Carvin CX842 Instruction Manual - Page 6

to be plugged into the snake or directly into the "LINE" input of the mixer. This can be accomplished by a high to low impedance adapter or a "Direct box" (both are available from Carvin or other electronics outlets). Verify that all the connections are good and that all mics are connected properly. The next step is connecting the speakers outputs. 4. POWERED AND NON-POWERED MIXER OUTPUTS With powered mixers (i.e. mixers with built in power amplifiers) the LEFT and RIGHT amplifier outputs can NOT be feed through the snake to power the speakers on stage. Doing this could result in damage to the mixer's internal power amp. Only 'Pre-amp' signals can be returned to the stage through the snake. Since speaker level signals cannot be sent through the snake separate speaker cables must be used. These speaker cables will carry the signal from the mixer's power amp outputs directly to the speakers. With non-powered mixers use the MAIN L/R LINE OUT jacks as the main preamp outputs to drive external power amplifiers. The same snake that was used to feed the signals from the stage to the mixer usually has provisions for sending line output signals from the mixer to the stage. The (pre-amp level) MAIN L/R LINE OUT outputs on the front of the mixer may be plugged into the snake cable. This will send the signal to the power amplifiers, usually placed on stage. Once the snake, or alternate means of cabling, carrying the signal has reached the stage, the connections are made to the power amplifiers. The power amp outputs can then be connected to the speakers, using 16 gauge (AWG) or heavier non-shielded wire. Note: Speaker cables are the only ones that should NOT be shielded. All other cables that carry 'Mic' and 'Pre-amp' level signals should be shielded. Shielded cables connected to the power amp outputs can damage the power amplifier. 5. CONNECTING THE MONITOR AMPS AND SPEAKERS In a typical setup for live sound the MONITOR LINE OUT will be used to provide a monitor mix for the musicians on stage. The MONITOR LINE OUT output signal will be sent to the stage just like the main output signals. The signal is sent to the stage either by using a direct shielded wire from mixer output or by using the snake. The signal can now be plugged into the inputs of the power amplifiers that will be powering the monitor speakers. 6. TESTING THE MAIN SPEAKERS It is best to start a new mix with the mixer set as follows: all the channel level and monitor knobs turned down and the master main level, and master monitor level turned down (counterclockwise or off). Also it is easier to start with the channel tone controls turned to their center positions. This way when the system is turned on and the master is first turned up there will not be any surprises such as feedback from a microphone or loud signals coming from a channel that was turned up loud. With the mixer set the main master level can be turned up to a low level (2 or 3 on the dial). Then a channel with signal can be turned up until it is heard in the speakers. If no signal is heard from the speakers and the channel volume is up full, lower the channel volume and check the connections. It may be the signal source was not plugged in correctly, so try another source. Also it may be the connections to the speakers or external amplifiers. When the prob- 11 INTERNAL DSP EFFECTS SELECTING AN EFFECTS PROGRAM (EFFECT) To select a program use the up or down buttons to scroll to the desired program number. If you press and hold either button, after a couple sec- STEREO DSP onds the scrolling rate will increase ten times. When you are close to the desired number stop pressing the button and step through the last few program numbers to your 127 EFFECTS BYPASS DELAYS REVERB CHORUS 1 2 - 30 31 - 90 91 - 110 desired program. The scroll rate FLANGE 111 - 128 automatically returns to the slow speed when the button is not pressed and held. The last program number select-ed will be saved in non-volatile memory when power is removed. You do need to wait approximately 30 seconds after chang- ing the program number before removing power for that number to be saved. Under normal use this will not be a factor because you will be using the program selected before removing power. Note: If both up and down buttons are pressed together, the display will change and show C01 telling you the MIDI channel is 1. This feature is not used in the CX mixer series. If this appears, leave the buttons alone for approximately 10 seconds and the display will change back to the last program number used. SETTING AUDIO LEVELS Turn all channel EFF/REV level controls to the off position (fully counter clockwise). Set the DSP EFF RTN level to 5. Then turn up the channel EFF/REV level control of the desired channels until the effect level is heard in the stereo mix. If clipping is heard in the effects, reduce the channel EFF/REV level control until the clipping is gone. Finally, readjust the DSP EFF RTN level to vary the amount of effect needed in the stereo mix. A LITTLE ABOUT THE PRESET PROGRAMS Bypass: [1] No effect is created. This is used so the effect levels can remain set even though no effect is wanted at that time. Delays: [2-30] The delays range from 30mS to 550mS delays with various feedback settings from 0 to infinity. Some include a stereo bouncing effect between the left and right outputs. Reverbs: [31-60] These natural sounding reverberation effects range from a short plate reverb to simulating reverberation heard in a cathedral. Reverbs + Delay: [61-90]These are combinations of the two above effects with variations in the amount of pre-delay and echo density. Chorus: [91-110] These are two to six voice stereo choruses, which vary in delay time, number of echoes, speed and recirculation. Some have reverb. Flange: [111-128] These are stereo flangers with variations of depth, delay and speed. Some are followed by a short reverb. 8