User manual RANE FPE 13

[. . . ] Never connect anything except AN APPROVED RANE POWER SUPPLY TO THE THING THAT LOOKS LIKE A TELEPHONE JACK ON THE REAR OF THE FPE 13. This is an AC input and requires special attention if you do not have an operational power supply exactly like the one that was originally packed with your unit. See the full explanation of the power supply requirements elsewhere in this manual. FPE 13 PARAMETRIC EQUALIZER SYSTEM CONNECTION When connecting the FPE 13 to other components in your system for the first time, leave the power supply for last. This will give you a chance to make mistakes and correct them before any damage is done to your fragile speakers, ears and nerves. [. . . ] . 03 octave (1/30 octave) will yield the narrowest coverage. Bandwidths this narrow are normally reserved for notch feedback control. Higher settings yield smoother curves and are convenient for program sweetening and acoustic compensation. This yellow LED illuminates any time power is supplied to the FPE 13 from a Rane RS 1 or VC 18 single power supply, RAP 10 or FRS 8 multiple power supply. Other power sources could conceivably cause illumination of the LED and several ICs and resistors inside. REAR PANEL DESCRIPTION 1. Pin 2 is positive, pin 3 is negative and pin 1 is signal ground. For unbalanced operation, use pin 2 as hot and pin 1 as return. This ¼" TRS connector parallels the 3-pin connector described in item 1. Tip is positive, Ring is negative and Sleeve is signal ground. The +, ­ , and COMMON GND terminals parallel the respective pins in the 3-pin and ¼" connectors. Used for primary Inputs and Outputs or additional patch connections. This ¼" TRS connector parallels the 3-pin connector exposed in item 5 below. As before, Tip is hot, Ring is not and Sleeve is signal ground. Pin 2 is positive, pin 3 is negative and pin 1 is signal ground. For unbalanced operation, do not short any pins to any others. Active balanced outputs operated in the unbalanced mode use only pin 2 driving the line and pin 1 acting as the return. Grounding pin 3 will not cause any damage nor will it impair the sound. It only creates extra work for your audio electrons and is unnecessary. This ¼" TRS jack provides an unbalanced I (Input) on its tip and an unbalanced O (Output) on its ring. Designed for use with tip=send/ring=return effect loop inserts found on many mixing consoles. This provides an easy means for patching the unit into effect loops as painlessly as possible, using a single ¼" TRS stereo patch cable. CAUTION: Use either the PATCH I/O or any of the INPUT and OUTPUT connectors--Do not use both at the same time. [. . . ] With the range switches you may position all three bands of the equalizer to overlap to remove any acoustic resonances causing you grief. As luck would have it, the top few nodes are usually grouped in such a way that you can't get them all with a conventional parametric. With the FPE 13's overlapping bands, you never have this problem. A good way to find them is to set the bandwidth for about 1/2-octave, the LEVEL control to full cut, then sweep around with the FREQuency knob until you find the first culprit. [. . . ]