I would never presume to know what the EQ settings will be and will always start with the EQ flat. Usually cutting four or five frequencies a bit is enough to tame the resonances in a room.Think of the graphic EQ as a method to match the system to the room. Once you have done that, just use the channel EQ to make any changes you want to individual inputs.Steve.
Hi Art. We're using Yammy 115V's for mains, behind us (Bob Leonard's method), and have only tried this once or twice. I can get acceptable levels, I just want to see if I can improve my system.
Monitors right now are Peavey PR-12 (which I hate and am returning - to be replaced with Yammy CM12Vs.)
Bob,Putting the speakers behind the mics as you have done should eliminate the need for monitors, but makes the mics prone to HF feedback. From what I understood from Bob L., and my own experience, the mains can be placed in a flanking position and still cover you and the audience OK, but in the position you show as soon as your head is not between the mains and the mic, it will feed back if you are using more than moderate gain.Your mains are more focused at the mics than your monitors, if you want to use both, prop the monitors up so you are looking down the center of the horn, and move your mains so you are out of their coverage pattern. Monitors work because they face the "dead" side of the cardioid mic pick up pattern, you can't expect as much gain from the mains when they are on the side of the mic that hears well.That said, skip the monitors, put the mains out of the mic pickup pattern and use some in ear monitors and your feedback and intelligibility problems will be gone.Art
One thing no one's mentioned is your mic preamps. If they're too hot you're much more susceptible to feedback. You don't need you trim/gain/pre-amp cranked to get decent sound out of your mics if you've got some headroom in the system elsewhere. I'm also of the mindset that you really shouldn't have to do much of anything with your channel strip eq other than rolling off your lows if you don't have an adequate HPF. Mine remain at 12 oclock almost 100% of the time for every channel. Making changes there before EQing the system is a recipe for disaster.
I may be missing something here but are the system EQ's not used to tune the room and the discrepancies in the cabinets themselves?? No cabinet will be flat unless it comes with its own processor that will have notch filters built in to adjust the resonant frequencies out of the cabinets, even with a processor it would be very hard to come accross a completely flat room. In my humble opinion you should always tune the system first with a vocal mic to get an idea of what the room is doing then run some good quality well produced music through to further tune the system, once the sytem is as close to flat as you can get it then use the desk eq's to tune each line.......my next peice of advise is pretty much the same as Tim has said, dont be scared to cut frequencies to reach your objective after all isnt that why the eq has the ability to cut in the first place? if you have a gain loss due to cutting frequencies this can be made up through the desk, compressor or crossover output stages.....usually a little bit added to each will assure a cleaner signal path unless you are using high end compressors such as Aphex Compellor/Dominator or such...................of course using a program such as SI Smaart or another RTA program on a laptop would make life easier but not necessary
The only EQ that can "tune" a room is the D9 EQ. It can flatten things in a hurry./nudge, wink
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