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You can also check the operation of the limiter circuit. M N MLIMITER indicator This indicator lights up when the level of the signal output from the power amp section reaches the maximum and the limiter is activated. Adjust appropriate control so that the indicator lights up for only a short while when the signal reaches the maximum level. Note: The indicator lights up or flashes for a longer duration if the power amp section is significantly overloaded, which could result in malfunction. Avoid such a situation. NPower amp select switch Select one of the following settings to specify the signals to be routed to the corresponding jacks according to the speaker connection at the SPEAKERS jacks 1 on the rear panel. • MAIN L-R The stereo (MAIN L, R) bus signals are output from the SPEAKERS A 1, 2 jacks and the SPEAKERS B 1, 2 jacks. The final level of these signals is adjusted by the MAIN MASTER control. • MAIN (L+R)-MON The MONITOR bus signals are output from the SPEAKERS B 1, 2 jacks, and a monaural signal that is a mix of the stereo (MAIN L, R) bus signals is output from the SPEAKERS A 1, 2 jacks. The final level of these signals is adjusted by the MAIN MASTER control and the MONITOR MASTER control. • MONO (BRIDGE) The monaural signal that is a mix of the stereo (MAIN L, R) bus is output from the BRIDGE jack. The final level of this signal is adjusted by the MAIN MASTER control. Set the switch to this position when you connect only a single speaker for high-volume amplification. Control panel 13 YAMAHA SPEAKER PROCESSING OON/OFF switch This switch enables you to compensate the low range of the speakers. The low range balance when this switch is on varies depending on the speakers. First, check the low range balance by auditioning the resultant sound, then set this switch to on or off. STAND-BY PON/OFF switch This switch mutes (silences) the input signals from channels 1–8 (EMX88S) or channels 1–6 (EMX68S). The indicator will blink when this switch is on. The on/off setting of this switch does not affect the signal from the AUX IN jacks or 2TR IN jacks. O P Power switch and indicator QPower ON/OFF switch and indicator This switch turns the power of the EMX88S/ EMX68S on/off. When the switch is turned on, the indicator lights up. Note: Before turning the EMX88S/EMX68S on/ off, turn down the MASTER controls of the MONITOR and MAIN section. Q EMX88S/EMX68S—Owner’s Manual 14 Front and rear panel 14 Front and rear panel l 1Channel input jacks (Hi-Z, Low-Z) 1–6 (EMX88S), 1–4 (EMX68S) These are the input jacks for channels 1–6 (EMX88S), 1–4 (EMX68S). By using the PAD switches (control panel 6) you can connect any of the jacks to a wide range of sources from mics to line level devices (synthesiz- ers or rhythm boxes etc.). The Low-Z jacks can provide +15 V phantom power, allowing you to use condenser microphones. Both Hi-Z and Low-Z are balanced, and are com- patible with microphones of output impedance 50–600. or line level devices of 600.. The nom- inal input level is from –40 dB to –10 dB for the Hi-Z jacks, and from –50 dB to –20 dB for the Low-Z jacks. Pin connections for the Hi-Z and Low-Z jacks are as follows. 2Super Hi-Z jacks These two phone jacks are the input connectors for input channel 5–6 (EMX88S), 3–4 (EMX68S). They are unbalanced, can be used simulta- neously, and their high input impedance makes them ideal for use with instruments such as elec- tric-acoustic guitar and electric bass. They can also be used with line-level sources, such as syn- thesizers and drum machines. 3Channel input jacks (MIC/LINE) 7–8 (EMX88S), 5–5 (EMX68S) These are the input jacks for channels 7–8 (EMX88S), 5–6 (EMX68S). Connect microphones to the MIC jacks. Connect line-level devices, such as synthesizers to LINE L (MONO)/R jacks if the devices are stereo sound sources. Use the LINE L (MONO) jack if the devices are monaural sound sources. The MIC jacks can provide +15 V phantom power, allow- ing you to use condenser microphones. The MIC jacks are balanced, and are compatible with microphones of output impedance 50– 600.. The LINE jacks are unbalanced, and are compati- ble with line level devices of 600. output imped- ance. Nominal input level is –50 dB for the MIC jacks and –10 dB for the LINE jacks. 2 1 65 73 4 Note: It is not possible to simultaneously use both the Hi-Z and Low-Z inputs of a given channel. For each channel, use only one of the inputs as appropriate for the input source. Phantom power is switched on/off in simulta- neously for channels 1–8 (EMX88S), 1–6 (EMX68S). For this reason, devices which do not require phantom power must be connected to the Hi-Z or LINE jacks if the PHANTOM switch (control panel L) is on. GND RS T +-GND+-Note: The MIC and LINE inputs for channel 7 (EMX88S), 5 (EMX68S) can be used simulta- neously but their levels cannot be adjusted sep- arately (Same for channel 8 (EMX88S), 6 (EMX68S).) Low-Z jacks Hi-Z jacks (XLR type) (TRS phone jacks) Pin 1: ground Sleeve: ground Pin 2: hot (+) ...
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