This will be a line source speaker not a line array.. it won't be nearly large enough to produce line array behavior across most of the spectrum.

Which manufacturer’s marketing does this snippet of technical information come from? An array can be defined as an arrangement of similar objects, usually in rows and columns. As such a columns of loudspeakers, irrespective of size. can be defined as an array. If there is only a single column, line array seems appropriate.

As for the theory, Olson’s oft quoted book Acoustical Engineering refers to a straight-line source, which it says, may be made up of a large number of points of equal strength and phase on a line separated by equal and very small distances. If the number of sources n approach infinity and d, the distance between the sources, approaches zero in such a way that nd = l the limiting case is the line source. So, presumably line source is good. No mention of an array.

The design ideals with these speaker types are a single tall column of drivers with center to center distances as close as possible... which means drivers frames touching(no separation of drivers), this is important as it increases the range of frequencies over which the column produces a coherent wavefront. Even with this done the system will produce a lot of comb filtering above 7khz were sound wavelenths are less than the driver c-c spacing.

The theory behind centre to centre spacing presumes that the sources are ideal points. That is, their size is insignificant to the wavelength. As such, no sound is radiated from the gap between the points. In practical loudspeakers, at frequencies where the spacing between elements becomes significant, each drive unit can not be considered a point source, and imparts directivity. You can’t ignore that the edge of the drive unit is also radiating sound, not just the centre. If the drive units are touching there is no clear centre to centre spacing.

hi there, i am interested to learn from this, but could not think of how this would work out in building something.

There are plenty of acoustic theory books, if that is what you want to learn, assuming that you have some knowledge of mathematics. If all you are interested in is building loudspeaker cabinets, fortunately any drive unit, in any box, will make a sound.

afaik, as wavelength becomes smaller with higher frequencies, you would get a lot of lobes of phase cancellation between the speakers. for bass, those speakers are too small to give significant output.

Off axis cancellations are what gives a line array its directivity. Outside, discrete side lobes are not much of a problem if they are outside the required coverage area. Inside, reducing them improves intelligibility.

Whether the mentioned loudspeakers provide sufficient level, or low-end response, depends on the intended use. Not all situations demand levels that will cause early onset hearing loss.

fudge22 wrote: There are plenty of acoustic theory books, if that is what you want to learn, assuming that you have some knowledge of mathematics. If all you are interested in is building loudspeaker cabinets, fortunately any drive unit, in any box, will make a sound.

thanks, i recently finished bob mccarthys book, which was a bit more helpful in learning than your comment.

fudge22 wrote: Off axis cancellations are what gives a line array its directivity. Outside, discrete side lobes are not much of a problem if they are outside the required coverage area. Inside, reducing them improves intelligibility. Whether the mentioned loudspeakers provide sufficient level, or low-end response, depends on the intended use. Not all situations demand levels that will cause early onset hearing loss.

One of things that many do is load as many loudspeakers remotely feasible on an amplifier and, crank it up. Using one amplifier for each loudspeaker allows you to accomplish more creativity in terms of performance. It is a more costly method that the cheapskate mentality of many sound professionals refuse to do. This in turn, will lead to a lot reasons not to do it. However, you must follow your own path and choose what is best for your requirements. Your method would work!

Best Regards,   

As VituixCAD allows you to import numerous measured results from a wide variety of programs, the end results will be more accurate than, focusing solely on a static simulation program.

Definitely more next level of design that many are not doing when building a loudspeaker system.

Best Regards,  

Queridos amigos de Speakersplans.com,

Quiero expresar mi más sincero agradecimiento a todos ustedes por su invaluable ayuda y la información que me brindaron. Su conocimiento y disposición para aclarar mis dudas han sido fundamentales para mi proyecto.

Desde aquellos que compartieron su experiencia técnica hasta quienes me proporcionaron enlaces útiles y consejos prácticos, cada uno de sus aportes ha sido de gran valor. Estoy realmente impresionado por la amabilidad y el profesionalismo que caracteriza a esta comunidad.

Gracias a sus sugerencias y orientaciones, ahora tengo una comprensión mucho más clara y sólida de los temas que me preocupaban. No podría haber avanzado sin su apoyo.

Ahora me preocupa otro tema, el diseño del filtro de frecuencias crossover para este tipo de altavoz y estaba pensando en diseñar y construir un filtro pasivo divisor de frecuencias de 24 dB por octava (4to orden) con una sola vía para un rango de frecuencias entre 150 Hz y 20 kHz para altavoces de 250 vatios RMS con impedancias entre 4 y 8 ohmios, creo que ese tipo de filtro normalmente no se vende y me tocara fabricarlo y he estado investigando un poco y he encontrado esto

Para el Filtro Pasa-Alto (HPF) a 150 Hz:

Para una impedancia nominal de 4 ohmios: C1  = 265 μF y  L1= 4,24 mH
Para una impedancia nominal de 8 ohmios: C1= 132 μF y    L1= 8,48 mH

Para el Filtro Pasa-Bajo (LPF) a 20 kHz:
Para una impedancia nominal de 4 ohmios: do2= 0,2 μF y   L2= 15,9 μH
Para una impedancia nominal de 8 ohmios:  C2= 0,1 μF y   L2= 31.8 μH

Ahora el tema seria donde conseguir sobre todas las bobinas y condensadores con esos valores aquí en españa.

Les dejo unas fotitos de lo que he ido adelantando