User manual ELECTRO-VOICE 619KK DATASHEET

[. . . ] Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. For US and CANADA only: Do not defeat the safety purpose of the grounding-type plug. When the provided plug does not fit into your outlet, consult an electrican for replacement of the absolete outlet. IMPORTANT SERVICE INSTRUCTIONS CAUTION: These servicing instructions are for use by qualified personnel only. To reduce the risk of electric shock, do not perform any servicing other than that contained in the Operating Instructions unless you are qualified to do so. [. . . ] If your foot switch features a LED ­ like the EV FOOT SWITCH does ­ this indicator will light when the effect is activated. FX1/FX2 1. . . . . . . 10 REVERB HALLS 11. . . . . . . 20 REVERB PLATES 21. . . . . . . 30 ECHO REVERB 31. . . . . . . 40 CHORUS REVERB 41. . . . . . . 50 DELAY STEREO 51. . . . . . . 60 DELAY MONO 61. . . . . . . 99 SPECIAL PROGRAMS 25. AUX1/2 SEND These jacks are meant for the connection of external FX units, providing the signal mixes that you have established for the AUX/FX buses ­ the identical mixes which are fed to the internal FX1/2 units. The output level is controlled using the corresponding AUX/FX SEND controls. The external devices' output signals can be send back to the PSX via the stereo return bus or by using stereo input channels. The AUX1/2 sends are designed with Ground Sensing technology to prevent the induction of external noise, even when longer cables are used. 26. UP/DOWN buttons The UP/DOWN buttons are used to select the effect presets. Keeping a button pressed constantly lets you step quickly through the program numbers. 28. FX to AUX3 These controls allow to mix the FX1/2 output signals with the AUX3 signal. In case you are using the AUX3 bus for monitoring purposes, you are able to add the FX signals at the desired level to the monitor mix. Experience in mixing has shown that the effect level in the monitor mix should be lower than the level in the main mix. AUX/FX SEND These rotary controls could also be called FX SEND master controls, since they are used to adjust the overall level of the effect mix that you have established using the channel FX send controls. AUX3 SEND This output is meant for the connection of an external FX unit, a power amplifier or active stage monitor speaker systems, when the AUX3 bus is used for monitoring purposes. Using the AUX3 fader, the output level can be adjusted over a wide range up to +20dBu. The AUX3 send is designed with Ground Sensing technology to prevent the induction of external noise, even when long cables are used. 34. FEEDBACK FILTER The feedback filter is a very narrow band notch filter which is only active over a range that is extremely susceptible to acoustical feedback. Acoustical feedback occurs when the sound system becomes the largest acoustical source at a microphone. Or in other words: the speaker signal hits the microphone and gets amplified again and again, resulting in escalating oscillation, and is audible as a high pitched whistle or loud humming sound. The following guidelines are meant to assist you in avoiding feedback and you should take them into consideration even before you activate the feedback filter. Also consider the microphones' different polar patterns and characteristics, when placing the monitor speakers. Do not turn up the monitor system's volume higher than really necessary. Try to avoid extensive equalization on channels that you want to include in your monitor mix. Keep in mind, that microphones "behave" different when somebody stands right in front of them. [. . . ] Maximum amount of speakers in a passive configuration: The PSX allows connection of up to three loudspeaker cabinets with an impedance of 8 ohms per channel. In other words: the internal power amplifier is capable of driving a maximum of six 8 ohm speaker models. The following diagram shows how the speakers have to be connected. 6. Active stereo 2-way configuration: In this example the internal power amplifier of the PSX is used to drive the Hi/Mid cabinets. [. . . ]