User manual RANE GQ 15

[. . . ] Anyone familiar with other graphic equalizers finds the GQ 15/GQ 30 just as familiar. Setting the IN and OUT GAIN controls to the same physical positions gives unity gain through the equalizer. That is, moving both slider handles together (keeping them aligned) always maintains overall unity gain from input to output. Many strange gain structure conditions may be handled with these controls. [. . . ] True balanced output interconnection only requires the use of pin 2, +, or tip, and pin 3, ­, or ring for signal transmission. It does not require pin 1, or signal ground. The signal exists differentially between the two balanced leads; ground is not involved. Again, have a look at Rane Note 110 for more detail. Expanding and/or daisychaining the inputs and outputs normally uses the 1/4" jacks. Three parallel input connectors allows driving a second signal processor or amplifier without special cabling. The PATCH I/O (Input/Output) jack makes connection to mixer Effects Loop insert points very simple. Just connect a shielded stereo tip-ring-sleeve (TRS) cable between the GQ 15's PATCH I/O jack and the TRS Effects Loop insert on your console. (Your mixer must use the tip = send, ring = return Effects Loop wiring convention. ) SIGNAL LEVELS. The GQ 15 is designed for all line-level signals. Signal levels from -10 dBV to + 4 dBu or considered normal and within range (at least 16 dB of headroom exists above these levels). Do not directly connect microphones into the GQ 15. Use a mic preamp (e. g. , Rane model MS 1) first. 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 1/4" TRS connector parallels the 3-pin connector described above. Tip is positive, Ring is negative and Sleeve is signal ground. The +, ­, and COMMON GND terminals of the barrier strip parallel the respective pins in the 3-pin and 1/4" connectors. Used for primary inputs and outputs or additional patch connections. This 1/4" TRS connector parallels the 3-pin connector described above. 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. [. . . ] This sort of test equipment lets you analyze the response of the combination of room and sound system and is the only accurate means available for setting up the GQ 15/GQ 30 properly. If you are unable to utilize science in this way, your ears will have to be the judge. It is a very good idea to always start the equalization process with the adjustable CUT FILTERS positioned all the way down. This guarantees full frequency control until you need to bandlimit it, at which time you move the appropriate control upwards to restrict the bandwidth. [. . . ]