False wall and audio sound

[hermanv]

I seems that with proper planning, it can be achieved.

Planning and some measurements. I encourage people to learn and experiment after all for most of us this is a hobby. At the same time it's neccessary to understand that people have devoted lifetimes to making speakers better, it is not a 1 hour task.

Baffle step is not a problem because the rear wave of the speaker is totally damped by using very thick acoustical foam to fully surround the speaker. If a sub is used, then less foam is needed because deep bass frequencies are not part of the equation.

One of us is missing something, surrounding the rear housing of a speaker mounted in a wall with heavy foam would accomplish little. There is no back wave because the sound is prevented from wrapping around the existing housing by the new front baffle (the new wall). Or doesn't the speaker fit exactly in the hole? Baffle step is that frequency where the wavelength is such that the sound becomes uni-directional rather than omnidirectional (i.e has a sperical apparent source) as a woofer in a box does at very low frequencies. This affects the launch of low frequencies into the room. With a very large flat face (the new wall) the frequency where there is a gain change due to the way the woofer couples to air will be different. Some may find it pleasing but the speaker response will no longer be flat. I've done exactly enough speaker design work to know that to get a flat woofer response in an arbitrary room is one of the harder stunts to pull off.

I'm not a big fan of equalizers, but that is one possible solution. Considering the few designs by Theo I've seen, the added cost of even a first class digital equalizer would be lost in the noise of money being spent.

If you think that accurately aiming a speaker is just small potatoes, then try to get it accurate within a millimeter by eye. Nothing is unimportant when somebody is paying for quality. Laser pointers are just as important as eq's, they all work together to get quality.

There is nothing wrong with basic accuracy but I found the juxtaposition of precise aiming yet no mention of equipment or analyzers or expected effort to re-equalize the speakers odd. Although some speakers have a narrow sweet spot, I've never owned one that needed adjustment to the nearest millimeter. If one owned such a speaker could only one person watch TV?