Paul Harris wrote:

On a bulletin board there was a query concerning fitting
different plugs to get speakers with +ve & -ve wires from
an old sound system connected to a new amplifier with phono
connections.

The standard connection is to wire it so that positive voltage on the
red terminal makes the bass unit move out of the voice coil gap, i.e.
produce a positive sound pressure. Absolute polarity is sometimes
audible, sometimes not, and sometimes properties (2. harmonic
distortion) of the loudspeaker (or microphone) makes it more audible
than it would otherwise be. Listen for what happens with spoken voice.


Kind regards

Peter Larsen

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