In article , Tim Martin
wrote:

"Jim Lesurf" wrote

If we ignore all the above complications and assume two speakers, each
radiating *in phase* at the same level then the result at a listening
location equidistant from both is a *6dB* rise. Not 3dB.

I thought that was only if they were reproducing the same signal.

The context of the discussion from which the above quote is snipped was
that the two speakers were being driven from the same source (signal)
albiet with a crossover that may affect the amplitude/phase relationship.
The "ignore all the above" indicated that the crossover, etc, didn't change
the phase relationship so the two units were being driven with the same
signal in time alignment.

Slainte,

Jim

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