User manual RANE GQ 30

[. . . ] FOR BEST NOISE PERFORMANCE ALWAYS POSITION BOTH CONTROLS AS FAR TOWARD THE TOP OF THE UNIT AS POSSIBLE WITHOUT LIGHTING THE OL INDICATORS. Setting curves is as easy as it is on all Rane graphics thanks to our unique interpolating constant-Q circuitry. For more information on setting up your curves correctly, again, see the back page. Set the CUT FILTERS controls for the desired low and high cut frequencies. [. . . ] POWER INDICATOR This yellow LED lights any time remote power is supplied from either a RS 1 single power supply or a RAP 10 multiple power supply. Note that this indicator is electrical, not political. SYSTEM CONNECTION (continued) OUTPUTS, The GQ 15's outputs mimic the inputs. True balanced output interconnection only requires the use of pin 2, +, or tip, and pin 3, ­, or ring for signal transmission. The signal exists differentially between the two balanced leads; ground is not involved. 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. Signal levels from -10 dBV to + 4 dBu or considered normal and within range (at least 16 dB of headroom exists above these levels). Use a mic preamp (e. g. , Rane model MS 1) first. REAR PANEL DESCRIPTION 1. This 1/4" TRS connector parallels the 3-pin connector described above. The +, ­, and COMMON GND terminals of the barrier strip parallel the respective pins in the 3-pin and 1/4" connectors. This 1/4" TRS connector parallels the 3-pin connector described above. This 1/4" 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 GQ 15 into Effect Loops as painlessly as possible, using a single 1/4" 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. This switch provides the ability to separate chassis ground and signal ground. In some circumstances, moving it to the opposite position eliminates stubborn hum and buzz problems. If you arc tempted to try moving this switch with your power amplifiers turned on and up, DON'T BE. ALWAYS TURN YOUR AMPLIFIER LEVELS DOWN BEFORE CHANGING YOUR GROUNDS AROUND and then bring them up slowly. [. . . ] The best way to find out what room acoustics are doing to your sound is to use either a real time analyzer or any of the many computerized measurement systems such as time delay spectrometry or other similar devices. 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. [. . . ]