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#WAVES X NOISE DELAY MANUAL#
If you’d like a more detailed reference check out the updated manual with additional info on cardioid setup: One has to adjust the solution to suit the venue and the event. When center-stacked subs are done on a festival scale stage, the center area mid and high frequency content is supplemented with center fills.
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For instance, on a smaller scale, if the tops are way far apart and the subs are center stacked, the system won’t deliver an even and balanced sound throughout the audience area. The disadvantage is that it can concentrate the sub energy in the center, where there may not be a balance of enough highs to keep up, and at the same time leave the left and right sides out of balance with too much mid and high energy relative to the sub level there. The primary advantage to center placement is the avoidance of nulls caused by interference between the two separated sub locations. Sometimes the available space dictates where you can set up, so you have to be able to do either. Whether to run left-right or centered is a question all of its own. By running your system in cardiod mode and minimizing those reflections, you can achieve a better result in both level and clarity for the audience and the band or DJ on stage. Without a cardiod setup, the sound that would ordinarily reflect off the wall behind the stage or DJ would arrive in the audience area out-of-phase with the direct sound from the subwoofers and it often causes loss of level and loss of impact. When indoors, if there is a wall behind the stage, cardiod setups will also reduce the amount of energy that is reflected off that back wall and back out to the audience/dance floor area. When outdoors, a cardiod setup will reduce the sound pressure level of the low frequencies on stage and in the area behind the stage.
#WAVES X NOISE DELAY FULL#
When you use cardioid pairs, it’s best to reduce the level of the reversed box by 3dB because one cardiod-mode reversed box at full output can compensate for the rearward radiation of two boxes in normal mode.
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A combination of three boxes, with two facing forwards and one backwards, is the ideal combination however they can also be used in pairs. Those dips can cancel far more energy than what you lose by dedicating one of your subwoofers to backwards-canellation-duty, aka cardioid mode.Ī cardioid setup works indoors or outdoors and works with a minimum of 2 boxes no matter where you put them, unless they are under a stage or backed up against a wall. Those reflections can cause big, nasty dips in the frequency response observed in audience and dance floor areas. One of the advantages to cardioid-configured subwoofers indoors, besides keeping levels down behind them, is virtually eliminating the reflections that come from walls behind the subwoofers. Nevertheless, over the majority of the operational bandwidth of the test boxes, there is a big difference in what you hear and experience behind vs in front. The effectiveness does taper off below 30Hz because the wavelengths get too long for the offset distance of the depth of only one box to control. The graph indicates that the level reduction is over a large range of frequencies. The upper (yellow) line is the output SPL at one meter from the audience side, or what you might call the front of the cabinets, and the lower (pink) line is the output SPL at one meter from the stage side, or back of the cabinets. The response graph above shows the forward vs rearward radiation of a pair of subs in cardioid configuration. There are “passive cardioid” loudspeakers that use tuned ports on opposite sides on the enclosure to create the cardioid effect however their operational bandwidth and output is limited relative to active cardioid systems. Two identical subwoofers used side-by-side in a conventional setup would deliver more output to the front, and also to the rear, than the same two subwoofers used in a Cardioid setup, however, in the Cardioid setup there will be MUCH less output to the rear and only slightly less output to the front. That can mean keeping bass away from neighbors, off stages, away from turntables or keeping it from reflecting off walls and causing destructive interference elsewhere in a room.Ī cardioid speaker or array requires more parts, more processing and ultimately more money than an ordinary subwoofer system. The result of a properly deployed Cardioid Array is the ability to focus more bass where you want it and have less go where you don’t. Polar plots are measured at individual frequencies or frequency bands because they graph output relative to position rather than output relative to frequency so there would be slightly differently shaped graphs through the operational range of the loudspeaker in question.