Audio without numbers

[AJ Soundfield]

You folded up an 18" woofer , I wanna see dat ....

An 18" driver can be a 15" wide speaker, by "folding"...the dipole baffle. The driver remains intact.

 

[CPP]

http://www.audiodrom.net/en/as-we-s...uring-speakers-how-flat-should-a-flat-line-be

its all about the room

 

[AJ Soundfield]

Why some of the top speaker's and amplifier's designers use precise tools and measurements to create their masterpiece?

Because that's what they know best. Same reason they use it for your car, cellphone, airplane, computer, etc, etc.
If one is a practitioner of voodoo, magic or alchemy, then one can't use precise tools and measurements, because knowledge in those areas are deficient. So one does what one knows best, based on ones intellectual knowledge of how things work.
If one caters to non-critical thinkers, then the only thing required is for it to be written in some form of gospel, like a magazine for example. It simply becomes true by belief, no evidence required, except maybe anecdotes and indemonstrable fantasies indiscernible from physical reality.
Go with whichever suits one best.

http://www.audiodrom.net/en/as-we-s...uring-speakers-how-flat-should-a-flat-line-be

Yikes. Kindergarten level science understanding there. Here is a better, more adult oriented explanation Bob http://www.linkwitzlab.com/Recording/acoustics-hearing.htm
A quick laymans explanation, Stereo 1 & 2 http://www.linkwitzlab.com/Sound_field/Field_control.htm

cheers,

AJ

 

[AJ Soundfield]

its all about the room

Indeed. The soundfield (pardon the pun) heard by the ears is a product of the 3d radiation of the speakers into the room and the subsequent direct/reflected field. Understanding the attributes and relevance of both perceptually, when measuring, is key.

cheers,

AJ