A note about Tube Amps: If you are going to use your speaker selector with a tube amp, you'll need to be aware of some additional specifics. Almost all tube amps must have a load connected at all times. Speaker selector manufacturers may recommend that you either leave one pair of speakers on at all times or permanently connect a 150 ohm, five-watt resistor across the tube amps output in parallel with the switcher. The speaker selector's user manual should detail for you any specific recommendations about using tube amps with a speaker selector.

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