Forums Music Sound Engineering Sound System Plan: Sound Good? Re: Sound System Plan: Sound Good?

    sheffield-junglist;223109 wrote:
    (because it relies on the transistor effect which requires a logarithmic flare opening – possible with 2″ top drivers – and very effective, but ends up impossible to achieve with an 18″ driver in any meaningful way): I know the basic idea behind horns, throwing the sound further back so it is still clear a fair distance away but I havent got a clue what your on about in this bit :hopeless:

    The idea behind horns (originally) was more to try and achieve the kind of amplification that is possible with an instrument (like a trumpet), where the sound is amplified by the bell shape at the exit. Basically, what happens is the flare causes the air pressure countering the exiting sound pressure waves to match impedance. The result of this matching is something called the transistor effect – where a small input results in an exponentially increased output of the same sound. A great idea, but in practice not easy to achieve 😉