![]() ease of construction, available space (and therefore compactness, less weight, etc. Of course there're some advantages and disadvantages, as I mentioned, i.e. However they're 'flush' mounted with all the other chassis to the baffle but not directly connected to the baffle. ![]() I'm sorry that I had a specific design in mind (which might be more or less common) and didn't post a picture to make that more clearly.Īnother example: If you look at many (professional) PA speakers you find very often the tweeter horns mounted right in the middle of the mid(/bass) horn mouth. That's what I had in mind when I was trying to explain the (un)necessity of the flush mounting with the baffle.Īs an example: If you take a look at many line arrays, which are made of stackable boxes covering just the mids and heigths or even full range, with a waveguide in the center for the hights and right besides to the left and right are the mid horns positioned there's often no additional baffle space for the waveguide(s). But it is in deed not absolutely necessary! Of course you will find some audio enthusiasts which have a completely different opinion about this and I hope someone else will jump on and will give us his opinions, proof or whatsoever. Depending on the order of the crossover the phase can be shifted quite far and therefore the time from the input of the crossover to the output to the chassis.Īfter all it's just a question of design (ease), costs, compromises and other (more or less understandable) factors why in most cases the flanges are flush mounted. In this case the voice coils of the chassis are not directly mounted vertically under each other since for instance tweeter, midrange and bass horns usually are of different length - most likely the lower the frequency the longer the horn.įurthermore crossovers are known to 'delay' the sound, because of their capacitors and inductors forming a complex load for the driving amplifier where the voltage is not in phase with the current. 340m/s therefore giving the constant on which you can calculate what the necessary time-delay would be if all 'ways' of the whole speaker are flush mounted. The wave just travels with the speed of sound which would be approx. This needs a time-aligned output in a multi-way loudspeaker for a smooth over-all frequency response curve. The geometrical point where the sound is produced (the voice coil) and where it leaves the waveguide/horn is in some cases far away from each other. Nevertheless another effect is getting more and more important when dealing with waveguides and horns. Believe me or not but that's physics and it happens but I'm not going to explain that any further right now. However any sharp corners close to the point where the sound exits the path of the wave should be avoided (if possible) to suppress any reflections from such corners even if there's no 'wall'. If this baffle-step is taken into account at the time the crossover was designed there's no big need to worry about that - basically. However there's a so called baffle-step diffraction (google for it and you'll find as much info as you want). In most cases are just cosmetical reasons involved why the flanges are flushed with the baffle. Who said so that it must be mounted that way?
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