTER 13 10 9 11 12 19 15 20 16 9. POWER "LED" - The power LED indicates when the MX842 is powered up. MASTER LEVEL - The MASTER level is a stereo control directing the L & R signals of the mixer into the built-in stereo power AMP 1 "Left" & AMP 2 "Right". NOTE: This control should be set equal or higher than the channel settings to prevent over-driving the previous stages. MASTER "PROTECT" LED - The master PROTECT LED indicates that the internal relays have disengaged the amplifiers from the speaker output jacks on the rear panel. L/R --MONITOR SWITCH - You can use the main speaker output of MX842 in "STEREO" or "MONO" mode. If used in the MONO mode (by pushing the L/R MON switch in), AMP 1 is routed to the MONITOR control allowing you to drive your monitor speakers. [. . . ] The fuse can be changed by removing the AC cord and wedging a slothead screwdriver under the top to pull out the fuse holder. Once out, the fuse can be replaced (there is room for a spare fuse in the tunnel). NOTE: 120 volt fuses are available from Radio Shack: Part No 270-1175 for a 5 Amp slow-blow fuse for 120 volt use and 2. 5 Amp for 220 volt use. 120/240 VOLT SWITCH - Check and change if necessary the rear AC Voltage Switch to the proper voltage. [. . . ]