Assessments - 3, GPA: 3.7
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Facilidade de uso
This output can be used to feed the external monitor system. The output impedance is 150 ohms and the nominal output level is +4 dB. • © LINE OUT jack The LINE OUT jack delivers the main program signal at line level (+4 dB). The signal is derived prior to the graphic equalizer and is not affected by the graphic equalizer settings. The LINE OUT jack can be used to feed external power amplifiers, tape recorders, or any other device which accepts line-level input. The 1/4" phone jack (unbalanced) has an output impedance of 150 ohms. ® EFF SEND jack The signal adjusted by the EFFECTS SEND control is delivered to this 1/4” phone jack (unbalanced). Its output impedance is 600 ohms and the nominal output level is -10 dB. ® EFF RTN jacks The output from an external signal processing device fed by the EFF SEND output can be returned to the main program and monitor signals via the EFF RTN jacks. These 1/4" phone jacks (unbalanced) have an input impedance of 10 kohms and a -20 dB nominal input level. © REC OUT jacks The REC OUT RCA pin jacks deliver a -10 dB line-level signal which has not been affected by the MASTER level control. The REC OUT signals can be fed to a tape or cassette recorder for convenient recording of the main program. The jacks have an output impedance of 600 ohms. © TAPE IN jacks These -10 dB RCA pin jack inputs are ideal for receiving the signals from tape recorders or any other line-level sources. The TAPE IN jacks have an input impedance of 10 kohms. OPERATING TIPS CONNECTING SOURCES SOUND LEVEL BALANCE AND CONTROL INPUT MIC -45dB * MAKE SURE THE MIXER'S POWER SWITCH IS OFF WHEN CONNECTING OR DISCONNECTING ANY CABLES. * ALWAYS TURN THE MIXER'S POWER ON AF^ TER TURNING ON CONNECTED SOURCES SUCH AS ELECTRONIC INSTRUMENTS, ETC. CONNECTING SPEAKERS The EM1620 powered mixers have two 1/4" phone jack speaker outputs which are internally connected in parallel. This place some restrictions on their use. * IF YOU CONNECT SPEAKER SYSTEMS TO ONLY ONE OF THE AVAILABLE SPEAKER OUTPUTS, THE TOTAL IMPEDANCE OF THE CONNECTED SPEAKER SYSTEM MAY BE NO LESS THAN 4 OHMS. * IF YOU CONNECT SPEAKER SYSTEMS TO BOTH OF THE AVAILABLE SPEAKER OUTPUTS, THE TOTAL IMPEDANCE OF THE SPEAKER SYSTEM CONNECTED TO EACH OUTPUT MAY BE NO LESS THAN 8 OHMS (equalling a total of 4 ohms). While a higher total load impedance than the recommended impedance will only result in a loss of power output, a total load impedance that is too low can actually damage the powered mixer. With a total load impedance of 8 ohms, the maximum output power of EM1620 mixers is 120 watts. With a total load impedance of 4 ohms, maximum output power is 200 watts. * NEVER CONNECT OR DISCONNECT SPEAKERS WHILE THE MIXER'S POWER IS TURNED ON!! Before turning ON the mixer AC power switch, connect all inputs, outputs, and speakers, and be sure the monitor control is at “0”. If other electronic equipment or electronic instruments are connected to the inputs of the EM1620, turn ON that equipment before turning on the mixer. This will not only avoid annoying hum, it will also prevent power-on transients from damaging speakers or other equipment. To obtain a good S/N ratio with little noise and wide dynamic range, it is important to establish a proper balance between each channel VOLUME control and the MASTER control. Generally speaking, to set the volume of the signal at SP OUT and to obtain a good S/N ratio, the channel VOLUME control should be set as higher as possible and the MASTER control should be set low. However, if the channel VOLUME is set too high, the signal will clip, and the sound will become distorted. Initially, set the channel VOLUME controls to “0”, and the MASTER control to about “3”. Increase channel volumes one at a time until the desired mix balance is achieved; the VOLUME control of the channel with the lowest signal level should be set somewhere between “8” and “9”. At this point, if the overall volume is too high or too low, readjust the MASTER volume accordingly. The same considerations apply to the MONITOR output. Although the LIMITER circuitry is capable of handling reasonable signal overranges without distortion, excessively large power signals will be distorted. The best policy for stable signal output is to keep the volume turned down to avoid situations that activate the limiter circuitry. 6 CHANNEL EQ GRAPHIC EQUALIZATION The HIGH, MID and LOW equalization controls on each channel of the mixer make it possible to independently equalize the channel signals to some degree. The basic rule of thumb is that equalization should NOT be used unless it is absolutely necessary. Always put some effort into proper microphone selection, careful microphone placement, and/or setting of source instrument controls to achieve the desired sound before resorting to equalization. When you've set everything up as best you can, but still need to modify a sound, then go ahead and equalize. Channel EQ can be most useful in tonally ...