In article , Chris J Dixon
wrote:
Serge Auckland wrote:



If the dining room application is for background music during meals,
then it should work fine by attenuating the 'speakers relative to the
others. Unless you know how many dBs you need to attenuate, and can
then calculate the series resistance value,

It is hard to say exactly, my ear isn't calibrated ;-)

I reckon that if I picked a figure out of thin air, then bought two
resistors for each speaker totaling that figure, ( say 1R & 2R2) by
experimenting with using them singly or series/ parallel, I would get
quite a range.

For an 8Ohm speaker using those in series would give 1dB and 2dB. Chances
are that you'd hardly notice the change in volume.

If I wanted, for example, 3 dB attenuation, what resistor would you
calculate?

The answer will vary with the spectrum of the music and the
impedance-frequency variations of your speakers. Unless your speakers have
the same impedance at all audio frequencies... which seems unusual.

Slainte,

Jim

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