On 11/29/2013 12:00 PM, Phil Allison wrote:

"William Sommerwerck"

This is a common source of confusion. "Same direction" means "outward or
inward", /not/ same direction viewed from overhead. The same signal should
produce compression or rarefaction from all speakers.


** Correct.

Phasing similar speakers is all about making the low frequency output from
each *reinforce* the others rather than cancel.

Compared to the wavelengths of low frequency sound, woofers are a point (
hence omnidirectional ) source of sound pressure - so it is irrelevant
which way the cone faces.

Ideally, a listener should be seated at the same distance from each speaker
so all time ( of arrival ) delays are identical and do NOT create phase
changes.


... Phil


There is no such thing as correct time of arrival type of phase
coherence in modern electronic media. Everything is close-miked and
smeared together with "pan pots" and any spatial sensation is created
with DSP. In real life, the stereo "sweet spot" has room for one person
at a time.

Put your speakers where they make sense to you. The floor reinforces the
bass. The wall reinforces the bass. Too much bass get spkr off floor and
away from wall, for more bass put speaker in corner. Usually you want
the tweets at ear level, unless they are harsh.