Okay just remember seeing a band with folded horn and every time I went to walk to the side of the subs you could hear a huge difference in volume loss on the kick and bass but once you got back in front they would hit you hard. Keep in mind this was many moons ago like back in the 90's I can't even remember hat subs they had just remember they were folded horn design and huge and look like you needed a forklift to move them around.All thought the band was kick ass hair metal type.
My experience with horn subs, has never been great, the move to direct radiating subs has (IMHO) been a blessing for live sound. I was never a lover of bandpass boxes either, again far too coloured and a real tendency towards one or two note bass.I am still waiting to see someone instigate a really good example of truncated transmission line. In my experience I have found good TL designs to offer really great extension and an ability to "fill the room" even with limited numbers/size of speakers, albeit at low SPL's (bearing in mind to my knowledge no examples exist in the professional sound reinforcement market. In the past most TL design has been of the "rule of thumb" type with extensive testing and tweaking to achieve desired results, however, George Augspurger and Martin King have in very recent years both produced reliable, mathmatical models, Auspurger via an electrical model and King via a mechanical model, interestingly both's work arrive at similar results and conclusions. From what I remember I believe that Martin discarded the long held belief that stuffing slowed the speed of the air within the line, he further tested this to prove it was indeed the case and built his model from there. My understnading means that transmission lines can very succesfully be produced with much shorter lines than previously thought. Bing that most subs now are crossed over at around 80hz (possibly a little higher) the damping of the ripples should prove less of an issue.I'd be very interested in your thoughts Tom.My appologies for drifting way off topic, however, with Tom posting on the thread I couldn't resist!
Many over the years, initially the first I encountered were the Martin "w" bins, IMHO truly awful "boink" boxes, no bottom end at all. Others that spring to mind are Turbosound, Court Acoustic W bins (they had the advantage of porting to the front that gave the impression of more bass, Martin Wavefront folded horn boxes, none of these ever did it for me, have been using direct radiating boxes for last 15-18 years so I am probably not qualified to talk about anyone's latest developments in "horn" loaded boxes, that being said, I can't see how anyone has overcome the physics to give you a "true" bass response, outside of electronic jiggery.Just as an afterthought, I am talking about horn's with no direct radiation, not semi hybrid designs.
How big is too big for mobile use? Just curious.I build front-loaded horns (have been for 35 years), and it has always been my experience that the speaker excursion is significantly less than that in vented boxes. Can't vouch for folded horns, as I haven't played with one in years. Ivan and others are correct, horns can be directional or not, depending upon the specific design and size. I can say that a large (96" d x 96 h x 48 w) horn is very directional.
My experience lies completely with commercially made (or copied) bass horns. None of these was big enough to need a forklift. A large enough folded bass horn could provide some off axis attenuation. Another possible contributor is that if you walked to the outside of split L&R bass horns there would be less combined LF energy, IOW you are walking out of "power alley".HTH
What do they use in the array subs aren't those Direct or they a little of both ?
I am a bit confused by the question. Maybe you can restate it so it makes more sense?If you are asking if different types of subs are used-as a general rule, it is not a good idea to mix different types (models and styles-even from the same manufacturer) of subs.This is because of the different phase response of the different models. At some freq they will add togethers nicely and at other freq they will cancel either a little or a lot.In the "perfect" world the most summation you can get is 6dB when you double the number of subs.HOWEVER, in the "perfect" world, you can get infinate or total cancellation at some freq if the phase is 180° out (at the point of measurement. Other positions would be different.All sorts of arrays can be built to direct energy in a specific direction-or to cancel in a certain direction-or change the width of the pattern etc.It just depends on the end result needed-the tools and space available and the skill/knowledge of the person designing the array.
I was asking about array subs are they DR type of subs or FH type of subs or a little of both? I know about not mixing two different type subs together. Just wondering about the array subs like at the AC/DC last tour had a array system, but it was just a loud roar I don't understand any thing they played kind of disappointment to.
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