User manual RANE PE 15

[. . . ] POWER indicator: When this yellow LED is lit, the unit is ready to serve. OVERLOAD indicator: illuminates red whenever the signal level at the Input, Output, or any of the five equalizer stages comes within 3-4 dB of clipping. MASTER LEVEL control: Full counterclockwise rotation of this control provides full Input attenuation; full clockwise rotation yields 20 dB of gain through the unit. [. . . ] Try combinations of lifting grounds on units that are supplied with ground lift switches or links. If your equipment is in a rack, verify that all chassis are tied to a good earth ground, either through the line cord grounding pin or the rack screws to another grounded chassis. Units with outboard power supplies do NOT ground the chassis through the line cord. Make sure that these units are grounded either to another chassis which is earth grounded, or directly to the grounding screw on an AC outlet cover by means of a wire connected to a screw on the chassis with a star washer to guarantee proper contact. Please refer to RaneNote 110, "Sound System Interconnection" elsewhere in this manual for further information on system grounding. Manual-3 PE 15 CONNECTION The PE 15 is compatible with all line-level (-10 dBV and +4 dBu) interfaces and products. However, guitars, microphones and other low level products must be preamplified before connecting to the PE 15. The proper connection of this unit to a system is a relatively simple matter, the specifics of which may vary greatly depending on the application. This includes live sound reinforcement systems, recording studios, clubs, etc. The most common location to insert a parametric equalizer is immediately preceding the active crossover or power amplifier. This provides the means to correct loudspeaker deficiencies and other acoustic corrections required in any system for high quality reproduction. Many systems employ both a graphic and parametric equalizer connected in series. The graphic being used to correct for acoustic anomalies, while the parametric helps source correction, loudspeaker compensation and feedback control. In these situations, the order of placement is not critical, however the PE 15 does feature true actively balanced differential outputs which may be a consideration in installations requiring very long cable runs between the equalizers and the power amplifiers or crossovers. The ¼" TRS and XLR INPUT connectors are wired in parallel and are actively balanced. These Inputs are provided primarily to give the user a choice between two types of connectors. For further information on this subject, please consult the RaneNote titled, "WHY NOT WYE?" (available from the factory or the Rane web site). The two Inputs may be used in a daisy chain application where the Input to the PE 15 also must feed another piece of equipment. The outputs of the PE 15 also provide the choice between ¼" TRS connectors and XLR variety. [. . . ] Once you have achieved stability, advance the MASTER CONTROL until the feedback starts to reappear, then back it down slightly. If a -20 dB cut won't cure the problem, the resonance is extreme and must be dealt with in other ways. For example, move the speakers or the mics; hang some drapes; move some walls; burn down the building; or simply unplug the system-- something must give! [. . . ]