Re: Using a speaker switch
The key here is the speaker impedance which must not fall below the minimum specified for the amplifier, two 8 ohm speakers wired in parallel equals 4 ohms which may be ok but 2 sets of 4 ohm speakers will equal 2 ohms which is too low for most amplifiers. Some amplifiers won't mind switching between speakers but others will so switching off before you change over is a wise move.
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Graham
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