Ample displacement/amplification capability within the range of human resonance, without destructive SBIR issues/modal issues. This is why it's oftentimes an outdoor phenomenon, while attending big shows etc.
I just this morning posted something very similar, in this
First, whether I'm enjoying mixing an outdoor show, or merely attending live events outdoors, when you're outdoors, the LF has this fantastic characteristic that is so elusive otherwise. The total absence of destructive LF modal behavior, or SBIR, is a trait that I'd love to have with any system. As wonderfully tight the bottom end is outdoors, the sound-field, or lack thereof, needs some measure of additional, diffuse, returns to the LP. So perhaps some type of anechoic below the transition, and ideally acoustically optimized above the transition.
Either an implementation of an idealized Double Bass Array, or some type of outdoor system with a wonderfully diffuse, fully enveloping sound-field at the LP. All this without any reflected, destructive LF energy. So indoor, the space would be anechoic below a spec'd frequency. Outdoor, physical elements would be placed as to be only diffusely reflective above a specified frequency. This way, all diffuse spectral cues are maintained to the sides and rear of the LP, and yet there is no destructive modal behavior.
It's amazing how well our psychoacoustic process is forgiving wrt various aspects of acoustic compromise. But some type of active design that possesses a reasonably smooth frequency balance, both on and off axis would be really nice. But time coherency in speaker design, implemented in a space that's damped properly (doesn't fight back) below the transition, would elicit a sense of speed that's difficult to achieve otherwise.
Ricci touched on snare drum EQ'ing. Ever since the kick drum became the new lead vocal
, this "mid bass punch" has become more and more frequently used within our terminology lexicon of audio. With a kick drum, many FOH engineers EQ in wildly different ways, because there are no rules. It's still in the creative process, and in need of some significant shaping to cut through a dense mix, and elicit the characteristic effect one is after.
One technique to really allow the kick drum to be prominent (mid-bass punch), is EQ'ing and examining the boom, smack, and click
The boom, is the characteristic thud of the nicely damped kick drum. Adding a measure of 55-65Hz will add this effect. Older, more classic rock kick drum is tuned higher, and it's less damped. Adding the smack, 2khz-5khz, highlights the initial transient of the kick drum. Without the smack, the kick drum easily gets lost in a mix. In a properly time aligned system, the smack allows the listener clearly delineate each individual beater hit. Lastly the click, around 7khz, is a little bit of spice to really allow the transient to cut sharply through the entire mix.
My point of sharing this information is that in my opinion, a system that's fully time coherent, these upper components add a significant element to the entire perceived
effect of mid-bass thump. Combined with the physical resonance of the body, which can be an incredible experience, the added high frequency aspect really makes the entire effect very clear and well delineated within program material
I believe a time optimized rig (increased perceived transient speed
), w/the absence of destructive SBIR, and without destructive modal issues, the clear and well defined acoustic energy can be entirely enjoyed by the listener. It's all about the room, and the room's all about the time domain.
Few indoor facilities possess these traits, but they're out there,....and one I check out on occasion. A casino, w/ an open bar in the center. High ceilings (~50') and no walls for hundreds of feet. Few problematic modal issues there,...but, torturous lack of boundary gain, and PVG. Amazingly, one can walk the room in full 360 of the act/PA, and clearly discern the terrible lobing of the separate subs spaced width wise, on each side of the stage. I've attempt to discuss things w/each FOH guy I see, however typical of the genre
, they're not much on suggestions.