User manual YAMAHA EMX 640

[. . . ] POWERED MIXER Owner's Manual Introduction Thank you for purchasing the Yamaha EMX640 Powered Mixer. In order to take full advantage of the EMX640 and enjoy long and trouble-free performance, please read this owner's manual carefully, and keep it in a safe place for future reference. Features · Six input channels compatible with mic/line signals are provided. The EMX640 has ample power, with a maximum output of 200 W+200 W (400 W with bridge connection), and is suitable for a wide range of applications from installed systems to small-scale PA systems. · A two-channel power amp is built-in. [. . . ] This graphic equalizer affects both the MAIN bus signal that is output to the speakers and the line level signal which is output from the MAIN jack (input/output panel 6). D EFFECT RTN control This adjusts the level of the effect signal which is returned from the built-in digital effect to the MAIN bus. 0 EFFECT RTN control This controls the level of the effect sound which is returned from the built-in digital effect to the MONITOR bus. E AUX IN control This adjusts the amount of signal that is sent from the AUX IN jack to the MAIN bus. F TAPE IN This adjusts the amount of signal that is sent from the TAPE IN jacks to the MAIN bus. A MASTER control This adjusts the final level of the MONITOR bus. It affects both the MONITOR bus signal which is output to the speakers and the line level signal which is output to the MONITOR jack (input/ output panel 6). G MASTER control This adjusts the final level of the MAIN bus. It affects both the MAIN bus signal which is output from the speakers, and the line level signal which is output from the MAIN jack (input/output panel 6). B Peak level indicator This indicator allows you to monitor the level of the signal which is output from the MONITOR jack (input/output panel 6). Note: To avoid distortion, adjust the MASTER control (A) so that the 0 indicator lights occasionally. H Peak level indicator This indicator allows you to monitor the level of the signal which is output from the MAIN jack (input/output panel 6). Note: To avoid distortion, adjust the MASTER control (G) so that the 0 indicator lights occasionally. EMX640--Owner's Manual Control panel 5 s POWER AMP section This section allows you to select the signals that will be output from the built-in two-channel power amplifier, and to select the BRIDGE mode. s POWER indicator & PHANTOM switch I 1 LIMITER K 2 ON OFF POWER PHANTOM +48V L MAIN BRIDGE MAIN MAIN MAIN MONITOR J POWER AMP K POWER indicator This indicator will light when the power of the EMX640 is turned on. I LIMITER 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. L PHANTOM +48 V switch This switch turns the phantom power supply on/ off for the Lo-Z input jacks of channels 1~4 and MIC input jacks of channels 5~6. J Power amp select switch Select one of the following three settings to specify the signals that will be output from power amp 1/2. · MAIN-MONITOR With this setting, the MAIN and MONITOR sections can be used independently. The MAIN bus signal will be output from the POWER AMP 1 A/ B jacks, and the MONITOR bus signal will be output from the POWER AMP 2 A/B jacks. · MAIN-MAIN With this setting, the two power amp channels can be used independently. The MAIN bus signal will be output from the POWER AMP 1 A/B jacks and from the POWER AMP 2 A/B jacks. · MAIN BRIDGE With this setting, the two power amp channels (A and B) will be bridge connected. If a foot switch is connected to this jack, you can use your foot to switch the built-in digital effect on/off. The Digital Effect ON switch on the front panel must be set to ON in order to use a foot switch. 5 External input jacks (AUX IN/TAPE IN) These are input jacks that allow the signal from an external device to be added to the MAIN output. Monaural output devices such as external effects can be connected to the AUX IN jack, and stereo output devices such as cassette recorder or CD players can be connected to the TAPE IN jacks. EMX640--Owner's Manual Rear panel 7 The nominal input level and impedance are ­ 10 dB/600 for the AUX IN jack, and ­10 dBV/ 600 for the TAPE IN jacks. · REC OUT jacks: The MAIN bus signal before it has passed through the MASTER control and graphic equalizer · MONITOR jack: The MONITOR bus signal which has passed through the Monitor MASTER control and graphic equalizer · MAIN jack: The MAIN bus signal which has passed through the Main MASTER control and graphic equalizer The nominal output level and impedance are ­ 10 dBV/10 k for the REC OUT jacks, and +4 dB/10 k for the MONITOR/MAIN jacks. 6 External output jacks (REC OUT/MONITOR/MAIN) These are output jacks which send line level signals from the EMX640 to external devices. A stereo recording device such as a cassette recorder or MD recorder can be connected to the REC OUT jacks, and a playback device such a power amp can be connected to the MONITOR and MAIN jacks. The signals sent from each jack are as follows. Rear panel 1 B A SPEAKERS B A POWER AMP 2 BRIDGE POWER AMP 1 POWER 2 ON / OFF 1 Speaker output jacks (POWER AMP 1 A/B, POWER AMP 2 A/B, BRIDGE) Speakers can be connected to these jacks. The EMX640 contains a two-channel power amp, and the two channels can be used independently (maximum output 200 W+200 W) or in bridge connection (maximum output 400 W). If the two channels are used independently, two speakers can be connected to the POWER AMP 1 A/B jacks and two more to the POWER AMP 2 A/ B jacks, for a total of four speakers. If the two channels are used in a bridge connection, only one speaker can be connected to the BRIDGE jack. If you wish to use the two channels independently, but only connect a speaker to the A jack or B jack, use a 4~8 speaker. [. . . ] Sensitivity is the lowest level that can produce an output of +4 dB (1. 23 V) or the nominal output level when the unit is set at maximum gain. (All level controls are at maximum position. ) · CH INPUT and MIC INPUT connectors are balanced and others are unbalanced. · 0 dB=0. 775 Vrms, 0 dBV=1 Vrms. s Output specifications Output connectors Actual source impedance 0. 1 0. 1 600 600 600 600 Nominal impedance 4/8 Speaker 8 Speaker 10 k Lines 10 k Lines 10 k Lines 10 k Lines Output level Connector type Nominal 37. 7 W/4 75. 4 W/8 +4 dB (1. 23 V) +4 dB (1. 23 V) +4 dB (1. 23 V) ­10 dBV (316 mV) Max. before cliping POWER AMP OUT (1·2) (A, B) BRIDGE OUT MAIN OUT MONITOR OUT EFFECT OUT REC OUT (1, 2) · All output jacks are unbalanced. [. . . ]