Starting at not much over £225, these represent a dramatic improvement in the way you can manage your loudspeakers when compared to analogue systems. As you can see from Figure 5, bass is not always omnidirectional. The spacing here is quite critical, with the inner pair 16 feet apart and the outer pair 24 feet apart. Difficult room acoustics, combined with improper loudspeaker placement, can interfere with achieving the fidelity of which your loudspeakers are capable. If the main FOH speakers are full-range types — say, 2 x 15-inch speakers or larger loudspeaker stacks — you can even use those as your 'outer' subs, but the same applies: the central subwoofer must be at least equal in level. Adding a central cardioid subwoofer array to the two either side, and subjecting the outer arrays to a 2ms delay (assuming a spacing of 16 feet), improves things significantly. Win! Of course, you could buy ready-made cardioid loudspeakers... or you can create your own! Above a certain frequency they will act as a reflector and diffuser, and below this it behaves as a resonator. You may login with either your assigned username or your e-mail address. The advantages of removing bass frequencies from the satellites, stacks or arrays are numerous. It's extremely common to see subwoofers placed on either side of the stage, in roughly the same position as the mid/top speakers — even though this is quite possibly the worst way to arrange them! Put simply: don't do it! So you have decided that the purchase of one or more subwoofers is a Good Thing in all respects. Now, we have to get really clever with our DSP loudspeaker management unit, and work with both the input delays. It's an improvement, but there are still some very deep nulls throughout the audience area. The good news is that many manufacturers are now bringing 18-inch and 15-inch subwoofers to market at unbelievably low prices — mostly driven, I suspect,Figure 2. The rear-facing cabinet must be connected in reverse polarity and a delay applied. This time, the subwoofers are slightly closer together, at a distance of 16 feet. In Figure 7, the centre sub is placed some 12 feet behind the front loudspeakers. One is manufactured. In terms of your investment this quality/performance ratio just wasn't available a few years back. Assuming all the cardioid stacks are the same, all the output delays set to the rear-facing cabinet will be identical. The baffle area is doubled and, like coupling horn mouths, you will gain some additional bass extension. If you have four subwoofers, you can try the configuration shown in Figure 8. The red line shows the coverage at 40Hz, blue at 60Hz and green at 100Hz. What is a "hybrid" audio interface anyway? Hello! First Look: Pro Tools | Carbon. When you've found where it sounds best, relocate the sub there. The same polar plots will be achieved in other locations, including the back of the stage against a wall,Figure 7. Even if you place both cabinets off centre stage, however, the response is practically the same, as shown in Figure 4 (although, depending on the size of the venue, the level of the off-centre pair will start to reduce its response at the furthest point). Page 1 of 2. PreSonus StudioLive 32SC Series III Mixing Console, Inside Track: Machine Gun Kelly 'Concert For Aliens'. Let’s first remember that sound propagates differently depending on frequencies. The inner two subs are 16 feet apart, with the outer pair being 24 feet apart, and spaced one foot further in front. Figure 10. Let’s try to understand why, first. Your email address will not be published. 9th June 2020 #1. jallejulius ️. This is because though a subwoofer is the best alternative for the improper sound speakers, the same may not work appropriately if they are not installed properly. This is a polar response of frequency distribution, showing the response and deep nulls when bass loudspeakers are placed some 20 feet apart. To enhance the overall listening and performance experience, their placement in a room, on stage or below it is, in fact, critical. The differences between studio engineering and live sound are like the differences between porn and sex. Pick the location in the room which provides the most accurate … Christophe Anet is an electroacoustics engineer and senior Product Marketing Manager for QSC Live Sound. While this might produce an optimal performance for the satellites, Figure 2 shows what happens to the bass response. Finding the right place is a matter of getting down on your hands and knees, moving around and listening to some well-recorded bass, with the sub in your normal listening position. If you are in a position to place the subwoofer centre stage, this avoids all the problems of cabinet spacing, and an even bass response may be achieved.