This new diffuser??, is located behind the mid drivers of the new Borresen speakers.
Yet I've seen the same treatment by the new Yg acoustics Peaks series.
One design is ported the other is sealed.
... I'm confused...
Could someone explain the benefits of such a treatment?
Yet I've seen the same treatment by the new Yg acoustics Peaks series.
One design is ported the other is sealed.
... I'm confused...
Could someone explain the benefits of such a treatment?
Who knows if it is perhaps intended as a resistive element. I recall many years ago I wanted to do things like this in an attempt to isolate the driver from cabinet issues. I'm sure many have had that idea.
Understood. Too bad I haven't made a photo of the Yg Acoustics open model they presented in Munich. The similar looking treatment was also mounted behind the driver, and behind it a stuffed cavity.
While I'm guessing it occurs to me I've seen cabinets like this along the lines of the double tuned reflex but with a sealed second chamber.
One would think the structure shown would reflect less sound back to the speaker in front of it, than a solid wall in the same position.
It's also - as mentioned - going to place resistance in the path of the sound, so the level coming out the other side of it will be attenuated. Now whatever sound is in the chamber behind it is less than it would have been w/o the holey partition placed in the way. If there's sound absorbent material in that box, it has less to energy deal with, as some of that got caught up going through the holes via friction.
Clearly whomever implemented it believes it's beneficial, versus other physical structures that could be placed behind a speaker to contain and/or dissipate the rear radiation. Like a daggar shape, or cone, or...array of spikes, some irregular shaped surface.
Here is a quote on the subject from Diyaudio.com member Ian J.
Briggs' (of Wharfedale fame) classic 'Loudspeakers' he mentions a device called an acoustic filter - essentially a solid shelf brace with slits cut into it- to be used between drive unit and vent in a reflex enclosure. Apparently this reduces excessive cone excursion at low freq. and makes the box 'act as though it were bigger' which would square with it being an internal aperiodic damping device.
Briggs' (of Wharfedale fame) classic 'Loudspeakers' he mentions a device called an acoustic filter - essentially a solid shelf brace with slits cut into it- to be used between drive unit and vent in a reflex enclosure. Apparently this reduces excessive cone excursion at low freq. and makes the box 'act as though it were bigger' which would square with it being an internal aperiodic damping device.
Does KEF meta ring a bell? If not, read their recent white papers. They use a "meta material" absorber behind their mids to keep internal reflections from going back out the cone.